( )-101.fm

Size: px
Start display at page:

Download "( )-101.fm"

Transcription

1 Journal of the Korean Ceramic Society Vol. 47, No. 6, pp. 503~508, DOI: /KCERS The High Density Sintering of Green-emitting -SiAlON:Eu Ceramic Plate Phosphor Young-Jo Park, Sung-Hoon Lee, Wook-Kyung Jang, Chang-Bun Yoon*, and Chulsoo Yoon* Engineering Ceramics Research Group, Korea Institute of Materials Science, Changwon, , Korea *Electro Materials and Device Center, Samsung LED, Suwon , Korea (Received September 27, 2010; Revised October 18, 2010; Accepted October 26, 2010) Ÿ -SiAlON:Eu v p xÿ e y Á zá Á *Á * w» (KIMS) * z ( ; ; ) ABSTRACT Eu 2+ -doped β-sialons (Si 6-z :Eu y ) are recognized as promising phosphor materials to build an white LED for lighting application due to its excellent absorption/emission efficiency in the long wave length region. In this research, the fabrication of β- SiAlON:Eu plate phosphor by sintering was investigated with fixed Eu content(y) and varied composition of the host lattice(z). The addition of the activator Eu 2 lead to enhanced densification by forming the transient liquid phase. The refinement of a composition by the calculated lattice parameter indicated that the measured composition of the fabricated specimens is nearly same to that of designed one. The single phase β-sialon:eu plate with relative density of 96.4% was achieved by addition of 2 wt% CaO, which implies the possibility of full densification by adjusting the processing variables. Key words : Phorphor, LED, SiAlON, Sintering, Plate 1. LED ƒ t LEDe+xŸ, xk xÿ yw w r p LEDe s.» r p 1) ³ yw, û, y Ÿn w Ÿp y qj, w qj ƒ y w š. w v p xk xÿ yw w» w w w» p w qj y š LED w» š. ù x ¾ v p xÿ v mk t œ š v p xÿ w w š w. v p xÿ w qj x 2) w» w v Ÿn (translucence), Corresponding author : Young-Jo Park Tel : Fax : Ÿ Ÿ (photoluminescence)» (mechanical properties) y ƒ p œ m š y. wš LED š šz y /y / x Ÿ w yww w š ƒ ƒ w št wš. x r y y ƒ ( ) y xÿ w œ w û ey» w q»/ q Ÿ / w» w ƒ š. 3-13)» ü w w y yy xÿ ( ) y xÿ w š w». p, t y (SiAlON) xÿ ƒ š, w ¾ Ÿq ùkü ƒÿ š. 3-7,10-13) š v (Eu) v Ÿw k e y w œ w 503

2 504 Á zá Á Á Table 1. Nomenclature and Composition of Specimens z Si 3 N 4 (g) AlN(g) Al 2 (g) CaC (g) Eu 2 (g) β β β β1ex β1ex w» wš w. 2. x Si 6-z :Eu y t w k xÿ w w Si 3 N 4 (SN-E10, Ube industries, Ltd., d 50 =0.3 µm), AlN(grade B, H. C. Starck, d 50 =2~4.5 µm), Al 2 (AKP-30, Sumitomo Chemical, d 50 = 0.1~0.3 µm), CaC (99.9%, Kento Industries, Ltd.) Eu 2 (99.99%, Aldrich, nm ). y Eu ƒ y 0.04 š w, ƒ w 0.3 mol% w w. z 0.2, w ƒƒ r β1, β2, β3 ew. š β1 w CaO 1wt% 2wt% ƒw w w ƒƒ β1ex1, β1ex2 w (Table 1). yw w, g y³ w, ù» w 150 rpm, s p» w 200 rpm z g. yw z #100 w ƒ wš, w w 10 ƒw. 15 mm 1.2 yw e w x z 200 MPa 5 w þ x w ƒ ƒƒ 14 mm 4.5 mm x w. x ƒ» (BN:Si 3 N 4 =1:1) ƒ w. CaO CaC wƒ CO 2 yw w» w 900 C o w 1 w œ w w, 900 o C z 0.1 MPa ƒ n w w z 0.9 MPa w LtoH1800, LtoH1900, LtoH2000 x 5.0 MPa w 5MPa2000 x ww.» x ùk ü 4 m w. yw s Beckman coulter LS w d w, yw w d LECO Oxygen/ Nitrogen analyzer model e w. Rigaku D/Max 2200 w w, ƒ 90% w - v d w w š, 90% j w. 3. š 3.1. yw w e y yw (%TD) d Fig. 1 ùkü o C w β2(z=1.0) r e y ƒ ƒ w, 2000 C o β1(z=0.2) r ƒ w 97.5% d o C LtoH MPa2000 β1 Fig. 1. Measurement of (a) relative density and (b) weight loss of specimens sintered by various conditions. w wz

3 Ÿ β-sialon:eu v p xÿ e y 505 Fig. 2. XRD patterns of (a) normal scan and (b) slow scan with Si as a standard material. Specimens were sintered by LtoH2000 condition. w, β2 β3 0.9 MPa w 5.0 MPa ùkû.» ƒ Fig. 1(b) v w w., w ƒ β1 r» w ùkü w ƒ, β2 β3 r û» (0.9 MPa) ƒ j» ƒ š» (5.0 MPa) ƒ. k ù Pettersson SPS(m y ƒ ), HIP(š ƒ ) HP( ƒ ) p w w e yƒ ƒ w šwš. 14) w j» w Ekstrom yw k 1wt% Y 2 ƒw k w 1800 o C 93% w š šw. 15) Ÿ» w y Eu wt% ƒw, Y 2 w w ww» w e y» w. ù Fig. 1(a) 1800 o C β2 r 90%» w e wš. XRD w» 3 k x w y, Fig. 2 LtoH2000 XRD ql w. Fig. 2(a) z ƒw ƒ f» vj eƒ Fig. 3. XRD patterns of β1 specimens collected by (a) normal scan and (b) slow scan with Si as a standard material. ƒ w vp w. Fig. 2(b) ùkü r t t g gqw w vj e Bragg's Law w w Ekstrom w w r z w. 15) a(å) = z a c(å) = z c a w w z a c w w z c s³ w z β1, β2, β3 r ƒƒ 0.23, 0.94, 2.12 w ƒ. w r» 47«6y(2010)

