Abstract
In this work the effect of firing temperature on microstructure and chemical composition of silicone–mica composites was studied. Field emission electron microscopy (FESEM) and electron probe microanalysis (EPMA) were used to explore the changes in microstructure and local microchemical composition when samples were heated at 600 and 1000 °C. EPMA showed the presence of skin formation and preferential migration of silica to the surface. These effects were more pronounced at higher temperatures. XRD analysis of mica and composites at different temperatures also showed the formation of new phases as a result of reaction between the decomposition products of mica and silica.
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