Study on the relationship between component heat treatment fiber structure and specific capacitance of low voltage capacitive filter

Abstract

This article reviews the relationship between the composition, heat treatment, microstructure and specific capacitance of low-voltage capacitor aluminum foil. The conclusions are: (1) Due to the high dislocation density of hard high-purity aluminum foil, after corrosion and formation The specific capacitance is higher than that of annealed aluminum foil; (2) the specific capacitance of high-purity aluminum foil after appropriate heat treatment increases with the increase of surface cubic texture fraction; (3) certain trace elements make the dislocation density of annealed high-purity aluminum foil and The surface cubic texture fraction is increased, thus increasing its specific capacitance more effectively; (4) The grain size of annealed aluminum and aluminum alloy foils has no significant impact on the specific capacitance.