Image icon  BaTiO3 Temperature-stable dielectric capacitor

 
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Description: The image shows a single representative grain within the polycrystalline ceramic. The core region shows ferroelectric domains from the pure, tetragonal BaTiO3 centre. The shell region contains Nb and Bi dopant which make it cubic, paraelectric and also stacking faults associated with their presence. The heterogeneous nature of the microstructure confers the temperature stability on the ceramic.
Keywords: alumina • ceramic • engineering ceramic
Categories: Science approaches > Structure, bonding & defects > Stacking faults
Science approaches > Microstructure
Materials > Ceramics & glasses > Technical ceramics
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
License: This resource is released under the Creative Commons Attribution Non-Commercial Share Alike license (2.0 UK: England & Wales).
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Date created: 02 September 2002
Date added: 21 August 2009
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Resource ID: 1237