温—时积分法是利用非稳态法测定导热系数的一种方法,本文概述了温—时积分法的工作原理、并对其导热系数的计算公式进行了理论推导。在推导过程中,由于引入了温—时积分概念,避开了复杂的数学运算,导出了极为简便的导热系数计算公式。 The temperature-time integral method is a method to determine the thermal conductivity by using the unsteady method. This paper summarizes the working principle of the temperature-time integral method and deduces the theoretical formula of its thermal conductivity. In the process of derivation, due to the introduction of the concept of temperature-time integration, avoiding the complicated mathematical operation, the formula for calculating the thermal conductivity is derived.