17(1)-05.fm

Size: px
Start display at page:

Download "17(1)-05.fm"

Transcription

1 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 f Materials Science & Engineering, Seul Natinal University f Technlgy, Seul , Krea Zn 3 ƒw w š q p y w C w w Zn 3 w w š, ƒw w Zn 3 mle% ƒ ƒ 95% p y w. p mle ratiƒ ~4% r ε r 1 ƒ y w š, t 900 C w mle% r QÜf=40,000 ùkü. 900 C wš 1 mle% ƒw 0 ƒ¾ T cf = 54 ppm/ C ùkü š, T cf = 60~ 80 ppm/ C ùkü. Abstract The micrwave dielectric prperties f Zn 3 with additin were investigated. The additin f enhanced the sinterability f Zn 3, which resulted in high density f Zn 3 ceramic greater than 95% f the theretical value when sintered at 900 C fr 4 hurs. X-ray diffractin analysis f sintered Zn 3 ceramic shwed n secnd phase with additin. Dielectric permittivity (ε r ) and quality factr (Q f) varied with bth density at different sintering temperature and additin. Dielectric permittivity, quality factr and temperature cefficient (T cf ) f the tw mle f added Zn 3 that was sintered at 900 C were 1.4, 40,000, 54 ppm/ C, respectively. 1. m» wì v w y p w q j q (300 MHz~300 GHz) y k m m w ƒ y w š. w» w» w wš š,» j q t š»,, ƒ š.»q» w t j» t y xw (Lw Temperature C-fired Ceramic; LTCC)» š. 1) x ¾ LTCC» ¼ š e w š»q w ù j q w LTCC s d d dw 3 w t 4

2 17«1y, 006 ƒƒ Zn 3 j q p e w 5 xy» y. LTCC»» ful CPUù SAWvl qj HTCC(High Temperature C-fired Ceramic, š ) w, š Ag, Cu ü z w» w 900 C w x, ƒ w» j ƒ š.» ƒ ƒ w Agù Cu w š q j t. w LTCC» w ü ƒ w w(r), l(l), eq l (C) y»qü x w ƒ w, Si w q ƒ Si mw w ƒ š w m t w» š.,3) x ¾ j q ƒ vlù œ» BaO-Ln O 3 -TiO (Ln=La, Sm, Nd), 4-9) (Zr,Sn)TiO 4, 10) BaO-TiO, 11-13) cmplex pervskite, (Mg,Ca)TiO 3 14) ù ƒ 1300 C w Ag, Cu š ƒ š. û» š p 15-17) ƒw z w j q p w j š. w wš š š, š ƒ ƒ w w ƒ ƒw w Zn 3 w y» p xwš w. LTCC w Tsai, 18) ZnO 0.5~ mle% ƒw x p ƒ l w w w,» ZnO- œ yw, ZnO jš w w e w j š w. w ZnO 1mle% ƒw 890 C ZnO- œ Zn 3 (VO 4 ) ƒ 900 C r w e yƒ. j q w zinc nibate w w ƒ CuO w šƒ, Kim 19) Zn O 6 w CuO ƒw 1150 ~900 C w QÜ F=59,500, ε r =.1, τ cf = 66 ppm/ C šw (τ f )ƒ ƒ ƒ CuOƒ (ZnCu )» š šw š 0), Lee Zn 3 w ƒw 900 C, 1000 C, 1100 C xw p QÜ F=67,500, ε r =.4 šw ù p τ f w. Zn 3 ZnO w š w z 0.5, 1,, 3, 4, 5 mle% ƒw LTCC 900 C w 950 C, 1000 C w,» p q (τ cf ) sww (ε r ), t (QÜF) d wì y sƒwš, ƒ š w.. x -1. Zn % ZnO w 3 1 w alumina ball, ethyl alchle, plyprpylene bttle w 6 w, w 1100 C, h ù ƒ w» w w. w Zn 3 w z alumina ball, ethyl alchle, plyprpylene bttle w 5 milling w š, 10 C w. 99.9% w z w Zn 3 ƒw š ƒ 0, 0.5, 1,, 3, 4, 5%

