模板沉积-去合金化法制备块体泡沫金  

Preparation of Monolithic Foamed Gold by a Template Deposit-Dealloying Method

作　　者：谭秀兰[1] 牛高[1] 李恺[1] 罗江山[1] 吴卫东[1] 唐永建[1] 

机构地区：[1]中国工程物理研究院激光聚变研究中心等离子体物理重点实验室,四川绵阳621900

出　　处：《稀有金属材料与工程》2013年第1期162-165,共4页Rare Metal Materials and Engineering

基　　金：等离子体物理国防科技重点实验室基金(9140C6805021008);国家自然科学基金(10804101);国家重点基础研究发展计划项目(2007CB815102)

摘　　要：在聚苯乙烯微球表面直接镀覆具有自支撑金层的基础上,结合去合金化工艺成功制备出双模式孔径分布的块体泡沫金样品,建立模板沉积-去合金化法制备超低密度泡沫金的工艺方法,并对其制备工艺进行研究。研究表明:化学镀金后PS微球表面的金沉积层厚度为70～90nm;在Au/PS表面进行化学镀银后镀覆层厚度增至200～400nm;模板去除后,获得了完全自支撑的Au40Ag60金银合金空心微球结构泡沫;去合金化干燥后,样品由约10μm的空心球壳和平均系带尺寸47nm的双连续结构纳米多孔球壳层的双模式孔隙形貌组成,并且由于去合金化形成的纳米多孔球壳层,样品的密度进一步减小至0.8g/cm3。The monolithic foamed gold was synthesized by a template deposit-dealloying method with polystyrene （PS） template and gold silver electroless depositing and dealloying. The results indicate that the deposited gold has the thickness of 70-90 nm, and the deposited Au/Ag has the thickness of 200-400 nm after silver electroless depositing on the surface of Au/PS. The self-supported hollow spheres Au40Ag60 alloy was obtained after the template removed. The ultra-low-density gold monoliths with multimodal pore structure, hollow spheres of about 10 ~tm, and density of 0.8 g/cm3 was obtained after dealloying heat treatment.

关 键 词：泡沫金 双模式孔径 制备 模板沉积-去合金化法 

分 类 号：O614.123[理学—无机化学]