BaO-TiO2 lead-free Y5U capacitor dielectric material and preparation method for same

A capacitor dielectric, ta2o5 technology, applied in the direction of fixed capacitor dielectric, fixed capacitor components, etc., to achieve the effect of optimizing synthesis and ball milling process and excellent dielectric properties
CN102617138AInactive Publication Date: 2012-08-01XIAMEN SUNYEAR ELECTRONICS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XIAMEN SUNYEAR ELECTRONICS CO LTD
Publication Date
2012-08-01
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses BaO-TiO2 lead-free Y5U capacitor dielectric material and a preparation method for the same. The dielectric material comprises a main component, sintering aids and modified adulterants; the main component adopts Ba(1-X-Y)MgXCaYTiO3 solid solution, wherein X is equal to 0.001 to 0.1 mol and Y is equal to 0.001 to 0.2 mol; the sintering aids adopt one or the mixture of at least two of low-melting-point oxide, such as Bi2O3, B2O3, CuO, V2O5, ZnO, SiO2, Al2O3 and the like, and low-melting-point glass dust; and the modified adulterant comprises one of or the mixture of at least two of different metal oxide, such as MgO, Ta2O5, Nb2O5, MnO2, ZrO2, CaO, La2O3, Nd2O3, Y2O3, CeO2, WO3, Dy2O3 and the like, and does not contain Pb. Lead-free Y5U capacitor dielectric material can be prepared through reasonable compounding, optimized synthesis and ball milling, which can be sintered within the temperature range of 1,310 to 1,350 DEG C and has excellent dielectric property, wherein epsilon r is equal to 9,500 plus or minus 800, D.F is less than or equal to 2.0 percent, and BDV(AC) is more than or equal to 3.5 kv / mm.
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Description

technical field

[0001] The present invention relates to a kind of BaO-TiO 2 It is a lead-free Y5U capacitor dielectric ceramic material and a preparation method thereof. Background technique

[0002] In the mass production and application of Y5U capacitor dielectric ceramic materials at the beginning of this century, SrTiO3 and PbTiO3 series dielectric materials are still the main materials, εr=6500±500, BDV(AC)≥3.0kv / mm, with the gradual implementation of EU Rohs directive, this Pb-containing products have been unable to meet market requirements, and BaTiO3-based products have gradually developed and matured, realizing Pb-free Y5U capacitor dielectric ceramics. With the development of products in the direction of low cost, ceramic capacitors must be miniaturized, and the dielectric ceramic materials used must develop in the direction of high dielectric constant and dielectric strength. At present, the dielectric ceramic material εr and BDV of Y5U capacitors in large-scale...

Claims

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