ゾルゲル法によるPbTiO_3-PbZrO_3系多結晶独立膜の合成とその配向性

概要

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ZrO_2, TiO_2, and ZrTiO_4, films were prepared from sols of crystalline fine particles of ZrO_2, and TiO_2, by drying on glass substrates and firing gel films which were separated from the substrates. Then separate polycrystalline films (10-20 μm thick) of PbZrO_3, PbTiO_3 and Pb(Zr,Ti)O_3 were synthesized by heating ZrO_2, TiO, and ZrTiO_2, films, respectively, with lead acetate or lead oxide. Grain orientation was observed in the PbZrO_3, and PbTiO_3, films, but not in the Pb (Zr, ri)O_3, film. The orthorhombic b-axis in the PbZrO_3, film and the tetragonal c-axis in the PbTiO_3, film were perpendicular to the film plane. The orientation of PbZrO_3 depended on the orientation of ZrO_2, crystals, whereas the orientation of PbTiO_3 was independent of orientation of TiO_2, crystals and depended on the flatness of the polycrystalline surface of TiO_2. It was supposed that the oriented PbTiO_2, crystals are formed by crystallization and growth in a thin liquid phase on the film surf ace.
社団法人日本セラミックス協会の論文
1988-06-01