TY - JOUR
T1 - Dispersing behavior of hydroxyapatite powders produced by wet-chemical synthesis
AU - Pretto, Michele
AU - Costa, Anna Luisa
AU - Landi, Elena
AU - Tampieri, Anna
AU - Galassi, Carmen
PY - 2003/1/1
Y1 - 2003/1/1
N2 - Three hydroxyapatite powders with different surface properties were produced by wet-chemical synthesis and characterized. The electrokinetic properties of powders dispersed in water were investigated by electroacoustic spectroscopy measurements. The different surface reactivity (pHiep and ζ potential versus pH curves) was related to the interplay of dissolution and adsorption of Ca2+ ions. With a view toward the preparation of porous bodies by sponge impregnation, the behavior of powder suspensions was studied. Four deflocculants were tested, and the optimum dispersing conditions for each powder were found. Anionic polyelectrolytes resulted in the best effective dispersing agent, with different optimum amounts added to the suspensions.
AB - Three hydroxyapatite powders with different surface properties were produced by wet-chemical synthesis and characterized. The electrokinetic properties of powders dispersed in water were investigated by electroacoustic spectroscopy measurements. The different surface reactivity (pHiep and ζ potential versus pH curves) was related to the interplay of dissolution and adsorption of Ca2+ ions. With a view toward the preparation of porous bodies by sponge impregnation, the behavior of powder suspensions was studied. Four deflocculants were tested, and the optimum dispersing conditions for each powder were found. Anionic polyelectrolytes resulted in the best effective dispersing agent, with different optimum amounts added to the suspensions.
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U2 - 10.1111/j.1151-2916.2003.tb03510.x
DO - 10.1111/j.1151-2916.2003.tb03510.x
M3 - Article
AN - SCOPUS:0141904465
VL - 86
SP - 1534
EP - 1539
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
SN - 0002-7820
IS - 9
ER -