Hydroxyapatites Produced by Wet-Chemical Methods
Hydroxyapatite samples were produced by two different wet-chemical methods, and characterized by X-ray diffraction, infrared (IR), thermal gravimetric analysis (TGA), scanning electron microscopy, energy-dispersive X-ray spectroscopy, inductively coupled plasma atomic emission spectrometry, and compression strength measurements. The IR spectra showed the presence of CO32− ions in all samples. After the sintering, the CO32− bands almost disappeared, indicating a large release of CO32− ions by the samples, which were also confirmed by TGA. By mixing samples produced by both methods, a bioceramic was prepared and, after sintering at 900°C for 1 h, compressive strengths of 26–30 MPa were obtained.
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Document Type: Research Article
Affiliations: Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Cx. P. 476, 88040-900, Brazil
Publication date: 2005-08-01