PZT系圧電体の焼結挙動に及ぼすNb_2O_5とMnOの添加効果 Influence of Nb_2O_5 and MnO Dope on the Sintering Behavior of PZT Ceramics
The mechanism of shrinkage during sintering was investigated on PZT ceramics. Nb<SUB>2</SUB>O<SUB>5</SUB> and MnO was added to PZT calcined powder. The mechanism of shrinkage was determined from the shrinkage-time curves. The mechanism of shrinkage and grain growth changed depending on the Nb<SUB>2</SUB>O<SUB>5</SUB>/MnO ratio. The dominant mechanism was volume diffusion when the Nb<SUB>2</SUB>O<SUB>5</SUB>/MnO ratio was larger than 6. On the other hand, the volume diffusion was inhibited when the Nb<SUB>2</SUB>O<SUB>5</SUB>/MnO ratio was less than 4. The grain growth was inhibited in the former conditions, while it was promoted in the latter conditions.
粉体および粉末冶金 43(9), 1132-1135, 1996-09-15
Japan Society of Powder and Powder Metallurgy