蓝宝石晶体的热学性能研究
Study on Thermal Properties of Sapphire Crystal
查看参考文献19篇
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文摘
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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α_(11) = 5.312 × 10~(-6) ~ 8.379 × 10~(-6) K~(-1),α_(33) = 6.008 × 10~(-6) ~ 9.317 × 10~(-6) K~(-1),r向热膨胀系数α_r = 5.402 × 10~(-6)K~(-1) ~ 8.821 × 10~(-6) K~(-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k_(11) = 31.429 ~ 5.556 W/(m·K)和k_(33) = 33.611 ~ 7.651 W/(m·K),r向热导率k_r = 36.521 ~ 9.153 W/(m·K) 。 |
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其他语种文摘
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The thermal properties of sapphire crystal grown by heat-exchange method were systematically analyzed. The principal thermal expansion coefficients were measured to be α_(11) =5.312 ×10~(-6)-8.379 ×10~(-6) K~(-1) and α_(33) =6.008 ×10~(-6)-9.317 ×10~(-6) K-1. The thermal expansion coefficient along r direction was measured to be α_r =5.402 × 10~(-6)-8.821 × 10~(-6) K~(-1), 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 k_(11) = 31.429-5.556 W/(m·K) and k_(33) = 33.611-7.651 W/(m·K),r direction thermal conductivity was calculated to be k_r =36.521-9.153 W/(m·K). |
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来源
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人工晶体学报
,2015,44(10):2652-2657 【核心库】
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关键词
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蓝宝石晶体
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热膨胀
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比热
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热扩散系数
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热导率
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地址
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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
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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
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-985X |
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学科
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晶体学 |
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基金
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中国科学院院地合作资助项目
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新疆维吾尔自治区科技计划项目
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文献收藏号
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CSCD:5556378
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