On the rutile alpha-PbO"2-type phase boundary of TiO"2

J.S. Olsen, Leif Gerward, Jianzhong Jiang

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Abstract

The high-pressure, high-temperature phase quilibria of TiO"2 have been studied with special emphasis on the rutile and alpha-PbO"2-type phases. It is found that the phase boundary, when plotted in a pressure-temperature diagram, changes from having a negative to having a positive slope with increasing temperature at about 6GPa and 850^oC. For nanophase material, the phase boundary is shifted towards lower pressure. The room-temperature bulk moduli are 210(120)GPa, 258(8)GPa and 290(20)GPa for rutile, the alpha-PbO"2-type phase and the baddeleyite-type phase, respectively.
Original languageEnglish
JournalJournal of Physics and Chemistry of Solids
Volume60
Issue number2
Pages (from-to)229-233
ISSN0022-3697
Publication statusPublished - 1999

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