华中科技大学学报（自然科学版）2025，Vol.53Issue(7)：88-93,6.DOI:10.13245/j.hust.250209
亚毫米级低导热材料热导率与比热容测量方法
Measurement method for thermal conductivity and specific heat of submillimeter-sized low thermal conductivity materials
摘要
Abstract
A square pulse heat source method(SPS)based on optical thermal reflection was proposed for simultaneous determination of thermal conductivity and specific heat capacity of sub-millimeter-sized samples.By applying a square-pulse heat source and monitoring the temperature response on the sample surface in real time,high-precision characterization of thermal properties was achieved,with a thermal conductivity measurement range covering 0.2 W/(m∙K)to 2 000 W/(m∙K).To validate the feasibility and accuracy of the method,polymethyl methacrylate(PMMA)was used as a standard sample for systematic experimental measurements and data analysis.The results show that the measured thermal conductivity of PMMA is 0.19 W/(m∙K),and the specific heat capacity is 1.644 J/(cm³∙K).The strong agreement between the measured results and literature values fully demonstrates the high accuracy and reliability of the proposed method.This study provides an efficient and accurate measurement tool for thermal property research on small-sized,low-thermal-conductivity materials.关键词
方脉冲热源法/热导率/比热容/低热导材料/热反射Key words
square-pulsed source(SPS)/thermal conductivity/specific heat capacity/thermal insulator/thermoreflectance分类
能源科技引用本文复制引用
陈韬,宋尚智,江普庆..亚毫米级低导热材料热导率与比热容测量方法[J].华中科技大学学报（自然科学版）,2025,53(7):88-93,6.基金项目
国家自然科学基金面上项目(52376058). （52376058）
