测试条件对水流量平板法测试的热导率的影响  

Influence of testing conditions on the thermal conductivity by calorimeter

作　　者：宋艳艳[1] 王波[1] 王晓雨 李晓睿[1] 张超 Song Yanyan;Wang Bo;Wang Xiaoyu;Li Xiaorui;Zhang Chao(Sinosteel Luoyang Institute of Refractories Research Co.,Ltd.,Luoyang 471039,China)

机构地区：[1]中钢集团洛阳耐火材料研究院有限公司,洛阳471039

出　　处：《耐火与石灰》2024年第4期31-33,50,共4页Refractories & Lime

摘　　要：利用水流量平板法测试的热导率的公式确定了影响测试结果的试验参数,通过试验验证了中心量热器单位时间水流量和试样冷热面温差对热导率的影响。试验表明:在测试温度下试样的热导率随中心量热器单位时间水流量的增加而增大,但当中心量热器单位时间水流量超过一定值后,热导率增大趋势变缓;确定水流量平板法测试的热导率与试样冷热面温差有关,可通过热导率与Δt/ΔT的拟合曲线计算曲线范围内或曲线外推温度下的热导率。The formula for measuring thermal conductivity by calorimeter is used to determine the test parameters that affect the test results.The influence of the water flowrate per unit time of the central calorimeter and the temperature difference between the cold and hot surfaces of the sample on the thermal conductivity is verified through the test.The test shows that the thermal conductivity of the sample increases with the rise of water flowrate per unit time of the central calorimeter at the test temperature.However,when the water flowrate per unit time of the central calorimeter exceeds a certain value,the increase trend of the thermal conductivity slows down.The thermal conductivity measured by the calorimeter is related to the temperature difference between the cold and hot surfaces of the sample.The thermal conductivity within the curve range or at the extrapolated temperature can be calculated by the fitted curve between the thermal conductivity andΔt/ΔT.

关 键 词：水流量平板法 热导率 冷热面温差 测试条件 

分 类 号：TQ175.12[化学工程—硅酸盐工业]