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<tex>$Y_2O_3-CeO_2-ZrO_2$</tex> 구조세라믹스의 제조 및 특성 : I 분말의 합성 및 소결성
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  • <tex>$Y_2O_3-CeO_2-ZrO_2$</tex> 구조세라믹스의 제조 및 특성 : I 분말의 합성 및 소결성
저자명
오혁상,이윤복,김영우,오기동,박흥채
간행물명
요업학회지
권/호정보
1996년|33권 9호|pp.1057-1063 (7 pages)
발행정보
한국세라믹학회
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

Y2O3-CeO2-ZrO2 powders were prepared from water-soluble salts using a coprecipitation method. The forming process of oxide and the characteristics of the calcined powders treated in different drying conditions were investigated. The oxidation was occurred at the temperature of around 40$0^{circ}C$ and the main crystallization of ZrO2 around $600^{circ}C$. On calcination at $600^{circ}C$ heating lamp-dried powders consisted of agglomerates of globular morphology with average agglomerate size of 2.27${mu}{ extrm}{m}$ and specific surface area of 68.3m2/g and spray dried powders contained dense spheric particles with average agglomerate size of 1.35${mu}{ extrm}{m}$ and specific surface area of 11.0m2/g which exhibited low agglomeration tendency. Removal of the water by a freeze-drying technique produced calcined powders containing flake-like secondary particle structures with wide agglomerate size distri-bution of 0.1-60${mu}{ extrm}{m}$ and specific surface area of 24.5${mu}{ extrm}{m}$. The 20 MPa-pressed density (36.8-41.4% T,D) of calcined powders did not nealy depend on drying methods whilst compaction ratio of calcined powders derived from freeze-drying was the highest ( 6.24) among three drying methods. On continuous heating up to 150$0^{circ}C$ the sinterability of calcined powders derived from heating lamp-drying was superior to those derived from spray-and freeze-drying. The final sintered density of calcined powders was the highest (96% T,D at 150$0^{circ}C$) in case of heating lamp-drying.