Thermal expansion of type A carbonate apatite

Toru Tonegawa, Toshiyuki Ikoma, Yasushi Suetsugu, Naoki Igawa, Yoshitaka Matsushita, Tomohiko Yoshioka, Nobutaka Hanagata, Junzo Tanaka

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Type A carbonate apatite powder, in which carbonate ion was completely substituted for the hydroxyl site, was synthesized by heating a low crystalline and stoichiometric hydroxyapatite powder under flow of a dry carbon dioxide gas at 1000 °C for 24 h. Its chemical formula was determined to be Ca 10(PO4)6(CO3) 0.93±0.06 from compositional and infrared spectroscopic analyses. The X-ray and neutron diffraction patterns of type A carbonate apatite showed the extra diffractions attributed to monoclinic symmetry with the space group Pb. The thermal expansion property of the type A carbonate apatite was determined from neutron powder diffraction data at 25, 200, 400 and 500 °C. The extra diffractions attributed to the monoclinic symmetry were not diminished at the high temperatures. The thermal lattice expansion coefficients were, for the first time, calculated to be αa = 13.1 × 10 -6 °C-1, αb = 34.9 × 10 -6 °C-1 and αc = 8.1 × 10 -6 °C-1 by using a Le Bail refinement.

Original languageEnglish
Pages (from-to)171-175
Number of pages5
JournalMaterials Science and Engineering B: Solid-State Materials for Advanced Technology
Volume173
Issue number1-3
DOIs
Publication statusPublished - 2010
Externally publishedYes

Fingerprint

Apatite
apatites
Thermal expansion
Carbonates
thermal expansion
carbonates
Powders
Diffraction
diffraction
Neutron powder diffraction
Durapatite
Neutron diffraction
Carbon Dioxide
Hydroxyl Radical
Diffraction patterns
symmetry
Gases
Hydroxyapatite
Ions
Crystalline materials

Keywords

  • Neutron powder diffraction
  • Thermal expansion
  • Type A carbonate apatite
  • Whole powder fitting method

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

Cite this

Thermal expansion of type A carbonate apatite. / Tonegawa, Toru; Ikoma, Toshiyuki; Suetsugu, Yasushi; Igawa, Naoki; Matsushita, Yoshitaka; Yoshioka, Tomohiko; Hanagata, Nobutaka; Tanaka, Junzo.

In: Materials Science and Engineering B: Solid-State Materials for Advanced Technology, Vol. 173, No. 1-3, 2010, p. 171-175.

Research output: Contribution to journalArticle

Tonegawa, T, Ikoma, T, Suetsugu, Y, Igawa, N, Matsushita, Y, Yoshioka, T, Hanagata, N & Tanaka, J 2010, 'Thermal expansion of type A carbonate apatite', Materials Science and Engineering B: Solid-State Materials for Advanced Technology, vol. 173, no. 1-3, pp. 171-175. https://doi.org/10.1016/j.mseb.2010.02.008
Tonegawa, Toru ; Ikoma, Toshiyuki ; Suetsugu, Yasushi ; Igawa, Naoki ; Matsushita, Yoshitaka ; Yoshioka, Tomohiko ; Hanagata, Nobutaka ; Tanaka, Junzo. / Thermal expansion of type A carbonate apatite. In: Materials Science and Engineering B: Solid-State Materials for Advanced Technology. 2010 ; Vol. 173, No. 1-3. pp. 171-175.
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