Pressure-induced transformations in crystalline and vitreous PbGeO3

Erin N. Oelker, M. Harish Bhat, Emmanuel Soignard, Jeffery Yarger

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

Structural transitions in crystalline and vitreous PbGeO3 were studied at pressures up to 20 GPa. Crystalline PbGeO3 was observed to undergo a pressure-induced amorphization between 12-18 GPa. Vitreous PbGeO3 was found to exhibit an amorphous-to-amorphous transition in a similar pressure range. The structural and thermal properties of the pressure-cycled PbGeO3 materials were further studied with high-energy x-ray diffraction and differential scanning calorimetry. The properties were then compared to those of thermally quenched glass and ball-milled PbGeO3 samples. The structure of pressure-amorphized PbGeO3 was found to closely resemble that of ball-milled PbGeO3. However, the thermal properties probed by differential scanning calorimetry exhibited significant differences to those of thermally quenched PbGeO3 glass.

Original languageEnglish (US)
Pages (from-to)1940-1943
Number of pages4
JournalSolid State Communications
Volume149
Issue number43-44
DOIs
StatePublished - Nov 1 2009

Keywords

  • A. Disordered systems
  • D. Phase transitions

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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