Fabrication of Zirconia Ceramic Fiber by Sol-Gel Processing: (II) The Doping Effect of CaO on Their Microstructure and Phase Transition

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J. Korean Ceram. Soc. > Volume 28(10); 1991 > Article

Journal of the Korean Ceramic Society 1991;28(10): 819.

Sol-Gel법에 의한 $ZrO_2$ Ceramic Fiber 제조 : (II) CaO 첨가가 미세구조 및 상전이에 미치는 영향

김선욱, 윤만순, 송인호

산업과학기술연구소(RIST)

Fabrication of Zirconia Ceramic Fiber by Sol-Gel Processing: (II) The Doping Effect of CaO on Their Microstructure and Phase Transition

ABSTRACT

Pure zirconia ceramic fiber experiences severe volume changes through thermal cyclings of heating and cooling. Zirconia fiber was doped with CaO to stabilize the phase and its effect of CaO was studied on volumetric ratio of each phases, phase transition temperature and microstructure. Tetragonal phase was increased as CaO increases up to 10 mol% and cubic phase was stabilized when CaO was added more than 10 mol%. The average grain size of zirconia fiber was increased as CaO increased and transition temperature was shifted to lower temperature.