4 506 Á zá Á Á Fig. 4. Measurement of (a) green density and (b) sintered density of specimens prepared by planetary milling(pm) and ball milling(bm). Specimens were sintered by LtoH1800 condition. w k x Fig. 3 XRD ql y w. Fig. 3 z 0.2 w β1 r β2 β3 r w w ùkü.,» XRD ql vj eƒ ew w z ùküš, ƒ û w LtoH1800 x sx w k w ƒ q. ù vj eƒ ew ü y Eu š» TEM w yw w e y ƒ β1 ƒ β3 r w w yw w LtoH1800 w. CIP x d w Fig. 4 ùkü. w x ƒwš β1 r 9%, β3 r 6% s ƒw. p, β1 r Ekstrom 15) w š 93% w 95% ƒ d y ƒ Eu 2 ƒ w ww q. w z s y» w., (PM) w (BM) š s» x ƒ ƒwš w q (Fig. 5)., β1 w yw ww, t yd w w Fig. 5. Particle size distribution of mixed powders prepared by planetary milling(pm) and ball milling(bm). w w 1.5%. z d ƒƒ 3.2% 3.9%, w w Si 3 N 4 AlN yƒ ƒ yd SiO 2 Al 2 ƒ w ƒ CaO ƒ e y e w 2000 o C x ƒ e y š Ÿ p w d β1 w CaO ƒw e y e w w. Hewett š w Ca-α-SiAlON yw CaO w CaO ƒw w wz

5 Ÿ β-sialon:eu v p xÿ e y 507 y ùkü., l y mw w ƒ ƒ w x., CaO ƒ w ƒ ƒ k ƒ ƒ w, 1800 C 96.4% o ƒ œ w e yƒ ƒ w. Acknowledgment 2009 LED. Fig. 6. XRD patterns of β1 specimens with- and without-cao addition sintered by LtoH1800 condition. w ƒ w. 16) β-sialon: Eu v p xÿ yw CaO s ww, CaOƒ ƒ β-sialon α-sialon x w» ƒ 1wt% 2wt% ww ƒƒ β1ex1, β1ex2 t»w (Table 1).» CaO ƒ r LtoH1800 w d w β1ex1 β1ex2 r ƒƒ 96.2% 96.4% CaO ƒ β1 r 95.0% s w. r (Fig. 6), q 2 x k w», CaO ƒ Ÿp w e š w j. 4. xÿ w LED qj x Ÿ + w r p w LED xw» w y v p x xÿ w ww. v v k xÿ (β- SiAlON:Eu) š e y» w., w œ j», s y w x w e, x 4 w 24 w ƒ., y ƒ Eu 2 x w w k 1800 o C 95% e REFERENCES 1. K. J. Choi, S. D. Jee, C. H. Kim, S. H. Lee, and H. K. Kim, Luminescence Characteristics of Mg 2+ Ba 2+ Co-doped Sr 2 SiO 4 :Eu Yellow Phosphor for Light Emitting Diodes, J. Kor. Ceram. Soc., 44 [3] (2007). 2. H. Gerard, B. Serge, and P. Mark, White LED for Backlight with Phosphor Plates, US patent , Philips lumileds lighting Company, LLC (2007). 3. J. W. H. van Krevel, J. W. T. van Rutten, H. Mandal, H. T. Hintzen, and R. Metselaar, Luminescence Properties of Terbium-, Cerium, or Europium-Doped α-sialon Materials, J. Solid State Chem., (2002). 4. R. -J. Xie, M. Mitomo, K. Uheda, F. F. Xu, and Y. Akimune, Preparation and Luminescence Spectra of Calcium- and Rare-Earth (R=Eu, Tb, and Pr)-Codoped α-sialon Ceramics, J. Am. Ceram. Soc., 85 [5] (2002). 5. R. -J. Xie, N. Hirosaki, K. Sakuma, Y. Yamamoto, and M. Mitomo, Eu 2+ -doped Ca-α-SiAlON: A Yellow Phosphor for White Light-emitting Diodes, Appl. Phys. Lett., , (2004). 6. R. -J. Xie, N. Hirosaki, M. Mitomo, Y. Yamamoto, T. Suehiro, and K. Sakuma, Optical Properties of Eu 2+ in α-sialon, J. Phys. Chem. B, (2004). 7. N. Hirosaki, R. -J. Xie, K. Kimoto, T. Sekiguchi, Y. Yamamoto, T. Suehiro, and M. Mitomo, Characterization and Properties of Green-emitting β-sialon:eu 2+ Powder Phosphors for White Light-emitting Diodes, Appl. Phys. Lett., (2005). 8. Y. Q. Li, J. E. J. van Steen, J. W. H. van Krevel, G. Botty, A. C. A. Delsing, F. J. DiSalvo, G. de With, and H. T. Hintzen, Luminescence Properties of Red-emitting M 2 Si 5 N 8 :Eu 2+ (M=Ca, Sr, Ba) LED Conversion Phosphors, J. Alloy Comp., (2006). 9. K. Uheda, N. Hirosaki, Y. Yamamoto, A. Naito, T. Nakajima, and H. Yamamoto, Luminescence Properties of a Red Phosphor, CaAlSiN 3 :Eu 2+, for White Light-emitting Diodes, Electrochem. Solid-State Lett., 9 [4] H22-H25 (2006). 10. R. -J. Xie and N. Hirosaki, Silicon-based Oxynitride and Nitride Phosphors for White LEDs - A Review, Sci. Tech. Adv. Mater., 8, (2007). 47«6y(2010)