3 6 y Á k Áy w wz w w 3 d w (1) w. Fig. 1. Schematic diagram f sample preparatin and analysis. ƒw. Zn 3 yw alumina ball, plyprpylene bttle w yww. Zn 3 yw 3wt% PVA yww 10 mm 5mm w kgf/cm xw. x r 900, 950, 1000 C» 4 w. x Fig. 1 ù kü. -. d r w r x w k X- z» (Rigaku) z ƒ θ=0~80, e =5 /min, step=0.0 d w. X- 30 kv, 30 ma w. p d j l w» xk r d w w š, z r water immersin technique(astm STD(373-7)) d w. r 3 k z W dry Dapp= W sat W ρ water wet (1)» W dry, W sat w, W dry, ρ water d w ( ). j q d w r t SIC (#800~#000) w w Ì 1:0.45~ 0.5) w. j q ε r Hakki-Clemann w sx q (pst resnatr methd) netwrk analyser(e8346a; Agilent Technlgy) w. Fig. sx q e.. ε r, a š ƒ h mx s š q» k œ j E H Maxwell l w. ƒ» w p w () w. λ= C f ----, λg=h -----, l=1, l () Fig.. Schematic diagram f pst resnate methd.

4 17«1y, 006 ƒƒ Zn 3 j q p e w 7 v = πd λ λ λg λ=free Space Resnate Wavelength (3) λg=guiding Wavelength C=Ÿ, d=, h= () (3) w v TE mde œ p w w u w. u w» w š v š (4) v w iteratin ƒ w. u= = J( u) v K ( v) J1( u) K1( v) (4) Jn(u)=1 Bessel w Kn(v)= Mdified Bessel w (4) p w u, v d œ q (5) w w sƒw., j q sƒ swq œ» w œ q d wš w w w. e'= λ πd ( u v ) (5) t d r t e» ƒ t w e SiC #000¾ w z d w, d cavity w e p œ (Open Cavity Resnater Methd) d w, e Fig. 3 ùkü. w t (Q u ) (6), (7) w. d Netwrk Analyser E8346A w. Qm Qu= IL Qm= f f1 Qm=Measured quality factr Qu=Unladed quality factr IL=Insertin Lss f=œ q, f1=3 db Bandwidth (6) (7) œ q (Temperature Cefficient f resnance Frequency: τ cf ) j q ùkü w œ» sƒw d ƒ w. œ» ƒ œ ùkü, TE 011 œ w y œ q d w y w d ƒ w, y (8). Fig. 3. Schematic diagram f pen cavity methd. f TCF= T f ref f ref ( T T ref ) 10 6 ( ppm C ) (8)» f T T œ q, f ref Reference T ref œ q, T y, T ref y. sƒ swq œ» w d w œ œ» w d w ù, x œ œ» w d w. œ œ» q ƒ invar w ü œ» w.

5 8 y Á k Áy w wz Fig. 5. X-Ray diffractin pattern f calcined Zn 3 pwder. Fig. 4. Cnstructin f Tcf equipment. Fig. 4 55~+150 C¾ x ƒ w y x œ œ» š TE 011 œ d w» w Netwrk Analyser E8346A 5~85 C œ q d w z (8) w w. -3. r x (JEOL) w w SiC w #000 ¾ z alumina paste(0.3, 0.05 µm) w z w. 3. š ZnO w 1000 C 4 hr w w z Zn 3 XRD vj y w Zn 3 w w (Fig. 5). Fig. 6 w Zn 3 SEM j» ~3 µm. 900, 950, 1000 C 0.5, 1,, 3, 4, 5 mle% w w Zn 3 XRD ql Zn 3. ƒw Zn 3 SEM x ù. Fig. 6. Zn 3 pwder calcined at 1100 C fr h. ƒ ƒ wì e w š. Fig. 7 ƒ 1000 C w r y, ƒ ƒw ù e w ƒ š. ZnO- x Zn 3 (VO 4 ) œ w e y w. ƒ w ƒ y,,, t y j k. r ƒ y d w. ƒ ƒ ƒ ƒ ƒ 3mle% l

