利用气悬浮方法制备了Nd3+/Yb3+共掺La2O3-TiO2-ZrO2前驱体玻璃,通过热处理获得了微晶玻璃.通过DTA对前驱体玻璃的热稳定性进行了研究.利用光致发光谱,TEM和EDS对微晶玻璃进行了表征分析,并研究了热处理对上转换发光的影响.结果表明:玻璃转变温度和析晶起始温度分别为799℃和880℃.在980 nm激光激发下,样品发射出中心位于497,523,545,603和657 nm处的五条发光带.热处理后样品上转换发光强度提高,经过880℃保温50 min热处理的微晶玻璃显示了最强的上转换发光,在545 nm处的发光强度是前驱体玻璃的11倍,这是由于在微晶玻璃基质中存在致密柱状晶和Nd3+离子在晶体中富集造成的.
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