Provisional Assessment of Candidate High-Temperature Thermal Conductivity Reference Materials in the EMRP “Thermo” Project

Presenter Information

J. Wu, National Physical LaboratoryFollow
R. Morrell, National Physical LaboratoryFollow
T. Fry, National Physical LaboratoryFollow
S. Gnaniah, National Physical LaboratoryFollow
D. Gohil, National Physical LaboratoryFollow
A. Dawson, National Physical LaboratoryFollow
J. Hameury, Laboratoire national de métrologie et d'essaisFollow
Alain Koenen, Laboratoire national de métrologie et d’essaisFollow
U. Hammerschmidt, Physikalisch-Technische BundesanstaltFollow
E. Turzó-András, Magyar Kereskedelmi Engedélyezési HivatalFollow
R. Strnad, Český Metrologický InstitutFollow
A. Blahut, Český Metrologický InstitutFollow

Description

This article describes the provisional assessment of a short list of four candidate high-temperature thermal conductivity reference materials in a European research project, “Thermo.” These four candidate materials are low-density calcium silicate, amorphous silica, high-density calcium silicate, and exfoliated vermiculite. Based on initial tests on material composition and microstructure changes, dimensional stability, mechanical stability, chemical stability and uniformity, the best two candidate materials that would be considered for further detailed characterization in the next stage are low-density calcium silicate and high-density calcium silicate. These two materials are dimensionally, mechanically, and chemically stable, which are more robust and easier to handle than others. However, the specimens need to be selected to meet the requirement for material uniformity in terms of density, i.e., density variation within 2%.

Keywords

thermal conductivity, reference material, provisional assessment, high temperature, dimensional stability, mechanical stability, chemical stability, uniformity

DOI

10.5703/1288284315555