WU Limin， XUE Minjie

(Department of Material Science & Quality Inspection, Shanghai Institute of Measurement and Testing Technology, Shanghai 201203, China)

Abstract: In order to study the relevant factors that affect the skeleton density measurement of the gas volume displacement method, solutions to ensure high-precision measurement methods were proposed by discussing the influence of instrument calibration, measurement program settings, sampling volume, sample dryness, and microporous structure sample pretreatment methods on the measurement results. The results show that the repeatability of the above method for measuring skeleton density standard materials is 0.05%, the error is 0.01%, and the measurement accuracy is 0.01%. The skeleton density measurement scheme of the gas volume displacement method is characterized by the inert gas replacing the infiltration liquid to determine the discharged volume of the solid sample, which has higher measurement accuracy.

Keywords: skeleton density; true density; gas volume displacement method; immersion method

中图分类号：O657.99

文献标志码：A

文章编号：1008-5548(2021)05-0070-07

DOI:10.13732/j.issn.1008-5548.2021.05.009

收稿日期： 2021-02-24，修回日期：2021-03-13，在线出版时间：2021-08-16 17:09。

基金项目：国家标准制修订计划项目，编号：20181021-T-469；上海市质量技术监督局科技计划项目，编号：2018-04。

第一作者简介：吴立敏(1971—)，女，教授级高工，研究方向为材料物性表征及标准化技术。E-mail: wulm@simt.com.cn。

通信作者简介：薛民杰(1980—)，男，高级工程师，研究方向为危险化学品分类鉴定技术。E-mail: xuemj@simt.com.cn。