Development of High Temperature Drop-Calorimeter

高温降热量计的研制

• 批准号: 09555222
• 负责人: YAMAGUCHI Katsunori
• 金额: $ 5.63万
• 依托单位: Iwate University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09555222/
• 关键词: Drop-Calorimeter; Heat Content; Heat Capacity; High Temperature; シリコン; 融点; 融解熱; 断熱型熱量計; 温度ジャンプカロリメトリー

The aim of this work is the development of a high temperature drop-calorimeter used over the temperature range of 1500 to 2000K.The results obtained are summarized as follows :1) The heating furnace used eight heating elements of the lanthanum chromite of 14 mm outer diameter, 90 mm length was made. A uniform temperature zone of the furnace is 15 mm in the temperature range of 700 to 2000K.2) A vacuum sealed quartz cell kept a boron nitride was used as a sample container to avoid the experimental difficulties arising from oxidation of samples at temperature range of 700 and 1900K.3) The dropping device was developed to avoid a breakdown of the sample cell due to a shock caused by the gravitational force when the cell reached the bottom of tube in a calorimeter.4) The calorimeter equivalent was determined using sapphire as standard material, and it was 17.700 kJ/K.5) The accuracy of this high temperature drop-calorimeter and experimental procedure was tested by performing the measurements for a gold in the temperature range from 700 to 1800K.The results agree within 3% with literature values.6) High-temperature heat content of silicon was measured over the temperature range 700 to 1820 K.The heat capacity and heat content equations were derived by use the Shomate function for solid phase and least-squares method for liquid phase.

本工作的目的是开发一种在 1500 至 2000K 温度范围内使用的高温降量热计。获得的结果总结如下：1) 加热炉使用 8 个 14 mm 外径的亚铬酸镧加热元件。直径为 90 毫米，长度为 90 毫米。在700~2000K温度范围内，炉子均温区为15mm。2)采用装有氮化硼的真空密封石英池作为样品容器，避免了样品在700~2000K温度范围内氧化带来的实验困难。 700 和 1900K。3) 滴落装置是为了避免样品池到达热量计管底时因重力冲击而损坏。4)使用蓝宝石作为标准材料确定热量计当量，结果为 17.700 kJ/K。5) 通过在 700 至 1800K 温度范围内对金进行测量来测试该高温降热量计和实验程序的准确性。结果与文献值吻合在3%以内。6)在700~1820 K温度范围内测量了硅的高温热含量。热容量和热含量固相使用 Shomate 函数，液相使用最小二乘法推导出方程。

项目成果

K.Yamaguchi: Handbook of Calorimetry and Thermal Analysis. MARZEN, 317 (1998)

K.Yamaguchi：量热学和热分析手册。

山口勉功: "熱量測定・熱分析ハンドブック" 丸善, 317 (1998)

Tsutomu Yamaguchi：《量热学和热分析手册》Maruzen，317（1998）