Production method of nickel paste for ultrahigh-capacitance MLCC (multilayer ceramic capacitor), nickel paste and MLCC

A production method and ultra-high-capacity technology are applied to the dispersion of nickel paste for ultra-high-capacity MLCC, MLCC. In the field, it can solve the problems of pressure resistance, poor HALT performance, and high-capacity nickel paste cannot achieve the dispersion effect, and achieve the effects of good pressure resistance, improved dispersion effect, and HALT performance improvement

Active Publication Date: 2014-12-03
JIANGSU HOYI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high-capacity nickel paste produced in this way often cannot achieve the required dispersion effect, making the product poor in pressure resistance and HALT performance

Method used

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  • Production method of nickel paste for ultrahigh-capacitance MLCC (multilayer ceramic capacitor), nickel paste and MLCC
  • Production method of nickel paste for ultrahigh-capacitance MLCC (multilayer ceramic capacitor), nickel paste and MLCC
  • Production method of nickel paste for ultrahigh-capacitance MLCC (multilayer ceramic capacitor), nickel paste and MLCC

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Make nickel paste for ultra-high capacity MLCC as follows:

[0031] (1) Take 40 parts by weight of nickel powder, 0.3 parts of phosphate ester dispersant Hostaphat OPS 75E and 59.7 parts of dodecane, place them in a sand mill, and disperse at 1500 rpm for 2 hours.

[0032] (2) Get 40 parts by weight of barium titanate powder, 0.3 parts of phosphoric acid ester dispersant Hostaphat OPS 75E and 59.7 parts of dodecane; here, the total weight of barium titanate powder, dispersant and dodecane 10% of the total weight of the material in step (1). The material was placed in a sand mill and dispersed at 1500rpm for 2 hours.

[0033] (3) Mix the materials of steps (1) and (2), and add the binder to stir; wherein the preparation method of the binder is: dissolve the ethyl cellulose resin with dodecane, and make the ethyl cellulose The concentration (w / v) is 8%. The add-on of binding agent is 20% of step (1) material gross weight.

[0034] (4) Grinding and dispersing with a th...

Embodiment 2

[0037] Make nickel paste for ultra-high capacity MLCC as follows:

[0038] (1) Get 55 parts of nickel powder by weight, 0.5 part of phosphoric acid ester dispersant Hostaphat OPS 75E, 0.5 part of Span series dispersant S-40, 22 parts of octanol, 22 parts of terpineol, place In a sand mill, disperse at 2000 rpm for 2.5 hours.

[0039] (2) 51 parts of barium titanate powder, 0.5 parts of phosphate ester dispersant Hostaphat OPS75E, 0.5 parts of Span series dispersant S-40, 24 parts of octanol, and 24 parts of terpineol are taken by weight; The total weight of material at place is 20% of the total weight of material in step (1). The material was placed in a sand mill and dispersed at 2000rpm for 2.5 hours.

[0040] (3) Mix the materials of steps (1) and (2), and add the binder to stir; wherein the preparation method of the binder is: dissolve the ethyl cellulose resin with octanol to make the ethyl cellulose The concentration (w / v) was 15%. The add-on of binder is 30% of step...

Embodiment 3

[0044] Make nickel paste for ultra-high capacity MLCC as follows:

[0045] (1) Take 70 parts by weight of nickel powder, 2 parts of lecithin, and 28 parts of menthol, place them in a sand mill, and disperse at 2500 rpm for 1.5 hours.

[0046] (2) Take 70 parts by weight of barium titanate powder, 2 parts of lecithin, and 28 parts of menthol; the total weight of barium titanate powder, lecithin and menthol is 30% of the total weight of the materials in step (1). The material was placed in a sand mill and dispersed at 2500rpm for 1.5 hours.

[0047] (3) Mix the materials of steps (1) and (2), and add the binder to stir; wherein the preparation method of the binder is: dissolve the ethyl cellulose resin with menthol, and make the ethyl cellulose The concentration (w / v) was 20%. The add-on of binding agent is 40% of step (1) material gross weight.

[0048] (4) Grinding and dispersing with a three-roll mill for 4.5 hours.

[0049] (5) After dilution, carry out precision filtrat...

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Abstract

The invention discloses a production method of nickel paste for an ultrahigh-capacitance MLCC (multilayer ceramic capacitor). The production method includes the steps of 1, dispersing nickel powder, dispersant and solvent with a sander; 2, dispersing barium titanate powder, dispersant and solvent with the sander; 3, mixing a product of the first step and a product of the second step, and performing mixing before adding adhesive; 4, performing conventional dispersion and filtration. The invention further provides nickel paste produced by the production method of the nickel paste for the ultrahigh-capacitance MLCC and an MLCC produced with the nickel paste for the ultrahigh-capacitance MLCC. The production method has the advantages that nickel powder and barium titanate powder can be dispersed more effectively, and the produced MLCC is good in voltage resistance and HALT (highly accelerated life testing) performance.

Description

technical field [0001] The invention relates to a method for preparing nickel slurry for ultra-high capacity MLCC, in particular to a method for dispersing nickel slurry for ultra-high capacity MLCC. The invention also relates to the nickel slurry obtained from the method for preparing the nickel slurry for ultra-high capacity MLCC, and the MLCC prepared from the nickel slurry. Background technique [0002] At present, the nickel paste used in ultra-high capacitance multilayer chip ceramic capacitors (MLCC) products such as 0402X5R225, 0805X5R226, etc. requires the particle size of nickel powder to be 0.17-0.20 μm, and the particle size of barium titanate powder to be 0.05-0.1 μm. The particle size of the powder is so small that the dispersion requirements become very high. If the dispersion effect is not good, the presence of agglomerated large particles in the nickel slurry will lead to product pressure resistance, deterioration of Highly Accelerated Life Test (HALT) perf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00H01G4/30
Inventor 蒋丽佳
Owner JIANGSU HOYI TECH
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