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Formation of Calcium Phosphate Whiskers in Hydrogen Peroxide (H 2 O 2 ) Solutions at 90°C
Author(s) -
Tas A. Cuneyt
Publication year - 2007
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2007.01768.x
Subject(s) - whiskers , octacalcium phosphate , hydrogen peroxide , apatite , nuclear chemistry , calcium , phosphate , materials science , mineralogy , molar ratio , chemistry , chemical engineering , inorganic chemistry , metallurgy , composite material , catalysis , organic chemistry , engineering
A novel, one‐pot technique of synthesizing calcium phosphate whiskers was developed. Commercially available β‐tricalcium phosphate (β‐Ca 3 (PO 4 ) 2 ) powders were aged in unstirred 30% H 2 O 2 solutions at 90°C for 48 h in ordinary glass media bottles. Resultant samples consisted of whiskers (200 nm wide and 5 μm‐long) of a biphasic mixture of octacalcium phosphate (OCP: Ca 8 H 2 (PO 4 ) 6 ·5H 2 O) and carbonated apatitic (apatite‐like) calcium phosphate (Ap‐CaP). As‐formed whiskers possessed a Ca/P molar ratio of 1.46 and a BET surface area of 8 m 2 /g. Upon soaking these whiskers in a Tris‐HCl‐buffered SBF solution of 27 mM HCO 3 − for 6 days, Ca/P molar ratio and surface area values were increased to 1.60 and 52 m 2 /g, respectively. The technique, owing to its simplicity, may prove useful in providing large amounts of biocompatible short whiskers for numerous technology sectors.