“Nose Method” of Calculating Critical Cooling Rates for Glass Formation

Michael C. Weinberg, Donald R. Uhlmann, Edgar D. Zanotto

Research output: Contribution to journalArticle

40 Scopus citations

Abstract

In the past, it has been shown that reasonably good estimates of critical cooling rates for glass formation could be obtained by computing the cooling curve which just passes through the nose of a T‐T‐T (time—temperature—transformation) diagram. Also, it has been noted that critical cooling rates found by this procedure are generally greater than those obtained by other methods. Herein, we provide an explanation of these observations. The nose method of computing critical cooling rates is compared with others, and specific illustrations are given for the glass‐forming systems SiO2, GeO2, and P2O5.

Original languageEnglish (US)
Pages (from-to)2054-2058
Number of pages5
JournalJournal of the American Ceramic Society
Volume72
Issue number11
DOIs
StatePublished - Nov 1989

Keywords

  • cooling
  • germania
  • glass
  • phosphates
  • silica

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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