共沈法によるPLZTの合成と微粉砕処理の影響

概要

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PLZT((Pb, La)(Zr, Ti)O_3) ceramics was synthesized by the coprecipitation method using nitrates and ammonia. Dehydration was promoted by replacement with butanol and ethanol to prevent the aggregation of primary particles. Precursor gel consisted of well dispersed particles less than 10 nm was obtained by replacement with butanol. A powder treated in butanol and calcined at 500℃ for 2 h was sintered to full density at 1150℃ for 6 h. Transparency of sintered body was related to its porosity. The sintered body obtained at 1200℃ for 20 h showed the transmittance of 20%. Mechanochemical effects on the synthesis and pulverization of PLZT ceramics were also examined. Grinding of the precursor gel powder promoted mechanochemical reaction. Grinding of calcined powders caused the decrease in the crystallinity. Sinterability was reduced by grinding, but annealing of calcined and ground powder recovered the original sinterability.
社団法人日本セラミックス協会の論文
1993-01-01