[ ]-13.fm

Size: px
Start display at page:

Download "[ ]-13.fm"

Transcription

1 J. of the Korean Sensors Society Vol. 19, No. 2 (2010) pp ( 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( lead free piezoelectric ceramics were synthesized to enhance the piezoelectric properties of (Na,K. The systhesis and sintering method were the conventional solid state reaction method and general sintering method in air atmosphere. The polymorphic phase transition(ppt) was observed at all composition(0 x 0.05) when (Ba (1-x) were added in the (. As Sr concentration was increased, grain size, dielectric loss(tanδ) and mechanical quality factor(q m ) were decreased and piezoelectric constant(d 33 ) and electromechanical coupling factor(k p ) were increased within a limited value. The optimized piezoelectric and properties, d 33, k p, Q m, and tand, of 0.96( were 139 pc/n, 0.31 %, 95, 0.04 at the composition of x=0.04. Key Words : piezoelectric properties, lead-free, NKN, BST 1. Pb(Zr,Ti)O 3 (PZT) x ƒ w p ƒ q,», d l, vl, l š [1-4]. ù, w PZT Pbƒ 60 wt% sw» y, d ƒ š. RoHS ³ w Pb sww w ƒ y w š [5,6]. x l l x, x, r e px, BaTiO 3x š [7-9]. (Bi,Na (BNT) w ƒ ù, w w» l(korea Institute of Science and Technology) Corresponding author : jwchoi@kist.re.kr (Received : January 8, 2010, Revised : March 9, 2010 Accepted : March 24, 2010) ƒ 200 w w p ƒ ù ƒ 300 o C w û ùküš. r e p ƒ (Na,K (NKN) 80~100 û ƒ ù (420 o C) p ùküš x w j ƒ y w š [10,11]. ù NKN 1140 o C w e {» w w w w» ƒ š. û (Na,K ƒ j» w Hot proessing, Hot forging, RTGG(reactive template grain growth), SPS(spark plasma sintering), ƒ mw š w ƒ š [13,14], w r œ wš x yw ƒ š ƒ w ƒ š. wù (Na,K š g 155

2 90 ½ Á Á w p w w t š [15,16]. NKN BaTiO 3 š g y w, SrTiO 3 š g û y w. BaTiO 3, û ƒ ùkü SrTiO 3 r e p w NKN š g 0.96( (Ba (1-x) y yw w p w j š w. 2. x 2.1. r x x š r w. 0.96( K 2 CO 3 (99.9 %), Na 2 CO 3 (99.5 %), Nb 2 O 5 (99.9 %), BaCO 3 (99 %), SrCO 3 (99.9 %), TiO 2 (99.8 %) w, x=0, 0.03, 0.04, 0.05 mol y. yw 10-4 g¾ s w, k g w 24 yw w. yw w 100 o C 24 w z, ù ƒ š 950 o C 3 w w. w q 72 yw,, w z, PVA 5 wt% ƒwš 150 mesh w, 18 mm x w 100 MPa ƒw xw. x r 600 o C 2 burn-out w š, 1075 o C 2 w. r» p d w» w Ì 1mm w, Ag sw 650 o C 15 w. x r 120 o C g 1 DC 3.5 kv/mm ƒw w d r ƒƒ SEM(S-3000H, hitachi, japan) XRD(Dy 983, philips, netherlands) mw w. w, Impedance Analyzer(agilent 4294), œ œ q œ w d w»» w (k P )» t (Q m ) w š, d 33 meter(channel product Fig. 1. Bulk density of 0.96( as a function of molar ratio of Ba and Sr. Fig. 2. XRD patterns of 0.96( as a function of molar ratio of Ba and Sr: (a) NKN, (b) x=0, (c) x=0.03, (d) x=0.04, (e) x=0.05. DT-3300) d w. 3. š Fig. 1 Ba Sr 0.96( ) NbO 3 r ù kü. Sr sw 4.28 g/cm 2 ƒ, 5 mol%ƒ š 4.24 g/cm 2 yƒ. ù, BST š g NKN j w y w. Fig. 2 X z 2 w, y wz 19«2y,

