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Low temperature sintered high-frequency high dielectric ceramic dielectric material

A ceramic dielectric, low-temperature sintering technology, applied in the direction of fixed capacitor dielectric, fixed capacitor components, etc., can solve the problems of enterprise survival, development difficulties, and high cost pressure.

Active Publication Date: 2012-06-27
GUANGDONG FENGHUA ADVANCED TECH HLDG
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Problems solved by technology

At present, the sintering temperature of multilayer chip ceramic capacitors using palladium-silver alloy as the internal electrode is generally above 1100°C. Therefore, the proportion of palladium in the palladium-silver alloy internal electrode should account for more than 30wt%. More expensive, when the price of capacitors does not rise, the cost pressure faced by manufacturers is greater, and it is difficult for enterprises to survive and develop

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  • Low temperature sintered high-frequency high dielectric ceramic dielectric material

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Embodiment

[0009] A low-temperature sintered high-frequency high-dielectric ceramic dielectric material, using BaLn 2 Ti 3+x o 10+2x In the composite ceramic material shown, Ln is selected from Nd among the rare earth elements, and x=1 to make a compound. First select the raw material BaCO with purity as analytical pure 3 、Nd 2 o 3 、TiO 2 Weighing, after conventional fine-tuning of components, wet mixing, drying, and calcination processes, the required main component BaNd 2 Ti 4 o 12 Material.

[0010] Add modification additives and sintering fluxes to the main component samples obtained by calcination, that is, material formulas No. 1 to 16 in Table 1, and then undergo conventional component fine-tuning, wet mixing, and drying processes to obtain the invention. ceramic dielectric material.

[0011] When these ceramic dielectric materials are made into MLCC products by conventional techniques, the sintering temperature is 1000°C to 1060°C. The obtained MLCC products have the c...

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Abstract

The invention discloses a high-frequency and high-permittivity ceramic dielectric material sintered at a low temperature. The ceramic dielectric material consists of a main component, a modifying additive and a sintering fluxing agent; the structural formula of the main component is expressed as BaLn2Ti3+xO10+2x, wherein, x is not less than 1 and not more than 2, Ln is one of or a plurality of La, Ce, Pr, Nd, Sm, Gd and Dy which are rare earth elements, the modifying additive is one of or a plurality of CaO, SrO, MnO, Bi2O3, Al2O3 and TiO2, and the sintering fluxing agent is one of or a plurality of B2O3, SiO2, V2O5, ZnO, CuO, Bi2O3 and BaO. The ceramic dielectric material complies with the COG ceramic dielectric properties and has the advantages of even material, even particle size distribution, high dispersivity, good forming process, and good dielectric property while meeting the environmental protection requirements.

Description

technical field [0001] The invention relates to a ceramic dielectric material, in particular to a high-frequency high-dielectric ceramic dielectric material which can be matched with silver-rich electrodes and used for MLCC manufacture. Background technique [0002] With the miniaturization of electronic equipment, the demand for multilayer chip ceramic capacitors is increasing. At present, multilayer chip ceramic capacitors with base metal nickel as internal electrodes with low material cost have been widely used, but the manufacturing process of multilayer chip ceramic capacitors with base metal nickel as internal electrodes is relatively complicated. The multilayer chip ceramic capacitor products produced by domestic small and medium-sized enterprises all use palladium or palladium-silver alloy as the internal electrode, and some multilayer chip ceramic capacitors that require high voltage and frequency of use still use palladium or palladium-silver alloy as the internal ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/462C04B35/622
CPCH01G4/08
Inventor 张火光宋永生魏汉光李明
Owner GUANGDONG FENGHUA ADVANCED TECH HLDG