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    刘孟彬, 李蔚, 杨爱霞. 共沉淀法低温合成 β-CaSiO3纳米粉体[J]. 华东理工大学学报（自然科学版）, 2011, (3): 315-319.
    引用本文: 刘孟彬, 李蔚, 杨爱霞. 共沉淀法低温合成 β-CaSiO3纳米粉体[J]. 华东理工大学学报（自然科学版）, 2011, (3): 315-319.
    shu
    LIU Meng-bin, LI Wei, YANG Ai-xia. Low Temperature Preparation of β-CaSiO3 Nanopowder via Coprecipitation Process[J]. Journal of East China University of Science and Technology, 2011, (3): 315-319.
    Citation: LIU Meng-bin, LI Wei, YANG Ai-xia. Low Temperature Preparation of β-CaSiO3 Nanopowder via Coprecipitation Process[J]. Journal of East China University of Science and Technology, 2011, (3): 315-319.
    shu

    共沉淀法低温合成 β-CaSiO3纳米粉体

    Low Temperature Preparation of β-CaSiO3 Nanopowder via Coprecipitation Process

      摘要
    • 摘要: 以正硅酸乙酯和硝酸钙为原料，采用共沉淀法低温制备了β-CaSiO3纳米粉体。系统讨论了沉淀剂、滴加方式、合成体系温度及溶剂等因素对粉体合成的影响；采用XRD ，SEM和BET等手段对β-CaSiO3粉体的物相、颗粒的形貌及粉体的比表面积进行了表征。结果表明：在25 ℃下，用NaOH溶液做沉淀剂，乙醇做溶剂，采用逐滴加入NaOH溶液的方式合成的沉淀前驱体比较均匀，该沉淀前驱体经过680 ℃煅烧便可以得到纯的β-CaSiO3；扫描照片显示,在7

       

      Abstract: β-CaSiO3 powders were synthesized through a chemical coprecipitation process by using Ca(NO3)2·4H2O and Si(OC2H5)4 as raw materials. The effects of the precipitating agent, dropping way of precipitant, temperature and solvent on the preparation ofβ-CaSiO3 powders were investigated systematically. The morphology and specific surface area ofβ-CaSiO3 powders were characterized by means of XRD, SEM and BET. The results showed that well-distributed intermediate products were obtained by using NaOH as precipitant, ethanol as solvent and adding NaOH solution drop by drop at 25 °C. Pureβ-CaSiO3 was obtained by heating the intermediate product at 680 °C for 2 h. Rod-likeβ-CaSiO3 crystals were obtained at 700 °C as observed by SEM.

       

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