Synthesis of low-firing anorthite powder by the steric-entrapment route

Sang Jin Lee, Chung Hyo Lee, Waltraud M. Kriven

Research output: Contribution to journalConference article

Abstract

A homogeneous and stable, amorphous-type, anorthite (CAO·Al2O3·2SiO2) powder was synthesized by an organic-inorganic steric entrapment route. Polyvinyl alcohol (PVA) was used as an organic carrier for the precursor ceramic gel. The PVA content, its degree of polymerization and type of silica sol had a significant influence on the calcination and crystallization behavior of the precursors. For densification and crystallization at low temperature, porous and soft, amorphous anorthite powder was planetary milled for 20 h. The milled powder crystallized to stable anorthite phase and densified to a relative density of 94% below 1000 °C. The low-firing anorthite ceramics were characterized for examination of microstructure, thermal expansion behavior and dielectric constant.

Original languageEnglish (US)
Pages (from-to)33-40
Number of pages8
JournalCeramic Engineering and Science Proceedings
Volume23
Issue number3
StatePublished - Dec 31 2002
Event26th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A - Cocoa Beach, FL, United States
Duration: Jan 13 2002Jan 18 2002

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ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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