21.fm

Size: px
Start display at page:

Download "21.fm"

Transcription

1 Jurnal f the Krean Ceramic Sciety Vl. 45, N., pp. 67~7, 008. Structural Stability During Charge-Discharge Cycles in Zr-dped LiCO Pwders Sen Hye Kim*, Kwang-B Shim**, Jae-Pyung Ahn***, and Chang-Sam Kim Battery Research Center, Krea Institute f Science and Technlgy, Seul 6-79, Krea *Faculty f Engineering, Kyushu University, Fukuka , Japan **Divisin f Advanced Materials Science and Engineering, Hanyang University, Seul -79, Krea ***Advanced Analysis Center, Krea Institute f Science and Technlgy, Seul 6-79, Krea (Received February 0, 008; Accepted March, 008) ƒ w Zr v LiCO ½ *Á Ÿ **Á s***á½ w w» l *j w» l **w w œw ***w w» p l (008 0 ; 008 ) ABSTRACT Zircnium-dped Li C Zr O (0 0.05) pwders as cathde materials fr lithium in batteries were synthesized using an ultrasnic spray pyrlysis methd. Cyclic vltammetry and cyclic stability tests were perfrmed, and the changes f micrstructure were bserved. The slubility limit f zircnium int Li CO was less than 5 ml%, and mnclinic Li ZrO phase was frmed abve the limit. The Zr-dping suppressed the grain grwth and increased the lattice parameters f the heagnal LiCO phase. The Zr-dping f ml% resulted in the best cyclic perfrmance in the range f.0 ~ 4. V at C rate (40 ma/g); the initial discharge capacity decreased frm 58 mah/g t 60 mah/g in the undped pwder, while frm 54 mah/g t 5 mah/g in the Zr-dped pwder f ml% after 0 cycles. The ecellent cycle stability f Zr-dped pwder was due t the lw plarizatin during chargedischarge prcesses which resulted frm the delayed cllapse f the crystal structure f the active materials with Zr-dping. Key wrds : Lithium in battery, LiCO, Zr-Dping, Cycle stability, Micrstructure. y ƒ LiCO k C-O w ñ C O w w, 4. V w Li k w y w ƒ wš j j w» w. ) š» w 4. V w j w w. ù»» wì w j» y s w. y ã š, Crrespnding authr : Chang-Sam Kim Tel : Fa : y v y w. ƒ š LiCO j» 5 ~ 0 µm. j yww j w œ. ù j w w w j» w g pƒ w w ƒ. LiCO j p w j» w, C eyw ù LiCO t gq w w ƒ y w š. -5) LiCO Zr ƒw wù j p p w š š. Zrey 6,7) w p w ƒ, LiO 6 ctahedral inter-slab ƒ ù Li y ü w v w y y ƒ w» š, XRD XANES w ƒ š w. 7) wr, j p 67

