The thermal conductivity of talc as a function of pressure and temperature
Talc is a commonly used pressure-transmitting and gasket material for high-temperature and -pressure applications. The thermal conductivity of talc at high pressures and temperatures is therefore valuable in the design of high-pressure experiments and apparatus. In this paper measurements of the thermal conductivity of fired and unfired talk are presented. Measurements were made at pressures ranging from 0 to 2.5 GPa and temperatures from 150 to 900 K. The thermal conductivity was measured with the hotwire technique. The thermal conductivity results for both the fired and the unfired talc show a slight increase with increasing pressure. The absolute value of the thermal conductivity of talc is lower in the fired material than in the unfired material. In both cases, the thermal conductivity varied less than 15% over the temperature range studied. X-Ray diffraction studies have shown talc to be highly disordered. The results are shown to be consistent with those expected for a disordered crystal.
- Research Organization:
- Council for Scientific and Industrial Research, Pretoria (South Africa)
- OSTI ID:
- 5671879
- Report Number(s):
- CONF-880606-
- Journal Information:
- Int. J. Thermophys.; (United States), Vol. 9:6; Conference: 10. symposium on thermophysical properties, Gaithersburg, MD, USA, 20-23 Jun 1988
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
TALC
THERMAL CONDUCTIVITY
CALIBRATION
CRYSTAL STRUCTURE
HEAT TREATMENTS
HIGH TEMPERATURE
MEDIUM TEMPERATURE
ORDER PARAMETERS
POWDERS
PRESSURE DEPENDENCE
SEALING MATERIALS
TEMPERATURE DEPENDENCE
TEMPERATURE MEASUREMENT
TEST FACILITIES
THERMAL TESTING
X-RAY DIFFRACTION
ALKALINE EARTH METAL COMPOUNDS
COHERENT SCATTERING
DIFFRACTION
MAGNESIUM COMPOUNDS
MAGNESIUM SILICATES
MATERIALS
MATERIALS TESTING
MINERALS
NONDESTRUCTIVE TESTING
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SCATTERING
SILICATE MINERALS
SILICATES
SILICON COMPOUNDS
TESTING
THERMODYNAMIC PROPERTIES
360603* - Materials- Properties