Barium titanate ceramic dielectric material and capacitor prepared using barium titanate ceramic dielectric material
A technology of ceramic dielectric and barium titanate, which is applied in the direction of laminated capacitors, fixed capacitor dielectrics, fixed capacitor parts, etc., can solve the problem of high-efficiency automation in the production and assembly of light and small modules, and the large volume of wafer ceramic high-voltage capacitors , not suitable for high-voltage circuit applications, etc., to achieve the effect of good molding process, uniform material, and uniform particle size distribution
Inactive Publication Date: 2016-01-06
广州创天电子科技有限公司
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Problems solved by technology
Disc ceramic high-voltage capacitors are bulky, not suitable for surface mount (SMT), and cannot meet the requirements of light and small modules and high-efficiency automation of production and assembly
The high-voltage multilayer chip ceramic capacitor made of silver-palladium alloy as the inner electrode has high cost and is currently only used in a small range in the military field.
The current mainstream of conventional base metal nickel electrode multilayer chip ceramic capacitors is a low-voltage product below 100V, which is not suitable for the application of high-voltage circuits.
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[0013] A barium titanate ceramic dielectric material is prepared by the following method steps: calcining according to the method step conditions in Table 1, and then doping according to the method step conditions in Table 2 to obtain an anti-reduction barium titanate ceramic dielectric material; When these barium titanate ceramic dielectric materials are used to make MLCC products by conventional process methods, the firing temperature is shown in Table 2. The obtained MLCC products such as figure 1 As shown, the two ends are terminal electrodes, and the inner electrode is composed of alternately superimposed electric field shielding electrodes 1 and suspended inner electrodes 2. There is also a dielectric layer between the electrodes. This MLCC product has good dielectric withstand voltage, stable capacity, and good performance. The characteristics of the high-voltage MLCC product performance test parameters are shown in Table 2. The fabricated capacitor structure is as fi...
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The invention relates to the technical field of ceramic dielectric materials and components and parts prepared using the ceramic dielectric materials, in particular to a barium titanate ceramic dielectric material and a high voltage chip-type multilayer capacitor prepared using the barium titanate ceramic dielectric material, wherein the barium titanate ceramic dielectric material is prepared through the following method steps: A, calcining: calcining BaTiO3 powder with the initial particle size D50 being equal to 0.1-0.3 [mu]m for 2-3 hours at the temperature of 1100-1200 DEG C, the particle size D50 of calcined BaTiO3 powder is controlled to be equal to 0.8-1.5 [mu]m; B, doping, doping powder in the step A with oxide, the weight of oxide accounts for 4-8% of the total weight of powder in the step A; C, performing mixed dispersion on the powder in the step B through wet ball grinding, and further drying. The multilayer capacitor prepared using the barium titanate ceramic dielectric material has a nominal voltage of 10000V, uses a nickel electrode as the inner electrode, can realize low-cost base metallization of high voltage products, and can be extensively applied to civilian electronic products with low cost requirements.
Description
technical field [0001] The invention relates to a barium titanate ceramic dielectric material, in particular to a barium titanate ceramic dielectric material and the obtained chip multilayer ceramic capacitor. Background technique [0002] In the field of material application, electronic ceramic materials have been widely used in multilayer chip ceramic capacitors (MLCC), resistors, inductors, microwaves, integrated circuit substrates, optoelectronic devices, LC, RC, L-C-R composite components, sensors, etc. in electronic components. Disc ceramic high-voltage capacitors are bulky, not suitable for surface mount (SMT), and cannot meet the requirements of light and small modules and high-efficiency automation of production and assembly. The high-voltage multilayer chip ceramic capacitor made of silver-palladium alloy as the inner electrode has high cost and is only used in a small range in the military field at present. The current mainstream of conventional base metal nicke...
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IPC IPC(8): C04B35/468C04B35/622H01G4/12H01G4/30
Inventor 邝国威曹金南郑松文
Owner 广州创天电子科技有限公司
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