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Low-dielectric low-expanded cordierite glass-ceramic material taking perlite as main raw materials and preparation method thereof

A technology of glass-ceramics and main raw materials, applied in the field of dielectric ceramic materials, can solve the problems of large dielectric constant, dielectric loss and thermal expansion coefficient, deterioration of dielectric constant and dielectric loss, and difficult control of thermal expansion coefficient, etc., to achieve High mechanical strength, increased added value, and low cost effects

Active Publication Date: 2016-01-27
CHINA UNIV OF GEOSCIENCES (WUHAN) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, cordierite glass-ceramics prepared from natural minerals will lead to the formation of other crystal phases due to the introduction of impurities in the mineral itself, resulting in deterioration of the dielectric constant and dielectric loss, and the thermal expansion coefficient is difficult to control
Therefore, the main disadvantage of using natural minerals as raw materials to prepare cordierite glass-ceramics is that the formation of α-cordierite crystal phase is accompanied by other crystal phases, resulting in large dielectric constant, dielectric loss and thermal expansion coefficient, and poor stability of synthesized devices. , not conducive to mass production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Get 55g of perlite and pulverize it to below 200 mesh, add 45g of magnesium aluminum silicon to analyze pure oxide (SiO 2 、Al 2 o 3 , MgO are 15.2g, 20.0g, 9.8g respectively), the main oxide content of the formula is: SiO 2 54.1%, Al 2 o 3 27.0%, MgO10.1%, K 2 O2.3%, Na 2 O1.4%, other impurity 5.1%, obtain glass-ceramics raw material.

[0017] Mix 100g of glass-ceramic raw materials evenly, put them into a corundum crucible, melt them at 1550°C, keep them warm for 4 hours, then quench them in deionized cold water and dry them; put the water-quenched glass into a planetary ball mill for ball milling, and the ball milling medium For agate balls, add an appropriate amount of deionized water to wet ball milling for 8 hours (grinding into particles with an average particle size of 1-3 μm), and then dry at 110° C. to obtain glass powder.

[0018] Press the glass powder to form a green body: weigh 5g of glass powder, take 1mL of polyvinyl alcohol solution with a mass fr...

Embodiment 2

[0022] Get 42g of perlite and pulverize it to below 200 mesh, add 58g of magnesium aluminum silicon to analyze pure oxide (SiO 2 、Al 2 o 3 , MgO are 22.4g, 24.1g, 11.5g respectively), the main oxide content of the formula is: SiO 2 52.1%, Al 2 o 3 29.5%, MgO11.6%, K 2 O1.8%, Na 2 O 1.1%, other impurities 3.9%, to obtain glass-ceramic raw materials.

[0023] Mix 100g of glass-ceramic raw materials evenly, put them into a corundum crucible, melt them at 1550°C, keep them warm for 5.5 hours, then quench them in deionized cold water and dry them; put the water-quenched glass into a planetary ball mill for ball milling The medium is agate balls, added appropriate amount of deionized water for wet ball milling, and the ball milling time is 6 hours (grinding into particles with an average particle size of 1-3 μm), and then drying at 110° C. to obtain glass powder.

[0024] Press the glass powder to form a green body: weigh 5g of glass powder, take 1mL of polyvinyl alcohol solu...

Embodiment 3

[0028] Get 50g of perlite and pulverize it to below 200 mesh, add 50g of magnesium aluminum silicon to analyze pure oxide (SiO 2 、Al 2 o 3, MgO are 11.4g, 25.3g, 13.3g respectively), the main oxide content of the formula is: SiO 2 46.7%, Al 2 o 3 31.7%, MgO13.6%, K 2 O2.1%, Na 2 O1.3%, other impurity 4.6%, obtain glass-ceramics raw material.

[0029] Mix 100g of glass-ceramic raw materials evenly, put them in a corundum crucible, melt them at 1550°C, keep them warm for 5 hours, then quench them in deionized cold water and dry them; put the water-quenched glass into a planetary ball mill for ball milling, and the ball milling medium For agate balls, add an appropriate amount of deionized water to wet ball milling for 7 hours (grinding into particles with an average particle size of 1-3 μm), and then dry at 110° C. to obtain glass powder.

[0030] Press the glass powder to form a green body: weigh 5g of glass powder, take 1mL of polyvinyl alcohol solution with a mass frac...

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Abstract

The invention relates to a dielectric ceramic material and a preparation method of a low-dielectric low-expanded cordierite glass-ceramic material taking perlite as main raw materials. The preparation method is characterized by comprising the following steps that 1, perlite ore is taken as the raw materials to prepare glass-ceramic raw materials; 2, the prepared glass-ceramic raw materials are fused, quenched with water, ground and dried to obtain glass powder; 3, compression moulding is performed to prepare green bodies; 4, heat treatment is performed, wherein the green bodies are placed in a high temperature furnace, the temperature is increased to 850 DEG C-950 DEG C, the temperature increasing rate is 5-15 DEG C / min, heat preservation is performed for 6-10 h, the temperature is lowered along with the furnace, and then the low-dielectric low-expanded cordierite glass-ceramic material is obtained. The material prepared through the method has the advantages of being low in dielectric constant, dielectric loss and thermal expansion coefficient.

Description

technical field [0001] The invention relates to a dielectric ceramic material, in particular to an α-cordierite glass-ceramic material with perlite as the main raw material and a preparation method thereof. Background technique [0002] In recent years, driven by the rapid development of semiconductor technology, electronic components continue to develop in the direction of miniaturization, integration and high frequency. It is an inevitable requirement of the above trend to select appropriate ceramics that can be co-fired with silver and other conductive materials at a temperature not exceeding 950°C to make multilayer components or embed passive devices in multilayer circuit substrates. The low temperature co-fired ceramics (LowTemperatureCo-firedCeramics, referred to as LTCC) as the main dielectric material of source integration components has therefore become an important development trend. [0003] At present, the main problem restricting the successful application of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/08
Inventor 于永生李珍黄焱球宋丽井强山刘鹏宋鲁侠
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)