6 제 권 호 17 1, 006 VO5 첨가가 Zn3NbO8 마이크로파 유전체 특성에 미치는 영향 9 Fig. 7. SEM micrstructure f Zn3NbO8 dielectric specimen sintered at 1000C fr 4 hrs with the additin f VO5 a) 0.5 ml%, b) 1.0 ml%, c).0 ml%. d) 3.0 ml%, e) 4.0 ml%, and f) 6.0 ml%. 체적으로 수축율이 낮아지는 경향을 보이고 있다. 벌크 밀도 역시 마찬가지로 V O 의 첨가량 0 mle% 부터 시작하여 V O 의 첨가량이 증가할수 록 증가하다가 3 mle% 이상에서부터 전체적으로 밀도가 낮아지는 경향을 보이고 있다. 각 소결온 도에서의 상대밀도를 Fig. 8에 나타내었다. 5 5 평행판 공진기와 netwrk analyser 를 이용하여 주파수범위를 광대역으로 측정할 때, 가장 먼저 나타나는 공진주파수 Peak는 HEM 로 나타나며, 그 다음피크가 측정하고자하는 TE 공진모드 Peak 가 나타난다. V O 의 첨가량과 소결온도가 높아짐에 따라 유전율의 증가를 보이는데, 1000 C

7 30 y Á k Áy w wz Fig. 8. Relative density at different sintering temperature and varius dped amunt f mle rati. Fig. 10. Quality-Factr at different sintering temperature and varius dped amunt f mle rati. Fig. 9. Dielectric cnstant at different sintering temperature and varius dped amunt f mle rati. mle ratiƒ % š ε r 1.9 ùkü š, 900 C mle ratiƒ % r ε r 1.4 ùk ü. mle ratiƒ ~4% r ε r 1 ùkü, ƒ 3mle% l û w š. w y Fig. 9 ùkü. Fig. 10 t ùkü. t d q w TE 011 mde d swqœ» ùk ù r l HEM 111 mde, TE 011 mde r ƒ r vj, p vj. œ œ» ü l r ùkùš, œ œ» cver ¾ q eƒ w œ œ» TE 011 mde peak q w. d r 900 C 950 C mle ratiƒ 0, 0.5% r š 1000 C mle ratiƒ 0% r w ww TE 011 mde peak ùkü. w peak ùkü r t sww. w 900 C, 950 C ƒ 1% r ƒƒ t ùkü, 1000 C r 0.5% ƒ r w컜 w t û q w. 900 C, mle% š QÜ f 40,000 ùkü š, ƒ ƒw û w j.

8 17«1y, 006 ƒƒ Zn 3 j q p e w 31 Fig. 11. Temperature cefficient at different sintering temperature and varius dped amunt f mle rati. (γ) ƒ w t w e»œ w w. sƒ w œ œ» w TE 011 mde peak ƒ 5 C 85 C ƒ w û q, t sƒ TE 011 mde w mle ratiƒ ƒ r 1000 C, 0.5 mle% r 85 C TE 011 mde peak ƒ w, peak ƒ r wì y w». ƒ ƒ 0, 0.5 mle% r w. Fig. 11 ƒ ƒƒ w r y ùkü, 900 C w r ƒ 1mle% ƒ 0 ƒ¾ T cf 54 ppm/ C ùkü š, ù r T cf 60~ 80 ppm/ C ùkü. 4. Zn 3 ƒw w š, š q p y w.,, X- z SEM w y w. (1) 1100 C w w Zn 3 w w. () ƒw w Zn 3 ZnO- x w, mle% ƒ ƒ 95% p y w. (3) p x Zn 3 y w mle ratiƒ ~4% r ε r 1 ƒ y w š, t 900 CÁ mle rati QÜf=40,000 ùkü, 900 CÁ 1mle rati 0 ƒ¾ T cf = 54 ppm/ C ùk ü š w T cf = 60~ 80 ppm/ C ùkü. š x 1) Ra R. Tummala, J. Am. Ceram. Sc., 74(5), 895 (1991). ) z, LTCC, pineceramics/ 3) y, Ceramist, 3(), (000). 4) Ohsat, H., Nishigaki, S. and Okuda, T., Jpn. J. Appl. Phys., 31(9B), 3136 (199). 5) Takahashi, J., Ikegami, T. and Kakeyama, K., J. Am. Ceram. Sc., 74(8), 1873 (1991). 6) Klar, D., Gabersck, S., Vlavsek, B., Parker, H. S. and Rth, R. S., J. Slid State Chem., 38(), 158 (1981). 7) Jaakla, R., Uusimaki, A., Rautiah, R. and Leppavuri, S., J. Am. Ceram. Sc., 69(10), 34 (1986). 8) Wersing, W., Electrnic Ceramics, p. 67, B.C.H. Steele, Elsevier Science Pub. Lndn (1991). 9) Gabrscek, S. and Klar, D., J. Mater. Sci. Lett., 1, 37 (198). 10) Wakin, K., Minai, K. and Tamura, H., J. Am. Ceram. Sc., 67(4), 78 (1984). 11) Burn, I., J. Mater. Sc., 17, 1398 (198).