2 68 ½ Á Ÿ Á sá½ w + Li j»ƒ w Zr ƒ C ƒ Li ey š ƒ wš, Li ù Zr Lid w» w w» š wš. 6) q w w µm Zr ey LiCO w w»yw p wš p y w j p w w wš w.. Zr ƒ Li (C Zr )O (=0, 0.005,, 0.05) q w w w z z w. w w LiNO (99.95%, Kant chemical, Japan) C(NO ) 6H O (98%, Junsei, Japan), ZrO(NO ) H O(99.5, Aldrich, USA) w. p w» w yw 0% ƒw. ƒ s w yw ƒ 0.5 ml/l..67 MHz q w y w, ƒ 5l/min 70 mm ¼ 00 mm w. 400 C, 800 C w g. vl( µm, 5C, Advantic) w s w. s w z, s w r k z 600 C¾ 5C/min w š, 600 C l C/min 900 C¾ g 0 w z þw. z ƒ ó ù w w. y y w» w XRD (mdel D/ Ma-A, Rigaku, Japan) w 40 kv, 0 ma CuKa graphite mnchrmatr filter w. SEM(Mdel S-400, Hitachi, Japan) TEM(TECNAI G F0, FEI, The Netherlands) w w y»yw z w. w Zr ƒ C yƒ y NEXAFS (near edge X-ray absrptin spectrscpy) w w. w sw ƒ» KIST (80 ~ 800 ev sft -ray). Ÿ X Ÿ { duble crystal mnchrmeter Si() w. reference d w C fil rp (C K- edge = 7709 ev) ùkù vj e w w» w.»yw d g (type 0) w w w. w w y AB(acethylene black) š w PVDF(plyvinylidene fluride) [5% in NMP(-methyl--pyrrlinne)] 90:5:5 z, 5 mm j» g š NMP (-methyl--pyrrlinne) ƒw slder paste mier w ³ w w. y ~ 0 µm Ì swš, 80 C k z,» w w. z, j» punching» w 6 mm z, w œ g y. y p fil, w wetting PP(ply prpylene) w w. w EC(ethylene carbnate) : EMC(ethylmethyl carbnate) : DMC(dimethyl carbnate) = : : M LiPF 6 w š» w w. (Galvanstatic),.0~4. V 50z w., j 0.C w, j l C w. w CV.0 ~ 4.5 V¾ mv/s ww.. š Fig. Zr ƒ XRD ql, q w w w Li C Zr O 900 C 0 w. 8 (006) (0) š 66 (08) (0) vjƒ, w d ƒ Rm α- NaFeO. Li C Zr O 0 Fig.. XRD patterns f (a) Li CO, (b) Li C Zr O, (c) Li C 0.99 Zr O, and (d) Li C 0.95 Zr 0.05 O pwders annealed at 900 C fr 0 h. w wz

3 충방전 과정중 구조가 안정한 Zr이 도핑된 LiCO 분말 69 Structural Parameters f Li C Zr O Pwders R a-lattice c-lattice I /I Table X 범위에서는 이차상 피크가 발견되지 않았으나, Zr 이 5 ml% 치환된 경우에는 단사정계인 Li ZrO 피크가 보여, ml% 첨가까지는 Zr 고용이 가능하지만 그 이상 첨가되면 이차상이 나타나는 것을 알 수 있었다. I /I 비는 층상구조의 양이온혼합정도를 나타내는 척도로써, =0, 0.005,, 0.05에서 각각 5.6,.8,.0,.78로 감소하는 경향을 보여, Zr이 첨가되면 양이온들의 혼합이 증가하는 것을 알 수 있었다. Table 은 각 분말의 격자 상수를 보여주고 있다. 각 분말의 a, c축의 격자상수는 최 소자승법 프로그램에 의해 육방정계로 설정하여 구한 결 과이다. Zr이 치환된 결과를 비교해 보면 Zr의 치환량이 증가할수록 a, c축의 격자상수가 증가하고 있음을 알 수 있다. 그러나 5 ml% 첨가하여 이차상이 생성된 경우는 오히려 격자상수가 감소하였다. 이것은 Zr의 첨가량이 많 아지면 단사정계인 Li ZrO 가 생성되기 때문인 것으로 사 료되었다. 한편 치환에 의한 격자상수의 변화는 치환되는 입자사이의 이온반경 차이와 산화수의 차이에 의한 정전 기적 힘의 차이에 의해서 일어난다. 6배위를 하고 있을 때 Zr 의 이온반경은 0.7 Å으로 C (0.65 Å), C (0.55 Å)보다 크기 때문에 Zr이 C 자리에 치환되면 격자상수 가 증가할 수 있다. 한편 Li 이온반경은 0.76 Å로 Zr 의 이온반경과 비슷하나, Zr이 Li 자리에 치환되었을 때 인 접한 Zr 와 C 의 정전기적 반발력이 Li 와 C 의 반 발력보다 크기 때문에 격자상수가 증가할 수 있다. 어느 경우이거나 격자상수가 증가한 것은 Zr이 치환되었다는 것을 나타내고 있다. 그리고 Zr의 치환양은 초음파분무열 분해법으로 합성하였을 경우 이차상이 나타나지 않은 5 ml% 미만으로, 이것은 졸겔법으로 Zr을 첨가한 경우와 유사한 결과이었다. Fig. 는 900 C에서 0시간 열처리한 분말의 형상을 관 찰한 사진이다. Zr을 첨가하지 않은 분말은 대부분의 입 자크기가 µm 이상이며, 최대 4 µm 정도의 입자도 다수 관찰되었다. Zr 치환량이 증가함에 따라서 입자크기는 작 아졌는데 ml% 첨가되었을 때의 평균입경이 ~ µm로 첨가하지 않았을 때보다 현격하게 작아졌으나, 그 이상 첨가된 경우에는 더 이상 작아지지 않았다. Fig. 은 Zr이 첨가된 분말과 C의 산화정도를 비교하 기 위해서 사용한 CO와 C O 분말의 C L-edge의 NEXAFS 스펙트럼이다. 산화수가 높을수록 높은 에너지 영역에서 피크가 나타나기 때문에, 대부분의 C 산화수 Fig.. SEM images f Li (C Zr )O ( = 0, 0.005,, 0.05) annealed at 900 C fr 0 h. 8) ) 4 + Fig.. C L-edge NEXAFS spectra f Li (C Zr )O, C O and CO. 4 가 가로 예상되는 Li CO 분말의 피크가 가장 높은 에너지 영역이 있으며, Zr이 첨가되면서 피크가 낮은 에 너지 쪽으로 이동하고 있어, Zr이 첨가되면서 C의 산화 수가 감소하는 것을 알 수 있다. 그러나 ml%와 5 ml% 치환한 것의 피크 위치는 같았으며, 이 결과는 XRD 에서 Li ZrO 이차상이 나타나지 않는 5 ml% 미만이 Zr 의 고용한계라는 결과와 일치하는 결과이다. Fig. 4는.0~4.5 V까지 mv/s의 주사속도에서 CV 를 측정한 것이다. SEI (slid electrlyte interface)가 생성 되기 전의 첫 싸이클과 SEI가 생성된 후의 두 번째 싸이 클 사이에서는 산화전위와 환원전위의 변화가 Zr의 첨가 에 상관없이 발생하였다. 그러나 SEI가 생성된 번째 싸 이클 이후에 Zr이 치환되지 않은 활물질에서는 싸이클이 진행됨에 따라서 산화전위는 높아지고, 환원전위는 낮아지 는 분극현상이 현저하게 일어나고 있었다. 이에 대하여, Zr 이 ml% 첨가된 활물질에서는 산화환원 전위에 변화가 제 45 권 제 호(008)

