The Effect of PbO on Sintering of Undoped PbTiO3 Ceramics Prepared by Sol-Gel Processing

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J. Korean Ceram. Soc. > Volume 29(5); 1992 > Article

Journal of the Korean Ceramic Society 1992;29(5): 335.

PbO가 Sol-Gel Process로 제조된 순수 PbTiO3 세라믹스의 소결에 미치는 영향

김선욱, 윤만순, 김남흥

산업과학기술연구소 무기재료연구분야 기능세라믹연구그룹

The Effect of PbO on Sintering of Undoped PbTiO3 Ceramics Prepared by Sol-Gel Processing

ABSTRACT

Undoped PbTiO3 ceramics was successfully prepared by using sol-gel process, which had not been fabricated due to its microcracks created by anisotropic stress during phase transition from cubic to tetragonal phase. Fabrication of undoped PbTiO3 ceramics via sol-gel processing was very much affected by the PbO content of the samples as well as PbO vapor from sintering atmosphere. Excess PbO was found to promote rapid grain growth in PbTiO3 ceramics. After sintering at 1100$^{circ}C$ average grain size of PbTiO3 ceramics with excess PbO was about 8 times greater than that of stoichiometric composition, which may be due to PbO liquid phase from excess PbO.