A kind of nickel electrode paste and its preparation method and application

Abstract

The invention discloses a nickel electrode slurry, which comprises the following components in parts by weight: 40.05-70 parts of coated nickel powder, 0.01-5 parts of barium titanate particles, 0-8 parts of binder, and 0.5 parts of dispersant -3 parts, 10-40 parts of solvent and 0-15 parts of diluent; the coated nickel powder includes nickel powder and a barium titanate coating layer coated on the surface of the nickel powder. The present invention simultaneously selects coated nickel powder with a barium titanate coating layer and barium titanate particles doped between the coated nickel powders in the formula, and the barium titanate with the two structural relationships works together Inhibit the sintering shrinkage of nickel powder, and the effect is greatly improved; the process uses a combination of pulping and cavitation blasting to disperse the slurry, which not only enhances the dispersion effect, but also reduces the time of mechanical grinding, prevents excessive grinding, and makes nickel The surface characteristics of the powder are maintained, 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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