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Proceedings Paper

Optimization of industrial high-temperature processes in kilns for ceramics by use of thermophysical properties
Author(s): Wolfgang Bauer; Thomas Funke
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Paper Abstract

Depending on temperature of the firing process many changes occur in the ceramic materials. They lead to modifications in the thermophysical properties of the materials. Depending on the temperature and the thermophysical properties, temperature-differences occur in the material and as consequence thermal stresses occur which influence the quality of the ceramics. Size and location of these stresses are not known. They can lead to a decrease in material quality or even to total damages. With the help of thermophysical measurements and the knowledge of the responsible properties of the ceramic materials a suitable simulation-model can be worked out as a simulation of the firing process, a calculation of the temperature fields and the arising thermal stresses in the material and an optimization of the process by decreasing the thermal stresses in the endangered ranges based on the simulation-results. For investigations of the critical temperature ranges and for consideration of the changes in the ceramic kiln charge and feed during heating and cooling the measurement methods of the Thermal-Analysis are used. The generated simulation-model is based on the FEM. Basis for these calculations is the knowledge of material-properties (thermal conductivity, specific heat capacity, bulk density, coefficient of linear thermal expansion, modulus of elasticity, Poisson's ratio) dependent from temperature and respective structure.

Paper Details

Date Published: 15 March 2002
PDF: 11 pages
Proc. SPIE 4710, Thermosense XXIV, (15 March 2002); doi: 10.1117/12.459556
Show Author Affiliations
Wolfgang Bauer, Gerhard-Mercator-Univ. Duisburg (Germany)
Thomas Funke, Gerhard-Mercator-Univ. Duisburg (Germany)

Published in SPIE Proceedings Vol. 4710:
Thermosense XXIV
Xavier P. Maldague; Andres E. Rozlosnik, Editor(s)

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