A differential scanning calorimeter study of the monoclinic (P21/b) ↔ hexagonal (P63/m) reversible phase transition in hydroxyapatite

Hiroyuki Takahashi, Masatomo Yashima, Masato Kakihana, Masahiro Yoshimura

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

The apparent transition temperature (Tc) and enthalpy (ΔH) of monoclinic (P21/b) ↔ hexagonal (P63/m) reversible phase transition in stoichiometric (Ca/P = 5/3) hydroxyapatite were investigated as a function of heating/cooling rate by means of a differential scanning calorimeter (DSC), in the heating/cooling rate range of 0.5-3.0 K/min. The apparent Tc value slightly increased and decreased with increasing heating and cooling rates, respectively, while the apparent ΔH value was almost same within the experimental error.

Original languageEnglish
Pages (from-to)53-56
Number of pages4
JournalThermochimica Acta
Volume371
Issue number1-2
DOIs
Publication statusPublished - 2001 Apr 26
Externally publishedYes

Keywords

  • DSC
  • Heating/cooling rate dependence
  • Hydroxyapatite
  • Hysteresis
  • Reversible phase transition

ASJC Scopus subject areas

  • Instrumentation
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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