Abstract From a glass with the mol% composition 20.1 Na2O-3 Al2O3-23.1 BaO-23 TiO2-7.6 B2O3-17.4 SiO2-5.8 Fe2O3 cubic barium titanate was crystallized. Scanning and transmission electron microscopy micrographs of the prepared glass-ceramics show fine crystals agglomerated to globular particles. With increasing crystallization time, their volume concentration increases and the particles form interconnected aggregates. From electrical impedance measurements of selected glass ceramics, the electrical conductivity and the dielectric permittivity of the prepared materials were determined for temperatures from −-170 °C to 97 °C, and frequencies from 100 Hz to 100 kHz. The typical values of the resistance are in the order of 108 Ω and the dielectric constants in the order of 40 at 100 kHz at room temperature. The two diffuse relaxor type phase transitions observed from −-123 to −-73 °C and from −-33 to 0 °C are attributed to the transformation rhomboherdral - orthorhombic and orthorhombic - cubic BaTiO3, respectively.

中文翻译：

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含钛酸钡微晶玻璃 - 相组成和微观结构对介电性能的影响

摘要 从具有 20.1 Na2O-3 Al2O3-23.1 BaO-23 TiO2-7.6 B2O3-17.4 SiO2-5.8 Fe2O3 立方钛酸钡的 mol% 组成的玻璃中结晶。制备的微晶玻璃的扫描和透射电子显微镜显微照片显示细小的晶体聚集成球状颗粒。随着结晶时间的增加，它们的体积浓度增加并且颗粒形成相互连接的聚集体。根据所选玻璃陶瓷的电阻抗测量，所制备材料的电导率和介电常数在 --170 °C 至 97 °C 的温度和 100 Hz 至 100 kHz 的频率下确定。电阻的典型值约为 108 Ω，介电常数在室温下 100 kHz 时约为 40。