Kinetics of the Formation of Alkoxy-derived Barium Metasilicate

摘要: Amorphous BaSiO3 or a mixture of this and BaSiO3·H2O was formed by the simultaneous hydrolysis barium silicon alkoxides. The temperature time aging influence crystallization amorphous into BaSiO3·H2O. decomposition crystalline analyzed isothermal thermogravimetry. Decomposition isotherms were constructed equation −ln(1−α)=kt activation energy determined as 143.5 kJ/mol. kinetics interpreted 1−(1−α)1⁄3=kt. Activation energies 276 kJ/mol 204 for initial final stages, respectively.