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High ceramic dielectric capacitor material with reduction resistance

A container material, high dielectric ceramic technology, applied in the field of capacitors, can solve the problems of difficult industrialization, high cost of raw materials, complex process, etc., and achieve the effect of good casting process, low sintering temperature and excellent comprehensive performance

Inactive Publication Date: 2017-05-31
BEIJING YUANLIU HONGYUAN ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the modifying agent in the invention publication number CN101182201A is processed by sol-gel method, which has complex process, low yield, high raw material cost, and difficulty in industrialization; CN101183610A and CN101880167A chemical co-precipitation method synthesizes coated barium titanate powder , the process of this method is strictly controlled, and it is difficult to realize industrialization

Method used

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  • High ceramic dielectric capacitor material with reduction resistance
  • High ceramic dielectric capacitor material with reduction resistance
  • High ceramic dielectric capacitor material with reduction resistance

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Embodiment 1

[0033] The invention provides an anti-reduction high dielectric capacitor material, which is composed of a main material and a modifier; wherein the main material is tetragonal phase BaTiO 3 , granularity D 50 =0.65 μm, purity ≥99.8wt%.

[0034] According to the weight ratio in Table 1, the main materials and modifiers were weighed (in grams), using deionized water as the medium, ball milling and mixing for 5 hours, drying at 120°C for 6 hours, taking out the ceramic powder, grinding and After passing through a 40-mesh sieve, it is packaged and stored in a ziplock bag.

[0035] Table 1

[0036]

[0037]

[0038] Performance assessment of the prepared material: Weigh 3g powder material, add 6.5wt% PVA aqueous solution for granulation, press it into a disc with Ф=10mm under 200MPa, sinter in reducing atmosphere, cool with the furnace, and carry out The surface of the sample is treated, and the electrode is coated and sintered. After making a disc capacitor, test the ca...

Embodiment 2

[0045] The invention provides an anti-reduction high dielectric capacitor material, which is composed of a main material and a modifier; wherein the main material is tetragonal phase BaTiO 3 , granularity D 50 =0.75 μm, purity ≥99.8wt%.

[0046] Table 4

[0047] Material composition Recipe 7 Recipe 8 Recipe 9 Recipe 10 Recipe 11 Recipe 12 BaTiO 3

100 100 100 100 100 100 BaCO 3

2.15 1.95 1.50 1.00 2.50 1.55 MnCO 3

0.20 0.14 0.14 0.20 0.15 0.08 SiO 2

1.45 1.50 1.80 1.35 1.10 1.40 CaCO 3

0.10 0.05 0 0.10 0 0 Mg(OH) 2

0.20 0.25 0.19 0.15 0.20 0.19 Y 2 o 3

0.86 0.85 0.85 0.83 0.80 0.65 al 2 o 3

0.05 0.02 0.04 0.04 0.04 0.03 Dy 2 o 3

0.28 0.32 0.30 0.28 0.35 0.45

[0048] According to the weight ratio in Table 4, the main materials and modifiers were weighed (in grams), using deionized water as the medium, ball milling...

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Abstract

The invention discloses a high ceramic dielectric capacitor material with reduction resistance. The material mainly consists of a main material and a modifier, wherein the main material is BaTiO3, and the modifier is BaCO3, MnCO3, SiO2, Mg(OH)2, Y2O3 and Dy2O3 as well as one or more of Nb2O5, CaCO3 and Al2O3, wherein the weight percent of the materials are as follows: 100 parts of BaTiO3, 1 to 2.5 parts of BaCO3, 0.08 to 0.25 part of MnCO3, 1 to 1.8 parts of SiO2, 0.15 to 0.25 part of Mg(OH)2, 0.65 to 0.95 part of Y2O3, 0.25 to 0.45 part of Dy2O3, 0 to 0.4 part of Nb2O5, 0 to 0.25 part of CaCO3, and 0 to 0.05 part of Al2O3. The capacitor material prepared by virtue of the components has the advantages of high dielectric constant, low loss and high insulation resistivity; a nickel electrode multilayer ceramic dielectric capacitor (MLCC) produced by using the material is good in casting technological performance and suitable for the sintering in the reduction atmosphere; the temperature characteristic of the MLCC satisfies X7R; and the MLCC has the advantages of high dielectric constant (sigma is greater than 3500), low loss, high insulation resistivity, low sintering temperature (1200 to 1240 DEG C), and the like.

Description

technical field [0001] The invention relates to the technical field of capacitors, in particular to an anti-reduction high-dielectric ceramic capacitor material, which can be used in the production of base metal internal electrodes MLCC. Background technique [0002] MLCC is widely used in bypass, filtering, tuning, oscillation and coupling circuits in various electronic machines, especially in the fields of computer power supply network, mobile communication equipment and automotive electronic equipment, and its demand is huge. With the request for small size and high capacity of MLCC, the dielectric layer of MLCC will continue to increase, and the area of ​​the internal electrode will also continue to increase, resulting in an increase in the production cost of MLCC, and the base metallization of the internal electrode of MLCC has become an inevitable development trend. . [0003] At present, the main developed MLCC internal electrodes are base metals such as Ni and Cu an...

Claims

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Application Information

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IPC IPC(8): C04B35/468H01G4/12H01G4/30
CPCC04B35/468C04B2235/3206C04B2235/3208C04B2235/3215C04B2235/3224C04B2235/3225C04B2235/3251C04B2235/3262C04B2235/3418C04B2235/96H01G4/1227H01G4/30
Inventor 杨魁勇程华容韩敬孙淑英宋蓓蓓
Owner BEIJING YUANLIU HONGYUAN ELECTRONICS TECH
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