3 0.96(Na0.5K0.5)NbO3-0.04(Ba(1-x)Srx)TiO3 Fig. 3. SEM images 0.96(Na0.5K0.5)NbO3-0.04(Ba(1-x)Srx) TiO3 as a function of molar ratio of Ba and Sr: (a) x=0, (b) x=0.03, (c) x=0.04, (d) x=0.05. 함에 따라 회절 피크의 이동 없이 페로브스 카이트 구 조의 NKN-BST 단일상을 나타 나타내는 것을 확인 할 수 있었다. NKN만의 X선 회절(a)와 BST가 고용된 피 크들을 비교해보면 (002)와 (200) 피크의 변화를 확인 할 수 있다. 이는 (Na0.5K0.5)NbO3에 (Ba0.95Sr0.05)TiO3의 양을 변화 시켜 고용시킨 본 연구그룹의 보고[17]에서 알 수 있듯이 순수한 NKN은 orthorhombic 구조를 가지고 있으며 BST의 고용량이 0.03~0.05 mol일때 orthorhombic과 tetragonal 구조가 공존하는 polymorphic phase transition (PPT) 영역을 가지므로 본 연구에서 BST의 고용량이 0.04 mol로 PPT 영역에 있으므로 Sr의 조성이 0~ 0.05 mol의 범위에서 변화했지만 모두 PPT 영역에 있 는 것을 알 수 있다. Fig. 3은 Sr의 고용량에 따른 0.96(Na0.5K0.5) NbO30.04(Ba(1-x)Srx)TiO3의 분말을 1075 oc에서 2시간 동안 소결한 시편의 미세구조를 관찰 한 것이다. Sr의 고용 량이 증가함에 따라 입자의 크기가 감소함을 알 수 있 으며 이는 SrTiO3의 소결온도가 BaTiO3에 비해 다소 높기 때문에 나타나는 현상으로 판단된다. Fig. 4는 Sr의 고용량에 따른 0.96(Na0.5K0.5)NbO30.04(Ba(1-x)Srx)TiO3 세라믹스의 유전손실을 나타낸 것 이다. Sr의 고용량이 증가함에 따라 유전손실이 서서히 감소했는데, 이는 상유전체인 SrTiO3가 강유전체인 BaTiO3에 비해 낮은 유전손실 값을 갖기 때문에 Sr의 고용량이 증가함에 따라 유전손실이 감소한 것으로 판 단된다. Fig. 5는 Sr의 고용량에 따른 0.96(Na0.5K0.5) NbO30.04(Ba(1-x)Srx)TiO3의 전기기계 결합계수 (kp)와 기계 무연 세라믹스의 유전 및 압전 특성 Fig. 4. Fig Dielectric loss of 0.96(Na0.5K0.5)NbO3-0.04(Ba(1-x) Srx)TiO3 as a function of molar ratio of Ba and Sr. kp and Qm of 0.96(Na0.5K0.5)NbO3-0.04(Ba(1-x)Srx) TiO3 as a function of molar ratio of Ba and Sr. 적 품질계수(Qm)을 나타낸 것이다. 전기기계결합계수 의 경우 Sr이 고용되지 않은 경우 약 24 %의 값을 가 졌으며 Sr의 고용량이 증가됨에 따라 향상된 값을 갖 는 것을 알 수 었고 0.04 mol에서 최대값인 약 31 %를 갖는 것을 확인 할 수 있었으나 0.04 mol 이상 고용되 면 감소하는 경향을 나타내었다. 기계적 품질계수의 경 우 전기기계 결합계수와 반대의 경향을 나타내고 있으 며 Sr이 고용되지 않았을 때 최대값인 156을 나타내었 으며, Sr의 고용량이 증가함에 따라 감소하는 것을 확 인 할 수 있었다. Fig. 6은 Sr 고용에 따른 0.96(Na0.5K0.5) NbO (Ba(1-x)Srx)TiO3의 압전상수(d33) 값을 나타낸 것이다. d33의 경우 전기기계 결합계수와 일치하는 특성을 나타 내었다. Sr이 고용되지 않은 경우 108 pc/n의 값을 나 타내었고 Sr의 고용량이 증가함에 따라 d33값 역시 증 가하는 것을 알 수 있었고, Fig. 2에 나타냈듯이 PPT 157 J. Kor. Sensors Soc., Vol. 19, No. 2, 2010

