Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

Thermal constants of pyrophyllite and their change on heating

Thermal constants of pyrophyllite and their change on heating Results are given for the thermal conductivity, thermal diffusivity and specific heat of pyrophyllite before and after heating to temperatures up to 1200 C. Before heating, the conductivity in directions parallel to the bedding planes is about 0.01 cal cm/cm2 s C (0.04 joule cm/cm2 s C) and at right angles to these planes it is half this value. The difference is attributed to the effects of bedding and to preferred orientation of the crystals. A method of finding the directions of maximum and minimum conduction is outlined. As the heating temperature is increased the two conductivities converage, until after heating to 1200 C the physical and chemical changes are such as to make the material thermally isotropic with a conductivity of about 0.003 cal cm/cm2 s C (0.01 joule cm/cm2 s C). Some other properties and uses of pyrophyllite are mentioned. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png British Journal of Applied Physics IOP Publishing

Thermal constants of pyrophyllite and their change on heating

British Journal of Applied Physics , Volume 6 (9) – Sep 1, 1955

Loading next page...
 
/lp/iop-publishing/thermal-constants-of-pyrophyllite-and-their-change-on-heating-uHW0M81PIj

References (3)

Copyright
Copyright © IOP Publishing Ltd
ISSN
0508-3443
DOI
10.1088/0508-3443/6/9/307
Publisher site
See Article on Publisher Site

Abstract

Results are given for the thermal conductivity, thermal diffusivity and specific heat of pyrophyllite before and after heating to temperatures up to 1200 C. Before heating, the conductivity in directions parallel to the bedding planes is about 0.01 cal cm/cm2 s C (0.04 joule cm/cm2 s C) and at right angles to these planes it is half this value. The difference is attributed to the effects of bedding and to preferred orientation of the crystals. A method of finding the directions of maximum and minimum conduction is outlined. As the heating temperature is increased the two conductivities converage, until after heating to 1200 C the physical and chemical changes are such as to make the material thermally isotropic with a conductivity of about 0.003 cal cm/cm2 s C (0.01 joule cm/cm2 s C). Some other properties and uses of pyrophyllite are mentioned.

Journal

British Journal of Applied PhysicsIOP Publishing

Published: Sep 1, 1955

There are no references for this article.