ABSTRACT The glasses in the Bi2O3-K2O-TiO2-P2O5 system were elaborated by the conventional quenching method. Their structure was studied by Raman spectroscopy, and additional information is determined from density measurements and thermal analysis. The optical absorption of the glasses is investigated and it is found that the optical gap and the Urbach energy decrease and increase, respectively, with increasing Bi2O3 content. The crystallization of the glasses was performed under controlled heat treatments to develop glass-ceramics. Their dielectric constants are carried out by impedance spectroscopy. The variations of the permittivity (ϵr) and the dielectric loss (tanδ) versus frequency and temperature are determined. It is evidenced that the introduction of Bi2O3 in the glasses diminished the dispersion at low frequencies. The presence of bismuth oxide in the materials is also beneficial since it allowed the formation of glass-ceramics with high dielectric constant and low dielectric loss.

中文翻译：

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Bi2O3-K2O-TiO2-P2O5 玻璃和相关微晶玻璃的结构、光学和介电性能

摘要 Bi2O3-K2O-TiO2-P2O5 体系中的玻璃是通过常规淬火方法制备的。它们的结构是通过拉曼光谱研究的，额外的信息是从密度测量和热分析中确定的。研究了玻璃的光吸收，发现光学间隙和 Urbach 能量分别随着 Bi2O3 含量的增加而减少和增加。玻璃的结晶是在受控热处理下进行的，以开发玻璃陶瓷。它们的介电常数是通过阻抗谱来计算的。确定了介电常数 (ϵr) 和介电损耗 (tanδ) 随频率和温度的变化。有证据表明，在玻璃中引入 Bi2O3 减少了低频色散。