Nickel inner electrode slurry for MLCC

Abstract

The invention discloses nickel inner electrode slurry for an MLCC. The slurry comprises the following components in percentage by mass: 40-65% of flaky nickel powder, 3-10% of ceramic powder, 0.5-2% of a dispersing agent, 2-4% of macromolecule resin, 30-45% of an organic solvent, and 0.5-2% of flow aid oxidized polyethlene wax, wherein the length of the flaky nickel powder is 200-300 nm, and the thickness of the flaky nickel powder is smaller than 150 nm. The nickel inner electrode slurry for the MLCC is low in ceramic powder content, good in wettability and good in fluidity, printed flaky nickel powder is oriented and stacked in the plane direction, and an electrode layer prepared from the slurry is good in flatness, low in thickness and good in 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...

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

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