基于组合边界条件的固体材料热扩散系数测试方法

陈清华, 吴佳乐, 陆育, 季家东, 刘萍

Testing Method for Thermal Diffusivity of Solid Materials Based on Combined Boundary Conditions

CHEN Qinghua, WU Jiale, LU Yu, JI Jiadong, LIU Ping

表4 3种材料对比结果

Tab.4 Comparison of three materials

材料 ρ/(kg·m-3) c/[J·(kg·℃)-1] α×107/(m2·s-1) λ/[W· (m·K) -1] Δλ/% 计算值 文献值[19-20] PMMA 1 170 1 380 1.193 0.193 0.194 0.72 Pyrex7740 2 250 740.2 6.833 1.138 1.1 3.45 大理石 2 634.2 816.9 13.205 2.842 2.8 1.50