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

doi:10.1016/S0040-6031(01)00431-2

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 journal › Article › peer-review

31 Citations (Scopus)

Abstract

The apparent transition temperature (T_c) 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 T_c 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 language	English
Pages (from-to)	53-56
Number of pages	4
Journal	Thermochimica Acta
Volume	371
Issue number	1-2
DOIs	https://doi.org/10.1016/S0040-6031(01)00431-2
Publication status	Published - 2001 Apr 26
Externally published	Yes

Keywords

DSC
Heating/cooling rate dependence
Hydroxyapatite
Hysteresis
Reversible phase transition

ASJC Scopus subject areas

Instrumentation
Condensed Matter Physics
Physical and Theoretical Chemistry

Access to Document

10.1016/S0040-6031(01)00431-2

Cite this

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

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.",

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AU - Kakihana, Masato

AU - Yoshimura, Masahiro

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