Abstract
Abstract The research work presented in this paper shows influence of filler composition in inorganic composite on its emissivity. Development of system which will provide a very high emissivity (0.90 - 0.99) within a short wavelength range is the intention of our project. Active ingredients (Chromium Oxide, Iron powder, Kaolin, Silicon Carbide, Boron Carbide, Boron Nitride and Aluminum Nitride) were built in matrix of the composite. Furrier Transform Infra- Red (FTIR) Spectroscopy method was applied for measurement of spectral emissivity. Block hot plate was used for heating samples in relative emissivity measurement and laser beam in absolute emissivity measurement. These tests demonstrated that filler composition is able to influence emissive properties in range of short IR wavelength (1.5-4.0 μm) within 0.7 - 1.5 times (against the reference). Also influence of content of active ingredient in ceramic matrix on emissivity was measured. Content of active ingredients had no significant effect on emissivity.
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