Inner electrode paste

An internal electrode and slurry technology, applied in the direction of fixed capacitor electrodes, fixed capacitor components, etc., can solve problems such as cracking and product delamination

Active Publication Date: 2015-04-29
GUANGDONG FENGHUA ADVANCED TECH HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when applied to MLCCs using NPO (negative positive zero) ceramics, the traditional nickel internal electrode paste can only meet the requirements of low-frequency,

Method used

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preparation example Construction

[0040] A method for preparing internal electrode paste according to one embodiment is used to prepare the above-mentioned internal electrode paste. The preparation method of the internal electrode slurry is as follows in step S110 and step S120.

[0041] Step S110: mixing the organic solvent and the polymer resin, heating to 80° C., and maintaining at 80° C. for 2 hours to obtain an organic vehicle.

[0042] Step S120: Mix nickel powder, ceramic powder, organic additives and organic vehicle to obtain internal electrode slurry.

[0043] The inner electrode slurry includes the following components by mass percentage: 45-55% of nickel powder, 5-15% of ceramic powder, 28-35% of organic solvent, 3-6% of polymer resin and 0.1-3% of organic additive.

[0044] The preparation method of the above-mentioned internal electrode slurry firstly prepares an organic vehicle and then mixes nickel powder, ceramic powder, organic additives and the organic vehicle, so that the nickel powder, cer...

Embodiment 1

[0064] Preparation of internal electrode paste

[0065] 1. Preparation of ceramic powder

[0066] A, in the calcium chloride solution that concentration is 40g / L, add calcium oxide, stir while heating to boil for 25 minutes and then leave standstill for 3 hours, after the solution temperature drops to room temperature, filter the solution into the reactor; B, put Add the sodium hydroxide solution with a molar ratio of 1.3:1 into the solution obtained in step A, and circulate and stir after adding; C, feed carbon dioxide into the solution in step B under stirring to carry out carbonization reaction, and control The reaction temperature is 20° C., until the pH=6 to stop the reaction, and finally filter, wash and dry to obtain calcium carbonate powder, namely calcium carbonate ceramic powder.

[0067] 2. Preparation of organic additives

[0068] Siloxane KD-9 was dissolved in dibutanol to prepare an organic additive with a concentration of 0.15 g / L.

[0069] 3. Preparation of in...

Embodiment 2

[0082] Preparation of internal electrode paste

[0083] 1. Preparation of ceramic powder

[0084] A. Dissolve zirconium oxychloride in deionized water, control the mass ratio of zirconium oxychloride to deionized water to 4:21, and add methyl amyl alcohol to the zirconium oxychloride aqueous solution, the quality of methyl amyl alcohol is the solution quality 1‰~5‰; B. Add ammonia water dropwise to the mixed solution in step A, control the molar ratio of ammonia water to zirconium oxychloride to be 1.8:1, and control the reaction temperature to 40°C at the same time, keep the temperature after adding ammonia water dropwise Crystallize at 40°C for 0.5hr, and after the reaction is completed, a zirconium hydroxide hydrogel is generated; C, the zirconium hydroxide hydrogel in step B is washed, press-filtered or centrifuged to obtain a zirconium hydroxide gel; D, the step B The zirconium hydroxide gel of C is dried to obtain zirconium hydroxide, and then the zirconium hydroxide is...

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Abstract

The invention relates to inner electrode paste, which is prepared from the following components by mass percent: 45%-55% of nickel powder, 5%-15% of ceramic powder, 28%-35% of an organic solvent, 3%-6% of macromolecule resin and 0.1%-3% of an organic additive. The inner electrode paste is obtained by appropriate proportioning of the nickel powder, the ceramic powder, the organic solvent, the macromolecule resin and the organic additive; the inner electrode paste has the advantage of good electrode continuity after being sintered by the nickel powder, the silk-screen printing property is not affected, and the phenomenon of net sticking or net jamming is unlikely to appear; the ceramic powder is capable of restraining shrinkage of an inner electrode layer, and effectively restraining cracking and layering of chips; the nickel powder and the ceramic powder can be evenly and stably dispersed in a paste system by the organic additive; the condition that a required pattern is completely and evenly printed by the inner electrode paste can be ensured by the macromolecule resin and the organic solvent; the inner electrode paste can meet the usage requirements of high-frequency and high-capacity multi-layer ceramic capacitors.

Description

technical field [0001] The invention relates to the technical field of conductive paste, in particular to an internal electrode paste. Background technique [0002] Judging from the market development in recent years, multilayer ceramic capacitors (MLCC) are increasingly entering the field of high capacitance. At present, 100μF multilayer ceramic capacitors are dominant, and more 100μF products will appear in the future. Miniaturization and high capacity are the future development direction of MLCC. However, when applied to MLCCs using NPO (negative positive zero) ceramics, the traditional nickel internal electrode paste can only meet the requirements of low-frequency, low-layer MLCC products. When using high-layer MLCC products, it is easy to cause Poor compatibility with the medium leads to problems of product delamination and cracking. Contents of the invention [0003] Based on this, it is necessary to provide an internal electrode paste that can meet the requirement...

Claims

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Application Information

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IPC IPC(8): H01G4/008
Inventor 欧阳铭廖明雅唐浩宋永生张彩云叶向红
Owner GUANGDONG FENGHUA ADVANCED TECH HLDG
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