Porous glass ceramic material, preparation method and prepared metamaterial substrate

A technology of porous glass ceramics and substrates, applied in the direction of electrical components, antennas, etc., can solve problems such as limited effects, achieve low dielectric constant, scientific and reasonable preparation methods, and widely used effects

Active Publication Date: 2014-04-16
KUANG CHI INST OF ADVANCED TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the research of low dielectric glass / ceramics mainly focuses on finding materials with low dielectric constant characteristics, but the effect is limited. The dielectric constant of glass-ceramic with the lowest dielectric constant is about 5, and it is necessary to further reduce the dielectric constant. The electrical constant meets the current requirements for the use of low dielectric materials in various fields, especially in the field of metamaterials

Method used

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  • Porous glass ceramic material, preparation method and prepared metamaterial substrate

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Effect test

Embodiment 1

[0038] 74.5% SiO by weight 2 , 13.6%H 3 BO 3 , 7.4% (NH 4 )H 2 PO 4 Mix with 4.5% ZnO raw materials and add ethanol, use alumina balls as ball mills, mill in a planetary ball mill for 4 hours, then dry at 80°C for 12 hours, and pre-calcine the dried powder at 400°C for 2 hours;

[0039]Add 15.5%wt stearic acid pore-forming agent and 5.2%wt polyvinyl alcohol binder to the pre-calcined powder for secondary ball milling, spray dry and pass through a 60-mesh sieve for granulation, and the granulated powder The material is formed by two-way pressure at 120MPa; after compression molding, the temperature is slowly raised to 500°C at a rate of 1°C / min in a high-temperature electric furnace, and kept for 2 hours to ensure that the polyvinyl alcohol binder and stearic acid pore-forming agent are completely removed. Then rapidly raise the temperature at 10°C / min to the highest firing temperature of 950°C, and keep it warm for 3 hours, then cool down to 400°C at a cooling rate of 20°...

Embodiment 2

[0042] 74.5% SiO by weight 2 , 13.6%H 3 BO 3 , 11.9% (NH 4 )H 2 PO 4 Mix with 0% ZnO raw materials and add ethanol, use alumina balls as ball mills, mill in a planetary ball mill for 4 hours, then dry at 80°C for 12 hours, and pre-calcine the dried powder at 400°C for 2 hours;

[0043] Add 10.5%wt stearic acid pore-forming agent and 5.2%wt polyvinyl alcohol binder to the pre-calcined powder for secondary ball milling, spray dry and pass through a 60-mesh sieve for granulation, and the granulated powder The material is formed by two-way pressure at 120MPa; after compression molding, the temperature is slowly raised to 500°C at a rate of 1°C / min in a high-temperature electric furnace, and kept for 2 hours to ensure that the polyvinyl alcohol binder and stearic acid pore-forming agent are completely removed. Then rapidly raise the temperature at 10°C / min to the highest firing temperature of 950°C, and keep it warm for 2 hours, then cool down to 400°C at a cooling rate of 20°...

Embodiment 3

[0046] 74.5% SiO by weight 2 , 13.6%H 3 BO 3 , 2.1% (NH 4 )H 2 PO 4 Mix with 9.8% ZnO raw material and add ethanol, use alumina balls as ball mills, mill in a planetary ball mill for 4 hours, then dry at 80°C for 12 hours, and pre-calcine the dried powder at 400°C for 2 hours;

[0047] Add 12.5%wt stearic acid pore-forming agent and 5.2%wt polyvinyl alcohol binder to the pre-calcined powder for secondary ball milling, spray dry and pass through a 60-mesh sieve for granulation, and the granulated powder The material is formed by two-way pressure at 120MPa; after compression molding, the temperature is slowly raised to 500°C at a rate of 1°C / min in a high-temperature electric furnace, and kept for 2 hours to ensure that the polyvinyl alcohol binder and stearic acid pore-forming agent are completely removed. Afterwards, the temperature was rapidly raised to a maximum firing temperature of 950°C at 10°C / min, and kept at a temperature of 4 hours, then cooled to 400°C at a cool...

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Abstract

The invention provides a porous glass ceramic material, a preparation method and a prepared metamaterial substrate. The preparation method comprises the following steps of: selecting ZnO-B2O3-P2O5-SiO2 system glass ceramic, adopting and adding a plastic pore-forming agent and sintering to prepare the porous glass ceramic material; the dielectric constant of the prepared porous glass ceramic material can be reduced to 2-3, and the loss tangent angle can also be reduced to about 0.0001; furthermore, the preparation method has the advantages of science, reasonableness and simplicity and easiness in operation; and the substrate with low dielectric constant and low loss, which is prepared by the porous glass ceramic material, can meet the requirements of the metamaterial substrate on the dielectric constant and the loss and be widely applied in the field of metamaterials.

Description

【Technical field】 [0001] The invention relates to a porous glass ceramic material, a preparation method and a prepared supermaterial substrate. 【Background technique】 [0002] In recent years, with the rapid development of modern communication technologies such as mobile communication, satellite communication, global satellite positioning system (GPS), Bluetooth technology, and wireless local area network (WLAN), microwave technology is also moving towards higher frequencies, that is, towards millimeter waves and submillimeters. direction of the wave. Research on low dielectric constant microwave dielectric ceramic materials has attracted more and more attention. Such materials can be widely used in satellite communications, missile remote control and global satellite positioning system (GPS) antennas, communication equipment, etc. In addition to requiring ceramics to have low dielectric loss and low resonant frequency temperature coefficient, these applications also requir...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C10/14H01Q15/00
Inventor 刘若鹏栾琳缪锡根周斌扬郭文鹏
Owner KUANG CHI INST OF ADVANCED TECH
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