4 김선혜 심광보 안재평 김창삼 70 Fig. 5. Fig. 4. Discharge capacity as a functin f cycle numbers fr cells perated at C(40 mah/g) in vltage ranges.0 4. V. Cyclic vltammgrams f (a) Li CO and (b) Li C Zr O in a vltage range f.0 ~ 4.5 V at a scan rate f mv/s 없어 활물질에 분극이 일어나지 않았음을 알 수 있다. 분 극이 커지는 것은 Li 이온이 활물질 내부로 삽입/탈리를 반복함에 따라서 활물질에 비가역적인 구조 변화가 일어 난 것을 의미한다. Zr이 ml% 첨가된 활물질에서 산화 환원전위에 변화가 없다는 것은 충방전시에 구조가 가역 적으로 변화하고 있다는 것으로, 이러한 결과에서 Zr이 ml% 첨가된 활물질은 우수한 싸이클 특성을 나타낼 것 으로 예상되었다. Fig. 5는 Zr이 첨가되지 않은 것과 0.5 ml%, ml% 첨가된 활물질로 조립한 셀의 싸이클 특성 결과이다. 첫 싸이클의 용량은 Zr을 치환하지 않는 셀에서 가장 높은 58 mah/g 이었으며, Zr을 치환함에 따라서 감소하여 ml% 치환되었을 때는 5 mah/g이 되었다. 그러나 Zr을 치환하지 않은 셀은 0 싸이클까지 거의 직선적으로 방 전용량이 급격히 감소하여 0 싸이클 후에는 60 mah/g 한국세라믹학회지 Fig. 6. TEM images f LiCO pwders (a) befre cycle test and (b) after 50 cycles, and Li C Zr O pwders (c) befre cycle test and (d) after 50 cycles 이하가 되었다. 반면 Zr이 치환된 것은 0 싸이클까지 거 의 방전용량이 감소하지 않았으며, 특히 ml% 치환된 셀은 0 싸이클 후에도 40 mah/g 이상의 방전용량을 나 타내어 예상되었던 것과 같이 우수한 싸이클 특성을 나 타내었다.

