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A high-dispersibility, low-shrinkage nickel internal electrode paste and preparation method thereof

An internal electrode, slurry technology, applied in conductive materials dispersed in non-conductive inorganic materials, cable/conductor manufacturing, fixed capacitor electrodes, etc., can solve problems such as reducing shrinkage and uneven dispersion of nano-BaTiO

Active Publication Date: 2022-03-29
西安宏星电子浆料科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention has prepared a kind of TiO 2 / BaCO 3 / MgO coated nickel powder, applying it to the nickel inner electrode slurry can overcome the nano-BaTiO in the traditional nickel inner electrode production process 3 The problem of uneven dispersion can reduce the shrinkage rate of the nickel inner electrode slurry during sintering, improve the matching of the shrinkage rate between the nickel inner electrode slurry and the MLCC cast film tape, reduce the holes and discontinuities of the MLCC inner electrode, and meet the requirements of MLCC. A series of requirements for small size, high capacity, and high withstand voltage

Method used

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  • A high-dispersibility, low-shrinkage nickel internal electrode paste and preparation method thereof
  • A high-dispersibility, low-shrinkage nickel internal electrode paste and preparation method thereof
  • A high-dispersibility, low-shrinkage nickel internal electrode paste and preparation method thereof

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preparation example Construction

[0084] The nickel internal electrode slurry with high dispersion and low shrinkage can be prepared by adopting the method for preparing the nickel internal electrode slurry provided by the invention. Therefore, the present invention includes the nickel internal electrode paste prepared by the method for preparing the nickel internal electrode paste of the present invention.

[0085] Inner electrode and MLCC

[0086] The nickel internal electrode slurry of the present invention can be made into an internal electrode after sintering, for example, the internal electrode for MLCC can be formed by co-firing the nickel internal electrode slurry of the present invention and MLCC casting film. Therefore, the present invention includes an internal electrode made using the nickel internal electrode paste of the present invention and an MLCC including the internal electrode. The internal electrode of the present invention has reduced holes and good continuity, and can meet a series of r...

Embodiment 1

[0100] This embodiment prepares a kind of highly dispersible, low-shrinkage nickel internal electrode slurry, which specifically includes the following steps:

[0101] (1) TiO 2 / BaCO 3 / MgO coated nickel powder preparation: the average particle size of 600nm nickel powder 1, TiO 2 Sol, BaCO 3 The sol and MgO sol were stirred and slurried according to the mass ratio of 100:31:171:2, and sanded 4 times at a speed of 1000rpm in a sand mill; TiO was obtained by a spray dryer at an inlet temperature of 200°C 2 / BaCO 3 / MgO coated nickel powder.

[0102] (2) Preparation of high-viscosity nickel inner electrode slurry A: TiO 2 / BaCO 3 / MgO-coated nickel powder, high-viscosity binder 1 and dispersant are mixed evenly according to the mass ratio of 100:27:1, and then the solid content is 78.1% under the rolling machine 4Bar pressure rolling 4 times and 16Bar pressure rolling 2 times High viscosity nickel inner electrode paste A.

[0103] (3) Preparation of high-dispersibility...

Embodiment 2

[0105] This embodiment prepares a kind of highly dispersible, low-shrinkage nickel internal electrode slurry, which specifically includes the following steps:

[0106] (1) TiO 2 / BaCO 3 Preparation of / MgO-coated nickel powder: nickel powder 2, TiO with an average particle size of 400nm 2 Sol, BaCO 3 The sol and MgO sol were stirred and slurried according to the mass ratio of 100:34:183:3, and sanded 6 times at the speed of 1250rpm of the sand mill; the TiO was obtained by the spray dryer at the inlet temperature of 225°C 2 / BaCO 3 / MgO coated nickel powder.

[0107] (2) Preparation of high-viscosity nickel inner electrode slurry A: TiO 2 / BaCO 3 / MgO-coated nickel powder, high-viscosity binder 1 and dispersant are mixed evenly according to the mass ratio of 100:27:2, and then the solid content is 77.5% under the pressure rolling of 6Bar pressure rolling 6 times and 18Bar pressure rolling 4 times. High viscosity nickel inner electrode paste A.

[0108] (3) Preparation ...

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Abstract

The invention provides a nickel internal electrode slurry, the nickel internal electrode slurry contains TiO 2 / BaCO 3 / MgO coated nickel powder, resin, organic solvent and dispersant, the TiO 2 / BaCO 3 / MgO coated nickel powder is coated with TiO on the surface 2 、BaCO 3 and MgO nano-nickel powder. The nickel internal electrode slurry of the present invention can effectively reduce the shrinkage rate of the nickel internal electrode slurry, improve the matching of the nickel internal electrode slurry and the shrinkage rate of the MLCC cast film tape, reduce the holes and discontinuities of the MLCC internal electrode, and meet the requirements of the MLCC. A series of requirements for small size, high capacity, and high withstand voltage.

Description

technical field [0001] The invention belongs to the field of internal electrodes for multilayer chip ceramic capacitors, and in particular relates to a high-dispersibility, low-shrinkage nickel internal electrode slurry and a preparation method thereof. Background technique [0002] Nickel internal electrode paste is mainly used in chip multilayer ceramic capacitors (Multi-Layer Ceramic Capacitors, MLCC). With the rapid development of modern smart devices, the highly integrated design of circuit boards puts forward a series of requirements for MLCC with small size, high capacity and high withstand voltage. [0003] The preparation method of the traditional nickel internal electrode slurry is to mix nickel powder, nanometer BaTiO 3 The powder, binder, dispersant and organic solvent are mixed and stirred evenly, and rolled and dispersed by a three-roll mill. However, the traditional rolling process is not suitable for nano-BaTiO 3 Powder dispersion ability is limited, nano ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B1/16H01B1/22H01B13/00H01G4/008H01G4/12
CPCH01B1/16H01B1/22H01B13/00H01G4/008H01G4/0085H01G4/12
Inventor 谭彪曾艳艳吴高鹏赵科良郭霖
Owner 西安宏星电子浆料科技股份有限公司