6 508 Á zá Á Á 11. K. Sakuma, N. Hirosaki, R. -J. Xie, Y. Yamamoto, and T. Suehiro, Luminescence Properties of (Ca,Y)-α-SiAlON:Eu Phosphors, Mater. Lett., (2007). 12. R. -J. Xie, N. Hirosaki, H. -L. Li, Y. Q. Li, and M. Mitomo, Synthesis and Photoluminescence Properties of β-sialon:eu 2+ (Si 6-z :Eu 2+ ), J. Electrochem. Soc., 154 [10] J314-J319 (2007). 13. J. H. Ryu, Y. G. Park, H. S. Won, S. H. Kim, H. Suzuki, and C. Yoon, Luminescence Properties of Eu 2+ -doped β-si 6-z Microcrystals Fabricated by Gas Pressured Reaction, J. Crys. Growth, (2009). 14. P. Pettersson, Z. Shen, M. Johnsson, and M. Nygren, Thermal Shock Properties of β-sialon Ceramics, J. Eur. Ceram. Soc., 22, (2002). 15. T. Ekstrom, P. O. Kall, M. Nygren, and P. O. Olsson, Dense Single-phase β-sialon Ceramics by Glass-encapsulated Hot Isostatic Pressing, J. Mater. Sci., (1989). 16. C. L. Hewett, Y. B. Cheng, B. C. Muddle, and M. B. Trigg, Phase Relationships and Related Microstructural Observations in the Ca-Si-Al-O-N System, J. Am. Ceram. Soc., 81 [7] (1998). w wz

12.077~081(A12_이종국).fm

12.077~081(A12_이종국).fm J. of Advanced Engineering and Technology Vol. 1, No. 1 (2008) pp. 77-81 y w» e wx Á w œw Fabrication of Ceramic Batch Composition for Porcelain by Using Recycled Waste Ceramic Powder Hyun Guen Han, and

More information

14.fm

14.fm Journal of the Korean Ceramic Society Vol. 44, No. 2, pp. 93~97, 2007. Preparation of High Purity Si Powder by SHS Chang Yun Shin, Hyun Hong Min, Ki Seok Yun, and Chang Whan Won Engineering Research Center

More information

< DC1A4C3A5B5BFC7E22E666D>

< DC1A4C3A5B5BFC7E22E666D> ¼ (Jeong, Jung Chae)*, ý (Kim, Yoon Soo), (Shin, Woo Young), Þ Ñ (Park, Jong Man) ò ý ƒ Ð (Korea Evaluation Institute of Industrial Technology) (Shin, Jae-Heyg) Š æ (Ministry of Knowledge Economy) 1. :

More information

untitled

untitled [ ] œwz, 21«6y(2008) J. of the Korean Society for Heat Treatment, Vol. 21, No. 6, (2008) pp. 300~306 š y w p x*, **Á **Áy y* * ** w œ w œw, w» gœ Solid State Diffusion Brazing of the Aluminum Alloy Castings

More information

14.531~539(08-037).fm

14.531~539(08-037).fm G Journal of the Korea Concrete Institute Vol. 20, No. 4, pp. 531~539, August, 2008 š x y w m š gj p { sƒ z 1) * 1) w w Evaluation of Flexural Strength for Normal and High Strength Concrete with Hooked

More information

(163번 이희수).fm

(163번 이희수).fm Journal of the Korean Ceramic Society Vol. 48, No. 4, pp. 323~327, 2011. DOI:10.4191/KCERS.2011.48.4.323 Electrical Properties and Temperature Stability of Dysprosium and Erbium Co-doped Barium Titanate

More information

16(5)-06(58).fm

16(5)-06(58).fm Journal of Korean Powder Metallurgy Institute DOI: 10.4150/KPMI.2009.16.5.336 y-y w Sm-Fe w ƒ w zá *Á w»» The Effect of Excess Samarium Oxide on the PreparationG of Sm-Fe Alloy Powder by Reduction-diffusion

More information

10(3)-09.fm

10(3)-09.fm w y wz 10«3y 253~258 (2010.12.) Journal of Korean Society of Urban Environment ³ w Á» Á Á y w y œw (2010 11 22, 2010 12 9 k) Study on Determine of Detention Pond in Small Developed Area In-Soo Chang ½

More information

16(5)-04(61).fm

16(5)-04(61).fm Journal of Korean Powder Metallurgy Institute DOI: 10.4150/KPMI.2009.16.5.326 ƒ w Fe œ w Cu wy SPS (II) II. w SPS p ½ *Á½ Á½{ a Á½ š b w œw, a w» gœ, b y œ Production of Fe Amorphous Powders by Gas-Atomization

More information

93.fm

93.fm Journal of the Korean Ceramic Society Vol. 45, No. 10, pp. 625~630, 2008. Effect of Storage Conditions on the Setting Properties of Brushite Bone Cement Containing Granular β-tricalcium Phosphate Sun-Ae

More information

304.fm

304.fm Journal of the Korean Housing Association Vol. 20, No. 3, 2009 yw s w - û - A Study on the Planning of Improved-Hanok - Focused on Jeon-Nam Province - y* ** z*** **** Kang, Man-Ho Lee, Woo-Won Jeong, Hun

More information

3.fm

3.fm Journal of the Korean Ceramic Society Vol. 44, No. 1, pp. 12~17, 2007. A Study on the Preparation of Bone Ash and Celadon Bone Body Using Pig Bone Jae-Jin Jeong, Sang-Hee Lee, Yong-Seok Lee,* and Byung-Ha

More information

16(5)-03(56).fm

16(5)-03(56).fm Journal of Korean Powder Metallurgy Institute DOI: 10.4150/KPMI.2009.16.5.316 ƒ w Fe œ w Cu wy SPS (I) I. ƒ wy y Á xá½ Á½ *Á½{ a w œw, a w» gœ Production of Fe Amorphous Powders by Gas-atomization Process

More information

10(3)-10.fm

10(3)-10.fm w y wz 10«3y 259~264 (2010.12.) Journal of Korean Society of Urban Environment w gj p p y Á Á½k * w m œw Á* w y œw (2010 9 28, 2010 10 12 k) Characteristics of Antiwashout Underwater Concrete for Reduction

