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

A technology of capacitors and mica, which is applied in the direction of laminated capacitors, fixed capacitor electrodes, fixed capacitor leads, etc., can solve the problems of excessive capacity, large loss, high elimination rate, etc., achieve small tanδ value, improve hit rate, and easy to operate Effect

Pending Publication Date: 2021-06-11
陕西华茂电子科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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

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preparation example Construction

[0055] A method for preparing a mica capacitor with a complete monolithic structure at the end, comprising the following operations:

[0056] 1) Cut the mica sheet according to the required size and clean it, then print the large silver electrode layer and the small silver electrode layer symmetrically on both sides of the mica sheet through screen printing, and the height of the two ends is the same as that of the mica sheet equal in width;

[0057] After the silver electrode layer is printed, transfer the mica silver sheet to the heating plate, and dry it at a temperature of 170-230°C for 3-5 minutes;

[0058] 2) Spread the dried mica silver flakes flat on the transmission mesh belt of the tunnel sintering furnace, and transfer them from the furnace head at 400°C to the furnace tail at 600°C while sintering the mica silver flakes. The conveying / sintering time is 25~ 35min;

[0059] 3) When adjacent mica silver sheets are staggered and stacked, assemble the core group accor...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G4/005H01G4/232H01G4/30
CPCH01G4/012H01G4/232H01G4/30
Inventor 刘建学王增鹏扈敬张文胜田淑玲段娜
Owner 陕西华茂电子科技有限责任公司
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