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 (ε_r), dielectric loss, and dissipation factor values of both the base glass and ceramized samples were found to decrease with increase in frequency.

中文翻译：

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掺杂Eu3 +的BaBi2Ta2O9基玻璃陶瓷纳米复合材料的光学和介电性能

在本文中，我们首次报道了使用SiO ₂ -K ₂ O-BaO玻璃体系，以BaBi ₂ Ta ₂ O ₉（BBT）为主要晶相的Eu ³⁺掺杂的透明玻璃陶瓷（TGC）的合成。–Bi ₂ O ₃ –Ta ₂ O ₅通过熔体淬火技术，然后通过陶瓷热处理来控制结晶。为了确定通过控制晶体生长获得透明GC的新型热处理方案，进行了DSC研究。使用XRD，FE-SEM，TEM和FTIR反射光谱对BBT GC的结构特性进行了研究。发现玻璃陶瓷样品的光学带隙能量相对于前体玻璃降低。由于将Eu ³⁺离子掺入低声子能BBT晶体位点，观察到了发射强度的增加以及Eu ³⁺的平均寿命的增加。观察到所有样品的局部场不对称率均大于1。介电常数（_εr），发现基础玻璃和陶瓷化样品的介电损耗和耗散因子值均随频率增加而降低。