ELECTRIC-CONDUCTIVITY OF KAOLIN IN THE TEMPERATURE-RANGE 150-560-DEGREES-C

Authors
STUBNA I KOZIK T
Citation
I. Stubna et T. Kozik, ELECTRIC-CONDUCTIVITY OF KAOLIN IN THE TEMPERATURE-RANGE 150-560-DEGREES-C, Journal of thermal analysis, 46(2), 1996, pp. 607-610
Citations number
5
Categorie Soggetti
Chemistry Analytical
Journal title
Journal of thermal analysis → ACNP
ISSN journal
03684466
Volume
46
Issue
2
Year of publication
1996
Pages
607 - 610
Database
ISI
SICI code
0368-4466(1996)46:2<607:EOKITT>2.0.ZU;2-T
Abstract
The dc conductivity of kaolin (Sedlec and Podborany) used in electrica l insulator technology was measured in temperature cycles between 150 and 560 degrees C after preheating at 150 degrees C/30min. The heating and cooling rates were 5 degrees C min(-1). Dehydroxylation was accom panied by a temporary fall in the dc conductivity as a consequence of the reaction between removed OH- groups. The changes in dc conductivit y over the temperatures used were explained by the migration of Ca2+, Na+ and K+.