激光脉冲法广泛用于测量固体材料的热扩散率、比热容和热导率。但由于测量原理中关于没有热损失、瞬时脉冲加热等假设与实验条件不完全相符,致使测量结果会有显著的系统误差。着重对于有热损失、加热时间有限(非冲激式)及探测器响应时间等的影响进行了分析,并建立了相应的数据处理方法。通过对纯铁、不锈钢、氧化铝的实验检验,证明测量误差大幅度下降,达到了满意的结果。 Laser pulse method is widely used to measure the thermal diffusivity, specific heat capacity and thermal conductivity of solid materials. However, due to the fact that the measurement principle is not completely consistent with the assumption that there is no heat loss, instantaneous pulse heating and other experimental conditions, the measurement results will have significant systematic errors. Focus on the heat loss, limited heating time (non-impulsive) and detector response time were analyzed, and the corresponding data processing method was established. Through the test of pure iron, stainless steel and alumina, the error of measurement is greatly reduced and the satisfactory result is achieved.