5 Fig. 6 Zr ƒ Zr ml% ƒ j z y» w TEM w. t Zr ƒw ù ƒw ñ, Zr ƒw t ƒ. w ü ü w ùkù. wr, 50z j z Zr eyw eyw j ƒ. eyw ù ü w ƒwš, ƒ wù w w t e. Zr ƒ, ü w ƒw t ñ k wš. Wang LiCO j z TEM w j z ü w ƒwš ü ³ w w. 9), Zr ƒ w j p w wùƒ, Zr ey ù ü w w w ƒ». ù Zr w w w w y w, w Dahn ZrO y t gqw, Zr t» wš ü 0) w SEI g y w j p w g ƒ» y w» w HRTEM, EELS w w ww v ƒ. 4. Zr ƒ Li C - Zr O (0 0.05) q w w w w. w Zr š w 5ml%, š w ü Zr ƒ w j š, yw ƒ ƒw. š w Li ZrO ƒ. Zr ƒ w»yw p j w, w y ù j, j p j w. w»yw p ƒ w Zr v LiCO 7 w Zr ey y ƒ w wù y w. Acknwledgment w w» p w»» š y w. REFERENCES. S. T. Myung, N. Kumagai, S. Kmaba, and H. T. Chung, Effects f Al Dping n The Micrstructure f LiCO Cathde Materials, Slid State Inics, 9 [-] (00).. Y. J. Kim, T. J. Kim, J. W. Shin, B. W. Park, and J. P. Ch, The Effect f Al O Cating n the Cycle Life Perfrmance in Thin-film LiCO Cathdes, J. Electrchem. Sc., 49 [0] A7-4 (00).. Z. Wang, C. Wu, L.Liu, F. Wu, L. Chen, and X. Huang, Electrchemical Evaluatin and Structural Characterizatin f Cmmercial LiCO Surfaces Mdified with MgO fr Lithium-In Batteries, J. Electrchem. Sc., 49 [4] A466-7 (00). 4. I. Saadune and C. Delmas, On The LiNi 0.8 C 0. O System, J. Slid State Chem., 6 [] 8-5 (998). 5. S. Oh, J. K. Lee, D. Byun, W. I. Ch, and B. W. Ch, Effect f Al O Cating n Electrchemical Perfrmance f LiCO as Cathde Materials fr Secndary Lithium Batteries, J. Pwer Surces, [-] (004). 6. H. S. Kim, T. K. K, B. K. Na, W. I. Ch, and B. W. Ch, Electrchemical Prperties f LiM C O [M = Mg, Zr] Prepared by Sl-Gel Prcess, J. Pwer Surces, 8 [-] -9 (004). 7. S. H. Kim and C. S. Kim, Imprving The Rate Perfrmance f LiCO by Zr Dping, J. Electrceram., accepted. 8. K. Kang and G. Ceder, Factrs That Affect Li Mbility in Layered Lithium Transitin Metal Oides, Phys. Rev. B, 74 [9] (006). 9. H. Wang, Y. I. Jang, B. Huang, D. R. Sadway, and Y. M. Chiang, Electrn Micrscpic Characterizatin f Electrchemically Cycled LiCO and Li(Al,C)O Battery Cathdes, J. Pwer Surces, (999). 0. Z. Chen and J. R. Dahn, Methds t Obtain Ecellent Capacity Retentin in LiCO Cycled t 4.5 V, Electrchimi. Acta, 49 [7] (004). 45«y(008)

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

( )-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

국8411.fm

국8411.fm Carbn Letters Vl. 8, N. 4 December 2007 pp. 335-339 Electrchemical Perfrmance f Carbn/Silicn Cmpsite as Ande Materials fr High Capacity Lithium In Secndary Battery Taek-Rae Kim, Jing-Yu Wu, Quan-Li Hu

