Modification of alumina powders by nickel and platinum coating
Modification of alumina powders by nickel and platinum coating
复制标题
镍和铂涂层对氧化铝粉末的改性
DOI：
10.1016/0921-5093(91)90615-t
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
C. Raub
中科院分区：
文献类型：
--
作者：
H. Schils;M. Heuberger;H. Frey;H. Jehn;R. Telle;C. Raub
采用溅射法在粗晶Al2O3粉末表面均匀地镀上一层镍或铂薄膜，然后用60 keV Ar+离子轰击进行离子束混合。与未处理的样品相比，涂层粉末的烧结行为进行了测定。在相同温度下处理时，镍包覆粉末的烧结速率几乎不变，而铂包覆降低了烧结速率。另外测量了烧结样品的磁性和导电性以及涂层粉末相对于NO和CO转化的催化性能。它们显示出一定的导电性，即可以制备“本体金属化”陶瓷材料。此外，描述了用于溅射涂覆和离子束处理的系统。
Coarse-grained Al2O3powder was homogeneously sputter coated with a thin nickel or platinum film and in part subsequently ion beam mixed by 60 keV Ar+ion bombardment. The sintering behaviour of the coated powders as compared with untreated samples was determined. The sintering rate is almost unchanged for nickel-coated powders, while platinum coating decreases the sintering rate when treated at the same temperature. The magnetic properties and electrical conductivity of sintered samples as well as the catalytic properties of the coated powders with respect to NO and CO conversion were additionally measured. They show a certain conductivity,i.e. a “bulk-metallized” ceramic material can be prepared. Furthermore, the system for sputter coating and ion beam treatment is described.