Characterization and thermal behavior of calcium deficient hydroxyapatite whiskers with various Ca/P ratios

Hongquan Zhang, Ming Zhang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

38 Citations (Scopus)


Calcium deficient hydroxyapatite (Ca-def HA) whiskers with various Ca/P ratios were synthesized by a homogeneous hydrothermal precipitation method using acetamide. They had high crystallinity for Ca/P > 1.54, with a mean length of 79-113 μm and an aspect ratio of 85-103. No whisker entanglement and aggregation were found in the products. Thermal analyses revealed that the Ca/P ratio and crystallinity of the products showed significant effects on the crystalline phase, constitution and morphological stability of the whiskers at an elevated temperature. The whiskers with Ca/P > 1.54 were morphologically stable at temperatures below 1200 °C, with minor TCP appearance after heat-treatment at 800 °C; no further decomposition of the whiskers was found with increasing temperature. Such whiskers are possibly one promising reinforcing materials for preparing highly reliable apatite ceramics and composites either in dense or porous block materials with high mechanical properties and good enhanced biological performance.
Original languageEnglish
Pages (from-to)642-648
Number of pages7
JournalMaterials Chemistry and Physics
Issue number3
Publication statusPublished - 15 Apr 2011


  • Biomaterials
  • Calcium deficient hydroxyapatite whiskers
  • Crystal growth
  • Microstructure
  • Thermal properties

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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