保护热板法导热系数测试研究综述
杨 雯,王莹莹,刘加平,刘大龙

(西安建筑科技大学 建筑学院,陕西 西安 710055)

导热系数; 保护热板法; 精度; 标准

A review on thermal conductivity by means of the guarded-hot-plate apparatus
YANG Wen, WANG Yingying, LIU Jiaping,Liu Dalong

(School of Architecture, Xi'an Univ. of Arch. & Techn., Xi'an 710055, China)

thermal conductivity; guarded-hot-plate apparatus; accuracy; standards

DOI: 10.15986/j.1006-7930.2018.01.010

备注

在热力学的基础上,对目前国内外常用的保护热板法(GHPA)导热系数测试仪进行了分类和对比,并对现行GHPA相关标准(中国、美国、欧洲)的适用范围和发展历程进行了对比介绍.以保护热板法的原理出发,从试件条件、实验室环境条件、测试仪器条件和人员操作三个方面分析了对导热系数测量精度产生影响的因素及改进方法.

On the basis of Thermodynamics, the thermal conductivity measurement methods(Steady-state method and transient method)and test equipment performance of high-profile company which product thermal conductivity tester(guarded-hot-plate apparatus)at home and abroad currently have been classified and contrasted. Starting from the principle of guarded-hot-plate, factors that impact on the measurement accuracy of the thermal conductivity and improvements are analyzed from three conditions, i.e. specimen, laboratory environmental, testing equipment conditions and personnel operation. Meanwhile, national standards of measurement of the thermal conductivity are introduced in brief ferms.