More information

( )-123.fm

( )-123.fm Journal of the Korean Ceramic Society Vol. 48, No. 1, pp. 63~68, 2011. DOI:10.4191/KCERS.2011.48.1.063 Effects of Substituting B 2 O 3 for P 2 O 5 on the Structure and Properties of SnO-P 2 O 5 Glass Systems

More information

50(4)-10.fm

50(4)-10.fm 2006, Vol. 50, No. 4 Printed in the Republic of Korea 칼코겐이도핑된망간산화물의저온합성연구 k Á z Á, *Áy, * y w ù w yw x ù l w» ww (2006. 7. 13 ) Chimie Douce Synthesis of Chalcogen-Doped Manganese Oxides Seung Tae Lim,GDae

More information

( )-94.fm

( )-94.fm Journal of the Korean Ceramic Society Vol. 47, No. 6, pp. 566~571, 2010. DOI:10.4191/KCERS.2010.47.6.566 Effect of Dispersion on Tape Casted Green Sheet Prepared from Bimodal-Type AlN Powders Hong-Soo

More information

10(3)-12.fm

10(3)-12.fm w y wz 10«3y 273~280 (2010.12.) Journal of Korean Society of Urban Environment p yá xá½k w y œw (2010 9 15, 2010 12 2 k) Analysis of Characteristics of Delivered Nonpoint Source Pollution at Forested Watershed

More information

50(1)-09.fm

50(1)-09.fm 2006, Vol. 50, No. 1 Printed in the Republic of Korea 언빨래가마르는현상에대한중등학교화학전공교사들의인식조사 ½x Á» Á½ # Á x* w w yw y š w w # w w (2005. 5. 11 ) A Research of Secondary School Chemistry Major Teachers Perceptions

More information

416.fm

416.fm Journal of the Korean Housing Association Vol. 20, No. 4, 2009 œ qp œ y An Analysis of Change on the Apartment Unit Plans and the Interior Spaces Related to Women * Choi, ByungSook ** Park, JungA "CTUSBDU

More information

4.fm

4.fm Journal of the Korean Ceramic Society Vol. 46, No. 1, pp. 30~34, 2009. Optimization of Glass Wafer Dicing Process using Sand Blast Won Seo, Young-mo Koo*, Jae-Woong Ko**, and Gusung Kim Department of Electronic

More information

19(1) 02.fm

19(1) 02.fm Korean J. Crystallography Vol. 19, No. 1, pp.7~13, 2008 Ÿ (ICISS) w š t w (2): t w y w œw Surface Structure Analysis of Solids by Impact Collision Ion Scattering Spectroscopy (2): Atomic Structure of Semiconductor

More information

605.fm

605.fm Journal of the Korean Housing Association Vol. 19, No. 6, 2008 y k y p w sƒ Care-giver s Needs and Evaluation on the Actual Condition of the Playgrounds in Child Care Facilities y* Choi, Mock-Wha x **

More information

10(3)-02.fm

10(3)-02.fm w y wz 10«3y 203~211 (2010.12.) Journal of Korean Society of Urban Environment w ù p yá k«áyw *Á xá½k w y œw Á* y w (2010 9 15, 2010 12 2 k) Characterization of Nonpoint Source Pollutant Loads from the

More information

82-01.fm

82-01.fm w y wz 8«( 2y) 57~61, 2005 J. of the Korean Society for Environmental Analysis p w w Á Á w w» y l Analysis of Influence Factors and Corrosion Characteristics of Water-pipe in Potable Water System Jae Seong

More information

75.fm

75.fm Journal of the Korean Ceramic Society Vol. 44, No. 8, pp. 451~456, 2007. A Study of Sintering Behavior and Crystallization in Li 2 O-Al 2 -SiO 2 (LAS) Glass System by RSM Kyu Ho Lee, Young Seok Kim, Young

More information

16(1)-3(국문)(p.40-45).fm

16(1)-3(국문)(p.40-45).fm w wz 16«1y Kor. J. Clin. Pharm., Vol. 16, No. 1. 2006 x w$btf3fqpsu'psn û w m w Department of Statistics, Chonnam National University Eunsik Park College of Natural Sciences, Chonnam National University

More information

fm

fm [ ] w wz DOI: 10.3740/MRSK.2009.19.12.692 Kor. J. Mater. Res. Vol. 19, No. 12 (2009) y INCONEL 718w Gas Tungsten Arc Welding» p sƒ ½»y Á *Á *Á y** ( ) d lj p wœq, *w wœ» q **( ) d lj p t Mechanical Properties

More information

( )32.fm

( )32.fm Journal of the Korean Ceramic Society Vol. 46, No. 3, pp. 317~3, 009. DOI:10.4191/KCERS.009.46.3.317 Fabrication and Optical Properties of Inorganic Electroluminescent Devices Jun-Young Lee and Jinha Hwang

More information

57.fm

57.fm Journal of the Korean Ceramic Society Vol. 45, No. 6, pp. 336~344, 2008. Rheological Properties of Cement Paste Blended Blast Furnace Slag or Fly Ash Powder Jong Taek Song, Hyo Sang Park, Seung Ho Byun,

More information

( )-113.fm

( )-113.fm Journal of the Korean Ceramic Society Vol. 46, No. 6, pp. 657~661, 009. DOI:10.4191/KCERS.009.46.6.657 Rheological Properties of Cement Pastes Blended Finex-Slag Powder Keun Jae Lee, Seung Ho Byun, and

More information

62.fm

62.fm Journal of the Korean Ceramic Society Vol. 45, No. 7, pp. 395~400, 2008. Preparation and its Characteristics of Fly Ash-based Geopolymeric Mortar using Low Grade Silica Waste Se Gu Son, Seung Yeob Hong,

More information

143.fm

143.fm Journal of the Korean Ceramic Society Vol. 43, No. 1, pp. 859~864, 006. FE Analysis of Alumina Green Body Density for Pressure Compaction Process Jong-In Im and Young-Jin Yook Simulation Center for Fine