4 92 ½ Á Á Fig. 6. Piezoelectric constant of 0.96( ) NbO (Ba (1-x) as a function of molar ratio of Ba and Sr. 4mol% 139 pc/n y w 4mol% š w. w BST š g NKN (80~100 pc/n) w y w ( ) TiO 3 (x=0, 0.03, 0.04, 0.05) š w w, Sr š ƒ r, p w NKN BST š g p w y w. w Sr š ƒw,»» w ƒw š w y w, 0.04 mol 139 pc/n,»» w 0.31 %,» t 95, w w»»» w w. š x [1] W. R. Cook and J. Jaffe, Piezoelectric Ceramics, Academic Press, New York, p.135, [2] E. Jaffe, R. S. Roth, and S. Marzullo, Piezoelectric properties of lead zirconate-lead titanate solid-solution ceramics, J. Appl. Phys, vol. 25, pp , [3] ³, x, ½,,,, j» s 0.01 Pb(Mg 1/2 W 1/2 )O Pb (Ni 1/3 Nb 2/3 )O PbTiO PbZrO 3 z p, wz, 17«, 6y, pp , [4], y, ½w,, Ÿ, d l PSN-PZT p e MnO 2 z, wz, 16«, 2y, pp , [5] R. E. Jaeger and L. Egerton, Hot pressing of potassium-sodium niobate ceramics, J. Am. Ceram. Soc., vol. 45, pp , [6] G. H. Haertling, Properties of hot-pressed ferroelectric alkali niobate ceramics, J. Am. Ceram. Soc., vol. 50, pp , [7] k,, w ƒ BaTiO 3 k P œ p e w, w wz, 23«, 6y, pp , [8] L. B. Kong, J. Ma, W. ZhuS and O. K. Tan, Preparation of Bi 4 Ti 13 O 12 ceramics via a high energy ball milling process, Mater. Lett., vol. 51, pp , [9] Z. Chen and J. Hu, Piezoelectric and dielectric properties of Li x (K ) 1-x Nb 0.86 Ta 0.1 Sb 0.04 O 3 lead-free ceramics, Trans. Meter. Soc., vol. 18, pp , [10] H. Du, F. Tang, Z. Li, W. Zhou, S. Qu, and Z. Pie, Effect of poling condition on piezoelectric properties of ( ceramics, T. N. Meter. Soc., vol. 16, pp , [11] H. Birol, D. Damjanovic, and N. Setter, Preparation and characterization of ( ceramics, J. Euro. Cera. Soc., Vol. 25, Iss. 10, pp , [12] S. H. Park, C. W. Ahn, S. Nahm, and J. S. Song, Microstructrue and piezoelectric properties of ZnO-added ( ceramics, Jpn. J. Appl. Phys., vol 43, no. 8B, pp. L , [13] R. Wang, R. Xie, T. Sekiya, and Y. Shimoyo, Fabrication and characterization of potassium sodium niobate piezoelectric ceramics by spark plasma sintering method, Materials Research Bulletin, vol. 39, pp , [14] Y. Saito, H. Takao, T. Tani, T. Nonoyama, K. Takatori T. Homma T. Nagaya, and M. Nakamura, wz 19«2y,

5 0.96( p 93 Lead-free piezoceramics, Nature, vol , pp , [15] Y. Guo, K. I. Kakimoto, and H. Ohsato, Structure and Electrical Properties of Lead-free ( ) NbO 3 -BaTiO 3 ceramics, Jpn. J. appl. Phys, vol. 43, no. 9B, pp , 2004 [16] H. Y. Park, C. W. Ahn, H. C. Song, J. H. Lee, and S. Nahm, Microstructure and piezoelectric properties of 0.95( BaTiO 3 ceramics, Appl. Phys. Lett, vol. 89, pp , 2006 [17] M. R. Kim, H. C. Song, J. W. Choi, Y. S. Cho, H. J. Kim, and S. J Yoon, Synthesis and piezoelectric properties of (1-x)( ) NbO 3 -x(ba 0.95 Sr 0.05 ceramics, J. Electroceram, vol. 23, pp , ½ 2006 w œ w œw (œw ) 2009 w w œw : 1983 w œ w»œw (œw ) 1985 w w»œw 1992 w w»œw 1988 ~x KIST l 2004 Pennsylvania State Univ. Visiting Prof. : d l, š q 1989 w œ w œw (œw ) 1994 w w œw 2002 w w œw 1994 ~x KIST l 2004 ~2005 Cornell Univ. Post-doc. :, y 159 J. Kor. Sensors Soc., Vol. 19, No. 2, 2010