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

(오승모).fm

(오승모).fm Jurnal f the Krean Electrchemical Sciety Vl. 1, N. 1, 009, 81-87 t gq mw-j.o 0 š ¼ Á yá x Á w yw œw y l w» w»» Á w (009 1 30 :009 9 k) Imprvement f High-Temperature Perfrmance f Cathde by Surface Cating

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

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

116.fm

116.fm Jurnal f the Krean Ceramic Sciety Vl. 44, N. 12, pp. 696~702, 2007. Synthesis and Characterizatin f LSGM Slid Electrlyte fr Slid Oxide Fuel Cell Yung-Hn Seng, Seung Hwan J, P. MuralidharanS and D Kyung

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(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

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

( )-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

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

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

( )-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

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

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

(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

( )-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

132.fm

132.fm Jurnal f the Krean Ceramic Sciety Vl. 43, N. 1, pp. 805~811, 006. Effect f Oxidatin f Ni n the Micrstructure f Ni/YSZ Ande and Crack Frmatin in YSZ Electrlyte Layer fr SOFC Jun-Sil Lim,* Jng-Hn Chi,* and

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

117.fm

117.fm Jurnal f the Krean Ceramic Sciety Vl. 44, N. 12, pp. 710~714, 2007. Effect f the LDC Buffer Layer in LSGM-based Ande-supprted SOFCs Eun Hwa Sng* S **, Tai-J Chung**, Hae-Ryung Kim*, Ji-Wn Sn*, Byung Kk

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

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

115.fm

115.fm Jurnal f the Krean Ceramic Sciety Vl. 44, N. 1, pp. 690~695, 007. Preparatin and Electrical Cnductivity f Scandia Stabilized Zircnia by using Ultrasnic Spray Pyrlysis Yung-Hn Chi, Dng-Hyun Peck, Yung-Chul

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

fm

fm Jurnal f the Krean Ceramic Sciety Vl. 46, N. 2, pp. 155~160, 2009. Thermally Stimulated Deplarizatin Current Test fr Reliability f X5R MLCC Ji-Yung Park, Jae-Sung Park, Yung-Tae Kim, and Kang-Hen Hur MLCC

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

( )-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

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

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

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

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

(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

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

( )-121.fm

( )-121.fm Jurnal f the Krean Ceramic Sciety Vl. 48, N. 1, pp. 69~73, 011. DOI:10.4191/KCERS.011.48.1.069 Structural and Crrsive Prperties f ZrO Thin Films using N O as a Reactive Gas by RF Reactive Magnetrn Sputtering

More information

17.fm

17.fm Jurnal f the Krean Ceramic Sciety Vl. 45, N. 2, pp. 126~131, 2008. Variatin f Phtluminescence in Zircnia Gel by Pyrlysis Kyusuk Han and Taegyung K Divisin f Materials Science and Engineering, Inha University,

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

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

( )-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

34.fm

34.fm Jurnal f the Krean Ceramic Sciety Vl 44, N 4, pp 214~218, 2007 Study f Pr (x=0,, 05, and 1) as the Cathde Materials fr Intermediate Temperature SOFC Kwangjin Park, Jung Hyun Kim, and Jngmyen Bae Department

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

< 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

( )-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

18.fm

18.fm Jurnal f the Krean Ceramic Sciety Vl. 45, N. 2, pp. 132~137, 2008. Pre Structure Mdificatin and Characterizatin f Prus Crdierite with Chemical Vapr Infiltratin (CVI) SiC Whisker Ik Whan Kim, Jun Gyu Kim,

More information

( )-106.fm

( )-106.fm Jurnal f the Krean Ceramic Sciety Vl. 46, N. 6, pp. 648~652, 2009. DOI:10.4191/KCERS.2009.46.6.648 Prperties f the Electrlyte Separatrs fr Thermal Batteries Using SiOC Mat Kyung Hn Lim, Kwang Yun Ch, Dh

