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自由電弧法與等離子電弧法制備超細(xì)粉末對比研究
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Contrast Study on Free Arc Method and Arc Plasma Method for Ultrafine Powder Preparation
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    摘要:

    采用自由電弧法和等離子電弧法分別制備超細(xì)SnO2粉末，利用X射線衍射(XRD), 掃描電鏡(SEM)及能譜分析(EDAX)測試手段對樣品的物相、形貌、粒度等進(jìn)行表征。結(jié)果發(fā)現(xiàn)：等離子電弧法制備出的粉末粒度較小，粒子均勻，大部分為球形，且雜質(zhì)少；而自由電弧法制備的粉末粒度較大，且含有大量的C雜質(zhì)。通過對粉末的形核長大機(jī)制進(jìn)行分析討論，發(fā)現(xiàn)溫度、溫度梯度、飽和度是形核長大的重要影響因素。等離子電弧法容易獲得較高的溫度及溫度梯度，有助于粉末的形核長大，獲得較高的形核率，易制得超細(xì)粉末

    Abstract:

    Ultrafine SnO2 nanopowder was prepared by a free arc method and an arc plasma method, respectively. Then the phases, morphology and particle size were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and energy dispersive spectrometry (EDS). The results show that the powder prepared by the arc plasma method has uniform particles with smaller size and fewer impurities, which are mostly spherical; while the powder prepared by the free arc method has bigger particle size and much C impurities. Nucleation and growth mechanism of the powder was analyzed and it is found that the temperature, temperature gradient and saturation are significant influencing factors. Arc plasma method has easily higher temperature and temperature gradient, so it is favorable for nucleation and growth to obtain high nucleation rate

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孫麗達(dá),竺培顯,陳敬超,周生剛.自由電弧法與等離子電弧法制備超細(xì)粉末對比研究[J].稀有金屬材料與工程,2010,39(6):1085~1088.[Sun Lida, Zhu Peixian, Chen Jingchao, Zhou Shenggang. Contrast Study on Free Arc Method and Arc Plasma Method for Ultrafine Powder Preparation[J]. Rare Metal Materials and Engineering,2010,39(6):1085~1088.]
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  • 收稿日期:2009-06-12
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