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采用了一种先进的新型纳米粉体合成技术,制备了不同钕离子掺杂浓度的YAG粉体,在不同的温度条件下煅烧,分别研究了其发光特性。结果表明,当温度达到900℃时,YAG晶相形成并伴随着中间相Y_2O_3和YAM。当温度达到1300℃时,中间相完全转化成纯的YAG立方相,获得了纯的YAG晶相。钕离子的掺杂浓度最高为10 mol%,随着Nd~(3+)浓度的增加,吸收光谱的系数增加,并且在1300℃下纯的YAG相中无其它异相出现,YAG的单相程度不随Nd~(3+)掺杂浓度的增加而变化。分别对样品进行了IR,XRD,SEM和荧光吸收和发射光谱表征。实验结果表明超声喷雾共沉淀法合成的钕离子掺杂YAG纳米粉体具备均匀、分散、良好荧光特性的纳米激光材料的特征,该方法有望实现YAG基荧光材料的高浓度掺杂与高发光效率,是一种能获得实际应用的新方法。
An advanced new type of nanopowder synthesis technology was used to prepare YAG powders with different doping concentrations of neodymium ions and calcined at different temperatures to study their luminescent properties. The results show that when the temperature reaches 900 ℃, the YAG crystal phase is formed along with the mesophases Y_2O_3 and YAM. When the temperature reached 1300 ℃, the mesophase completely transformed into a pure YAG cubic phase, obtained a pure YAG crystal phase. The doping concentration of neodymium ion is up to 10 mol%. The absorption coefficient increases with the increase of Nd 3+ concentration, and there is no other phase out of the pure YAG phase at 1300 ℃. The degree does not change with the increase of Nd ~ (3 +) doping concentration. The samples were respectively characterized by IR, XRD, SEM and fluorescence absorption and emission spectra. The experimental results show that the nano-Nd3 + -doped YAG nanopowder synthesized by ultrasonic spray coprecipitation method has the characteristics of uniform, dispersed and good fluorescence properties of the nanometer laser material. This method is expected to realize high concentration doping and high luminous efficiency of the YAG-based fluorescent material , Is a new way to get practical application.