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MLCC copper inner electrode sizing material

An internal electrode and slurry technology, applied in the direction of fixed capacitor electrodes, circuits, capacitors, etc., can solve the problem of high cost, achieve the effect of low cost, reduce internal stress, and reduce production cost

Active Publication Date: 2011-03-30
GUANGDONG FENGHUA ADVANCED TECH HLDG
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Problems solved by technology

[0002] At present, the domestic base metal MLCC capacitors are mainly made of nickel as the inner electrode material and copper as the terminal electrode material. Therefore, when the capacitor is sintered, it is necessary to first burn the inner electrode at a high temperature above 1200°C, and then use a temperature above 700°C for firing. end, the cost of such segmented sintering is high

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  • MLCC copper inner electrode sizing material
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Embodiment

[0012] According to the slurry formulations of Nos. 1 to 27 in Table 1, according to the common methods of slurry, such as weighing each formula in proportion to batching→stirring→dispersing→rolling→semi-finished product inspection→slurry mixing→finished product inspection→packaging, the MLCC is prepared In the copper internal electrode paste, the particle size of the copper powder is below 1 μm. The organic solvent is one or more of alcohols, aromatic hydrocarbons and alkane solvents. Alcohols such as ethanol, propanol, etc.; aromatics such as dichloromethane, dichloroethane, naphthalene, anthracene, etc., alkanes such as naphtha alkane series or commonly used alkanes in the prior art, such as "Rare Similar substances mentioned in "Research Progress on Electrode Slurry for Multilayer Chip Ceramic Capacitors" published in Metal Letters, Issue 9, 2008. The polymer resin is one or more of polyurethane, rosin resin and ethyl cellulose. The slurry prepared from formulas 1 to 27 ...

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Abstract

The invention relates to a multi-layer ceramic capacitor (MLCC) copper inner electrode sizing material, which comprises the following components by weight: 50 to 60 percent of superfine copper powder, 5 to 15 percent of inorganic porcelain additive, 20 to 45 percent of organic solvent, and 2 to 4 percent of polymer resin, wherein the inorganic porcelain additive is one or more of TiO2, CaCO3, BaO, SiO2, Bi2O3, Cr2O3, ZrO2, BaTiO3, SrZrO3 and CaZrO3. The copper electrode sizing material has the characteristics of low cost, uniform material, even grain size distribution, high dispersity, good forming process and environmental protection. The obtained MLCC products can achieve a co-firing process so that the overall production cost of capacitors is reduced.

Description

technical field [0001] The invention relates to an internal electrode slurry for a multilayer ceramic capacitor MLCC, in particular to an MLCC copper internal electrode slurry. Background technique [0002] At present, the base metal MLCC capacitors in China are mainly made of nickel as the inner electrode material and copper as the terminal electrode material. Therefore, when the capacitor is sintered, it is necessary to first burn the inner electrode at a high temperature above 1200°C, and then use a temperature above 700°C for firing. At the end, the cost of this segmented sintering is very high. [0003] Chinese patent CN101136261 discloses a copper electrode slurry and its manufacturing method. The weight percentages of the components in the slurry are as follows: nodular copper: 25-64%; sheet copper: 10-40%; glass powder: 2-40%. 8%; polymer resin: 0.5-6%; solvent: 16-26%. Chinese patent CN101364455 discloses a base metal copper electrode slurry and a preparation meth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G4/008H01G4/30
CPCH01G5/011H01G4/08
Inventor 张韶鸽孟淑媛傅依梅江志坚
Owner GUANGDONG FENGHUA ADVANCED TECH HLDG
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