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Sol-Gel 법을 이용한 칼슘-알루미네이트계 전자화물 박막의 제조와 특성
김경훈,박주석,채재홍,서원선,소성민,김태관,김형순,이병하,Kim, K.H.,Park, J.S.,Chae, J.H.,Seo, W.S.,So, S.M.,Kim, T.K.,Kim, H.S.,Lee, B.H. 한국결정성장학회 2010 한국결정성장학회지 Vol.20 No.6
Sol-gel법을 적용하여 $12CaO{\cdot}7Al_2O_3$(C12A7) 전자화물 박막을 제조하기 위해 CaO-$Al_2O_3$ sol을 제조하여 dip 코팅법을 적용하여 quartz 기판에 박막을 형성하였으며 열처리를 통해 C12A7의 박막을 제조하였다. C12A7 상의 형성 $800^{\circ}C$에서 시작되었고 $1,200^{\circ}C$ 온도에서 1시간 열처리를 통해 치밀화된 박막을 제조할 수 있었다. 제조된 C12A7 박막은 부도체였지만 수소 환원 분위기 열처리를 통해 전기전도도를 나타내기 시작했으며 $1,200^{\circ}C$ 48시간 열처리 시 120 S/cm의 전기전도도를 나타내었다. The Calcium-aluminate electride thin films on the quartz substrates was coated by sol-gel process. The crystallization of the C12A7 thin film was observed at $800^{\circ}C$ and high density C12A7 thin film was achieved on heat treatment at $1,200^{\circ}C$ for 1 hour. The reduction heat treatment of C12A7 thin film could be converted from insulator to conductor and the electrical conductivity was 120 S/cm in the C12A7 thin film heat treated at $1,200^{\circ}C$ with $H_2$ gas for 48 hours.
응력 - 변형 곡선을 이용한 가황고무의 거동에 관한 연구
김완영,김형순,신홍철,홍상표,이범철 ( W . Y . Kim,H . S . Kim,H . C . Shin,S . P . Hong,B . C . Lee ) 한국공업화학회 1994 공업화학 Vol.5 No.6
본 실험에서는 카본블랙 함량에 따른 미가황고무 혼합물의 물리적 특성과 가황고무 혼합물의 팽윤거동에 대해 고찰하였다. 카본블랙 함량 증가에 따라 미가황고무 혼합물 중의 bound rubber 함량은 증가하였으며 α₁는 1.46이었다. 또한 고무 혼합물 중의 카본블랙은 구형입자의 거동을 보여주었다. Mooney-Rivlin의 응력-변형 방법에 의해 구한 가황고무의 C₁값은 카본블랙 함량 증가에 따라 증가하는 경향을 보였다. The properties of uncured rubber compound and swelling behavior of cured rubber compound with carbon black(N330 grade) increment Bound Rubber content(BRC) increased according to carbon black increment and α_(f*), behavior of uncured rubber compound filled with carbon black, was 1.46. Carbon black added to rubber compound showed behavior of spherical particle by bound rubber. The C₁ values of cured rubber compounds, which measured by the stress-strain method of Mooney-Rivlin, increased with carbon black increment.
Bi<sub>2</sub>O<sub>3</sub>-ZnO-SiO<sub>2</sub> 유리계의 투명유전체 후막에서 나타난 광학특성
전재삼,차명룡,김형순,Jun J. S.,Cha M. R.,Kim H. S. 한국재료학회 2004 한국재료학회지 Vol.14 No.9
Glasses in the $Bi_{2}O_3-SiO_2-ZnO$ glasses system were examined as a potential replacement for lead-oxide glass frits with low firing temperature ($500\sim600^{\circ}C$) for the dielectric layer of a plasma display panel (PDP). The glasses were evaluated for glass transition temperature($T_{g}$) and thermal expansion coefficient(${\alpha}$). After forming transparent thick films by a screen-printing method, it was evaluated for the optical properties. The transmittance of thick films fired at $500-600^{\circ}C$ showed above $80\%$, which was not dependent on the firing temperature. As a result, many pores were observed at samples fired at low temperature, while the number of pores from samples prepared at high temperature decreased and the pores size increased.
전재삼,김재명,김남석,김형순,Jeon, J.S.,Kim, J.M.,Kim, N.S.,Kim, H.S. 한국재료학회 2006 한국재료학회지 Vol.16 No.4
We investigated the effect of ZnO filler on the microstructure of $BaO-B_2O_3-ZnO-P_2O_5$ glass system to find an etching mechanism of barrier ribs. The sintering behavior of composites heated in the temperature range $560-600^{\circ}C$ was studied by volumetric shrinkage rate and microstructure. The etching test was carried out in $HNO_3$ solution at $50^{\circ}C$ for 10 min. The volumetric shrinkage of sintered sample decreased with the increased firing temperature because of the formation of two crystals. Glass and ZnO filler react forming the $BaZn_2(PO_4)_2$ crystal phases during the sintering process. Etching phenomenon of sintered samples by $HNO_3$ showed that the $BaZn_2(PO_4)_2$ crystal phase was strongly leached compared to glass matrix, crystal phases and fillers. Therefore, the control of interface by condition of sintering is so important to achieve etching effect in barrier ribs.
정시전 ( S. J. Chung ),최등영 ( D. Y. Choi ),이천각 ( C. K. Lee ),김형순 ( H. S. Kim ),태철현 ( T. H. Jeen ) 대한내과학회 1968 대한내과학회지 Vol.11 No.4
D.D.S. is well known as the drug of choice for Leprosy. Chronic D.D.S. intoxication has been reported in the many countries. It includes hematological changes, skin manifestations, abnormal liver function test and psychosis, There are few acute intoxicatio