In this paper we report for the first time synthesis of Eu3+ doped transparent glass-ceramics (TGC) with BaBi2Ta2O9 (BBT) as the major crystal phase using the glass system SiO2-K2O-BaO-Bi2O3-Ta2O5 by melt quenching technique followed by controlled crystallization through ceramming heat-treatment. DSC studies were conducted in order to determine a novel heat-treatment protocol to attain transparent GCs by controlling crystal growth. The structural properties of the BBT GCs have been investigated using XRD, FE-SEM, TEM and FTIR reflectance spectroscopy. Optical band gap energies of the glass-ceramic samples were found to decrease with respect to the precursor glass. An increased intensity of emission along with increase in the average lifetime of Eu3+ was observed due to incorporation of Eu3+ ions into the low-phonon energy BBT crystal site. The local field asymmetric ratios of all the samples were observed greater than unity. The dielectric constant (er), dielectric loss, and dissipation factor values of both the base glass and ceramized samples were found to decrease with increase in frequency. This article is protected by copyright. All rights reserved.

中文翻译：

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Eu3+ 掺杂 BaBi2 Ta2 O9 基微晶玻璃纳米复合材料的合成：光学和介电性能

在本文中，我们首次报道了使用玻璃体系 SiO2-K2O-BaO-Bi2O3-Ta2O5 通过熔融淬火技术合成以 BaBi2Ta2O9（BBT）为主要晶相的 Eu3+ 掺杂透明微晶玻璃（TGC）通过陶瓷化热处理结晶。进行 DSC 研究以确定一种新的热处理方案，以通过控制晶体生长来获得透明的 GC。已经使用 XRD、FE-SEM、TEM 和 FTIR 反射光谱研究了 BBT GC 的结构特性。发现玻璃陶瓷样品的光学带隙能量相对于前体玻璃降低。由于 Eu3+ 离子掺入低声子能量 BBT 晶体位点，观察到发射强度增加以及 Eu3+ 的平均寿命增加。观察到所有样品的局部场不对称比率大于一。发现基底玻璃和陶瓷化样品的介电常数 (er)、介电损耗和损耗因数值随着频率的增加而降低。本文受版权保护。版权所有。