提拉法生长了Nd3+:Gd3Ga5O12(Nd:GGG) 单晶, 用差示扫描量热法(DSC)和激光脉冲法分别测量了Nd:GGG激光晶体的比热和热扩散系数, 计算得到晶体的导热系数, 与用PPMS测量得到的导热系数相吻合. 实验结果表明: Nd:GGG激光晶体具有较大的比热和导热系数, 具有良好的热物理性能; Nd:GGG晶体的热扩散系数和导热系数随着温度的升高而减小; 计算得到晶体的德拜温度为711K.
Nd3+:Gd3Ga5O12 (Nd:GGG) single crystals were grown by the Czochraski method. Specific heat and thermal diffusivity of Nd:GGG single crystals were measured with differential scanning calorimetry and laser flash methods, respectively. The thermal conductivity of Nd:GGG was calculated, and consistent with the thermal conductivity measured with PPMS. The experimental results indicate that Nd:GGG single crystal has good thermal properties such as high specific heat and thermal conductivity. Thermal diffusivity and thermal conductivity of Nd:GGG single crystal vary with temperature. The higher temperature is, the lower thermal diffusivity and the thermal conductivity are. The Debye temperature of Nd:GGG is 711K.
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