Abstract

Both powder and film of apatite-type La 9.33(SiO 4) 6O 2 were prepared by alcoxide-hydrolysis. The apatite formation temperature was considerably lowered in this preparation method comparing to its solid-state reaction. Its sintered body did not show any particular orientation of the anisotropic apatite crystals. Electrical conductivity was 7.2 × 10 −5 S cm −1 at 500 °C. The films deposited on quartz glass and Pt substrates with thickness of either 1.0 or 1.5 μm had uniform microstructure extended on their surface. Preferred orientation of La 9.33(SiO 4) 6O 2 was observed on the surface of the film deposited on quartz glass substrate; its basal plane was parallel to the substrate.

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