Production of nano-sized hydroxyapatite crystals calcined with poly(acrylic acid calcium salt) used as an anti-sintering agent

Masahiro Okada, Tsutomu Furuzono

Research output: Contribution to conferencePaper

Abstract

The calcined hydroxyapatite (HAp) nano-crystals having good dispersibility in media were successfully prepared by the calcination of low crystallized HAp particles at 800°C for 1 h in the presence of poly(acrylic acid calcium salt) (PAA-Ca) coated on the particle surfaces, and subsequent removal of CaO, which was the thermal decomposed product of PAA-Ca. In the case of the calcination without PAA-Ca, large agglomerates consisting of sintered HAp polycrystals were observed after the product was dispersed in ethanol medium. On the other hand, in the case of the calcination with PAA-Ca coated on the particle surfaces, the size of the HAp crystal dispersed in ethanol medium was corresponded to that of the HAp single crystal determined from electron micrographs, which indicates that the sintering among the HAp particles during the calcination could be avoided by preventing the contact among the HAp particles by PAA-Ca coating.

Original languageEnglish
Number of pages1
Publication statusPublished - Dec 1 2005
Externally publishedYes
Event54th SPSJ Annual Meeting 2005 - Yokohama, Japan
Duration: May 25 2005May 27 2005

Other

Other54th SPSJ Annual Meeting 2005
CountryJapan
CityYokohama
Period5/25/055/27/05

Keywords

  • Acrylic acid
  • Composite
  • Covalent bonding
  • Nano-sized hydroxyapatite particle
  • Sintering

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Okada, M., & Furuzono, T. (2005). Production of nano-sized hydroxyapatite crystals calcined with poly(acrylic acid calcium salt) used as an anti-sintering agent. Paper presented at 54th SPSJ Annual Meeting 2005, Yokohama, Japan.