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本文系统分析了掺钛蓝宝石晶体的热学性质。在303.15~764.15 K的温度范围内,晶体的主热膨胀系数分别为α1=3.8×10-6K-1和α3=6.4×10-6K-1。298.15 K时,晶体的比热为0.766 J·g-1·K-1。采用激光脉冲法测试了晶体在303~570 K温度范围内的热扩散率。掺钛蓝宝石晶体的主热导率分量k与热力学温度T的函数关系通过拟合获得,为k1=-626.60772/(-2.52108T+706.53622)+5.96781和k3=-1347.76226/(-2.37632T+616.40571)+5.88351。
This paper systematically analyzes the thermal properties of titanium-doped sapphire crystal. In the temperature range of 303.15 ~ 764.15 K, the main thermal expansion coefficients of the crystals are α1 = 3.8 × 10-6K-1 and α3 = 6.4 × 10-6K-1.298.15K, respectively. The specific heat of the crystals is 0.766 J · g -1 · K-1. The thermal diffusivity of the crystal in the temperature range of 303 ~ 570 K was measured by laser pulse method. The main thermal conductivity component, k, of the titanium-doped sapphire crystal as a function of the thermodynamic temperature, T, is obtained by fitting as k1 = -626.60772 / (- 2.52108T + 706.53622) +5.96781 and k3 = -1347.76226 / (-2.37632T + 616.40571 ) +5.88351.