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Inner electrode paste and preparation method thereof

An internal electrode and slurry technology, which is used in fixed capacitor electrodes, cable/conductor manufacturing, circuits, etc., can solve problems such as poor dielectric layer matching and inability to meet ceramic capacitors.

Active Publication Date: 2016-11-23
GUANGDONG FENGHUA ADVANCED TECH HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The matching between the traditional internal electrode paste and the dielectric layer of ceramic capacitors is poor, and it is difficult to achieve smaller losses and higher efficiency, and cannot meet the requirements of improving the Q value of ceramic capacitors

Method used

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  • Inner electrode paste and preparation method thereof
  • Inner electrode paste and preparation method thereof
  • Inner electrode paste and preparation method thereof

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preparation example Construction

[0032] The preparation method of the above-mentioned internal electrode slurry comprises the following steps:

[0033] Step S110 , mixing 3%-8% organic solvent with 3%-7% polymer resin and fully dissolving to obtain an organic vehicle.

[0034] The above percentages are percentages by mass.

[0035] In one embodiment, the polymer resin is selected from at least one of ethyl cellulose and rosin resin. After the polymer resin is cured, a firm bond can be formed between the particles of the inorganic additive in the internal electrode slurry, and between the inorganic additive and the dielectric layer.

[0036] In one embodiment, the organic solvent is selected from at least one of ethylene glycol butyl ether acetate and terpineol. At least one of ethylene glycol butyl ether acetate and terpineol is selected as an organic solvent, which can fully dissolve the polymer resin and fully disperse the silver powder in the polymer resin; the organic solvent can adjust the viscosity of...

Embodiment 1

[0052] Fully mix 42% terpineol and 28% ethylene glycol butyl ether acetate to obtain a mixed solvent, heat the mixed solvent to 70°C, add 2% rosin resin and 28% ethyl cellulose, and dissolve for 2 hours to obtain organic carrier.

[0053] A mixture of 14% organic vehicle, 2% hydrogenated castor oil (organic additive), 3% CaO and ZnO (wherein the mass ratio of CaO and ZnO is 7:3), 6% terpineol (organic solvent) and 75% Silver powder is mixed to obtain a mixture. Among them, the particle size D50 of the silver powder is 0.895μm, the particle size D90 is 1.579μm, and the specific surface area is 1.124m 2 / g.

[0054] The mixture was ground by a three-roll mill, and the number of grinding times was 6 times to obtain an internal electrode slurry. The fineness, viscosity and solid content test results of the prepared internal electrode slurry are shown in Table 1:

[0055] Table 1

[0056]

[0057] Among them, the fineness is tested by a scraper fineness meter, the viscosity...

Embodiment 2

[0064] Fully mix 42% terpineol and 28% ethylene glycol butyl ether acetate to obtain a mixed solvent, heat the mixed solvent to 70°C, add 2% rosin resin and 28% ethyl cellulose, and dissolve for 2 hours to obtain organic carrier.

[0065] 12% organic vehicle, 1% polyolefin wax (organic additive), 2% CaO, ZrO 2 And a mixture of SrO (where CaO, ZrO 2 The mass ratio of SrO and SrO is 3:3:4), 5% terpineol (organic solvent) and 80% silver powder are mixed to obtain a mixture. Among them, the particle size D50 of the silver powder is 1.947μm, the particle size D90 is 3.616μm, and the specific surface area is 0.524m 2 / g.

[0066] The mixture was ground with a three-roll mill for 7 times to obtain an internal electrode slurry. The fineness, viscosity and solid content test results of the prepared internal electrode slurry are shown in Table 3:

[0067] table 3

[0068]

[0069] Among them, the fineness is tested by a scraper fineness meter, the viscosity is tested by a BROOK...

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Abstract

The invention discloses an inner electrode paste and a preparation method of the inner electrode paste. The inner electrode paste is characterized by being prepared from, by weight, 75-85% of silver powder, 0.5-2% of organic additive, 0.1-3% of inorganic additive, 3-7% of macromolecule resin, and 10-19% of organic solvent, wherein the organic additive is selected from at least one of hydrogenated castor oil and polyolefine wax, and the inorganic additive is selected from at least one of ZnO, CaO, ZrO2, SrO and BaO. The inner electrode paste is well matched with a dielectric layer of a ceramic capacitor.

Description

technical field [0001] The invention relates to the technical field of conductive paste, in particular to an internal electrode paste and a preparation method thereof. Background technique [0002] Ceramic capacitors are one of the foundations of the current rapidly developing electronic technology, mass-produced and widely used in household appliances, medical equipment, transportation equipment and other fields. In order to adapt to the development of some electronic complete machines and electronic equipment in the direction of high power and high withstand voltage, high withstand voltage, high current, high power, and high Q value chip capacitors are an important development direction at present. [0003] The matching between traditional internal electrode paste and the dielectric layer of ceramic capacitors is poor, and it is difficult to achieve smaller losses and higher efficiency, and cannot meet the requirements of improving the Q value of ceramic capacitors. Cont...

Claims

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Application Information

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IPC IPC(8): H01B1/22H01G4/008H01B13/00
CPCH01B1/22H01B13/00H01G4/0085
Inventor 廖明雅欧阳铭宋永生吴海斌叶向红张彩云
Owner GUANGDONG FENGHUA ADVANCED TECH HLDG
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