重晶石基锑掺杂SnO_2导电粉末用于导电涂料及其屏蔽特性  

Application of Sb-SnO_2/barite(SSB) conductive powder in conductive paint and shield property of coated layer

作　　者：杨华明[1] 胡岳华[1] 张慧慧[1] 

机构地区：[1]中南大学资源生物学院无机材料系,湖南长沙410083

出　　处：《功能材料》2006年第9期1433-1435,共3页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(50474046);教育部新世纪优秀人才支持计划资助项目(NCET-05-0695)

摘　　要：以重晶石粉为基体，采用化学共沉淀技术表面包覆锑掺杂二氧化锡制得重晶石基复合导电粉末（SSB）。研究了SSB用量对涂层电阻率的影响，当粉末添加量在20％～45％时，所制备的丙烯酸导电涂料的电阻率仅为10Ω·cm。SSB用于导电涂料对于频率〈100MHz的电磁波可以达到中等屏蔽值（40dB），可应用于手机、笔记本电脑、电子医疗设备、电子计量和军事设施等领域的抗电磁波干扰。进一步探讨了导电粉末在导电涂料中的导电网络及赋存状态，认为导电粉末在涂料中的良好分散性并形成网络结构是确保涂料导电性的关键。Barite-matrix composite conductive powders coated with antimony-doped tin oxide （Sb-SnO2/BaSO4, SSB） have been successfully prepared by chemical co-precipitation technology. Effect of SSB percentage on resistivity of coated layer was investigated. The resistivity of acrylic acid paint was only 10Ω·cm when percentage of SSB reaches 20%～45%, which indicates interesting application potential in several fields. Conductive paint with SSB as filler shows excellent shield value （40dB） to electromagnetic waves of less than 100MHz, it can be widely applied in the fields of mobile, notebook PC, medical facility, electronic measuring and military establishments for antijamming of electromagnetic waves. Conductive network and condition of conductive powder in conductive paint were primarily discussed, it is indicated that well dispersion and network formation of conductive powder in paint is the key to keep better conductive property of paint.

关 键 词：重晶石粉 复合导电粉末 导电涂料 屏蔽特性 

分 类 号：TB34[一般工业技术—材料科学与工程]