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

58.fm

58.fm Jurnal f the Krean Ceramic Sciety Vl. 4, N. 6, pp. 6~67, 008. Effects f High Energy Ball Milling n the Piezelectric Prperties f Lead-free (K 0.44 Ceramics Yung-Hyek Kim, Dae-Yung He, Wen-Pil Tai, and Jae-Shin

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

< 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

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

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

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

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

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

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

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

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

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

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

44.fm

44.fm Jurnal f the Krean Ceramic Sciety Vl. 45, N. 5, pp. 263~267, 2008. Piezelectric Prperties and Phase Transitin behavirs f (Bi 1/2 ) 1 x Ca x Ceramics Yng-Hyun Lee*, **, Jeng-H Ch**, Byung-Ik Kim**, and

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

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

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

歯김유성.PDF

歯김유성.PDF BIT/ST/LSCO/MgO Variations of Microstructures and Electrical Properties of BIT/ST/LSCO/MgO Epitaxial Films by Annealing 2003 2 BIT/ST/LSCO/MgO Variations of Microstructures and Electrical Properties of

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

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

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

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

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

( )-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

( )-101.fm

( )-101.fm Journal of the Korean Ceramic Society Vol. 47, No. 6, pp. 503~508, 2010. DOI:10.4191/KCERS.2010.47.6.503 The High Density Sintering of Green-emitting -SiAlON:Eu Ceramic Plate Phosphor Young-Jo Park, Sung-Hoon

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

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

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

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

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

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

( )-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

fm

fm Journal of the Korean Ceramic Society Vol. 46, No. 2, pp. 137~145, 2009. Preparation of Ultrafine Barium Titanate Powder by Slurry Spray Pyrolysis Jong Ho Lee, Kang Heon Hur, and Jung Soo Lee LCR Division,

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

( )-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

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

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

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

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

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

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

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

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

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

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

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

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

( )-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

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

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

48.fm

48.fm Jurnal f the Krean Ceramic Sciety Vl. 44, N. 5, pp. 60~65, 007. Develpment f Black Clr Spinel Pigment fr High Temperature Kwang-H Lee, Min-S Myung, and Byung-Ha Lee Department f Ceramic Engineering, Myungji

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

( )-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

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

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

54.fm

54.fm Journal of the Korean Ceramic Society Vol. 44, No. 6, pp. 308~31, 007. A Study on the Magnetoelectric Effect in Lanthanum Modified BiFe -PbTi Ceramics Eun Gu Lee, Sun Jae Kim,* and Jae Gab Lee** Department

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

85.fm

85.fm Jurnal f the Krean Ceramic Sciety Vl. 44, N. 9, pp. 502~509, 2007. Examinatin n Applicatin f High-Perfrmance Cncrete using Fine Fly Ash as Replacement Material f Silica Fume Bum-Sik Lee, Sang-Kyu Kim,

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

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

<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

7.fm

7.fm Jurnal f the Krean Ceramic Sciety Vl. 45, N. 1, pp. 60~64, 008. Sintering Behavir and Mechanical Prperty f B 4 C Ceramics Fabricated by Spark Plasma Sintering Kyung Hun Kim*,, Jae Hng Chae*, J Sek 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

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

06ƯÁý

06ƯÁý /..... 1) 2012, /.,. 1.1% (2010).,..,......, 1%.., (HEV), (EV). 2-4),,., 90 [(BH) max]60.,. Fig. 1. N48 Nd-Fe-B 50 Alnico 9 1/54., Nd-Fe-B. HEV, EV,,... Dy Fig. 2. 5-7) Dy, Fig. 1.. Fig. 2....,,.,. Nd-Fe-B

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

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

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

( )-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

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

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

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

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

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

6.fm

6.fm Jurnal f the Krean Ceramic Sciety Vl. 45, N. 1, pp. 54~59, 2008. Expansin Characteristics f the Hydrated Sdium Silicate Yang Py Kng, H Yen Ch, and Dng S Suhr Department f Materials Science and Engineering,

More information

20(1) fm

20(1) fm Krean J. Crystallgraphy Vl. 20, N. 1, pp.1~8, 2009 Ÿ (ICISS) w š t w (3): t w y w œw Surface Structure Analysis f Slids by Impact Cllisin In Scattering Spectrscpy (3): Surface Structure f Ceramics Yen

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

00....

