High-temperature-resistant solid-state capacitor diaphragm and preparation method thereof

The invention relates to the technical field of paper for solid-state capacitors, and discloses a high-temperature-resistant solid-state capacitor diaphragm which is composed of aramid fibrid, aramid pulp and high-melting-point chopped fiber and has good high-temperature resistance. The aramid fibrid can combine the aramid pulp and the high-temperature-resistant fiber together, so that the diaphragm is endowed with good binding force and smaller pore diameter; in the preparation process, the diaphragm is subjected to hot pressing and plasma treatment, so that the ESR of the solid-state capacitor is effectively reduced. 本发明涉及固态电容器用纸技术领域，公开了一种耐高温固态电容器隔膜，所述电容器隔膜由芳纶沉析纤维、芳纶浆粕和高熔点短切纤维构成，具有良好的耐高温性；芳纶沉析纤维可以将芳纶浆粕、耐高温纤维结合在一起，赋予隔膜良好的结合力和较小的孔径；在制备过程中对隔膜进行热压和等离子体处理，有效降低固态电容器的ESR。