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首页> 外文期刊>Combustion Science and Technology >PREPARATION AND PHASE EVOLUTION OF WOLLASTONITE BY SOL-GEL COMBUSTION METHOD USING SUCROSE AS THE FUEL
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PREPARATION AND PHASE EVOLUTION OF WOLLASTONITE BY SOL-GEL COMBUSTION METHOD USING SUCROSE AS THE FUEL

机译：以蔗糖为燃料的溶胶-凝胶燃烧法制备硅灰石及其相演化

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摘要

Wollastonite is a bioactive material (molecular formula of CaSiO_3) that belongs to the class of calcium silicate. It is widely used as a bone regenerative material and as a drug delivery carrier due to its high bioactivity and biocompatibility. A novel sol-gel combustion synthesis has been adopted by using sucrose as a fuel and nitric acid as an oxidizer to synthesize wollastonite. Calcium nitrate and tetraethyl orthosilicate were taken as the source of calcium and silicate. The obtained powders were characterized by powder X-ray diffraction to check the phase formation and Fourier transform infrared (FT-IR) spectroscopy for the identification of the characteristic functional group. The average particle size calculated by using Scherer's formula is 51.7nm, and the lattice parameter values are found to be a = 15.4301A, b = 7.3242A, and c=7.017A. The phase transformation studies were carried out by using a thermogravimetric analyzer. The morphology of the pure wollastonite was imaged by using scanning electron microscopy and atomic force microscopy; the images shows irregular spheroid-shaped particles.
机译：硅灰石是一种生物活性材料（分子式为CaSiO_3），属于硅酸钙类别。由于其高生物活性和生物相容性，它被广泛用作骨再生材料和药物输送载体。以蔗糖为燃料，以硝酸为氧化剂，合成了硅灰石，采用了新颖的溶胶-凝胶燃烧合成方法。硝酸钙和原硅酸四乙酯作为钙和硅酸盐的来源。通过粉末X射线衍射对所得粉末进行表征，以检查相形成，并通过傅立叶变换红外（FT-IR）光谱对特征性官能团进行鉴定。通过使用Scherer公式计算的平均粒径为51.7nm，并且晶格参数值被发现为a ＝ 15.4301A，b ＝ 7.3242A，和c ＝ 7.017A。通过使用热重分析仪进行相变研究。用扫描电子显微镜和原子力显微镜对纯硅灰石的形态进行成像。图像显示不规则球状颗粒。

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