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溶膠-凝膠法制備La2O3納米粉體
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TG147

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國(guó)家自然科學(xué)基金資助項(xiàng)目(50071043)


Preparation of Nanocrystalline La2O3 by Sol-Gel Method
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    摘要:

    以普通La2O3,硝酸,聚乙二醇為原料,利用溶膠-凝膠法制備了納米La2O3粉體,利用TG-DTA,XRD,TEM等各種測(cè)試方法對(duì)干凝膠300℃灼燒所得前驅(qū)體粉末的分解過(guò)程及最終形成的納米氧化鑭粉體進(jìn)行了分析和表征,并研究了濃度、攪拌和分散劑聚乙二醇(PEG)添加量等因素的改變對(duì)La2O3粉體的粒徑、形態(tài)的影響.實(shí)驗(yàn)結(jié)果表明,在適當(dāng)工藝參數(shù)下,可以制得平均粒徑小于50 nm的La2O3粉體.

    Abstract:

    Nanocrystalline La2O3 was prepared by sol-gel process using common La2O3, HNO3 and PEG. The decomposition process of the precursor powder and the calcened nanocrystalline La2O3 formed at the end were charactered with various techniques: TG-DTA, XRD and TEM and the effects of some factors such as pH value of the solution, stirring rate and the amount of the PEG in the solution on the particle size and morphology are investigated. The result shows that the nanocrystalline La2O3 can be obtained with particle diameter of 30 nm~50 nm under appropriate conditions.

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王茂林 王新剛 楊志懋 王亞平 丁秉鈞.溶膠-凝膠法制備La2O3納米粉體[J].稀有金屬材料與工程,2005,34(3):425~428.[Wang Maolin, Wang Xingan, Yang Zhimao, Wang Yaping, Ding Bingjun. Preparation of Nanocrystalline La2O3 by Sol-Gel Method[J]. Rare Metal Materials and Engineering,2005,34(3):425~428.]
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  • 最后修改日期:2003-09-04
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