Microstructural Observation of Calcium-Deficient Single Crystal Apatite Fibers and Phase Changes during Heating

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Three types of calcium-deficient apatite fibers (Ca-def AF) were synthesized by a homogeneous precipitation method using starting solution with Ca/P ratios of 1.00, 1.50 and 1.67, and then the resulting fibers were characterized by XRD, FT-IR and SEM. Especially, the microstructure including strain and defect of individual Ca-def AF was examined by transmission electron microscopy (TEM). All the resulting Ca-def AFs had a single phase of apatite, and contained carbonate ions. These fibers were of single crystal, and highly strained. However, when Ca-def AFs were heated to higher than 800 °C, they changed to HAp and TCP biphases. The content of the carbonate group in the Ca-def AFs decreased with heating temperature.

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Periodical:

Key Engineering Materials (Volumes 361-363)

Main Theme:

Edited by:

Guy Daculsi and Pierre Layrolle

Pages:

147-150

Citation:

A. Taki et al., "Microstructural Observation of Calcium-Deficient Single Crystal Apatite Fibers and Phase Changes during Heating", Key Engineering Materials, Vols. 361-363, pp. 147-150, 2008

Online since:

November 2007

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