Paper Title:
Preparation of Leucite Powder with Controlled c-Phase Fraction for a Variety of Dental Applications
  Abstract

Leucite (KAlSi2O6) is the main crystalline phase in feldspathic dental materials used for ceramic-fused-to-metal restorations. It occurs in two modifications, low temperature – tetragonal and at temperatures above 600 °C high temperature – cubic modification. The aim of this work was to develop a low-temperature preparation technology of submicron leucite powders with varying ratio of tetragonal and cubic modification. The results show that analcime synthesized in hydrothermal conditions is the suitable precursor for the preparation of leucite with controlled fraction of the c-modification. Homogenous t-leucite having particle size from 2 - 4 μm was prepared by 4h ion-exchange in 4M KCl. Partially stabilized c-leucite was obtained by dual ionexchange; 4h in 4M CsCl led to 48 % of c-modification in the final product.

  Info
Periodical
Key Engineering Materials (Volumes 361-363)
Main Theme
Edited by
Guy Daculsi and Pierre Layrolle
Pages
897-900
DOI
10.4028/www.scientific.net/KEM.361-363.897
Citation
A. Kloužková, M. Mrázová, M. Kohoutková, "Preparation of Leucite Powder with Controlled c-Phase Fraction for a Variety of Dental Applications", Key Engineering Materials, Vols. 361-363, pp. 897-900, 2008
Online since
November 2007
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$32.00
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