• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Applied Surface Science >Preparation and dispersive mechanism of highly dispersive ultrafine silver powder
【24h】

Preparation and dispersive mechanism of highly dispersive ultrafine silver powder

机译：高分散超细银粉的制备及分散机理

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Using ascorbic acid as the reducing agent, AgNO_3 as the source of Ag, the ultrafine silver powder was prepared by liquid-phase reduction method. The optimal conditions to prepare the ultrafine silver powder were obtained by studying the effects of following factors, such as the selection of dispersant, the doses of dispersant and pH, on the dispersibility of silver powder under other constant conditions. The pure ultrafine silver powder with quasi-spherical shape and mean size of 1.15μm was synthesized under the optimal conditions of polyvinyl alcohol (PVA) as disperses PVA/AgNO_3 mass ratio of 4:100 and pH 7 while maintaining other conditions exactly in the same circumstances, such as AgNO_3 concentration of 0.20mol L~(-1), ascorbic acid concentration of 0.15 mol L~(-1) and reaction temperature of 40℃. The ultrafine silver powder was characterized by SEM and XRD. And a PVA dispersive mechanism for preparing highly dispersive ultrafine silver powder, proved by the ultraviolet spectra, is that PVA absorbed on the surface of silver particles by coordination bond preventing the silver particles from diffusion and aggregation. In addition, the steric effect may help to reduce aggregation.
机译：以抗坏血酸为还原剂，以AgNO_3为Ag源，通过液相还原法制备了超细银粉。通过研究分散剂的选择，分散剂的用量和pH值对其他恒定条件下银粉分散性的影响，获得了制备超细银粉的最佳条件。在聚乙烯醇（PVA）的最佳条件下，将PVA / AgNO_3的质量比为4：100，pH值为7，同时保持其他条件完全相同，合成了准球形，平均尺寸为1.15μm的纯超细银粉。 AgNO_3浓度为0.20mol L〜（-1），抗坏血酸浓度为0.15 mol L〜（-1），反应温度为40℃。用SEM和XRD对超细银粉进行了表征。紫外光谱证明，制备高分散超细银粉的PVA分散机理是PVA通过配位键吸收在银颗粒表面，阻止了银颗粒的扩散和聚集。另外，空间效应可以帮助减少聚集。

著录项

  • 来源
    《Applied Surface Science》 |2010年第22期|p.6683-6687|共5页
  • 作者

    Guiquan Guo; Weiping Gan; Jian Luo; Feng Xiang; Jinling Zhang; Hua Zhou; Huan Liu;

  • 作者单位

    School of Materials Science and Engineering, Central South University, No. 932, Lushan South Road, Changsha 410083, PR China,College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang 455002, PR China;

    School of Materials Science and Engineering, Central South University, No. 932, Lushan South Road, Changsha 410083, PR China;

    School of Materials Science and Engineering, Central South University, No. 932, Lushan South Road, Changsha 410083, PR China;

    School of Materials Science and Engineering, Central South University, No. 932, Lushan South Road, Changsha 410083, PR China;

    School of Materials Science and Engineering, Central South University, No. 932, Lushan South Road, Changsha 410083, PR China;

    School of Materials Science and Engineering, Central South University, No. 932, Lushan South Road, Changsha 410083, PR China;

    School of Materials Science and Engineering, Central South University, No. 932, Lushan South Road, Changsha 410083, PR China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    ultrafine silver powder; preparation; highly dispersive; dispersive mechanism;

    机译：超细银粉制备;高度分散;分散机制;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号