Memoirs of the Faculty of Engineering, Okayama University 17巻 1号
1983-02-25 発行
Oda Kiichi
Research Institute for Non-Crystalline Materials
Yoshio Tetsuo
Research Institute for Non-Crystalline Materials
O-oka Kazuo
Research Institute for Non-Crystalline Materials
A series of ferroelectric glass-ceramics was elaborated by the controlled growth of Ba(1-x)Sr(x)TiO(3) crystal particles in the glass system 60[Ba(1-y)Sr(y)]TiO(3)-10Al(2)O(3)-30SiO(2)(0≦y≦0.2) in molar basis. Analysis of crystal
phases by X-ray diffraction revealed that Sr content in Ba(1-x)Sr(x)TiO(3) increased with increasing content of SrO in glasses by its preferential transfer into the crystal phase, and the appropriate temperature for the crystal growth was 1100°C. Curie temperatures of glass
-ceramics shifted to lower temperature with increasing SrO content in the crystal and comparatively high dielectric
constant was obtained at room temperature for a glass-ceramics with y=0.2. Frequency dependences of dielectric constant and loss tangent were examined in the frequency range from 1 K to 1 M Hz.