【摘要】 本文报道了计算机运控的非稳态法半球向全发射率测定装置。其测温范围0-300℃,特别适用于测定金属、太阳能选择性吸收涂层和其他低发射率涂层。文中还比较了用液氮和酒精两种致冷介质的实验结果,以及半球向全发射率与法向发射率的测试数据。更多还原

【Abstract】 A total hemispherical emittance measurement apparatus by means of the transient calorimetric technique with a microcomputer is described.For the use of the microcomputer,the complicated manual calculation can be avoided and the measurement accuracy increases as well.This apparatus is the operating temperatures of the apparatus is in the range from0℃to 300℃ specially suitable for measaring the metallic materials,solar selective coatings and other low emittance coatings.更多还原