高温比热容测试常见问题及误差分析  

Common Problems and Error Analysis of High-Temperature Specific Heat Capacity Tests

作　　者：焦阳[1,2] 刘春凤 王晓鹏[1,2] 孙昭媛[1,2] 余建新 JIAO Yang;LIU Chun-feng;WANG Xiao-peng;SUN Zhao-yuan;YU Jian-xin(Center for Analysis,Measurement and Computing,Harbin Institute of Technology,Harbin 150001,China;School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China)

机构地区：[1]哈尔滨工业大学分析测试与计算中心,黑龙江哈尔滨150001 [2]哈尔滨工业大学材料科学与工程学院,黑龙江哈尔滨150001

出　　处：《分析测试技术与仪器》2022年第2期153-158,共6页Analysis and Testing Technology and Instruments

基　　金：国家自然科学青年基金(51901056)。

摘　　要：介绍了同步热分析仪(STA449F3)测试高温比热容过程中的常见问题及误差分析.采用差示扫描量热三步法测试高温比热容.试验结果表明,提高仪器的稳定性和升温速率可减小比热测试值与理论值之间的误差.此外,将常规一段升温测试分割成若干个窄温区间,提高了高温比热容测试的准确性.The common problems and causations for errors during high-temperature specific heat capacity tests by the simultaneous thermal analyzer(STA449F3)were analyzed.The specific heat capacity was tested using a three-step method with differential scanning calorimetry.The results showed that the errors between confirmed and tested values can be decreased by improving the instrument stability and heating rate.Furthermore,if the conventional one-stage temperature rising test was divided into several narrow temperature ranges,then the accuracy of high-temperature specific heat capacity tests was improved.

关 键 词：同步热分析仪 差示扫描量热法 高温比热容 三步法 误差分析 

分 类 号：TH831.4[机械工程—仪器科学与技术]