00.... Fig. 1 2.5%. 51.5%, 46.0%,.. /, Table 1 (U.V.; Ultraviolet 10-400 nm)/ (NIR; Near Infrared 700 nm - 5 µm) ( TiO 2, WO 3, ZnO, CeO, ATO, Sb 2O 3-ZnO, ITO.) (400 nm - 780 nm). /. Fig. 1.. 23 Table 1. / /

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

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

jaeryomading review.pdf

jaeryomading review.pdf 4 5 6 7 8 9 10 11 12 13 1. S. Kim, H. Y. Jeong, S. K. Kim, S. Y. Choi and K. J. Lee, Nano Lett. 11, 5438 (2011). 2. E. Menard, K. J. Lee, D. Y. Khang, R. G. Nuzzo and J. A. Rogers, Appl. Phys. Lett. 84,

More information

14(4) 09.fm

14(4) 09.fm J. Korean. Soc. Living. Environ. Sys. Vol. 14, No. 4, pp 343~350(2007) w y y w z 14 «4 y 2007 yw» l s p»xá ³ *w w w œw, **w w w The Property of Pressure Distribution of Hybrid Underfloor Air Distribution

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

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

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

( )-68.fm

( )-68.fm Jurnal f the Krean Ceramic Sciety Vl. 47, N. 5, pp. 445~449, 010. DOI:10.4191/KCERS.010.47.5.445 Blating Mechanism f Artificial Lightweight Aggregate fr Recycling the Waste Glass Shin Hyu Kang and Ki Gang

More information

139.fm

139.fm Jurnal f the Krean Ceramic Sciety Vl. 43, N. 12, pp. 839~845, 2006. Manufacture f High Density Graphite Using Cal Tar Pitch Kwang Yun Ch, Kyung Ja Kim, Dh Hyung Riu, Kwang Hyun Lim,* Jung Il Kim,* In Chel

More information

35.fm

35.fm Jurnal f the Krean Ceramic Sciety Vl. 45, N. 4, pp. 208~213, 2008. Develpment f Helical Antenna using Micrwave ZST Ceramics Jng-Bae Lee, Yungjin Yk, H-Yng Sin, Hyung-Sun Kim*, Jng-In Im Simulatin Center,

More information

105.fm

105.fm Journal of the Korean Ceramic Society Vol., No. 11, pp. 633~638, 007. Resistance of Alkali Activated Slag Cement Mortar to Sulfuric Acid Attack Kyung-San Min, Seung-Heun Lee Department of Material Science

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

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

38(6)-01.fm

38(6)-01.fm y, 38«, 6y, 699-705, 2005 Econ. Environ. Geol., 38(6), 699-705, 2005 t sÿ y xk 1 Á s 2Á z 1 Á½ 1 Á e 3 1 w y w,» w, 2w y w, 3š w y w Chemical Speciation of Heavy Metals in Geologic Environments on the

More information

w w l v e p ƒ ü x mw sƒw. ü w v e p p ƒ w ƒ w š (½kz, 2005; ½xy, 2007). ù w l w gv ¾ y w ww.» w v e p p ƒ(½kz, 2008a; ½kz, 2008b) gv w x w x, w mw gv

w w l v e p ƒ ü x mw sƒw. ü w v e p p ƒ w ƒ w š (½kz, 2005; ½xy, 2007). ù w l w gv ¾ y w ww.» w v e p p ƒ(½kz, 2008a; ½kz, 2008b) gv w x w x, w mw gv ª Œª Œ 30ƒ 5A Á 2010 9œ pp. 475 ~ 484 gj p ª v e p p PSC ƒ gv : II. x w Precast Concrete Copings for Precast Segmental PSC Bridge Columns : II. Experiments and Analyses ½kzÁ½ Á zá x Kim, Tae-HoonÁKim,

More information

51(4)-13.fm

51(4)-13.fm Journal of the Korean Chemical Society 2007, Vol. 51, No. 4 Printed in the Republic of Korea w x - w y *Á š w w w yw (2007. 3. 28 ) Case Study on Verbal Interactions of Teacher-Small Group StudentsG in

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

(1)-01(정용식).fm

(1)-01(정용식).fm Textile Science and Engineering Vl. 48, N. 1, 2011 ƒ s j p y ky w xá½ Á½» 1 Á w œ w lœw, 1 w» w (2010. 12. 10. /2011. 1. 16. k) Analysis f Stabilizatin and Carbnizatin Behavirs f Ply(acrylnitrile) Fibers

More information