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An adiabatic calorimeter for heat capacity measurements of small samples - The heat capacity of nonlinear optical materials KTiOPO4 and RbTiOAsO4 crystals
Tan, ZC; Sun, GY; Song, YJ; Wang, L; Han, JR; Liu, YS; Wang, M; Nie, DZ
关键词Adiabatic Calorimetry Heat Capacity Nonlinear Optical Material Ktiopo4 Rbtioaso4
刊名THERMOCHIMICA ACTA
2000-07-03
352页:247-253
收录类别ISTP ; SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences
类目[WOS]Chemistry, Analytical ; Chemistry, Physical
研究领域[WOS]Chemistry
关键词[WOS]LOW-TEMPERATURE ; SYNTHETIC SAPPHIRE ; FLUX GROWTH ; RANGE
英文摘要A small sample size automated adiabatic calorimeter for measuring heat capacities in the temperature range of 60-360 K has been constructed. The sample cell of the calorimeter was made of thin-walled gold-plated copper with an internal volume of 6 cm(3), equipped with a miniature platinum thermometer, surrounded by two adiabatic shields and housed in a high vacuum can. Two sets of six-junction chromel-constantan thermocouples were mounted between the cell and shields to indicate the temperature difference between them. The lid of the cell was sealed to the main body with a special sealant cycleweld. The adiabatic conditions of the calorimeter cell were automatically controlled by two units of temperature controller. A mechanical pump was used to pump out the vapor of liquid nitrogen in the cryostat to obtain 60 K or even lower temperature. All the experimental data, including the electrical energy and temperature were collected and processed automatically by a personal computer with a predetermined program. The performance of the calorimeter was examined by measuring the heat capacities of alpha-Al2O3. The deviations of experimental results from the smoothed curve lie within +/-0.2%, while the inaccuracy is within +/-0.5% compared with the recommended reference data.
语种英语
WOS记录号WOS:000087272900040
引用统计
被引频次:28[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/138795
专题中国科学院大连化学物理研究所
作者单位1.Chinese Acad Sci, Dalian Inst Chem Phys, Thermochem Lab, Dalian 116023, Peoples R China
2.Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R China
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GB/T 7714
Tan, ZC,Sun, GY,Song, YJ,et al. An adiabatic calorimeter for heat capacity measurements of small samples - The heat capacity of nonlinear optical materials KTiOPO4 and RbTiOAsO4 crystals[J]. THERMOCHIMICA ACTA,2000,352:247-253.
APA Tan, ZC.,Sun, GY.,Song, YJ.,Wang, L.,Han, JR.,...&Nie, DZ.(2000).An adiabatic calorimeter for heat capacity measurements of small samples - The heat capacity of nonlinear optical materials KTiOPO4 and RbTiOAsO4 crystals.THERMOCHIMICA ACTA,352,247-253.
MLA Tan, ZC,et al."An adiabatic calorimeter for heat capacity measurements of small samples - The heat capacity of nonlinear optical materials KTiOPO4 and RbTiOAsO4 crystals".THERMOCHIMICA ACTA 352(2000):247-253.
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