More information

9(3)-4(p ).fm

9(3)-4(p ).fm w wz J. Kor. Soc. Cloth. Ind. 9«3y, 2007 Vol. 9, No. 3, pp.319-326(2007) w xk x p w q w Analysis of Foot Characteristics According to the Classification of Foot Types of Junior High School Girls Ji-Young

More information

12(2)-04.fm

12(2)-04.fm J. Korean. Soc. Living. Environ. Sys. Vol. 12, No. 2, pp 106~111(2005) w y y w z œ k üœ» p ½ Á Á Á ³ Á Á½Ÿ w w w, *g», ** w w Effects of Strategies to Improve Indoor Air Quality at Pre-occupancy Stage

More information

10.063~070(B04_윤성식).fm

10.063~070(B04_윤성식).fm J. of Advanced Engineering and Technology Vol. 1, No. 1 (2008) pp. 63-70 Mg-3%Al-1%Zn w ƒœ» y Á x*á **Á Á w œw *w s l I ûer ** t Effect of Thermomechanical Treatment on Microstructure and Mechanical Properties

More information

50(5)-07.fm

50(5)-07.fm Printed in the Republic of Korea w 3w yû x w w w Á x* w w w yw (2006. 3. 14 ) A research of the Difference in Teaching Styles and Understanding of 9 th Grade Students About Lead-iodide Precipitation Reaction

More information

DBPIA-NURIMEDIA

DBPIA-NURIMEDIA Printed in the Republic of Korea "/"-:5*$"- 4$*&/$& 5&$)/0-0(: Vol. 18, No. 5, 425-430, 2005» 677*4 Ÿ w sƒ ½»x Á Á½ k w y w, w y œw Some considerations for the analytical approaches to measure atmospheric

More information

18(3)-10(33).fm

18(3)-10(33).fm Journal of Korean Powder Metallurgy Institute Vol 18 No 3 011 DOI: 10150/KPMI01118383 e x 5Mg(OH) MgSO 3H O x w MgO NH OH w a báv y aá½xk aá½ aá½ cá½ bá½ a * aw» l bš w œw ck Effect of MgO and NH OH on

More information

untitled

untitled ª Œª Œ 27ƒ 2B Á 2007 3œ pp. 193 ~ 199 ª ƒ w d w ƒ sƒ Methodology of Drought Assessment Using National Groundwater Monitoring Network Data «x Á½ Kwon, Hyung JoongÁKim, Seong Joon Abstract The objective

More information

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 29, no. 10, Oct ,,. 0.5 %.., cm mm FR4 (ε r =4.4)

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 29, no. 10, Oct ,,. 0.5 %.., cm mm FR4 (ε r =4.4) THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2018 Oct.; 29(10), 799 804. http://dx.doi.org/10.5515/kjkiees.2018.29.10.799 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) Method

More information

16(2)-7(p ).fm

16(2)-7(p ).fm w wz 16«2y Kor. J. Clin. Pharm., Vol. 16, No. 2. 2006 ü t xy y w tœ ½ BÁ x BC B y w w w C y w w w Current Status and Expectations of Orphan Drugs in Korea -In point of supplying medicines for the rare

More information

( )-83.fm

( )-83.fm Journal of the Korean Ceramic Society Vol. 8, No. 1, pp. 0~5, 011. DOI:10.191/KCERS.011.8.1.00 Solidification of Heavy Metal Ions Using Magnesia-phosphate Cement HunG Choi, Hyun Ju Kang, Myung Shin Song,

More information

69-1(p.1-27).fm

69-1(p.1-27).fm 99 A 380 B 787 : wœ z w * w w wœ» A380 B787 wœ» w. wœ» ww r. w wœ» p j y w r» w. I. II. z III. A380 B787 IV. A380 V. wœ» : x VI. z VII. I. A380 B787»ƒ z wœ w, w w p j w w ƒ r. t wœ w ƒ w w wœ» š œm wš,

More information

49(6)-06.fm

49(6)-06.fm Journal of the Korean Chemical Society 2005, Vol. 49, No. 6 Printed in the Republic of Korea 중학교과학교과서불꽃반응실험에서선스펙트럼관찰의문제점분석및개선연구 ½ Á Á * w w yw (2005. 10. 4 ) An Analysis and Improvement of the Line Spectrum

More information

64.fm

64.fm Journal of the Korean Ceramic Society Vol. 44, No. 7, pp. 375~380, 2007. Tribological Properties of Carbon Layers Produced by High Temperature Chlorination in Comparison with DLC Coating Hyun-Ju Choi,

More information

82.fm

82.fm Journal of the Korean Ceramic Society Vol. 44, No. 9, pp. 524~528, 2007. Determination of Critical Chloride Content of Ordinary Portland Cement Concrete by Linear Polarization Technique Hong-Sam Kim, Hai-Moon

More information

( )-77.fm

( )-77.fm Journal of the Korean Ceramic Society Vol. 47, No. 5, pp. 407~411, 2010. DOI:10.4191/KCERS.2010.47.5.407 Physical Properties of ALC with Various Fineness of Quartzite Yong Sik Chu, Ui Jong Jung, Hun Song,

More information

한 fm

한 fm Journal of the Korean Magnetics Society, Volume 19, Number 6, December 2009 DOI: 10.4283/JKMS.2009.19.6.203 BaTi 0.5 Co 0.5 Fe 11 O 19 Mx r p Ka- q p ½ Á½ w, œw, w», 12, 361-763 (2009 8 4, 2009 9 10, 2009

More information

( )-84.fm

( )-84.fm Jurnal f the Krean Ceramic Sciety Vl. 7, N. 6, pp. 608~61, 010. DOI:10.191/KCERS.010.7.6.608 Synthesis and Characterizatin f Al-dped Uvarvite Green Pigments Sung-Gyu Se and Byung-Ha Lee Department f Materials

