X8R type MLCC medium material with bias voltage characteristic and stable temperature for medium temperature sintering

A dielectric material and stable technology, applied in the field of temperature-stabilized X8R type MLCC dielectric materials, can solve the problems of dielectric constant drop, etc., and achieve good formability, good development and industrialization prospects, good temperature stability and bias characteristics. Effect

Active Publication Date: 2014-12-03
BEIJING YUANLIU HONGYUAN ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used X7R ceramic materials can no longer meet the requirements of high-temperature environments, while general X8R ceramic materials meet the requirements of high-temperature environments, but their dielectric constant drops significantly under DC voltage

Method used

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  • X8R type MLCC medium material with bias voltage characteristic and stable temperature for medium temperature sintering
  • X8R type MLCC medium material with bias voltage characteristic and stable temperature for medium temperature sintering
  • X8R type MLCC medium material with bias voltage characteristic and stable temperature for medium temperature sintering

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Experimental program
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Effect test

Embodiment 1

[0045] A temperature-stable X8R type MLCC dielectric material with bias characteristics for medium-temperature sintering is composed of main materials, auxiliary materials, modifiers and sintering aids. Among them, the main material BaTiO 3 Granularity D 50 =0.65 μm, purity ≥99.8%.

[0046] Weigh Bi according to the molar ratio of 1.01:1.01:4 2 o 3 、Na 2 CO 3 and TiO 2 , mixed ball milling with absolute ethanol as the medium for 10 hours, dried at 80°C for 6 hours, ground and passed through a 120 mesh sieve, put into a crucible and pre-fired at 850°C for 2.5 hours to obtain sodium bismuth titanate powder, and used a self-sealing Bags are packaged for storage.

[0047] According to the molar ratio of 1:1, CaCO 3 and TiO 2Weigh, use deionized water as the medium, ball mill for 8 hours, dry at 120°C, pass through a 80-mesh sieve, and calcinate at 1060°C for 3 hours to obtain the CaTiO 3 , and sealed in a ziplock bag for storage.

[0048] Weigh H according to the ratio ...

Embodiment 2

[0056] A temperature-stable X8R type MLCC dielectric material with bias characteristics for medium-temperature sintering is composed of main materials, auxiliary materials, modifiers and sintering aids. Among them, the main material BaTiO 3 Granularity D 50 =0.75 μm, purity ≥99.8%.

[0057] Weigh Bi according to the molar ratio of 1.01:1.01:4 2 o 3 、Na 2 CO 3 and TiO 2 , mixed ball milling with absolute ethanol as medium for 10 hours, dried at 80°C for 6 hours, ground and passed through a 120-mesh sieve, put into a crucible and pre-fired at 850°C for 2.5 hours to obtain sodium bismuth titanate powder.

[0058] According to the molar ratio of 1:1, Mg(OH) 2 and TiO 2 Weigh, use deionized water as the medium, ball mill for 8 hours, dry at 120°C, pass through a 80-mesh sieve, and calcined at 1080°C for 3 hours to obtain the MgTiO 3 .

[0059] Weigh H according to the ratio of weight ratio 1:0.8:2.2:0.6 3 BO 3 , CaCO 3 , ZnO and SiO 2 ;Choose deionized water as the ba...

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Abstract

The invention provides an X8R type MLCC medium material with bias voltage characteristic and stable temperature for medium temperature sintering. The X8R type MLCC medium material comprises a main material, a secondary material, a modifier and a sintering aid. The X8R type MLCC medium material with stable temperature is simple in preparation process, can realize medium temperature sintering and has the performances that relative dielectric constant at room temperature is 1700-1950, loss at room temperature is less than or equal to 1.5%, insulation resistivity at room temperature is more than or equal to 5*10<12>ohm.cm, breakdown voltage is more than or equal to 5kv/mm, temperature characteristic meets X8R requirements and capacitance of the X8R MLCC medium material is more than or equal to -25% and less than or equal to +15% when a direct-current bias voltage is applied in 2kv/mm, so that the X8R type MLCC medium material has a good industrialization prospect.

Description

technical field [0001] The invention relates to the technical field of electronic information materials and components, in particular to a temperature-stabilized X8R type MLCC dielectric material with bias characteristics for medium-temperature sintering. Background technique [0002] With the application of electronic information terminal equipment in high-temperature environments, MLCCs that can work stably under high-temperature conditions have become an urgent need. Especially in the fields of aerospace, automobile industry, exploration and military mobile communication, requirements are put forward for the thermal stability and DC bias voltage of MLCC in a high temperature environment to ensure that the signal distortion is small. Commonly used X7R ceramic materials can no longer meet the requirements of high-temperature environments, while general X8R ceramic materials meet the requirements of high-temperature environments, but their dielectric constant decreases signi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/468C04B35/64
Inventor 杨魁勇陈仁政程华容宋蓓蓓杨喻钦
Owner BEIJING YUANLIU HONGYUAN ELECTRONICS TECH
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