Abstract The poor thermal stability of current commercial white light emitting diodes (WLED) fabricated using a blue chip, a yellow YAG:Ce 3+ phosphor (YAG) and resins, restricts their application in fields where long service time and high power lighting systems are required. Incorporating YAG into glass offers a possible way to resolve the problem by removing the organic resins in LED encapsulation. In the present study, YAG glass-ceramics with bismuth borate glass matrices were prepared using a rapid melt quenching technique. The YAG erosion mechanism was investigated for the first time in various glass matrix compositions at different co-sintering temperatures. The results demonstrate that neither B 2 O 3 nor Bi 2 O 3 individually erodes YAG particles, but the mixtures of B 2 O 3 and Bi 2 O 3 binary glass systems react with YAG and dissolve it almost completely or generate YAl 3 (BO 3 ) 4 (abbreviated as YAB), and they even erode as-produced YAB again under certain conditions. The production of YAB particles increases with the increase of the n Bi /n B ratio at a lower temperature (680 °C), while it first increases and then decreases at a higher temperature (800 °C). The maximum production of YAB can be obtained at the co-sintering temperature of 680 °C with an n Bi /n B ratio of 55:45 or at 760 °C with an n Bi /n B ratio of 35:65. The intermediate Bi 4 B 2 O 9 phase is found during the transformation of YAG into YAB. A simple but efficient approach is proposed to prevent YAG erosion and increase the luminous properties of YAG glass ceramics to a great extent by simply adding Ca 2+ into bismuth borate glass matrices. The degree of YAG erosion decreases with increasing Ca 2+ concentration until an impurity phase appears when the Ca 2+ concentration exceeds 20 mol%. The combination of good white light emission and suitable quantum efficiency as well as higher thermal stability makes the as-prepared YAG glass-ceramics equipped with a blue chip a possible alternative to commercial WLED.

中文翻译：

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YAG:Ce 3+ 磷在硼酸铋玻璃中的侵蚀机理

摘要 当前使用蓝色芯片、黄色 YAG:Ce 3+ 荧光粉 (YAG) 和树脂制造的商用白光发光二极管 (WLED) 的热稳定性较差，限制了其在长使用寿命和高功率照明系统领域的应用。必需的。将 YAG 加入玻璃中可以通过去除 LED 封装中的有机树脂来解决该问题。在本研究中，使用快速熔体淬火技术制备了具有硼酸铋玻璃基体的 YAG 微晶玻璃。在不同的共烧结温度下，首次研究了各种玻璃基体组合物中的 YAG 侵蚀机制。结果表明，B 2 O 3 和 Bi 2 O 3 都不会单独侵蚀 YAG 颗粒，但B 2 O 3 和Bi 2 O 3 二元玻璃体系的混合物与YAG反应并几乎完全溶解或生成YAl 3 (BO 3 ) 4 (简称YAB)，在一定条件下它们甚至会再次腐蚀生成的YAB使适应。YAB颗粒的产量在较低温度（680℃）下随着nBi/nB比值的增加而增加，而在较高温度（800℃）下则先增加后减少。YAB 的最大产量可以在 680 °C 的共烧结温度下获得，n Bi /n B 比为 55:45，或在 760 °C 下，n Bi /n B 比为 35:65。在YAG向YAB的转变过程中发现了中间Bi 4 B 2 O 9 相。提出了一种简单而有效的方法，通过简单地将Ca 2+ 添加到硼酸铋玻璃基体中来防止YAG侵蚀并在很大程度上提高YAG玻璃陶瓷的发光性能。YAG侵蚀的程度随着Ca 2+ 浓度的增加而降低，直到当Ca 2+ 浓度超过20mol%时出现杂质相。良好的白光发射和合适的量子效率以及更高的热稳定性相结合，使所制备的配备蓝芯片的 YAG 玻璃陶瓷成为商用 WLED 的可能替代品。