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Pulse power ceramic capacitor, end electrode and fabrication method of end electrode

A technology of ceramic capacitors and pulse power, which is applied in the direction of fixed capacitor electrodes, fixed capacitor dielectrics, and fixed capacitor terminals, etc., which can solve the problems of reducing the reliability of capacitors, weak connection between terminal electrodes and ceramic dielectrics, and poor solderability of terminal electrodes. , to achieve the effect of improving weldability, excellent adhesion and weldability, and high weldability

Inactive Publication Date: 2019-02-15
CHENGDU HONGMING & UESTC NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the terminal electrodes of the existing ceramic capacitors have poor solderability, and the connection between the terminal electrodes and the ceramic medium is not firm, which reduces the reliability of the capacitor.

Method used

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  • Pulse power ceramic capacitor, end electrode and fabrication method of end electrode
  • Pulse power ceramic capacitor, end electrode and fabrication method of end electrode
  • Pulse power ceramic capacitor, end electrode and fabrication method of end electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Preparation of electrode paste A: 3 parts of ZnO-BaO-SiO 2 , 73 parts of silver-palladium mass ratios are silver-palladium alloy powders of 75:25, 4 parts of ethyl cellulose, 20 parts of terpineol are mixed uniformly, grinder grinds, and electrode slurry A is obtained;

[0023] Preparation of electrode paste B: 0.5 parts of ZnO-BaO-SiO 2 , 1.5 Bi 2 o 3 , 73 parts of silver-palladium alloy powder with a silver-palladium mass ratio of 75:25, 5 parts of ethyl cellulose and 20 parts of terpineol were mixed uniformly, and ground by a grinder to prepare electrode slurry B.

[0024] Coating electrode slurry A on the ceramic medium for sealing, drying in a dryer, sintering in a sintering furnace to obtain a layer A electrode, and then coating electrode slurry B on the layer A electrode for sealing end, and then sintered in a sintering furnace to solidify the electrode slurry B to obtain a terminal electrode with A and B layer electrodes. In this embodiment, the thickness of...

Embodiment 2

[0026] Preparation of electrode slurry A: 7 parts of ZnO-BaO-SiO2, 68 parts of silver-palladium alloy powder with a silver-palladium mass ratio of 75:25, 5 parts of ethyl cellulose, and 20 parts of terpineol are mixed evenly and ground by a grinder , to prepare electrode slurry A;

[0027] Preparation of electrode slurry B: Mix 1 part of ZnO-BaO-SiO2, 3 parts of Bi2O3, 73 parts of silver-palladium alloy powder with a silver-palladium mass ratio of 75:25, 5 parts of ethyl cellulose and 18 parts of terpineol evenly 1. Grinding with a grinding machine to obtain electrode slurry B.

[0028] Coating electrode slurry A on the ceramic medium for sealing, drying in a dryer, sintering in a sintering furnace to obtain a layer A electrode, and then coating electrode slurry B on the layer A electrode for sealing terminal, and then sintered in a sintering furnace to solidify the electrode paste B to obtain a terminal electrode. The thickness of the A-layer electrode is 40um, the thicknes...

Embodiment 3

[0030] Preparation of electrode slurry A: 5 parts of ZnO-BaO-SiO2, 70 parts of silver-palladium alloy powder with a silver-palladium mass ratio of 75:25, 5 parts of ethyl cellulose, and 20 parts of terpineol are mixed evenly and ground by a grinder , to prepare electrode slurry A;

[0031] Preparation of electrode slurry B: 0.8 parts of ZnO-BaO-SiO2, 2 parts of Bi2O3, 73 parts of silver-palladium alloy powder with a silver-palladium mass ratio of 75:25, 4.2 parts of ethyl cellulose and 20 parts of terpineol were mixed evenly 1. Grinding with a grinding machine to obtain electrode slurry B.

[0032] Coating electrode slurry A on the ceramic medium for sealing, drying in a dryer, sintering in a sintering furnace to obtain a layer A electrode, and then coating electrode slurry B on the layer A electrode for sealing terminal, and then sintered in a sintering furnace to solidify the electrode paste B to obtain a terminal electrode. In this embodiment, the thickness of the A-layer...

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Abstract

The invention discloses a pulse power ceramic capacitor. The pulse power ceramic capacitor comprises a ceramic medium, a metal electrode and an end electrode, wherein the metal electrode is arranged in the ceramic medium, the end electrode is arranged outside the ceramic medium, the end electrode communicates with the metal electrode and comprises an A-layer electrode and a B-layer electrode, theA-layer electrode is arranged on an outer wall of the ceramic medium, the B-layer electrode covers the A-layer electrode, the mass ratio of the A-layer electrode and the B-layer electrode is (0.7-1.3):1, the thickness of the A-layer electrode is 30-55 micrometers, and the thickness of the B-layer electrode is 30-55 micrometers. The end electrode of the capacitor has high bonding force with the ceramic medium, and the end electrode is high in weldability and high in welding resistance.

Description

technical field [0001] The invention belongs to the technical field of capacitor preparation, and in particular relates to a pulse power ceramic capacitor. Background technique [0002] Pulse power ceramic capacitors are mainly composed of three parts: a ceramic dielectric layer, a built-in metal electrode, and a terminal electrode outside the ceramic dielectric layer. When manufacturing a ceramic capacitor, the terminal electrode paste is usually sintered to form the terminal electrode. However, the terminal electrodes of the existing ceramic capacitors have poor solderability and weak connection between the terminal electrodes and the ceramic medium, which reduces the reliability of the capacitor. Contents of the invention [0003] The purpose of the present invention is to solve the above-mentioned deficiencies in the prior art and provide a pulse power ceramic capacitor, which can enhance the connection between the terminal electrode and the ceramic medium and improve...

Claims

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Application Information

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IPC IPC(8): H01G4/005H01G4/12H01G4/228H01G4/232
CPCH01G4/005H01G4/12H01G4/228H01G4/232
Inventor 蒋悦清张玲乔峰杜赫迪
Owner CHENGDU HONGMING & UESTC NEW MATERIALS
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