Chapter 9. Rare-Earth Doped Aluminous Electrical Porcelain

  1. William M. Carty
  1. Dulcina M. Souza1 and
  2. Adilson L. Chinelatto2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294734.ch9

Materials & Equipment/Whitewares: Ceramic Engineering and Science Proceedings, Volume 23, Issue 2

Materials & Equipment/Whitewares: Ceramic Engineering and Science Proceedings, Volume 23, Issue 2

How to Cite

Souza, D. M. and Chinelatto, A. L. (2002) Rare-Earth Doped Aluminous Electrical Porcelain, in Materials & Equipment/Whitewares: Ceramic Engineering and Science Proceedings, Volume 23, Issue 2 (ed W. M. Carty), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294734.ch9

Author Information

  1. 1

    Federal University of Sao Carlos, Brazil

  2. 2

    State University of Ponta Grossa, Brazil

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2002

ISBN Information

Print ISBN: 9780470375778

Online ISBN: 9780470294734

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Keywords:

  • aluminous electrical porcelain;
  • quartz;
  • triaxial porcelain composition;
  • mullite;
  • recrystallization

Summary

Aluminous electrical porcelain was prepared by replacing quartz with α-alumina in a triaxial porcelain composition, However, the presence of alumina suppresses the dissolution of primary mullite in the glassy phase and recrystallization of secondary mullite. Since the strength of porcelain is dependent on mullite content in the microstructure, additives are used to maintain the mullite on the microstructure. In this work the influence of rare earths on microstructure, strength, and dielectric properties was investigated. It was found that low concentrations of erbium, dysprosium, and samarium promote increase in strength, and yttrium and ytterbium promote decrease in strength, while dielectric properties were unchanged for all rare earths.