Abstract：The cavity effect caused by the sample furnace cavity is analyzed. The results show that the sample furnace without improvement is great influenced by cavity effect, and it cannot meet the requirements of material emissivity testing. In order to reduce the test error, three methods are provided: to change the cavity physical dimension, to reckon the temperature gradient of cavity in emissivity calculationand to spray low emissivity material on the surface of cavity. According to calculation result, the influenced of cavity effect is reduced. When the depth of the cavity is 10 mm , the error caused by the cavity effect is 1.625% (e=0.8).
孟苏,蔡静. 高温样品加热装置腔效应研究[J]. 计量学报, 2015, 36(6A): 86-89.
MENG Su,CAI Jing. Research on the Cavity Effect of High Temperature Sample Furnace. Acta Metrologica Sinica, 2015, 36(6A): 86-89.
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