9 3 y Á k Áy w wz 1) Jacla, T., Mttnen, J., A. Unsimaki, Rautiah and Leppavuri, S., Ceram. Int., 13, 151 (1987). 13) Takahashi, J., Ikegami, T. and Kakeyama, K., J. Am. Ceram. Sc., 74(8), 1868 (1991). 14) Nagata, E., Tanaka, J., Tsutumi, M. and Bannai, E., Bull. Chem. Sc. Jpn., 56, 3173 (1983). 15) Takada, T., et al., J. Am. Ceram. Sc., 77(7), 1909 (1994). 16) Takada, T., et al., J. Am. Ceram. Sc., 77(9), 485 (1994). 17) Jantunen, H., Rautiah, R., Uusimaki, A. and Leppavuri, S., J. Eur. Ceram. Sc., 0, 331 (000). 18) Tsai, J. K. and Wu, T. B., Materials Letters, 6, 199 (1996). 19) Kim, D. W., K, K. H. and K, S. K., J. Am. Ceram Sc., 84(6), 186 (001). 0) Lee, Y. C., Lin, C. H. and Lin, I. N., Material Chemistry and Physics, 79(-3) 14, (003).

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

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

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

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

45.fm

45.fm Jurnal f the Krean Ceramic Sciety Vl. 44, N. 5, pp. 73~78, 007. Micrwave Dielectric Prperties f CaZr(BO 3 Ceramics Myung-Hwa Nam, Hy Tae Kim,* Jng-Hee Kim,* and Sahn Nahm Department f Materials Science

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

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

04.fm

04.fm w y wz 9«( 2y) 91~96, 2006 J. f the Krean Sciety fr Envirnmental Analysis üy wƒ w y k p ½» w w œw Adsrptin Prperties f the Activated Carbns fr Remving Harmful Gases in Indr Envirnments In-Ki Kim Department

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

31.fm

31.fm Jurnal f the Krean Ceramic Sciety Vl. 44, N. 3, pp. 182~187, 2007. Micrwave Sintering f Gd-Dped CeO 2 Pwder Yung Gun Kim and Seuk-Bum Kim Department f Materials Science and Engineering, Gyenggi University,

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

( )-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

16(5)-02(57).fm

16(5)-02(57).fm Jurnal f Krean Pwder Metallurg Institute Vl. 16, N. 5, 2009 DI: 10.4150/KPMI.2009.16.5.310 /ekœ w TiC/C w w ¼ *Áw a w œ w œw, a Snthesis f TiC/C Cmpsite Pwder b the Carbthermal Reductin Prcess Gil-Geun

