Nickel electrode slurry, preparation method and application thereof

Abstract

The invention discloses a nickel electrode slurry which comprises the following components in parts by weight: 40.05-70 parts of a coated nickel powder, 0.01-5 parts of barium titanate particles, 0-8 parts of an adhesive, 0.5-3 parts of a dispersing agent, 10-40 parts of a solvent and 0-15 parts of a diluent. The coated nickel powder comprises a nickel powder and a barium titanate coating layer coated on the surface of the nickel powder. According to the formula, the coated nickel powder with the barium titanate coating layer and the barium titanate particles doped in the coated nickel powder are selected at the same time, sintering shrinkage of the nickel powder is inhibited through the combined action of the barium titanate with the two structural relations, and the effect is greatly improved; and according to the process, the slurry is dispersed in a manner of combining squeezing and cavitation blasting so that the dispersion effect is enhanced, the mechanical grinding time is shortened, excessive grinding is prevented, the surface characteristics of the nickel powder are kept, and the oxidation resistance of the nickel powder is excellent.

Description

technical field [0001] The invention belongs to the technical field of conductive paste, and in particular relates to a nickel electrode paste and its preparation method and application. Background technique [0002] Multilayer ceramic capacitors (MLCC) are widely used in mobile communications, computers, consumer electronics, automotive electronics and other information electronics fields. The traditional MLCC electrode material is Pb / Ag alloy or pure Pb, which is expensive, and the use of base metal materials to replace traditional Pb / Ag electrode materials can meet the requirements of large capacity and low cost. Therefore, base metallization of MLCC electrodes is the current development trend. [0003] However, there are still some problems in the firing process of the base metal inner electrode multilayer ceramic capacitor, such as: the nickel powder of the inner electrode material is easily oxidized to cause poor conductivity, and the shrinkage of the inner electrode ...

AI Technical Summary

Problems solved by technology

However, the existing method is generally to combine barium titanate particles on the surface of nickel powder, and the distance between barium titanate particles is relatively large, so the effect of inhibiting the sintering shrinkage of nickel powder is still not ideal.

In addition, most of the existing methods only use mechanical grinding to strengthen the dispersion effect of materials, resulting in low pulping efficiency and high production costs, and excessive grinding can easily lead to deformation of nickel particles and even damage the oxide layer on the surface of nickel particles, reducing the nickel particle size. Antioxidant

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