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The paper describes a new method which increases radiation heat transfer of furnace refractory and partly increases the gas tightness and life span of the lining. As heating-up time is decreased, the method also makes the operation of the furnace more flexible. Application of silicon carbide furnace coating increases the emissivity of ceramic fibre insulation by 45%, while that of shamotte by 20%. The phenomenon is illustrated by infrared thermograms and their temperature analysis. IR-emissivity was measured by infrared thermograms. Industrial applications are also referred to.

Improvement of IR-emissivity of ceramic fibre by silicon carbide coating in furnaces