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

Inactive Publication Date: 2012-08-01
XIAMEN SUNYEAR ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the Y5U capacitor dielectric ceramic material εr and BDV in large-scale production and application are still low, and need to be further improved

Method used

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

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Embodiment Construction

[0011] A kind of BaO-TiO described in the present invention 2 It is a lead-free Y5U capacitor dielectric ceramic material and its preparation method, combined with the content of the above invention, it will be further described by the following examples.

[0012] (1) with BaCO 3 , CaCO3, MgCO3, TiO 2 and other raw materials, according to the composition ratio of Table 1, according to the preparation process of the main material described in the summary of the invention, Ba (1-X-Y) Mg X Ca Y TiO 3 .

[0013] Table 1 Main material Ba (1-X-Y) Mg X Ca Y TiO 3 Example recipe of

[0014]

[0015] (2) According to the composition of Table 2, the main material is Ba (1-X-Y) Mg X Ca Y TiO 3 Where X=0.001~0.1mol, Y=0.001~0.2mol, add Bi 2 o 3 , B 2 o 3 , CuO, V 2 o 5 , ZnO, SiO 2 , Al2O3, MgO, Ta 2 o 5 , Nb 2 o 5 , MnO 2 , ZrO2, CaO, La2O3, Nd2O3, Y2O3, CeO2, WO3, Dy2O3, add deionized water in a ball mill for ball milling and mixing, and dry to obtain Y5U c...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/468C04B35/622H01G4/12
Inventor 张军志邹海雄李太坤林康
Owner XIAMEN SUNYEAR ELECTRONICS CO LTD
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