噴霧熱分解法によるPb(Zr,Ti)O_3球状微粒子の合成と組成分布

概要

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Spherical and narrow-size lead zirconium titanate (PZT) powders (average diameter : 0.39 μm) were prepared by ultrasonic spray pyrolysis of a mixed solution of lead-iso-propoxide, zirconium-buthoxide and titanium-iso-propoxide or lead-acetate, zirconium-buthoxide and titanium-iso-propoxide. From EDX measurement each particle in PZT powders had very little compositional fluctuation. In this process, the homogeneity of Ti, Zr and Pb in PZT precursor particles plays an important role in the formation of homogeneous PZT powders. Inhomogeneity of PbO in PZT precursors resulted in evaporation of PbO from the surface of the precursor on calcination in air. As a result, less PbO in the precursor caused formation of PZT having less Zr and coexistence of ZrO_2 in the particles. Using metal alkoxides as a source of PZT and refluxing starting solutions result in good compositional homogeneity in each PZTparticle.
社団法人日本セラミックス協会の論文
1989-04-01