More information

12(3) 10.fm

12(3) 10.fm KIGAS Vol. 12, No. 3, September, 2008 (Journal of the Korean Institute of Gas) ü LP ƒ š Database w š Á Á½z w ywœw (2008 6 10, 2008 8 12 (1 ), 2008 9 5 (2 ), 2008 9 5 k) Constructing a Database Structure

More information

11(5)-12(09-10)p fm

11(5)-12(09-10)p fm w wz J. Kor. Soc. Cloth. Ind. 11«5y, 2009 Vol. 11, No. 5, pp.799-807(2009) w w * k ƒm w pg p w, ƒm w q w A Qualitative Research on Pursuing Image and Appearance Management Behavior of Brides Eun-Joo Bae

More information

15.101~109(174-하천방재).fm

15.101~109(174-하천방재).fm w wz 8«4y 2008 8 pp. 101 ~ 109 w» m -,, - A Study on Warnning Criteria Investigation of Automated Rainfall Warning System -Focused on Realationship of Water Level, Discharge and Precipitation - Á Á Á Ahn,

More information

07.051~058(345).fm

07.051~058(345).fm w wz 8«3y 2008 6 pp. 51 ~ 58 m qp yp š w k sƒ Evaluation of Dynamic Modulus based on Aged Asphalt Binder y*á **Á***Á**** Lee, Kwan-HoÁCho, Kyung-RaeÁLee, Byung-SikÁSong, Yong-Seon Abstract Development

More information

16(6)-06(08(77)).fm

16(6)-06(08(77)).fm Journal of Korean Powder Metallurgy Institute DOI: 104150/KPMI2009166416 š / g e w p» p a,b Á y b Áy x a, * a KAIST œw, b ( )» Interfacial Characteristics and Mechanical Properties of HPHT Sintered Diamond/SiC

More information

12(4) 10.fm

12(4) 10.fm KIGAS Vol. 12, No. 4, December, 2008 (Journal of the Korean Institute of Gas) l x CNG» v m s w ½ Á y w» œw (2008 9 30, 2008 12 10, 2008 12 10 k) Numerical Analysis for Temperature Distribution and Thermal

More information

10(1)-08.fm

10(1)-08.fm w y wz 10«( 1y) 47~52, 2007 J. of the Korean Society for Environmental Analysis œ w t y ½ xá Á x Á½ Á x* Ÿ œ, * w œw Optimization of Coagulation In The Conventional Water Treatment Plant Jun-Hyun Kim,

More information

( )-122.fm

( )-122.fm Journal of the Korean Ceramic Society Vol. 48 No. 1 pp. 40~45 2011. DOI:10.4191/KCERS.2011.48.1.040 Approach to Compositional Effect on Properties of Aspherical Optical Glass for GMP Process with Design

More information

03.fm

03.fm 29«6y (2009. 12) w œwz 257 š³ š p e ³ w y Á Á½ y *Á **Á y w» w w e lg Effects of Si and Mo on the Temperature-Dependent Properties of High Si High Mo Ductile Cast Irons Kyeong-Hwan Choe, Sang-Mok Lee,

More information

18(3)-09(34).fm

18(3)-09(34).fm Journal of Korean Powder Metallurgy Institute Vol 18 No 011 DOI: 104150/KPMI0111877 s WC-Co w g p w LiCoO w bá½ a* a cáv y aw» l bw» c w» l œw Synthesis of LiCoO Powders using Recycled Cobalt Precursors

More information

18211.fm

18211.fm J. of the Korean Sensors Society Vol. 18, No. 2 (2009) pp. 168 172 p k ù p p l xá xá ³ Á *Á w * Fabrication of the CNT-FET biosensors with a double-gate structure Byunghyun Cho, Byounghyun Lim, Jang-Kyoo

More information

fm

fm Journal of the Korean Ceramic Society Vol. 46, No. 2, pp. 219~22, 2009. Capacitance Aging Behavior of Acceptor-Doped BaTiO uer DC Electrical Field Dong Woo Hahn a Young Ho Han Department of Materials Engineering,

More information

<30332DB9E8B0E6BCAE2E666D>

<30332DB9E8B0E6BCAE2E666D> kœw» y w k p y w k» z wš ye z w mdkqvqrg üœ» y» Ÿ w kœwgeqgpikpggtkpiy glj GEQVGEJPQNQI[ œw w k w yz š y j œ w m w y ˆ mw y» kœ w k û ³ y ƒ ƒ» ƒ w œw w w y ƒƒ» k z w» %NGCP 9CVGT #EV wšw y ù» œ w w w t

More information

13.fm

13.fm Journal of the Korean Ceramic Society Vol. 46, No. 1, pp. 58~68, 2009. Rheological Properties of Ordinary Portland Cement - Blast Furnace Slag - Fly Ash Blends Containing Ground Fly Ash Hyo Sang Park,

More information

10.fm

10.fm Jurnal f the Krean Ceramic Sciety Vl., N. 1, pp. 53~57, 2009. Effect f MgB Additin n Synthesis f Hexagnal Brn Nitride Dae-Jin Lee*, **, Mi-Jung Jee*, Byung-Hyun Chi*, Mi-Jai Lee*, Nam-Hee Ch**, and Mi-Sun

More information

87.fm

87.fm Journal of the Korean Ceramic Society Vol. 44, No. 9, pp. 489~495, 2007. Physical Properties of Ultrafine Ash Blended Cement Dong-Woo Yoo, Seung-Ho Byun, and Jong-Taek Song Department of New Materials

More information

41(6)-09(김창일).fm

41(6)-09(김창일).fm 269 Ar v Na 0.5 K 0.5 NbO 3 t ½ t,, ½ w,, ½ w»œw Surface Reaction of Na 0.5 K 0.5 NbO 3 Thin Films in Inductively Coupled Ar Plasma w t œwz J. Kor. Inst. Surf. Eng. Vol. 41, No. 6, 2008. < > Dong-Pyo Kim,

More information

17.393~400(11-033).fm

17.393~400(11-033).fm Journal of the Korea Concrete Institute Vol. 23, No. 3, pp. 393~400, June, 2011 GGGGG DOI 10.4334/JKCI.2011.23.3.393 x RC { sƒ y y 1) *Á½ 1) Á 2) 1) y w œw 2) w œw Bond Strength Evaluation of RC Beams

