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J. Korean Ceram. Soc. > Volume 37(7); 2000 > Article
Journal of the Korean Ceramic Society 2000;37(7): 673.
(65)Pb(${Mg_{1/3}}{Nb_{2/3}}$)$O_3$-(35)$PbTiO_3$의 입자성장과 치밀화에 미치는 과량 PbO의 영향
이종봉, 허태무, 이호용, 최균1, 김도연1
선문대학교 재료금속공학부
1서울대학교 재료공학부 재료미세조직 창의연구단
Effect of Excess PbO on Grain Growth and Densification of (65)Pb(${Mg_{1/3}}{Nb_{2/3}}$)$O_3$-(35)$PbTiO_3$ Ceramics
The effect of excess PbO(0, 1, 2, 4, and 8 mol%) on grain growth and densification of (65)Pb(Mg1/3Nb2/3)O3-(35)PbTiO3 [mol%] ceramics has been investigaetd. With increasing the amount of excess PbO and sintering time, densities of sintered samples decreased gradually. The samples containing less than 1 mol% of PbO showed normal grain growth behavior, however abnormal grain growth was observed to occur in the samples with more than 2 mol% of PbO. In the samples with more than 2 mol% of PbO, the number of abnormal grains decreased and thus the average grain size became smaller with increasing the amount of excess PbO. These results demonstrated that the abnormal grain growth started to occur when a critical amount of excess PbO was added to a (65)Pb(Mg1/3Nb2/3)O3-(35)PbTiO3 sample. Since PMN-PT grains in a liquid matrix were angular, the observed abnormal grain growth was explained to proceed through the two dimensional nucleation process.
Key words: (65)Pb(${Mg_{1/3}}{Nb_{2/3}}$)$O_3$-(35)$PbTiO_3$, Excess PbO, Abnormal grain growth, Interface structure
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