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Synthesis and Characterization of Hydroxyapatite–Wollastonite Composite Powders by Sol–Gel Processing
Author(s) -
EncinasRomero Martín A.,
AguayoSalinas Salvador,
Castillo Santos J.,
CastillónBarraza Felipe F.,
Castaño Víctor M.
Publication year - 2008
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/j.1744-7402.2008.02212.x
Subject(s) - wollastonite , materials science , distilled water , hydrochloric acid , calcium carbonate , nuclear chemistry , raman spectroscopy , sol gel , composite number , thermogravimetric analysis , composite material , calcium , chemical engineering , thermal analysis , thermal , metallurgy , organic chemistry , chemistry , nanotechnology , chromatography , raw material , physics , engineering , meteorology , optics
Composites of hydroxyapatite–wollastonite were synthesized by a sol–gel route using calcium acetate and triethyl phosphate as precursors of hydroxyapatite and high‐purity natural wollastonite added in ratios of 20, 50, and 80 wt%. These composites were characterized by thermal analysis, X‐ray diffraction, FT‐IR and Raman spectroscopy, and scanning and transmission electron microscopic techniques. Formation of hydroxyapatite occurs at a relatively low temperature, about 420°C, accompanied by calcium carbonate; wollastonite remains unreacted. The composites were purified by heat treatment to a higher temperature and washed with hydrochloric acid and distilled water, to produce B‐type carbonated hydroxyapatite–wollastonite composites as final products.