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

( )-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

(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

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

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

( )-47.fm

( )-47.fm Jurnal f the Krean Ceramic Sciety Vl. 47, N. 4, pp. 302~307, 2010. DOI:10.4191/KCERS.2010.47.4.302 Effect f V-dping n Clur and Crystallizatin f Malayaite Pigments In-Dn J and Byung-Ha Lee Department f

More information

( )41.fm

( )41.fm Jurnal f the Krean Ceramic Sciety Vl. 46, N., pp. ~9, 009. DOI:10.4191/KCERS.009.46.. Varius Filler Added CaO-Al -SiO Glass Cmpsites fr LTCC Substrate Applicatins Kwan S Kim, H Sn Jang, Hyunh Shin, In

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

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

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

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

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

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

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

( )-40.fm

( )-40.fm Jurnal f the Krean Ceramic Sciety Vl. 47, N. 3, pp. 237~243, 2010. DOI:10.4191/KCERS.2010.47.3.237 Synthesis f Sphene pink Pigment by Rice Husk Ash In-Dn J, Hyun-S Lee, and Byung-Ha Lee Department f Materials

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

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

(153번 김철영).fm

(153번 김철영).fm Jurnal f the Krean Ceramic Sciety Vl. 48, N. 4, pp. 269~277, 2011. DOI:10.4191/KCERS.2011.48.4.269 Effect f Varius Oxides n Crystallizatin f Lithium Silicate Glasses Chul Min Kim, Hyung Bng Lim, Yug Su

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

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

51.fm

51.fm Jurnal f the Krean Ceramic Sciety Vl. 44, N. 5, pp. 279~283, 2007. Preparatin and Characterizatin f BCB Resin-BNT Cmpsite Substrate Materials Un-Yng Kim, Myung-Py Chun, Jung-H Ch, Byung-Ik Kim, Yng-Hyun

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

( )-129.fm

( )-129.fm Jurnal f the Krean Ceramic Sciety Vl. 48, N. 1, pp. 80~85, 2011. DOI:10.4191/KCERS.2011.48.1.080 Effect f HF Treatment n the Crystallizatin Behavir f the Glass Cntaining Cal Bttm Ashes Sinae J and Seunggu

More information

( )-59.fm

( )-59.fm Jurnal f the Krean Ceramic Sciety Vl. 47, N. 4, pp. 319~324, 2010. DOI:10.4191/KCERS.2010.47.4.319 Preparatin f Screen Printable Cnductive MSi 2 Thick Films fr Ceramic Sheet Heater Bae-Yen Kim, Dng-Bin

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

46.fm

46.fm Jurnal f the Krean Ceramic Sciety Vl. 45, N. 5, pp. 285~289, 2008. Effect f Si:C Rati n Prsity and Flexural Strength f Prus Self-Bnded Silicn Carbide Ceramics Kwang-Yung Lim, Yung-Wk Kim, Sang-Kuk W*,

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

( )-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

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

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

< 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

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

106.fm

106.fm Jurnal f the Krean Ceramic Sciety Vl. 44, N. 11, pp. 639~644, 2007. Synthesis f Cbalt Oxide Free Black Clr Spinel Pigment Jun-H Kim*, Seng-H Lee, Man-Chul Suh*, and Byung-Ha Lee Department f Material Science

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

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

( )-86.fm

( )-86.fm Jurnal f the Krean Ceramic Sciety Vl. 46, N. 6, pp.g609~614, 009. DOI:10.4191/KCERS.009.46.6.609 Prperties f Lw Temperature Sintered Prus Ceramics frm Alumina-Zinc Brsilicate Glass Kwan S Kim, Ki Yung

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

( )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

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

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

(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

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

( )-100.fm

( )-100.fm Jurnal f the Krean Ceramic Sciety Vl. 47, N. 6, pp. 491~497, 2010. DOI:10.4191/KCERS.2010.47.6.491 Temperature Dependence n Elastic Cnstant f SiC Ceramics Jng In Im, Byung-W Park, H-Yng Shin, and Jng-H

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

( )-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

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

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

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(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

