Research of phase transformation induced biodegradable properties on hydroxyapatite and tricalcium phosphate based bioceramic

Kuo Tien Chu, Shih Fu Ou, Shyuan Yow Chen, Shi Yung Chiou, Hsin Hua Chou, Keng Liang Ou

研究成果: 雜誌貢獻文章同行評審

26 引文 斯高帕斯(Scopus)

摘要

Biodegradable calcium phosphate composites consisting of tricalcium phosphate (α-TCP) and hydroxyapatite (HA) were prepared using a two-step sintering method. The ratio of α-TCP/HA was controlled by modulating the sintering temperature. The initial calcination process at 800 °C causes HA dehydroxylation and induces the early transformation of HA into α-TCP in subsequent sintering processes. At the optimum sintering temperature of 1300 °C, the material is comprised of a moderate ratio of α-TCP to HA (3:7) and possesses a hardness of 5.0 GPa. The high temperature phase transformation from HA to α-TCP accompanied by bonded water loss, which results in the formation of nano-pores within the α-TCP matrix, hardly deteriorated the mechanical strength of the composite. This pore-containing structure also provided a convincing evidence for the origin of the high degradability of α-TCP in a biological environment.
原文英語
頁(從 - 到)1455-1462
頁數8
期刊Ceramics International
39
發行號2
DOIs
出版狀態已發佈 - 三月 2013

ASJC Scopus subject areas

  • 陶瓷和複合材料
  • 製程化學與技術
  • 電子、光磁材料
  • 表面、塗料和薄膜
  • 材料化學

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