Effect of Ca/P ratio and milling material on the mechanochemical preparation of hydroxyapaptite.
The mechanochemical transformation of Ca(OH)(2)-(NH(4))(2)HPO(4) with different Ca/P ratios 1; 1.5; 1.67 and 1.75 was carried out for different periods of time from 10 min to 24 h in a horizontal vibration mill using steel and agate vials and balls. The phase transformations obtained at each milling stage were characterized by X-ray diffraction, infrared spectroscopy and transmission electron microscopy. Complete transformation to hydroxyapatite took place during the first 5 h of milling, for Ca/P ratios 1.5 to 1.7, when milling was carried out with steel vials and balls. The contamination was not significant for the periods of milling studied for both milling media.
Salas
Janeth
J
Centro de Química, Instituto Venezolano de Investigaciones Científicas, IVIC, Apdo. Postal 21827, Caracas 1020, Venezuela. jsalas@ivic.ve
Benzo
Zully
Z
Gonzalez
Gema
G
Marcano
Eunice
E
Gómez
Clara
C
D000268:Adhesiveness; D001842:Bone and Bones / Q000473:pathology; D002130:Calcium Phosphates / Q000737:chemistry*; D002516:Ceramics; D003460:Crystallization; D017886:Durapatite / Q000737:chemistry*; D008422:Materials Testing; D046529:Microscopy, Electron, Transmission / Q000379:methods; D053758:Nanoparticles; D009985:Orthopedics / Q000379:methods; D011208:Powders; D011312:Pressure; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods; D013314:Stress, Mechanical; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors; D014961:X-Ray Diffraction
D002130:Calcium Phosphates; D011208:Powders; C485817:beta-tricalcium phosphate; D017886:Durapatite; C020243:calcium phosphate