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正交設(shè)計(jì)法優(yōu)化高分散超細(xì)銀粉的制備工藝
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湖南省科技重大專項(xiàng) (2009FJ1002-3)


Optimization for Preparation Technique of Highly Dispersive Ultrafine Silver Powders by Orthogonal Design
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    摘要:

    以AgNO3為銀源，抗壞血酸為還原劑，通過液相還原法制備了超細(xì)銀粉。運(yùn)用L25(56)的正交試驗(yàn)設(shè)計(jì)，考察了AgNO3濃度、抗壞血酸濃度、分散劑種類、分散劑用量、溶液pH值及反應(yīng)溫度對(duì)超細(xì)銀粉的分散性及粒度的影響。分析得出制備超細(xì)銀粉的優(yōu)化條件：AgNO3濃度為0.15 mol·L-1，抗壞血酸濃度為0.40 mol·L-1，油酸為分散劑，分散劑用量為8%（相對(duì)AgNO3質(zhì)量），pH值為4，反應(yīng)溫度為50 ℃。在優(yōu)化的實(shí)驗(yàn)條件下，制備出高分散近球形的超細(xì)銀粉，其平均粒度為0.89 μm。并運(yùn)用SEM、XRD對(duì)其進(jìn)行了表征。

    Abstract:

    Using ascorbic acid (C6H8O6) as the reducing agent and AgNO3 as the source of Ag, the ultrafine silver powders were prepared by a liquid phase reduction method. By means of the orthogonal design method of six factors and five levels, the effects of the following factors on the dispersion and particles size of silver powders were studied, such as the concentration of AgNO3, the concentration of C6H8O6, the selection of dispersers, the doses of disperser, pH and the temperature. The optimized conditions for the ultrafine silver powders preparation were obtained. The pure ultrafine silver powders with near-spherical shape and mean diameter of 0.89 μm can be synthesized under the conditions of AgNO3 concentration of 0.15 mol·L-1, C6H8O6 concentration of 0.40 mol·L-1, oleic acid (C18H34O2) as disperser, C18H34O2/AgNO3 mass ratio of 8:100, pH=4 and at 50 oC. The ultrafine silver powders were characterized by scanning electron microscopy (SEM) and XRD

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郭桂全,甘衛(wèi)平,羅 賤,向 鋒,張金玲,周 華,劉 歡.正交設(shè)計(jì)法優(yōu)化高分散超細(xì)銀粉的制備工藝[J].稀有金屬材料與工程,2011,40(10):1827~1831.[Guo Guiquan, Gan Weiping, Luo Jian, Xiang Feng, Zhang Jinling, Zhou Hua, Liu Huan. Optimization for Preparation Technique of Highly Dispersive Ultrafine Silver Powders by Orthogonal Design[J]. Rare Metal Materials and Engineering,2011,40(10):1827~1831.]
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  • 收稿日期:2010-10-25
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