Table of Contents
Journal of Ceramics
Volume 2014 (2014), Article ID 861726, 6 pages
Research Article

Coefficient of Thermal Diffusivity of Insulation Brick Developed from Sawdust and Clays

Department of Physics, Kyambogo University, P.O. Box 1, Kyambogo, Kampala, Uganda

Received 29 July 2014; Revised 12 November 2014; Accepted 3 December 2014; Published 29 December 2014

Academic Editor: Jim Low

Copyright © 2014 E. Bwayo and S. K. Obwoya. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This paper presents an experimental result on the effect of particle size of a mixture of ball clay, kaolin, and sawdust on thermal diffusivity of ceramic bricks. A mixture of dry powders of ball clay, kaolin of the same particle size, and sawdust of different particle sizes was mixed in different proportions and then compacted to high pressures before being fired to 950°C. The thermal diffusivity was then determined by an indirect method involving measurement of thermal conductivity, density, and specific heat capacity. The study reveals that coefficient of thermal diffusivity increases with decrease in particle size of kaolin and ball clay but decreases with increase in particle size of sawdust.