Nucleation and crystallization of WO3 from pure and Pb2+ doped NaF fluxes

I. Pelly, E. Dieguez, B. E. Watts, B. M. Wanklyn

Research output: Contribution to journalArticlepeer-review

Abstract

DTA runs and flux growth experiments have shown that the crystallization temperatures of WO3 from NaF flux are in the range of 1020-1090°C. Addition of Pb2+ influences the crystal growth and the crystallization temperatures are altered (within this range). A thermal effect giving rise to an exothermal DTA peak was observed above the crystallization temperature. This peak occurs at a higher temperature when lead ions are present. We propose an explanation based on pre-crystallization clustering and on the number of nucleation sites on the surface of the platinum crucible.

Original languageEnglish
Pages (from-to)157-166
Number of pages10
JournalJournal of Thermal Analysis
Volume50
Issue number1-2
DOIs
StatePublished - 1 Jan 1997

Keywords

  • Nucleation and crystallization of WO
  • Wo

ASJC Scopus subject areas

  • Chemistry (all)
  • Chemical Engineering (all)
  • Engineering (all)

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