heat production

effective thermal conductivity

temperature field

temperature measurement

spectral emissivity

vitreous silica

ceramic materials

thermal diffusivity

expansion coefficient

thermal design

Review of Scientific Instruments

An ac technique for measuring the thermal conductivity of dielectric solids between 30 and 750 K is described. This technique, the 3ω method, can be applied to bulk amorphous solids and crystals as well as amorphous films tens of microns thick. Errors from black‐body radiation are calculated to be less than 2% even at 1000 K. Data for a‐SiO2, Pyrex 7740, and Pyroceram 9606 are compared to results obtained by conventional techniques.

Thermal conductivity measurement from 30 to 750 K: the 3ω method