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首页> 外文期刊>Journal of Materials Research >Preparation and sintering of CaSiO_3 from coprecipitated powder using NaOH as precipitant and its apatite formation in simulated body nuid solution
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Preparation and sintering of CaSiO_3 from coprecipitated powder using NaOH as precipitant and its apatite formation in simulated body nuid solution

机译：以NaOH为沉淀剂由共沉淀粉末制备和烧结CaSiO_3及其在模拟体液中的磷灰石形成。

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摘要

CaSiO_3 powders were prepared from an ethanol solution dissolving Ca(NO_3)_2. 4H_2O and Si(OC_2H_5)_4 by the coprecipitation method using various concentrations of NaOH as precipitants. Some Na component remained in the precipitates without washing and strongly affected the characteristics of the resultant powders, but the Na residue was removed by a washing treatment. The precipitate prepared by using 0.33 mol/l of NaOH and twice-washing contained the lowest amount of Na residue. It was calcined at 500 and 900 deg C, respectively, to crystallize CaSiO_3 phase and ground by a planetary potmill. The ground CaSiO_3 powder was sintered to about 89 theoretical density by firing at l400 deg C. By soaking the CaSiO_3 sintered bodies in simulated body fluid (SBF) solution fOr various times, an hydroxylapatite (HAp) layer formed as aggregates of ball-like particles on the surface of the CaSiO_3 sintered bodies after soaking for a short period; thereby, the CaSiO_3 ceramics is suggested to have very good biocompatibility.
机译：由溶解Ca（NO_3）_2的乙醇溶液制备CaSiO_3粉末。 4H_2O和Si（OC_2H_5）_4的共沉淀法，使用各种浓度的NaOH作为沉淀剂。一些Na成分未经洗涤就残留在沉淀中，并且强烈影响所得粉末的特性，但是通过洗涤处理除去了Na残留物。通过使用0.33 mol / l NaOH和两次洗涤制备的沉淀物含有最低量的Na残留物。将其分别在500和900摄氏度下煅烧，以使CaSiO_3相结晶并通过行星磨机进行研磨。研磨的CaSiO_3粉末通过在1400摄氏度下烧结而烧结到理论密度约89。通过将CaSiO_3烧结体浸泡在模拟体液（SBF）溶液中多次，羟基磷灰石（HAp）层形成为球形颗粒的聚集体短时间浸泡后在CaSiO_3烧结体的表面上；因此，建议CaSiO 3陶瓷具有非常好的生物相容性。

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