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J. Korean Ceram. Soc. > Volume 29(4); 1992 > Article
Journal of the Korean Ceramic Society 1992;29(4): 65.
12Ce-TZP 세라믹스의 소결에서의 CaO의 역할
박정현, 문성환, 박한수
Role of CaO in the Sintering of 12Ce-TZP Ceramics
ABSTRACT
Role of CaO in the sintering of 12Ce-TZP ceramics was studied. The addition of small amounts of CaO increase the densification rate of 12Ce-TZP by altering lattice defect structure and the diffusion coefficient of the rate controlling species, namely cerium and zirconium cations. CaO also inhibits grain growth during sintering and allows the sintering process to proceed to theoretical density by maintaining a high diffusion flux of vacancies from the pores to the grain boundaries. The inhibition of grain growth is accomplished by the segregation of solute at the grain boundaries, causing a decrease in the grain boundary mobility. The segregation of calcium was revealed by AES study.
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