Isothermal phase transformations of a dental porcelain

S. Warren Twiggs, J. Rodway MacKert, Amalia L. Oxford, Janet W. Ergle, Petra E. Lockwood

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


Change in the leucite weight fraction during an isothermal heat treatment was estimated by observing the deformation of PFM strips in a high-heating-rate, computer-controlled bending beam viscometer (BBV). Specimens of a commercial body porcelain were fired according to the manufacturers instructions-50 disk specimens for quantitative X-ray diffraction (XRD) and 100 bimaterial strip specimens for BBV. Timoshenko's equation for bimaterial thermostat was used to estimate the change in the thermal expansion of the porcelain near room temperature. Good agreement was obtained between values of leucite weight fraction derived from beam deformation and those determined by XRD.

Original languageEnglish (US)
Pages (from-to)580-585
Number of pages6
JournalDental Materials
Issue number6
StatePublished - Jun 2005


  • Ceramics
  • Dental porcelain
  • Leucite
  • Thermal expansion
  • X-ray diffraction

ASJC Scopus subject areas

  • Materials Science(all)
  • Dentistry(all)
  • Mechanics of Materials


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