ISSN 0862-5468 (Print), ISSN 1804-5847 (online) 

Ceramics-Silikáty 31, (2) 97 - 105 (1987)


DETERMINING THE DIFFUSION COEFFICIENT OF WATER VAPOUR IN KAOLIN BODY DURING ISOTHERMAL FIRING IN THE DEHYDROXYLATION REGION

I


 
Mazačová Yvona 1, Havrda Jiří 1, Unzeitig Martin 2, Hanykýř Vladimír 1
 
1 Institute of Chemical Technology, Department of the Technology of Silicates, Suchbátarova 5, 166 28 Prague 6
2 Czech Technical University, Engineering Faculty, Suchbátarova 4, 166 07 Prague 6

A method was suggested and conditions established for determining the diffusion coefficient of water vapour in a ceramic body during its firing over the dehydroxylation region. The temperature dependence of the diffusion coefficient was determined experimentally; it was found that the diffusion coefficient can be regarded as being independent of concentration.


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