Abstract: There are different kinds of microstructure defects in metal particles-matrix complex thin films. In order to study these defects we produced complex thin film of Ag particles embedded in BaO matrix. The samples were annealed at different temperature. The mean positron annihilation lifetime of the samples decreased as the annealing temperature raised. It indicates that the structure condition of the interface between Ag particles and the matrix had been improved by annealing.

Key words: metal particles, positron annihilation, thin film

摘要： 以真空蒸发方式制备的金属微粒-介质复合薄膜，会存在各种不同的微观结构缺陷。为研究它的这种缺陷，制备了Ag微粒-介质(BaO)复合薄膜，并在不同温度下退火，对这些样品做了正电子湮没寿命实验，结果发现随退火温度升高正电子湮没平均寿命减少，这是因为表征金属微粒与介质之间界面状况的缺陷经退火而得到改善。

关键词: 金属微粒, 正电子湮没, 薄膜