Fabrication of Undoped PbTiO3 Ceramics via Sol-Gel Processing

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J. Korean Ceram. Soc. > Volume 29(3); 1992 > Article

Journal of the Korean Ceramic Society 1992;29(3): 211.

Sol-Gel Processing에 의한 순수 $PbTiO_3$ Ceramics 제조

김선욱, 윤만순, 임종인, 김성숭, 김남흥

산업과학기술연구소 무기재료연구분야 기능세라믹연구그룹

Fabrication of Undoped PbTiO3 Ceramics via Sol-Gel Processing

ABSTRACT

Crack free PbTiO3 ceramics were produced by sol-gel processing using alkoxide, which has not been reported to be successful. The PbTiO3 gels were prepared from Ti alkoxide and lead acetate without any dopants. They were calcined at $600^{circ}C$ and miled to produce fine PbTiO3 powder. It was pressed into discs and they were sintered at 110$0^{circ}C$ for a few hours. The sintered ceramics were relativley hard and dense as having about 96% of theoretical density of PbTiO3. Fabrication of pure PbTiO3 ceramics by sol-gel processing is possibly due to their small grain size and uniform distribution of residual stress created during cubic-tetragonal transition over large number of small grains in fine grain PbTiO3 ceramics.