Production method of barium titanate based multilayer ceramic capacitor nanopowder for nickel electrode

Abstract

The invention discloses a nickel internal electrode barium titanate-based multilayer ceramic capacitor nanoporcelain powder and a preparation method thereof, and relates to a barium titanate-based multilayer ceramic capacitor nanoscale dielectric material. The present invention adopts the co-precipitation method in the wet chemical method, through a reasonable formula, optimizes the synthesis process, and at a lower temperature, prepares the barium titanate-based barium titanate that is used in MLCC, is suitable for nickel internal electrodes, and has reduction resistance. Calcined powder of perovskite phase with 20~50nm powder, this powder can be sintered in reducing atmosphere at 1150℃~1250℃ for 1~2 hours, then it can be fired into barium titanate-based high dielectric properties, suitable for nickel Y5V multilayer ceramic capacitors with internal electrodes. The room temperature dielectric constant of the made dielectric ceramic is as high as 9400, the dielectric loss is 1-3%, and the resistivity is ≥10 12 ~10 13 Ω·cm. The invention has simple equipment and low cost, and the prepared ceramics can meet the requirements of the development trend of MLCC high performance, miniaturization and base metalization.

Description

technical field [0001] The invention belongs to the preparation of electronic ceramic materials, in particular to a preparation method of nano-ceramic powder for anti-reduction barium titanate-based multilayer ceramic capacitors conforming to the Y5V standard, which is suitable for non-precious metal nickel as an inner electrode. Background technique [0002] Barium titanate is one of the most widely used materials in electronic ceramics. It is an important material for the production of multilayer ceramic capacitors (MLCC). In recent years, the development of MLCC technology has mainly focused on the high capacity of products, base metallization, small and multifunctional aspects. Since the internal electrode metal material used in MLCC has to be sintered with the dielectric material at the same time to form a monolithic structure, while the sintering temperature of the conventional barium titanate-based MLCC material is as high as 1300 ° C, it needs to be high melting poin...

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Problems solved by technology

[0005] The present invention aims at problems such as too large barium titanate-based powder particles, too high sintering temperature, and too high electrode cost, etc., adopts the co-precipitation method in the wet chemical method, optimizes the synthesis process through a reasonable formula, and prepares at a relatively low temperature. Nanoscale perovskite phase ultrafine BaTiO with anti-reduction properties suitable for MLCC with nickel inner electrodes 3 Roasting powder