Preparation and properties of B/sub 2/O/sub 3//ZnO/SiO/sub 2/ film electret based on silicon

B/sub 2/O/sub 3/-ZnO-SiO/sub 2/ was a new kind of amorphous composite film based on B/sub 2/O/sub 3/ net structure and Zn/sup 2+/ ions doping. The ratio of B/sub 2/O/sub 3/, ZnO and SiO/sub 2/ was 25:65:10 (wt%). This new film material was made by a special procedure which mainly divided into three parts: melting, electrophoresis and heat treatment. The film materials processed electret properties, its trap mechanism of charge capture and storage was stable. This paper provided a new method to prepare the film electret, but the procedure should be improved to get better film electret.