More information

01.01~08(유왕진).fm

01.01~08(유왕진).fm JOURNAL OF KOREA SOCIETY OF PACKAGING SCIENCE & TECHNOLOGY. Vol. 14, No. 1 1~8 (2008) s w Á w» w Comparative Study on the Changes and Prospects of Flexible Food Packaging Design Kyung Soo Noh and Wang

More information

83.fm

83.fm Journal of the Korean Ceramic Society Vol. 44, No. 9, pp. 483~488, 2007. The Influence of on the Clinker Mineral Composition and Cement Quality Tae-Hyoung Eom, Won-Seok Kim, Chang-Bum Kim, Byeong-Yong

More information

[ ]-13.fm

[ ]-13.fm J. of the Korean Sensors Society Vol. 19, No. 2 (2010) pp. 155 159 0.96( p ½ Á Á Dielectric and piezoelectric properties of 0.96( lead-free ceramics Mi-Ro Kim, Seok-Jin Yoon, and Ji-Won Choi Abstract 0.96(

More information

17(1)-05.fm

17(1)-05.fm Krean J. Crystallgraphy Vl. 17, N. 1, pp.4~3, 006 ƒƒ Zn 3 j q p e w y Á k Áy w œw The Effect f Additin n the Micrwave Dielectric Prperties f Zn 3 Ceramics H Byung Yun, Tae-Kun Lee and Yen Hwang Department

More information

129.fm

129.fm Jurnal f the Krean Ceramic Sciety Vl. 45, N. 1, pp. 87~81, 008. Effects f Y O Additin n Densificatin and Thermal Cnductivity f AlN Ceramics During Spark Plasma Sintering Jae Hng Chae*, J Sek Park*, **,

More information

17.fm

17.fm Jurnal f the Krean Ceramic Sciety Vl. 44, N., pp. 110~115, 007. Micrwave Dielectric Prperties f BaNd - BaO-B -K O-SiO -xtio Glass Cmpsites Dng-Eun Kim,*, ** Sung-Min Lee,* Hyung-Tae Kim,* and Hyung-Sun

More information

15.fm

15.fm Journal of the Korean Ceramic Society Vol. 44, No. 2, pp. 98~102, 2007. Effect of Recycling Time on Stability of Colloidal Silica Slurry and Removal Rate in Silicon Wafer Polishing Eun-Suck Choi and So-Ik

More information

17(4)-04(41).fm

17(4)-04(41).fm Journal of Korean Powder Metallurgy Institute Vol. 17, No. 4, 2010 DOI: 10.4150/KPMI.2010.17.4.281 w k v ƒ Ÿ y Ÿ p sƒ Á a * w» l œw, a ( ) lj qj, ù t» Preparation of C Doped Photocatalyst Activating to

More information

07.045~051(D04_신상욱).fm

07.045~051(D04_신상욱).fm J. of Advanced Engineering and Technology Vol. 1, No. 1 (2008) pp. 45-51 f m s p» w Á xá zá Ÿ Á w m œw Image Retrieval Based on Gray Scale Histogram Refinement and Horizontal Edge Features Sang-Uk Shin,

More information

04-46(1)-06(조현태).fm

04-46(1)-06(조현태).fm w œwz, 46«1y 2009 Textile Science and Engineering Vol. 46, No. 1, 2009 ù 2'6 wx xk Á «w œ w» Áq œw k 1PG $CVJ1PG 5VGR &[GKPI H 0[NP2'6 5RNKV 6[RG /KETHKDGT *[GP 6CG %J CPF%JWN-YP2CTM &GRCTVOGPV H 1TICPKE

More information

<312D303128C1B6BAB4BFC1292E666D>

<312D303128C1B6BAB4BFC1292E666D> k Ÿy y y + ûz m Ì ˆw k Ÿ ø ky w y y» wk Ÿ v w k w w ƒ Ÿ ew k Ÿy yø k Ÿ ý k z» w ƒ w Ÿ y k y w x mw w w ³Ÿ wšy v mw y w r œw yÿ ý w z»ÿ Ÿ»» Ÿ ¾ Ÿ 6TCXGN 9GGMN[ ýw k Ÿ Ÿ ƒ š wš y w k Ÿ ƒ m ³ w w y y y 'EQVQWTKUO

More information

82-02.fm

82-02.fm w y wz 8«( 2y) 00~00, 2005 J. of the Korean Society for Environmental Analysis Calix[6]arene w k š w *Á x Á Á«ƒm w yw, *w w yw Cesium Ion Selective Solid Contact Electrodes Based on Calix[6]arene Won-sik

More information

( )34.fm

( )34.fm Jurnal f the Krean Ceramic Sciety Vl 46, N 3, pp 75~81, 009 DOI:104191/KCERS00946375 Prus Materials frm Waste Bttle Glasses by Hydrthermal Treatment Dng-kyu Lim and Eun-Tae Kang Schl f Nan & Advanced Material

More information

( )-103.fm

( )-103.fm Jurnal f the Krean Ceramic Sciety Vl. 46, N. 6, pp. 643~647, 2009. DOI:10.4191/KCERS.2009.46.6.643 Densificatin Behavir f C/C Cmpsite Derived frm Cal Tar Pitch with Small Amunt f Idine Additin Kwang Yun

More information

26(3D)-17.fm

26(3D)-17.fm 26ƒ 3D Á 2006 5œ pp. ~ ª y w qp yw k d Predictive Equation of Dynamic Modulus for Hot Mix Asphalt with Granite Aggregates yá½x Á Lee, Kwan-HoÁKim, Hyun-OÁJang, Min-Seok Abstract The presented work provided

More information

( )-53.fm

( )-53.fm Journal of the Korean Ceramic Society Vol. 47, No. 4, pp. 76~8, 010. DOI:10.4191/KCERS.010.47.4.76 Adhesion Characteristic and Porosity Change of Alkali Silicate Impregnant of Concrete Hun Song, Yong Sik

