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用熔融冷却法制备铕离子掺杂硼铋锌透明红光玻璃(BBZE)。研究了折射率、密度、摩尔体积、氧离子堆积密度、铕离子体积浓度等物理性质,分析了玻璃的结构、光学性质和热稳定性。结果表明,4%(摩尔分数)Eu~(3+)掺杂时达到最佳值,在465 nm激发下,613 nm处发射强烈红光。玻璃结构中包括[BO_3]、[BiO_3]和少量的[BO_4]组分单元,[BO_3]组成的六圆环结构只存在于铕离子掺杂量高(6%)的玻璃样品中。玻璃呈非晶态,随着Eu~(3+)的升高,玻璃的结构变得更稳定。玻璃中析晶点与玻璃转化点的差值较大,表明其具有良好的热稳定性。这种具有低熔点的BBZE玻璃有望成为用YAG–PIG工艺制备白光LED玻璃的良好基质。
Preparation of Europium Doped Bismuth - Zinc Red Transparent Red Glass (BBZE) by Melt - Cooling. The physical properties such as refractive index, density, molar volume, bulk density of oxygen ions and volume concentration of europium ion were studied. The structure, optical properties and thermal stability of the glass were analyzed. The results show that 4% (molar fraction) Eu 3+ doping reaches the optimum value. At 465 nm excitation, intense red light is emitted at 613 nm. The hexagonal ring structure consisting of [BO_3], [BiO_3] and a small amount of [BO_4] component units [BO_3] in the glass structure is only present in glass samples with high doping levels of europium ions (6%). Glass is amorphous, with the Eu ~ (3 +) increases, the glass structure becomes more stable. The difference between the crystallization point and the glass transition point in the glass shows that it has good thermal stability. This BBZE glass with a low melting point is expected to be a good substrate for the preparation of white LED glass by the YAG-PIG process.