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High dielectric constant X8R type MLCC medium material and preparation method

A technology of high dielectric constant and dielectric materials, applied in the direction of fixed capacitor dielectric and fixed capacitor components, etc., to achieve the effects of improving dielectric temperature stability, increasing density, and reducing loss

Active Publication Date: 2012-10-10
FUJIAN TORCH ELECTRON TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the anti-reduction performance of MLCC materials to adapt to the problem of metal nickel as the inner electrode, and propose the idea of ​​the present invention

Method used

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  • High dielectric constant X8R type MLCC medium material and preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) First take analytically pure Nb 2 o 5 、Co 2 o 3 Accurately weigh 8.28g and 1.72g respectively, mix, sieve and calcinate at 800-900°C, ball mill and dry to obtain the precursor of niobium-cobalt compound;

[0031] (2) Accurately weigh 2.33gTiO 2 , 0.9gNa 2 O and 6.77gBi 2 o 3 Weighing, mixing, sieving, calcining at 800-900°C, ball milling and drying to obtain titanium bismuth sodium compound;

[0032] (3) For 3.13gCaO and 6.87gZrO 2 Weighing, mixing, sieving, calcining at 1150-1200°C, ball milling and drying to obtain zirconium-calcium compound;

[0033] (4) Convert 3.8gBi 2 o 3 , 2.2gZnO, 1gTiO 2 , 0.8H 3 BO 3 , 1gSiO 2Weigh, mix and sieve with 1.2g Ba(OH)2, melt at 1200°C, water quench, grind and sieve to obtain glass powder.

[0034] (5) Accurately weigh 100g of barium titanate synthesized by hydrothermal method, 2.5g of niobium-cobalt compound, BNT0.722, 1.25g of zirconium-calcium compound, 0.1g of manganese carbonate, 0.369g of cerium oxide, and 1...

Embodiment 2

[0036] (1) First take analytically pure Nb 2 o 5 、Co 2 o 3 Accurately weigh 8.31g and 1.69g respectively, mix, sieve and calcinate at 800-900°C, ball mill and dry to obtain the precursor of niobium-cobalt compound;

[0037] (2) Accurately weigh 2.33gTiO 2 , 0.9gNa 2 O and 6.77gBi 2 o 3 Weighing, mixing, sieving, calcining at 800-900°C, ball milling and drying to obtain titanium bismuth sodium compound;

[0038] (3) For 3.13gCaO and 6.87gZrO 2 Weighing, mixing, sieving, calcining at 1150-1200°C, ball milling and drying to obtain zirconium-calcium compound;

[0039] (4) Convert 3.8gBi 2 o 3 , 2.2gZnO, 1gTiO 2 , 0.8H 3 BO 3 , 1gSiO 2 Weigh, mix and sieve with 1.2g Ba(OH)2, melt at 1200°C, water quench, grind and sieve to obtain glass powder.

[0040] (5) Accurately weigh 100g of barium titanate synthesized by hydrothermal method, 2.14g of niobium-cobalt compound, 1.444g of BNT, 1.5g of zirconium-calcium compound, 0.17g of manganese carbonate, 0.8g of cerium oxide, ...

Embodiment 3

[0042] (1) First take analytically pure Nb 2 o 5 、Co 2 o 3 Accurately weigh 8.89g and 1.11g respectively, mix, sieve and calcinate at 800-900°C, ball mill and dry to obtain the precursor of niobium-cobalt compound;

[0043] (2) Accurately weigh 2.33gTiO 2 , 0.9gNa 2 O and 6.77gBi 2 o 3 Weighing, mixing, sieving, calcining at 800-900°C, ball milling and drying to obtain titanium bismuth sodium compound;

[0044] (3) For 3.13gCaO and 6.87gZrO 2 Weighing, mixing, sieving, calcining at 1150-1200°C, ball milling and drying to obtain zirconium-calcium compound;

[0045] (4) Convert 3.8gBi 2 o 3 , 2.2gZnO, 1gTiO 2 , 0.8H 3 BO 3 , 1gSiO 2 Weigh, mix and sieve with 1.2g Ba(OH)2, melt at 1200°C, water quench, grind and sieve to obtain glass powder.

[0046] (5) Accurately weigh 100g of barium titanate synthesized by hydrothermal method, 1.6g of niobium-cobalt compound, 1.805g of BNT, 1.5g of zirconium-calcium compound, 0.25g of manganese carbonate, 1.2g of cerium oxide, a...

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Abstract

The invention relates to a high dielectric constant X8R type MLCC medium material and a preparation method, the high dielectric constant X8R type MLCC medium material takes 100 weight parts of barium titanate as a base material, and the medium material comprises the following components by weight: 1.6-2.5 parts of niobium cobalt compound, 0.722-1.805 parts of titanium bismuth sodium compound, 1.25-2.0 parts of zirconium calcium compound, 1-3 parts of glass powder, 0.369-1.2 parts of one or a plurality of oxides of Ce, Yb, Dy and Ho and 0.1-0.25 part of manganese carbonate. The key and core of the present invention are characterized in that a proper amount of manganese carbonate, rare earth elements and a zirconium calcium compound are added, the rare earth element can be taken as a donor or an acceptor in the barium titanate dielectric ceramic material for doping and modifying, the movement of the intrinsic oxygen vacancy and the oxygen vacancy brought by other B site donor doping can be inhibited, the insulation resistivity of a material system, the ageing resistance and the reduction resistance of a material system can be increased, and the method provided by the invention can be used for making silver-palladium electrodes and nickel electrodes MLCC.

Description

technical field [0001] The invention relates to the field of functional ceramics, in particular to a high dielectric constant X8R type MLCC dielectric material and a preparation method thereof. Background technique [0002] In recent years, X7R (working temperature range -55°C ~ 125°C, capacity temperature change rate within ±15%) MLCC materials have been extensively studied and successfully applied at home and abroad, among which barium titanate-based materials are not used in production and application. It will cause harm to the environment and human body, and the performance of the prepared MLCC is excellent and stable, so it has attracted widespread attention and developed rapidly. However, with the continuous development of national defense technology, automobile industry, etc., the demand for MLCCs that can be applied in harsh working environments is becoming more and more extensive. For example, various vehicle-mounted electronic control systems include ABS, engine e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/468C04B35/622
CPCH01G4/08
Inventor 黄祥贤张子山蔡明通宋运雄谢显斌
Owner FUJIAN TORCH ELECTRON TECH CO LTD
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