Nano doping dielectric material for preparing base-metal inner-electrode multi-layer ceramic sheet type capacitor

Abstract

The invention discloses a base metal internal electrode multilayer ceramic chip capacitor dielectric material prepared by nano-doping, which belongs to the technical scope of capacitor material preparation. The ceramic material is composed of barium titanate BaTiO3 as the main material with a mole fraction of 90-98 mol% in the formula and nano dopant accounting for 2-10 mol% of the total material. In a reducing atmosphere, "two-stage" sintering or conventional sintering at a temperature range of 950 ° C to 1250 ° C can obtain X7R / X5R type MLCC materials with excellent performance. The room temperature dielectric constant of the material (wafer sample) can be Controlled at 2000-2600, capacity temperature change rate ≤ ± 15%, dielectric loss at room temperature ≤ 1.5%, ceramic grain size can be controlled at 100-200nm, good uniformity, suitable for production of large capacity, dielectric layer thickness less than Multilayer ceramic capacitors with an ultra-thin dielectric layer of 3 μm, high insulation resistivity, and stable performance.

Description

technical field

[0001] The invention belongs to the technical field of electronic ceramic capacitor materials, and in particular relates to a base metal internal electrode multilayer ceramic chip capacitor dielectric material prepared by nano-doping. In particular, it relates to the manufacture of ultra-fine-grained, temperature-stable base metal internal electrode multilayer ceramic chip capacitor dielectric material with base metal (such as nickel) as the internal electrode. Background technique

[0002] With the development trend of miniaturization and large capacity of electronic equipment and products, the application of surface mount technology is becoming more and more extensive. Electronic components for surface mounting are chip components. Multilayer ceramic capacitors are the most widely used type of chip components. Multilayer Ceramic Capacitors (MLCC) for short. It is prepared by a tape-casting-co-firing process, and the dielectric material and the electrode ...

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