玻璃熔体电阻率测定的不确定度评估

Uncertainty Assessment of Glass Melt Resistivity Measurement

玻璃熔体电阻率测定有_(2)种计算分析方法,第1种方法包含玻璃测试样截面积的测定与计算,第2种方法包含玻璃测试样熔体密度的测定与计算。通过对_(2)种测定与计算方法作不确定度评估可知,测试过程中玻璃熔体液面的波动与张力会增加电阻率测试的不确定度,_(2)种方法中玻璃截面积与熔体密度的测试偏差也会分别增加不确定度。对于CaO-B_(2)O_(3)-SiO_(2)-Al_(2)O_(3)无碱玻璃配方,前者测试1500℃下玻璃熔体电阻率的不确定度为±5.0 W·cm,后者为±1.0 W·cm。结果表明:熔体密度法计算电阻率时,不确定度更小。

Introduced two calculations and analysis methods for the measurement of glass melt resistivity.The first method includes the measurement and calculation of the cross-sectional area of the glass test sample,and the second method includes the measurement and calculation of the melt density of the glass test sample.The uncertainty assessment of the two measurement and calculation methods shows that the fluctuation and tension of the glass melt liquid level during the test process will increase the uncertainty of the resistivity test,and the test deviation of the glass cross-sectional area and the melt density in the two methods also increase the uncertainty respectively.For the formulation of CaO-B_(2)O_(3)-SiO_(2)-Al_(2)O_(3) alkali-free glass,the uncertainty of the glass melt resistivity at 1500℃is±5.0 W·cm for the former and±1.0 W·cm for the latter.The results show that the resistivity is calculated by the method of melt density measurement,the uncertainty is smaller.