Image icon  Aluminous Electrical Porcelain

 
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Description: The microstructure of porcelain is surprisingly complex. Quartz silica grains (Q) are beginning to dissolve and show solution rims (R) of glassy material. The alumina particles are not dissolving at this firing temperature. The relicts of the starting clays contain fine primary mullite in glass (P) while feldspar relicts contain elongated secondary mullite needles.
Keywords: ceramic • clay • feldspar • grain and bond • insulator • porcelain • quartz • vitreous
Categories: Science approaches > Microstructure
Materials > Ceramics & glasses > Fired clays > Porcelain
Materials > Ceramics & glasses > Glasses > Silica
Materials > Ceramics & glasses > Technical ceramics > Alumina
Properties > Electrical, magnetic & optical > Conductivity
Testing, analysis & experimentation > Metallography
Scale > Micro
Created by: DoITPoMS, University of Cambridge
Prof W E Lee, Department of Engineering Materials, University of Sheffield
Published by: DoITPoMS, University of Cambridge
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Date created: 02 September 2002
Date added: 21 August 2009
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Resource ID: 1228