Diopside-Ca-Tschermak clinopyroxene based glass-ceramics processed via sintering and crystallization of glass powder compacts

A. Goel, D. U. Tulyaganov, S. Agathopoulos, M. J. Ribeiro, R. N. Basu, J. M.F. Ferreira

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28 Scopus citations


The suitability of three new glass compositions for producing diopside-Ca-Tschermak clinopyroxene based glass-ceramics (GCs) was investigated. With respect to the formula of diopside, the first investigated composition resulted from the substitution 0.2(Si4+ + Mg2+) ↔ 0.4 Al3+, which leads to a composition of 80 mol.% diopside and 20 mol.% Ca-Tschermak. The substitutions in the second compositions were 0.25(Ca2+ + Si4+) ↔ 0.25(Y3+ + B3+) and 0.2(Si4+ + Mg2+) ↔ 0.4Al3+, and in the third composition 0.2Ba2+ ↔ 0.2Ca2+ and 0.2(Si4+ + Mg2+) ↔ 0.2(B3+ + Al3+). The influence of these substitutions on glass crystallization and the properties of the GCs produced between 850 and 1000 °C was experimentally investigated. The experimental results showed that the easily cast glasses, after melting at 1580 °C for 1 h, are prone to surface crystallization. Augite is predominantly crystallized, but Ca- and Ba-aluminosilicates can also form, according to the substitutions. The stability of the assemblage of the crystalline phases over a wide temperature range (850-1000 °C) and prolonged heat treatment (up to 50 h) and the properties of the produced GCs indicate a high potential of these compositions for several functional applications.

Original languageEnglish (US)
Pages (from-to)2325-2331
Number of pages7
JournalJournal of the European Ceramic Society
Issue number5
StatePublished - 2007

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry


  • Diopside-Ca-Tschermak
  • Functional applications
  • Glass-ceramics
  • Mechanical properties
  • Sintering


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