Fine Powder Synthesis and It첨s Sintering Characteristics of CaO-Stabilized $ZrO_2$ by Coprecipitation Method

공침법에 의한 CaO 첨가 안정화 $ZrO_2$의 미분말 합성 및 그 소결특성

  • 박정일 (경성대학교 재료공학과) ;
  • 이주신 (경성대학교 재료공학과) ;
  • 최태운 (경성대학교 재료공학과)
  • Published : 1996.05.01

Abstract

In order to fabricate solid electrolyte CaO-stabilized ZrO2 of high density sintered body economically 13 mol% CaO-stabilized ZrO2 powders were synthesized by the coprecipitation method. The characteristics and sintering behavior of fine powder were investigated. The precipitates has the specific surface area of 193 m2/g and apperaed to be fine and spherical primary particles with a size of approximately 5nm. The crystalliza-tion temperture of CaO-stabilized ZrO2 was 462$^{\circ}C$. The tetragonal phase was stable in the low calcining tempe-rature regions and the cubic zirconia solid solution was formed from above 120$0^{\circ}C$ through an intermediate stage of formation of CaZrO3 By introducing fine powders washed with alcohol and ball-milling process after calcination the sintered body was possible to attain the value of above 92% of the theoretical density at low temperature of 120$0^{\circ}C$.

Keywords

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