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Preparation method of ultrahigh power multilayer composite membrane capacitor

A multi-layer composite film and capacitor technology, applied in capacitor manufacturing, multilayer capacitors, capacitors, etc., can solve the problems of low qualification rate and high cost, and achieve the effect of reducing process cost, improving energy storage density and low cost

Inactive Publication Date: 2009-09-16
柯昌凤
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to propose a method for preparing an ultra-high power multilayer composite film capacitor, which solves the technical problems of high cost and low pass rate when the existing chip multilayer ceramic capacitor is prepared by sintering process

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  • Preparation method of ultrahigh power multilayer composite membrane capacitor

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Embodiment Construction

[0020] The preparation process of the present invention:

[0021] First, mixing ceramic powder and polyvinylidene fluoride nano-powder, because the polyvinylidene fluoride content is very low, and adding a certain amount of dimethylformamide as the polyvinylidene fluoride solvent to make the mixing more uniform. The ball milling process is used to make the powder uniformly mixed, and the polyvinylidene fluoride powder is evenly coated on the surface of the barium titanate powder, which is beneficial to the formation of a uniform and dense composite film. After the composite powder is uniformly mixed, add terpineol and other organic solvents to configure the dielectric slurry. The slurry is required to have good stability and a certain fluidity, and the various components in the mixed solvent can be maintained at 160°C. It is completely volatilized and will not adversely affect the dielectric layer.

[0022] Then, a multilayer film is prepared. Due to the use of ceramic / organic com...

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Abstract

The invention relates to a preparation method of a multilayer composite membrane capacitor, comprising the following steps of: firstly preparing ceramic powder doped with barium titanate, then preparing alkali metal low-temperature electrocondutive slurry, preparing a multilayer membrane, carrying out pretreatment and isostatic pressing, finally connecting a plurality of multilayer membrane blocks and forming an ultrahigh power multilayer composite membrane capacitor. The multilayer composite membrane capacitor adopts isostatic pressing technique, solves the technical problems of high cost and low qualification rate of the existing sheet-type multilayer ceramic capacitor when adopting sintering technique for preparation, has the advantages of high voltage, high power, low cost and the like, greatly improves the energy storage density of the ceramic capacitor and reduces the technique cost of the capacitor. The capacitor can be used in various fields which have high requirements for discharging power and voltage of the capacitor.

Description

Technical field [0001] The invention relates to a method for preparing a capacitor, in particular to a method for preparing a multilayer composite film capacitor. Background technique [0002] With the demand for miniaturization, low cost, and high performance of electronic components, base metal internal electrode chip multilayer ceramic capacitors are also developing in the direction of large capacity and ultra-thin layers. The base metal internal electrode chip multilayer ceramic capacitor is composed of three layers of ceramic dielectric, internal electrode metal layer and terminal electrode. However, ceramic capacitors with this structure need to be prepared by a sintering process. The general sintering temperature range is between 1200-1300°C, and the low-temperature sintering temperature range is between 800-1000°C. For this reason, it is inevitable to solve the problem of how ceramic dielectrics and internal electrode metals with different shrinkage rates will not delamin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G4/30H01G4/12H01G13/00
Inventor 柯昌凤
Owner 柯昌凤
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