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Antioxidant nickel paste and preparation method and application thereof

An anti-oxidation and nickel paste technology, which is applied to the parts of fixed capacitors, fixed capacitor electrodes, fixed capacitor dielectrics, etc., can solve the problem of limited effect on reducing the residual carbon rate, so as to reduce the residual carbon rate, promote decomposition, broaden the The effect of the upper limit of the debinding temperature

Active Publication Date: 2021-08-17
广东省先进陶瓷材料科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to reduce the residual carbon rate of MLCC, the main method currently used is to appropriately extend the holding time at the highest temperature. However, due to the cross-linking and carbonization of the binder polymer, extending the time at low temperature has a very limited effect on reducing the residual carbon rate.

Method used

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  • Antioxidant nickel paste and preparation method and application thereof
  • Antioxidant nickel paste and preparation method and application thereof
  • Antioxidant nickel paste and preparation method and application thereof

Examples

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preparation example Construction

[0032] In some embodiments, the preparation method of anti-oxidation nickel slurry comprises the following steps:

[0033] (1) The binder is dissolved in part of the solvent to obtain a binder solution;

[0034] (2) Mix the ceramic powder, dispersant and remaining solvent, stir evenly, grind in a sand mill for 6-8 hours, add the binder solution obtained in step (1), stir evenly, grind in a sand mill for 2-4 hours, and disperse To no agglomeration, the first slurry is obtained;

[0035] (3) Add nickel powder (nickel oxide) to the first slurry obtained in step (2), stir for 2 to 4 hours with a planetary mixer, and then grind for 6 to 10 times in a three-roll mill, and disperse until there is no agglomeration to obtain Antioxidant nickel paste. It should be noted that the preparation method of the anti-oxidation nickel slurry of the present invention is not limited to this process.

[0036] When the anti-oxidation nickel slurry of the present invention is used as the internal ...

Embodiment 1～5

[0042] Embodiment 1~5 and comparative example 1~2

[0043] Embodiment 1~5 and comparative example 1~2 provide a kind of nickel paste respectively, and the composition and weight content thereof of these nickel pastes are as shown in table 1, wherein the nickel source (i.e. nickel oxide powder) that 1206 specification adopts or elemental nickel powder) average particle diameter is 600nm, and the nickel source (i.e. nickel oxide powder or elemental nickel powder) average particle diameter that 0402 and 0603 specifications adopt is 400nm, and the ceramic powder used in all embodiments and comparative examples The average particle size is 100nm, the acrylic resin is b-66 produced by Dow Chemical, the polyvinyl butyral is b30t produced by Japan Kuraray, and the ethyl cellulose is dt- produced by Guangzhou Daojun Biotechnology Co., Ltd. n-50, the dispersant is German BYK byk110, German BYK byk163, German tego700, German tego674 or American Rohm and Haas acumer3100. The preparation ...

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Abstract

The invention discloses antioxidant nickel paste as well as a preparation method and application thereof. The anti-oxidation nickel paste comprises nickel powder, ceramic powder, an adhesive, a dispersing agent and a solvent, wherein the nickel powder is nickel oxide. According to the present invention, the nickel oxide is used for replacing nickel metal in the MLCC inner electrode slurry, so that on one hand, the problem that base metal is prone to oxidation is not considered, the upper limit value of the glue discharging temperature is widened, the high-temperature glue discharging is achieved, and decomposition of organic additives is promoted, so that the residual carbon rate after glue discharging of the MLCC is reduced, the oxidation problem in the glue discharging process of an inner electrode is reduced, and internal defects are reduced, an obvious positive effect on the improvement of the subsequent sintering yield and the improvement of the reliability is realized; and on the other hand, a finally obtained MLCC product can still keep good electrical performance.

Description

technical field [0001] The invention relates to the field of electronic materials and components, in particular to an oxidation-resistant nickel paste and its preparation method and application. Background technique [0002] Chip multilayer ceramic capacitors (MLCCs) are one of the most widely used passive components in downstream electronic components. In recent years, with the continuous development of technologies such as 5G, the Internet, and vehicles, higher requirements have been placed on the reliability of electrical performance of MLCCs. Studies have shown that reducing the residual carbon rate of MLCCs after debinding can improve the yield of subsequent sintered products and The improvement of reliability has obvious positive effect. However, in the current MLCC preparation process using base metals as internal electrode pastes, since base metals are easy to oxidize, the maximum temperature for debinding needs to be strictly controlled, in most cases less than 300...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G4/008H01G4/12H01G4/30
CPCH01G4/008H01G4/12H01G4/30
Inventor 邱基华陈烁烁
Owner 广东省先进陶瓷材料科技有限公司
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