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Effect of Ca/P Ratio on the Dissolution of Calcium Phosphate Powders

机译：Ca / P比对磷酸钙粉体溶解的影响

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Calcium phosphate ceramics (CPC) have been attractively used in different areas of biomedical applications, such as substances of artificial hard tissue replacement implants, drug delivery system due to their biocompatibility and bioactivity. In this work, three calcium phosphate powders between Ca/P molar ratio 1.50-1.67 were synthesized by aqueous precipitation method, using the mixture of Ca(NO_3)_2·4H_2O and H_3PO_4 solutions to ammonia solution. During the precipitation reaction, Ca/P molar ratio was adjusted by controlling pH of the solution between 8.0 and 10.5 by the addition of ammonium hydroxide solution. All powders were treated at 800 ℃ for 2 hrs. The calcined powders were immersed in pH 7.4 distilled water at 37℃ for 3 and 7 days. Decomposition and related dissolution with the various Ca/P ratios were investigated by XRD, FT-IR, and TEM observation.
机译：由于其生物相容性和生物活性，磷酸钙陶瓷（CPC）已在生物医学应用的不同领域中得到了有吸引力的应用，例如人造硬组织替代植入物，药物递送系统等物质。本工作采用Ca（NO_3）_2·4H_2O和H_3PO_4溶液与氨水的混合物，通过水相沉淀法合成了三种Ca / P摩尔比为1.50-1.67的磷酸钙粉末。在沉淀反应期间，通过添加氢氧化铵溶液将溶液的pH控制在8.0至10.5之间来调节Ca / P摩尔比。所有粉末均在800℃下处理2小时。将煅烧的粉末浸入37℃的pH 7.4蒸馏水中3天和7天。通过XRD，FT-IR和TEM观察研究了各种Ca / P比值下的分解和相关溶解。

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