Publication Date:
2015-07-15
Description:
In the present study, a new single phase Si–Ca–P-based ceramic was obtained by conventional sintering of compacted mixtures of calcium hydrogen phosphate anhydrous, calcium carbonate, and silicon oxide. The synthesis conditions were the followings: heated up to 1550°C for a total period of time of 72 h (3 d), with quenching in liquid nitrogen, milling, pressing, and reheating every 24 h. Second, heating at 1300°C/3 h and subsequent annealed at 1200°C/24 h. Mineralogical and microstructural characterization of the obtained Si–Ca–P-based material was determined by Differential Thermal Analysis, X-ray diffraction, Scanning Electron Microscopy with attached wavelength dispersive spectroscopy, Micro-Raman and Fourier Transform Infrared Spectrometer. The results showed a single Si–Ca–P phase material with a Ca 2 SiO 4 /Ca 3 (PO 4 ) 2 molar ratio equal to 2:1. The parameters of the Weibull distribution of strength, determined by diametrical compression of disks, were: modulus, m = 13, and characteristic strength σ 0 = 0.60 MPa.
Print ISSN:
0002-7820
Electronic ISSN:
1551-2916
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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