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

103.fm

103.fm Jurnal f the Krean Ceramic Sciety Vl. 44, N., pp. 6~66, 007. Preparatin and Characterizatin f SiC Cated Graphite Fam Jae Jin Kyung, Jung Ju Kim, S Ryng Kim, W Teck Kwn, Kwang Yun Ch, and Yung Hee Kim Ec-Materials

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

( )-80.fm

( )-80.fm Jurnal f the Krean Ceramic Sciety Vl. 7, N. 6, pp. 603~607, 00. DOI:0.9/KCERS.00.7.6.603 Synthesis and Frmatin Mechanism f Cbalt Dped Willemite Blue Pigments Dng-Ha Hwang, Han Kyng-Sp, and Byung-Ha Lee

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

50(3)-09.fm

50(3)-09.fm Jurnal f the Krean Chemical Sciety 006, Vl. 0, N. 3 Printed in the Republic f Krea LED용 Sr Ga S :Eu + 황색형광체의합성및발광특성 ½ *Á ³Á½ ûá Á½ wá y w yw yw xÿ q š w yw (006. 1. 13 ) Synthesis and Luminescent Characteristics

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

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

( )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

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

45.fm

45.fm Jurnal f the Krean Ceramic Sciety Vl. 45, N. 5, pp. 268~275, 2008. Influence f CrCl 3 in Sphene-Pink Pigments Hyun-S Lee and Byung-Ha Lee Department f Materials Science & Engineering, Myngji University,

More information

50.fm

50.fm Jurnal f the Krean Ceramic Sciety Vl. 45, N. 5, pp. 97~0, 008. Characterizatin f Alumina Dped with Lanthanum and Plurnic P1 via Sl-Gel Prcess Miewn Jung*, ** and Mihe Lee*, ** *Department f Chemistry,

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

( )-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

( )47.fm

( )47.fm Jurnal f the Krean Ceramic Sciety Vl. 46, N. 3, pp. 242~248, 2009. DOI:10.4191/KCERS.2009.46.3.242 Lw Temperature Synthesis f Frsterite Pwders by the Geplymer Technique Se Gu Sn *, **, Ji Hyen Lee**, Sang-Hn

More information

118.fm

118.fm Jurnal f the Krean Ceramic Sciety Vl. 44, N. 12, pp. 703~709, 2007. Cmparisn f the Pwer Generating Characteristics f KIST- and FZ-Julich SOFCs Hwa Yung Jung, Sang Chel Lee, Frank Tietz*, Hae-Ryung Kim,

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

( )78(이기성).fm

( )78(이기성).fm Jurnal f the Krean Ceramic Sciety Vl. 6, N. 5, pp. 78~8, 009. DOI:10.191/KCERS.009.6.5.78 Thermal Shck and Ht Crrsin Resistance f Si Fabricated by Nitrided Pressureless Sintering Kil H Kwak, Chul Kim,

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

( )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

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

49.fm

49.fm Jurnal f the Krean Ceramic Sciety Vl. 45, N. 5, pp. 303~308, 2008. Synthesis f Mullite Pwders by the Geplymer Technique Se Gu Sn, Ji Hyen Lee, Jeng Mi Lee, and Yung D Kim GEOWHA E.S.R Research Center,

More information

58.fm

58.fm Jurnal f the Krean Ceramic Sciety Vl. 44, N. 6, pp. 35~330, 007. Effect f ph n Pre Characteristics in Synthesis f High Prus AlO(OH) Gel by Hydrlysis f Al and Na Mixed Slutin Byung-Ki Park, Dng Uk Che,

More information

( )42.fm

( )42.fm Jurnal f the Krean Ceramic Sciety Vl. 46, N. 3, pp. 8~87, 009. DOI:10.4191/KCERS.009.46.3.8 Optimizatin f Rd-shaped γ-lialo Particle Reinfrced MCFC Matrices by Aqueus Tape Casting Hyun-Jng Chi, Mi-Yung

More information

( )-67.fm

( )-67.fm Jurnal f the Krean Ceramic Sciety Vl. 7, N. 5, pp. 61~66, 010. DOI:10.191/KCERS.010.7.5.61 Electrical Characteristics f Al /TaAlO / SiO Multi-layer Films by Different Tunnel Oxide Thicknesses and Annealing

