基于硼粉点火和燃烧特性,介绍了硼粉燃烧热值测试原理和方法,分析了影响硼粉燃烧热值测试不确定度的因素,并对各不确定度分量进行了评定。结果表明,影响硼粉热值测试不确定度的主要因素有:系统热容量的不确定度和助燃剂热值的不确定度;在助燃剂保障硼粉完全燃烧的条件下,减小助燃剂热值的不确定度是提高硼粉热值测试准确度的关键因素。 Based on the ignition and combustion characteristics of boron powder, the principle and method of testing the calorific value of boron powder are introduced. The factors affecting the uncertainty of the calorific value of boron powder combustion are analyzed, and the components of each uncertainty are evaluated. The results show that the main factors influencing the uncertainty of boron calorific value test are: the uncertainty of system heat capacity and the uncertainty of calorific value of oxidizer; under the conditions of complete combustion of oxidizer to ensure the combustion efficiency of boron powder is reduced, The uncertainty of the value is the key factor to improve the accuracy of boron calorific value test.