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首页> 外文会议>13th International Symposium on Ceramics in Medicine and the Annual Meeting of the International Society for Ceramics in Medicine 22-26 November 2000 Bologna, Italy >Dry Mechanochemical Synthesis of Apatites and other Calcium Phosphates
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Dry Mechanochemical Synthesis of Apatites and other Calcium Phosphates

机译：磷灰石和其他磷酸钙的干式机械化学合成

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摘要

Poorly crystallized hydroxyapatite (HAp) or calcium deficient hydroxyapatite (CDHAp) was obtained by grinding, under dry conditions, dicalcium phosphate dihydrate and calcium oxide mixtures with different calcium-to-phosphate ratios (Ca/P) ranged from 1.50 to 1.70. Grinding was carried out during 6 hours with a rotating micromill, 500-ml mortar, 5 balls 27 mm PHI, at 350 rpm. The resulting powder has a mean particle size of around 12 mum. By heatin the ground powders at 900 deg C for 2 h, well crystallized beta-tricalcium phosphate (beta-TCP) was obtained when ca/P was 1.50, stoichometric HAp when Ca/P was 1.70 and beta-TCP - HAp mixtures for 1.50 < Ca/P < 1.70.
机译：通过在干燥条件下研磨磷酸二钙二水合物和氧化钙混合物（钙/磷比范围从1.50至1.70不等），可以得到结晶不良的羟基磷灰石（HAp）或钙缺乏的羟基磷灰石（CDHAp）。用旋转微型磨机，500 ml研钵，5球27 mm PHI在350 rpm的转速下研磨6个小时。所得粉末的平均粒度为约12μm。通过将研磨的粉末在900摄氏度下加热2小时，当ca / P为1.50时获得结晶良好的磷酸β-三钙（beta-TCP），当Ca / P为1.70时获得化学计量的HAp，并获得1.50的beta-TCP-HAp混合物

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