Preparation of Glasses and Ceramics for Electrical Use based on Alkoxide and Unidirectional Solidification Methods

Abstract

A review has been made on two methods of preparing glasses and ceramics: (1) alkoxide method for preparing oxide coating films and (2) unidirectional solidification of melts for preparing oriented oxide crystalline bodies. In the alkoxide method for coating, the substrate is dipped in the metal alkoxide solution, withdrawn and heated to several hundred degrees Celsius. Formation of SiO₂ and BaTiO₃ films has been described in detail. In the unidirectional solidification the melt is cooled down in the presence of temperature gradient. Formation of unidirectional crystalline bodies of 0.7NaNbO₃·0.3BaTiO₃, γ-6Bi₂O₃·SiO₂, PbTiO₃ and Bi₂PbNb₂O₉ has been introduced in detail.