作者：刘运传, 孟祥艳, 王康, 周燕萍, 王雪蓉, 段剑, 王倩倩, 李峙澂, 张霞
作者单位：山东非金属材料研究所, 山东 济南 250031
关键词：导热系数;护热板;重复性;可溯源
摘要：
该文介绍一种防护热板法导热系数高温测量装置,其具备温度、长度与热量可溯源性。采用耐高温不锈钢板加工护热板与计量板,热电堆控制量护温差,PT100型铂电阻温度传感器控制温度,金属杆式二等标准铂电阻温度计测量样品热面与冷面的温度,安捷伦3458A多功能数字表测量0.01 标准电阻与计量板加热器电压计量板的热量,冷板上安装位移传感器实时测量受热样品的厚度。在600 ℃条件下,装置温控重复性的标准偏差约为0.01 ℃,测量硅酸钙板的导热系数为0.194 W/(mK),相对标准偏差约为1%。
Development of guarded heat plate thermal conductivity measuring apparatus
LIU Yunchuan, MENG Xiangyan, WANG Kang, ZHOU Yanping, WANG Xuerong, DUAN Jian, WANG Qianqian, LI Zhicheng, ZHANG Xia
Shandong Nonmetallic Materials Institute, Ji'nan 250031, China
Abstract: A guarded hot-plate thermal conductivity measuring apparatus is introduced in this paper. This instrument has the traceability of temperature, length and heat and comprises a guarded hot plate and a measuring plate, both processed from high temperature-resistant stainless steel, a thermopile to control temperature differences, a PT100 platinum resistance temperature sensor, a metal bar-type second-standard platinum resistance thermometer to measure the temperature of hot and cold sample surface, an Agilent 3458A digital multi-meter to measure 0.01 Ω standard resistance and the heat quantity of the voltage measuring plate of the measuring plate heater, and a displacement sensor installed on a cold plate to detect the thickness of heated samples in real time. Under the condition of 600 ℃, the standard deviation in temperature control repeatability is about 0.01 ℃, the thermal conductivity of measured calcium silicate plates are 0.194 W/(m·K), and the relative standard deviation is approximately 1%.
Keywords: thermal conductivity;guarded hot plate;repeatability;traceable
2016, 42(3): 64-66,72 收稿日期: 2015-06-17;收到修改稿日期: 2015-08-17
基金项目: 国防技术基础项目(JSJC2013208C035)
作者简介: 刘运传(1974-),男,山东荷泽市人,研究员,硕士,主要从事计量测计方面的研究。
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