Mica capacitor with end head in complete monolithic structure, and preparation method thereof

Abstract

The invention discloses a mica capacitor with an end head in a complete monolithic structure, and a preparation method thereof. The mica capacitor comprises a capacitor core group formed by sintering mica silver sheets assembled in a staggered and laminated manner, and the end head is in the complete monolithic structure; according to the mica silver sheet, a large silver electrode layer and a small silver electrode layer are arranged on the two faces of each mica sheet, the height of the end of each large silver electrode layer and the height of each small silver electrode layer are equal to the width of the corresponding mica sheet, Sa barrier layer is reserved between each large silver electrode layer and the corresponding small silver electrode layer, and the large silver electrode layer is provided with insulating edges with the same width at the two side edges of the mica sheet; and the two ends of the capacitor core group are coated with end silver paste. The height of the silver layer at the end is increased to be consistent with the width of the mica sheet, and the end part of the adjacent mica silver sheet is completely filled or coated by the silver layer, so that the end is of a complete monolithic structure after being sintered, and the domestic blank of complete monolithic structure and three-dimensional property of the end electrode leading-out part of the existing mica capacitor is filled.

Description

technical field [0001] The invention belongs to the technical field of manufacturing resistance-capacitance components, and relates to a mica capacitor with a complete monolithic structure at the end and a preparation method thereof. Background technique [0002] Mica is a mineral containing aluminum silicate, the main component is Al 2 o 3 and SiO 2 , chemical composition is KAl 2 (ALSi 3 )O 10 (OH) 2 . Mica is an extremely important and excellent inorganic insulating material. As a dielectric material, so far no other material has been found whose comprehensive performance can exceed that of mica. The advantages of mica are high dielectric strength, large dielectric constant, low loss, high chemical stability, small thermal expansion coefficient, good heat resistance, and easy peeling into thin sheets with uniform thickness. [0003] In view of the excellent mechanical properties of mica, it is easy to assemble into a laminated capacitor. Mica capacitors are capac...

AI Technical Summary

Problems solved by technology

However, in the original actual production process of mica capacitors, the processes that produce many unqualified products with electrical parameters are mainly concentrated in: the voltage breakdown waste products in the core pack withstand voltage test, the unqualified products with out-of-tolerance capacity during the capacity test, Excessive loss of waste products in the finished product test, high elimination rate in the finished product screening process

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