Thermal measuring and testing – Determination of inherent thermal property – Thermal conductivity
Patent
1982-11-24
1984-12-18
Goldstein, Herbert
Thermal measuring and testing
Determination of inherent thermal property
Thermal conductivity
G01N 2518
Patent
active
044888210
ABSTRACT:
A simulated diamond such as crystalline cubic zirconia, which has optical properties very similar to natural diamond and so is difficult to distinguish optically from natural diamond, is distinguished from natural diamond by measuring its thermal conductivity which is significantly different from the thermal conductivity of natural diamond, by measuring the temperature of a heated probe held against the simulated diamond as an indication of the simulated diamond thermal conductivity. In a preferred embodiment of the present invention, a controlled amount of heat energy is generated at the probe and thereafter, while the probe is held against the simulated diamond, the temperature of the probe is detected as a measure of relative thermal conductivity of the simulated diamond to the natural diamond.
REFERENCES:
patent: 2264968 (1941-12-01), DeForest
patent: 2362344 (1944-11-01), Baver et al.
patent: 2951360 (1960-09-01), Sampson et al.
patent: 3611786 (1971-10-01), Schorr
patent: 3668927 (1972-06-01), Howell et al.
Lagagette Instrument Company, "Operation and Maintenance for TC-100 Thermal Comparator".
Ceres Electronics Corporation
Goldstein Herbert
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