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A nickel internal electrode paste for mlcc

An internal electrode and slurry technology, which is applied to fixed capacitor electrodes, conductive materials dispersed in non-conductive inorganic materials, and laminated capacitors, etc. Good wettability and good electrode continuity

Active Publication Date: 2022-05-17
JIANGSU HOYI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the flake particles are only used to replace the existing spherical particles, the flake particles have no fixed orientation in the slurry. Therefore, it is impossible to ensure that the flake particles follow the surface of the ceramic body after printing on the ceramic body and after sintering. Horizontally stacked
At the same time, when the particle size is similar, the contact area between the spherical particles is the smallest, and its fluidity is the best. However, the flake particles move in parallel during the printing process, and there are a large number of particles on the surface of the flake particles. Planar contact points, making tabular particles less fluid than spherical particles

Method used

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  • A nickel internal electrode paste for mlcc
  • A nickel internal electrode paste for mlcc
  • A nickel internal electrode paste for mlcc

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The invention relates to a nickel internal electrode slurry for MLCC. The slurry includes 55% flake nickel powder, 10% ceramic powder barium titanate powder, and the average particle diameter of the barium titanate powder is 100nm according to the mass percentage. Dispersant 2-(11-methyldodecyloxy)ethanol phosphate 0.5%, polymer resin ethyl cellulose 2%, glidant oxidized polyethylene wax 0.5%, organic solvent dihydroacetate terpinene 32 %, the length of the flaky nickel powder is 200-300nm, and the thickness of the flaky nickel powder is less than 150nm.

Embodiment 2

[0024] The difference from Example 1 is that the mass fraction of organic acid active agent 2-ethylhexanoic acid is 1%, and the organic solvent terpineol dihydroacetate is 31%.

Embodiment 3

[0026] The difference from Example 2 is that the thixotropic agent BKY-410 of BAK company is added in a mass fraction of 0.5%, and the solvent mass fraction is 30.5%.

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Abstract

The invention discloses a nickel internal electrode slurry for MLCC. The slurry comprises 40-65% of flake nickel powder, 3-10% of ceramic powder, 0.5-2% of dispersant, and 2-2% of polymer resin according to mass percentage. 4%, organic solvent 30-45%, flow aid oxidized polyethylene wax 0.5-2%, the length of the flaky nickel powder is 200-300nm, and the thickness of the flaky nickel powder is less than 150nm. The nickel internal electrode paste for MLCC has low ceramic powder content, good wettability, and good fluidity. The plate-shaped nickel powder after printing is oriented and stacked along the plane direction, and the electrode layer prepared by the paste has good flatness, Low thickness, good electrode continuity.

Description

technical field [0001] The invention relates to the technical field of slurry for internal electrodes, in particular to a nickel internal electrode slurry for MLCC. Background technique [0002] Chip multilayer ceramic capacitors (Multi-layer Ceramic Capacitors, MLCC) are multilayer ceramic capacitors composed of alternating layers of ceramic dielectric and metal internal electrodes. The manufacturing process of MLCC mainly includes the preparation of porcelain slurry, the production of dielectric diaphragm, the alternate overprinting of internal electrodes and ceramic dielectric layers, lamination, cutting, debinding, sintering, chamfering, sealing, firing, electroplating, performance testing and other processes. In the prior art, the internal electrode paste usually uses spherical conductive particles, such as figure 1 As mentioned above, the thickness of the spherical particle electrode layer is high, and the gap between the spherical particles is large, which cannot mee...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G4/008H01G4/30H01G4/12H01B1/16H01B1/22
CPCH01G4/008H01G4/30H01G4/12H01B1/16H01B1/22
Inventor 杨爱民司留启白宝柱
Owner JIANGSU HOYI TECH
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