There are three types of reference materials used to verify numerous standard test methods: certified reference material (CRM), transfer standard (TS), and reference material (RM). A qualified reference material must be isotropic, and have reproducible consistency and stability over a wide range of temperatures. Metals and alloys are commonly used reference materials for solids, but they do not extend to lower temperature ranges unlike Pyroceram 9606, which is a popular alternative. ...
The aim of this study was to determine whether steady-state methods were better at measuring thermal conductivities of oven-fired clay masonry materials than transient methods, and vice versa. The Transient Plane Source (TPS) Method was tested, and when the results were compared with the other transient methods, there was an agreement of better than +/-3%. Overall, the thermal conductivity values recorded for the transient methods were higher than when the ...