More information

50(6)-09.fm

50(6)-09.fm Journal of the Korean Chemical Society 6, Vol. 5, No. 6 Printed in the Republic of Korea w Polyacrylamide y ½ û * w yw (6. 9. 1 Thixotropic Properties of Polyacrylamide Hydrogels with Various Synthetic

More information

32(4B)-04(7455).fm

32(4B)-04(7455).fm 32«4ByÁ 2012 7 pp. 233 ~ 242 œ w w w y œ r Estimation of Domestic Water Supply Benefit Using Demand Function Approach ³ Á Á½¼yÁ Yeo, Kyu DongÁYi, Choong SungÁKim, Gil HoÁLee, Sang Won Abstract In the past,

More information

fm

fm w y wz 9«( 1y) 34~40, 2006 J. f the Krean Sciety fr Envirnmental Analysis V/ w y Áy yá váy * w» ( )», *» w y œw Simultaneus Remval f Dixin and Nitrgen Oxide n V/ Catalyst Jun-Yub Lee, Sung-H Hng, Sung-Pill

More information

fm

fm Journal of the Korea Concrete Institute Vol. 24, No. 1, pp. 079~086, February, 2012 GGGGG http://dx.doi.org/10.4334/jkci.2012.24.1.079 섬유보강콘크리트에묻힌 GFRP 보강근의부착거동에대한섬유영향평가 1) Á½ 1) Á 2) Á 1) * 1) ³ w y lœw

More information

DBPIA-NURIMEDIA

DBPIA-NURIMEDIA Printed in the Republic of Korea "/"-:5*$"- 4$*&/$& 5&$)/0-0(: Vol. 18, No. 5, 436-443, 2005,1"$ w Q) t p z Á 1w w œw 2 w œ yw Effects of surface properties and solution ph on the pollutants removal of

More information

( )45.fm

( )45.fm Journal of the Korean Ceramic Society Vol. 46, No. 3, pp. 295~300, 2009. DOI:10.4191/KCERS.2009.46.3.295 Analysis of Oxide Coatings Formed on Al1050 Alloy by Plasma Electrolytic Oxidation Bae-Yeon Kim,

More information

( )-44.fm

( )-44.fm Journal of the Korean Ceramic Society Vol 47, No, pp 6~67, 010 DOI:104191/KCERS010476 The Properties and Uniformity Change of Amorphous SiC:H Film Deposited using Remote PECVD System with Various Deposition

More information

14(2) 02.fm

14(2) 02.fm J. Korean. Soc. Living. Environ. Sys. Vol. 14, No. 2, pp 117~125(2007) w y y w z sm Ÿ š w œ l ³Á½ * w, **w w w Impact of Photosensor Sensitivity on the Control Performance of a Daylight Dimming System

More information

( )-85.fm

( )-85.fm Journal of the Korean Ceramic Society Vol. 48, No. 1, pp. 1~5, 011. DOI:10.4191/KCERS.011.48.1.001 Synthesis of SiC Nano-powder from TEOS by RF Induction Thermal Plasma Sang-Min Ko*, **, Sang-Man Koo**,

More information

(159번 어혜진).fm

(159번 어혜진).fm Journal of the Korean Ceramic Society Vol. 48, No. 4, pp. 298~302, 2011. DOI:10.4191/KCERS.2011.48.4.298 Synthesis of Cr-doped Pyrochlore-type Pigments and Coloring in Glazes Hye-Jin Eo and Byung-Ha Lee

More information

CERIUM OXIDE Code CeO CeO 2-035A CeO 2-035B CeO REO % CeO 2 /REO % La 2 O 3 /REO %

CERIUM OXIDE Code CeO CeO 2-035A CeO 2-035B CeO REO % CeO 2 /REO % La 2 O 3 /REO % 희토류 SPEC CERIUM OXIDE Code CeO 2-040 CeO 2-035A CeO 2-035B CeO 2-025 REO % 99 99 98 97.5 CeO 2 /REO % 99.99 99.98 99.95 99.50 La 2 O 3 /REO % 0.004 0.01 0.03 0.1 0.01 (1) Pr 6 O 11 /REO % 0.003 0.004 0.015

More information

17(1)-06.fm

17(1)-06.fm Krean J. Crystallgraphy Vl., N. 1, pp.14~18, 006 LP-MOCVD w ZnO ù Ÿw p Á yá * w w» w» l Structural and Optical Prperties f ZnO Nanwires Synthesized by LP-MOCVD Prcess Yung-Jin Chi, Jae-Hwan Park and Jae-Gwan

More information

18103.fm

18103.fm J. of the Korean Sensors Society Vol. 18, No. 1 (009) pp. 8 3 VO w PCM yá Á Á Ÿ Built-in protection circuit module by using VO temperature sensors K. H. Song, J. B. Choi, M. W. Son, and K. S. Yoo Abstract

More information

27(5A)-07(5806).fm

27(5A)-07(5806).fm ª Œª Œ 27ƒ 5A Á 2007 9œ pp. 753 ~ 758 gj pœw gj p { x A New Test Method for Pure Isotropic Flexural Tensile Strength of Concretes Ÿ Á y Á x Zi, GoangseupÁOh, HongseobÁChoi, Jinhyek Abstract Proposed is

More information

fm

fm [ ] w wz Kor. J. Mater. Res. Vol. 17, No. 3 (2007) Sn-3.0 Ag-0.5 Cu/OSP 무연솔더접합계면의접합강도변화에따른전자부품열충격싸이클최적화 y Á½{ *Á Á½Ÿ * t sƒ l *w wœ w wœ œw Thermal Shock Cycles Optimization of Sn-3.0 Ag-0.5 Cu/OSP Solder

More information

202.fm

202.fm Journal of the Korean Housing Association Vol. 19, No. 2, 2008 w w w w Physical Identities of Bukchon Hanok Area Viewed from Literary Geography * Park, Cheol-Soo "CTUSBDU This study explores the beneficial

More information