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

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

( )-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

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

1.fm

1.fm Jurnal f the Krean Ceramic Sciety Vl. 44, N. 1, pp. 58~64, 2007. Fabricatin f Li 2 ZrO 3 Membrane and Evaluatin n the Mechanical Prperties Befre and After CO 2 Separatin Sang Hyun Park, Shiw Lee,* Ji Haeng

More information

76.fm

76.fm Jurnal f the Krean Ceramic Sciety Vl., N. 8, pp. 5~50, 2007. Effect f Brn Carbide n the Mrphlgy f SiC Cnversin Layer f Graphite Substrate frmed by Chemical Vapr Reactin Hyun-Jung Hng, Dh-Hyung Riu, Kwang-Yun

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

( )-39.fm

( )-39.fm Jurnal f the Krean Ceramic Sciety Vl. 47, N. 3, pp. 249~255, 2010. DOI:10.4191/KCERS.2010.47.3.249 Optical Prperties f (V, Pr)-dped ZrSiO 4 Green Pigments Kyu-Ri PynG and Byung-Ha Lee Department f Material

More information

29.fm

29.fm Jurnal f the Krean Ceramic Sciety Vl. 44, N. 3, pp. 169~174, 2007. A Study n the CVD Depsitin fr SiC-TRISO Cated Fuel Material Fabricatin Jun Gyu Kim, E-Sul Kum, D Jin Chi, Sung Sn Kim, Hng Lim Lee, Yung

More information

( )-74.fm

( )-74.fm Jurnal f the Krean Ceramic Sciety Vl. 47, N. 5, pp. 81~86, 010. DOI:10.4191/KCERS.010.47.5.81 Prperties f Self-hardened Inrganic Cating in the System Alumina-Silica-Calcium Oxide by the Reactin with Alkalies

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

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

fm

fm Jurnal f the Krean Ceramic Sciety Vl. 46, N. 2, pp. 175~180, 2009. Effects f Glass Frit Size n the Sintering Behavir f Cu Terminatin Paste in MLCC Kyuha Lee, Byungjun Jen, Chang-Hn Kim, Yunggeun Kwn, Myungjun

More information

( )80(배흥택).fm

( )80(배흥택).fm Jurnal f the Krean Ceramic Sciety Vl. 6, N. 5, pp. 515~519, 009. DOI:10.191/KCERS.009.6.5.515 Estimatin f Triblgical Prperties n Surface Mdified SiC by Chlrine Gas Reactin at Varius Temperatures Heung-Taek

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

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

한 fm

한 fm Jurnal f the Krean Magnetics Sciety, Vlume 19, Number 6, December 2009 DOI: 10.4283/JKMS.2009.19.6.209 œe w w r p(bam) x» e ph w Áû k w œw, z w¼1, 200-701 (2009 10 7, 2009 11 20, 2009 11 21 y ) M-type

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

( )48.fm

( )48.fm Jurnal f the Krean Ceramic Sciety Vl. 46, N. 3, pp. 253~262, 2009. DOI:10.4191/KCERS.2009.46.3.253 A Study f Nucleatin and Grwth in Zinc Crystal Glaze by Firing Cnditins Chi Yun Lee and Byung-Ha Lee* Department

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

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

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

88.fm

88.fm Jurnal f the Krean Ceramic Sciety Vl 45, N 9, pp 544~548, 008 Frmatin f TiB -SiC Ceramics frm TiB -Plycarbsilane Mixtures Shin-Hyuk Kang, Dng-Hwa Lee, and Deug-Jng Kim Schl f Materials Science and Engineering,

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

( )-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

(164번 김도완).fm

(164번 김도완).fm Jurnal f the Krean Ceramic Sciety Vl. 48, N. 4, pp. 328~333, 2011. DOI:10.4191/KCERS.2011.48.4.328 Effect f Degraded Al-dped ZnO Thin Films n Perfrmance Deteriratin f CIGS Slar Cell Dwan Kim, Dng-wn Lee*,

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

( )-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