Process for preparing barium strontium titanate and cordierite glass ceramic composite medium material

A technology of barium strontium titanate and glass ceramics is applied in the field of radio frequency, which can solve the problems of inapplicability and low dielectric constant, and achieve the effects of widening the range, improving stability and reducing radio frequency loss.

Inactive Publication Date: 2006-01-25
NO 55 INST CHINA ELECTRONIC SCI & TECHNOLOGYGROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the dielectric constant of cordierite is very low, so it cannot be used in applications requiring high dielectric constant ceramics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: Making Φ80mm×3mm Ba 0.7 Sr 0.3 TiO 3 Target material, of which cordierite (2MgO·2Al 2 o 3 ·5SiO2 2 ) glass ceramics is 5% (by weight).

[0021] Process steps:

[0022] 1. Prepare Ba according to the above chemical molar ratio 0.7 Sr 0.3 TiO 3 Medium material particle diameter of ultrafine powder ≤ 1 micron.

[0023] 2. Magnesium oxide (MgO), aluminum oxide (Al 2 o 3 ), silicon dioxide (SiO 2 ) powder and the above-mentioned total weight 3% crystal nucleating agent titanium dioxide (TiO 2 ) uniformly mixed and ground to make ultra-fine powder with a particle diameter of ≤1 micron, after molding and sintering at a high temperature of 1200°C for 2 hours, the synthesized cordierite glass-ceramic medium is re-grinded to make a particle diameter of ≤1 micron The superfine powder is molded again, sintered at 1200°C for 2 hours, pulverized and ground to make a superfine powder with a particle diameter of ≤1 micron.

[0024] 3. Add 5% cordierite glass-ce...

Embodiment 2

[0026] Example 2: Making Φ80mm×3mm Ba 0.7 Sr 0.3 TiO 3 Target material, of which cordierite (2MgO·2Al 2 o 3 ·5SiO2 2 ) glass ceramics is 10% (by weight).

[0027] Process steps:

[0028] The procedure of Example 1 was repeated, wherein the proportion of cordierite glass-ceramic was 10% (by weight).

Embodiment 3

[0029] Example 3: Making Φ80mm×3mm Ba 0.7 Sr 0.3 TiO 3 Target material, of which cordierite (2MgO·2Al 2 o 3 ·5SiO2 2 ) glass ceramics is 30% (by weight).

[0030] Process steps:

[0031] The steps of Example 1 were repeated, wherein the proportion of cordierite glass-ceramic was 30% (by weight).

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PUM

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Abstract

The invention provides a process for preparing barium strontium titanate and cordierite glass ceramic composite medium material, which comprises, (1) preparing barium strontium titanate dielectric material, grinding into super fine powder, (2) uniformly mixing each oxide compound of the dielectric composition and grinding into super fine powder, die pressing, high temperature sintering, repulverizing and grinding into super fine powder, (3) loading the agglutination formed cordierite glass ceramics super fine powder uniformly into the barium strontium titanate super fine powder, uniformly mixing through grinding, die pressing and high temperature sintering, (4) preparing super fine powder with particle diameter <=1micrometer again, moulding, high-sintering to obtain the end product.

Description

Technical field: [0001] The invention belongs to the technical field of electronic ceramics and is mainly used in radio frequency occasions requiring a wide application range of the dielectric constant and low loss and good stability. Background technique: [0002] Electronic ceramics is an important branch of electronic materials. It has a wide range of uses, and has great advantages and development prospects. [0003] The recently developed barium strontium titanate dielectric material has been widely favored by people because of its excellent dielectric properties, low loss and compatibility with microwave monolithic integrated circuit technology, and has become one of the most promising microwave dielectric materials at present. First, it can be widely used in functional circuits such as tuning, storage, phase shifting, and switching. [0004] At present, the commonly used manufacturing method of barium strontium titanate dielectric material is to dope strontium titanat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/195C04B35/465C04B35/622
Inventor 林立强朱健张龙
Owner NO 55 INST CHINA ELECTRONIC SCI & TECHNOLOGYGROUP CO LTD
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