EFFECT OF ULTRASONIC VIBRATION ON THE PARTICLE SIZE DISTRIBUTION OF HYDROXYAPATITE CHEMICALLY PRECIPITATED FROM EGGSHELLS

GREGORIO VARGAS; JORGE LÓPEZ; JORGE L. ACEVEDO; JORGE ROMERO; JUAN MENDÉZ; MANUEL MENDÉZ

doi:10.3363/prb1992.10.0_250

Phosphorus Research Bulletin

Online ISSN : 1882-2363
Print ISSN : 0918-4783
ISSN-L : 0918-4783

EFFECT OF ULTRASONIC VIBRATION ON THE PARTICLE SIZE DISTRIBUTION OF HYDROXYAPATITE CHEMICALLY PRECIPITATED FROM EGGSHELLS

GREGORIO VARGAS, JORGE LÓPEZ, JORGE L. ACEVEDO, JORGE ROMERO, JUAN MENDÉZ, MANUEL MENDÉZ

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JOURNAL FREE ACCESS

1999 Volume 10 Pages 250-255

DOI https://doi.org/10.3363/prb1992.10.0_250

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Abstract

The effect of ultrasonic vibration on the particle size distribution of hydroxyapatite chemically precipitated from eggshells and H₃PO₄, or alternatively from calcium acetate and Na₃PO₄?12H₂O, was evaluated. For the case of hydroxyapatite aqueous suspensions with pH>10, with no particle-dispersing agent added, the average particle size decreased from 40 to 3μm in five minutes by employing an ultrasonic power of 61.75 watts and a frequency of 20 KHz.

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