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Zinc-magnesium titanate system ceramic dielectric material and prepared ceramic capacitor

A technology of ceramic capacitors and ceramic dielectrics, applied in the direction of laminated capacitors, fixed capacitor electrodes, fixed capacitor dielectrics, etc., can solve problems such as harmful to the environment and human body, thermal stability, and insufficient dielectric properties

Inactive Publication Date: 2005-07-06
GUANGDONG FENGHUA ADVANCED TECH HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional high-frequency dielectric ceramic materials usually have insufficient performance in terms of thermal stability and dielectric properties, and all contain harmful elements such as lead (Pb), arsenic (As), cadmium (Cd), which are harmful to the environment and human body

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Raw materials with a purity of 99.5 or more, with 0.999 moles of Mg(OH) 2 , 0.001 mole of ZnO and 1 mole of TiO 2 Mixing ratio, ball milling and mixing evenly, pre-calcine the mixture at 1080-1130°C for 2.5 hours to obtain the main agglomerate zinc magnesium titanate Mg (1-x) Zn x TiO 3 (x=0.001).

[0028] Raw materials with a purity of 99.5 or more, with 1.999 moles of Mg(OH) 2 , 0.001 mole of ZnO and 1 mole of SiO 2 Mixing ratio, ball milling and mixing evenly, pre-calcine the mixture at 1140-1180°C for 2.5 hours to obtain the main agglomerate zinc magnesium silicate Mg (2-y) Zn y SiO 4 (y=0.001).

[0029] Then, auxiliary components were added to the main components in predetermined proportions, as shown in Table 1. Make ceramic materials according to the conventional material production process; then, according to the production process of chip MLCC, add organic binders and ethanol and other solvents to form a slurry, and make the slurry flow into a 20-micro...

Embodiment 2

[0035] Raw materials with a purity of 99.5 or more, with 0.999 moles of Mg(OH) 2 , 0.001 mol ZnO and 1 mol TiO 2 Mixing ratio, ball milling and mixing evenly, pre-calcine the mixture at 1080-1130°C for 2.5 hours to obtain the main agglomerate zinc magnesium titanate Mg (1-x) Zn x TiO 3 (x=0.001).

[0036] Raw materials with a purity of 99.5 or more, with 1.999 moles of Mg(OH) 2 , 0.001 mol ZnO and 1 mol SiO 2 Mixing ratio, ball milling and mixing evenly, pre-calcine the mixture at 1140-1180°C for 2.5 hours to obtain the main agglomerate zinc magnesium silicate Mg (2-y) Zn y SiO 4 (y=0.001).

[0037] Raw materials with a purity of 99.5 or more, mixed with ZnO and H in a predetermined ratio 3 BO 3 , ball milled evenly, and then pre-calcined the mixture for 2.5 hours, thus obtaining a uniform auxiliary component ZnO and B2O3 mixture.

[0038] Then add auxiliary components to the main components according to a predetermined ratio, as shown in Table 3, manufacture and te...

Embodiment 3

[0043] Raw materials with a purity of 99.5 or more, with 0.995 moles of Mg(OH) 2 , 0.005 mol ZnO and 1 mol TiO 2 Mixing ratio, ball milling and mixing evenly, pre-calcine the mixture at 1080-1130°C for 2.5 hours to obtain the main agglomerate zinc magnesium titanate Mg (1-x) Zn x TiO 3 (x=0.005).

[0044] Raw materials with a purity of 99.5 or more, with 1.98 moles of Mg(OH) 2 , 0.02 mol ZnO and 1 mol SiO 2 Mixing ratio, ball milling and mixing evenly, pre-calcine the mixture at 1140-1180°C for 2.5 hours to obtain the main agglomerate zinc magnesium silicate Mg (2-y) Zn y SiO 4 (y=0.02).

[0045] Raw materials with a purity of 99.5 or more, mixed with ZnO and H in a predetermined ratio 3 BO 3 , ball milled evenly, and then pre-calcined the mixture for 2.5 hours, thus obtaining a uniform auxiliary component ZnO and B2O3 mixture.

[0046] Then add auxiliary components to the main components in a predetermined proportion, as shown in Table 5, manufacture and test accor...

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Abstract

This invention discloses a high frequency thermal stable ceramic material and its ceramic capacitor. The material comprises the main component and assistant components, wherein the main components are 40í½55úÑ of Mg(1-x)ZnxTiO3(0.0001íœXíœ0.05) and 20í½25úÑ of Mg(2-y)ZnySiO4(0.0001íœXíœ0.05); the assistant components are 10í½15úÑ of ZnO and 3.0í½7.0úÑ of Al2O3 and 2.0í½6.0úÑ of SrO. The assistant components also comprise the following: 1.0í½2.5úÑ of B2O3íó0.5í½2.0úÑ of Nd2O5íó0.1í½0.5úÑ of MnO2íó0.1í½0.4úÑ of Co3O4 and one or more materials from K2OíóFe2O3íóCeO2 and SnO.

Description

technical field [0001] The present invention relates to a ceramic dielectric material with high frequency and low dielectric heat stability and the obtained ceramic capacitor, more specifically, the present invention relates to a zinc-magnesium titanate-based ceramic dielectric that does not contain harmful elements such as lead, arsenic, and cadmium Materials and resulting ceramic capacitors. Background technique [0002] MLCC is widely used in the manufacturing process of electronic equipment due to its small size, high reliability, and convenient placement. The market's demand for high-frequency capacitors is also increasing, and the requirements are higher, and the use frequency is developing to hundreds of megahertz or even several gigahertz microwave bands. Traditional high-frequency dielectric ceramic materials usually have insufficient performance in terms of thermal stability and dielectric properties, and all contain harmful elements such as lead (Pb), arsenic (As...

Claims

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Application Information

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IPC IPC(8): C04B35/462H01B3/12H01G4/008H01G4/12H01G4/30
Inventor 魏汉光李文君付振晓王作华周志珍张火光韩建宏
Owner GUANGDONG FENGHUA ADVANCED TECH HLDG
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