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

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

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

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

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

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

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

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

(154번 김사라은경).fm

(154번 김사라은경).fm Jurnal f the Krean Ceramic Sciety Vl. 48, N. 4, pp. 316~322, 2011. DOI:10.4191/KCERS.2011.48.4.316 The Effect f Vacuum Annealing f Tin Oxide Thin Films Obtained by RF Sputtering Sun-Phil Kim, Yungrae Kim*,

More information

< D B9DABBF3C8AF29BABCB5E52E666D>

< D B9DABBF3C8AF29BABCB5E52E666D> Jurnal f the Krean Ceramic Sciety Vl. 46, N. 5, pp. 58~533, 009. DOI:10.4191/KCERS.009.46.5.58 Effects f β-sic Particle Seeds n Mrphlgy and Size f High Purity β-sic Pwder Synthesized using Sl-Gel Prcess

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

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

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

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

[ ]-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

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

( )-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

<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

9(1) 이채현.fm

9(1) 이채현.fm Jurnal f Dental Hygiene Science Vl. 9, N. 1 pp. 75~81 (009) 3Y 지르코니아조성에서 Glass Frit 의첨가량에따른소결거동및기계적특성의변화 ³ Á«Á x 1 û w e»œ, x w e»œ, w œw Effect f Glass Frit n the Sintering Behavir and Mechanical Prperties

More information

18(3)-06(09).fm

18(3)-06(09).fm Jurnal f Krean Pwder Metallurgy Institute DOI: 10.4150/KPMI.2011.18.3.256 Cu, Zn, Sn, Se yw p e w xá yá Á xá½³y* û w œw Effects f Ball Milling Cnditin n Sintering f Cu, Zn, Sn and Se Mixed Pwders Jng-Hen

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

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

61.fm

61.fm Jurnal f the Krean Ceramic Sciety Vl. 45, N. 7, pp. 387~394, 2008. A Study n the Infrared Emissin Prperties and Freeze-thaw Resistance fr Calcined Clay by Carburizatin Treatment Kih Kim, Sangmyung Kim*,

More information

78.fm

78.fm Jurnal f the Krean Ceramic Sciety Vl. 44, N. 8, pp. 424~429, 2007. Dual Phase Cnductive CO 2 Membranes: Mechanism, Micrstructure, and Electrical Cnductivity Shiw Lee, Ji Haeng Yu, and Sang Kuk W Energy

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

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

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

( )-70.fm

( )-70.fm Jurnal f the Krean Ceramic Sciety Vl. 47, N. 5, pp. 401~406, 010. DOI:10.4191/KCERS.010.47.5.401 Synthesis f Pure and Prus CaOÁAl Clinker by Burning f Hydrates Du Hyuk Kim and Tae Wng Sng Department f

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

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

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

( )49.fm

( )49.fm Jurnal f the Krean Ceramic Sciety Vl. 46, N., pp. 0~5, 009. DOI:10.4191/KCERS.009.46..0 Effects f the Re-xidatin Temperature and Time n the PTC Prperties f -dped BaTiO Yng-Keun ChungG and Sung-Churl Chi

More information

( )-30.fm

( )-30.fm Jurnal f the Krean Ceramic Sciety Vl. 47, N., pp. 18~188, 010. DOI:10.4191/KCERS.010.47..18 Preparatin f Ce 0.8 Gd 0. O 1.9 Pwder by Milling f CeO Slurry and Oxalate Precipitatin S-Man Sim Schl f Materials

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

( )★56.fm

( )★56.fm Jurnal f the Krean Ceramic Sciety Vl. 46, N. 4, pp. 379~384, 009. DOI:10.4191/KCERS.009.46.4.379 Preparatin and Characterizatin f Black Clr Zircnia by Impregnatin Methd Used by Graphite Kwang-H Lee, Jng-Pil

More information

17.fm

17.fm Jurnal f the Krean Ceramic Sciety Vl. 46, N. 1, pp. 35~40, 2009. Effects f Template Size and Cntent n Prsity and Strength f Macrprus Zircnia Ceramics Su-H Chae, Yung-Wk Kim, In-Hyuck Sng*, Hai-D Kim*,

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

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