蓝宝石晶体的热学性能研究  

Study on Thermal Properties of Sapphire Crystal

作　　者：施纯俊 张连翰[1] 洪佳琪 张方方[3] 潘世烈[3] 杭寅[1] 

机构地区：[1]中国科学院上海光学精密机械研究所中国科学院强激光材料重点实验室,上海201800 [2]中国科学院大学,北京100049 [3]中国科学院新疆理化技术研究所新疆电子信息材料与器件重点实验室,乌鲁木齐830011

出　　处：《人工晶体学报》2015年第10期2652-2657,共6页Journal of Synthetic Crystals

基　　金：中国科学院院地合作项目;新疆维吾尔自治区科技计划项目(201130111)

摘　　要：对热交换法生长的蓝宝石晶体的热学性质做了系统的研究。在298~1773 K的温度范围内,用热膨胀仪测量晶体的主热膨胀系数分别为α11=5.312×10-6~8.379×10-6K-1,α33=6.008×10-6~9.317×10-6K-1,r向热膨胀系数αr=5.402×10-6K-1~8.821×10-6K-1。在298~1273 K的温度范围内,测得晶体的比热为0.7798~1.2242 J/（g·K）。采用激光脉冲法测量了在298~1273 K温度范围内晶体的热扩散系数,并通过计算得出主热导率分别为k11=31.429~5.556 W/（m·K）和k33=33.611~7.651 W/（m·K）,r向热导率kr=36.521~9.153 W/（m·K）。The thermal properties of sapphire crystal grown by heat-exchange method were systematically analyzed. The principal thermal expansion coefficients were measured to be oql =5.312 × 106-8.379 × 10^6 K4 and α33：6. 008× 10^6-9. 317× 10^6 K4. The thermal expansion coefficient along r direction was measured to be αr =5.402 × 10^6-8.821× 104 K4 ,over the temperature range of 298-1773 K with a thermal dilatometer,the experimental specific heat was from 0. 7798 to 1. 2242 J/（ g · K）. The thermal diffusivity of the crystal was measured over the temperature range of 298-1273 K through the laser flash method, and the principal thermal conductivity were calculated to be kH = 31. 429-5. 556 W/（ m· K） and k33 = 33.611-7.651 W/（ m · K）, r direction thermal conductivity was calculated to be kr = 36.521-9. 153 W/（ m · K）.

关 键 词：蓝宝石晶体 热膨胀 比热 热扩散系数 热导率 

分 类 号：O78[理学—晶体学]