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Ceramic composite material and method for processing members

A technology for ceramic composite materials and components, applied in the field of materials, can solve the problems of high alumina sintering temperature and high dielectric constant, and achieve the effect of reducing sintering temperature and reducing dielectric loss

Active Publication Date: 2013-09-11
KUANG CHI INST OF ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although alumina ceramics generally used have properties such as low dielectric loss and good sintering strength, their further application is limited due to high alumina sintering temperature and relatively high dielectric constant (about 9-10).

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh SiO according to the chemical composition in the table below 2 , H 3 BO 3 , (NH 4 )H 2 PO 4 , ZnO

[0023]

SiO 2

B 2 o 3

P 2 o 5

ZnO

wt%

75

15

6

4

[0024] Add the weighed raw materials into ethanol, use alumina as a ball mill in a planetary ball mill for 4 hours, then dry at 80°C for 6 hours, and then pre-fire the dried glass powder at 400°C;

[0025] Mix the calcined 5wt% glass powder and 95wt% alumina powder, add ethanol and binder for ball milling, dry and pass through a 60-mesh sieve to granulate, and then press to form under a pressure of 120MPa. The final product is heated slowly to 500°C at a rate of 1°C / min, and held for 1 hour to ensure that the binder is completely removed, and then heated to the highest sintering temperature of 1300°C at 10°C / min, kept for 3 hours, and then Cool down to 400°C at a rate of 20°C / min, and finally cool down to room temperature with the furnace ...

Embodiment 2

[0028] Weigh SiO according to the chemical composition in the table below 2 , H 3 BO 3 , (NH 4 )H 2 PO 4 , ZnO

[0029]

SiO 2

B 2 o 3

P 2 o 5

ZnO

wt%

75

15

6

4

[0030] Add the weighed raw materials into ethanol, use alumina as a ball mill in a planetary ball mill for 4 hours, then dry at 80°C for 6 hours, and then pre-fire the dried glass powder at 400°C;

[0031] Mix the calcined 15wt% glass powder and 85wt% alumina powder, add ethanol and binder for ball milling, dry and pass through a 60-mesh sieve to granulate, and then press to form under a pressure of 120MPa. The final product is heated slowly to 500°C at a rate of 1°C / min, and held for 1 hour to ensure that the binder is completely removed, and then heated to the highest sintering temperature of 1200°C at 10°C / min, kept for 3 hours, and then Cool down to 400°C at a rate of 20°C / min, and finally cool down to room temperature with the furnace...

Embodiment 3

[0034] Weigh SiO according to the chemical composition in the table below 2 , H 3 BO 3 , (NH 4 )H 2 PO 4 , ZnO

[0035]

SiO 2

B 2 o 3

P 2 o 5

ZnO

wt%

75

15

6

4

[0036] Add the weighed raw materials into ethanol, use alumina as a ball mill in a planetary ball mill for 4 hours, then dry at 80°C for 6 hours, and then pre-fire the dried glass powder at 400°C;

[0037] Mix the calcined 30wt% glass powder and 70wt% alumina powder, add ethanol and binder for ball milling, dry and pass through a 60-mesh sieve to granulate, and then press to form under a pressure of 120MPa. The final product is heated slowly to 500°C at a rate of 1°C / min, and held for 1 hour to ensure that the binder is completely removed, and then heated to the highest sintering temperature of 1100°C at 10°C / min, kept for 3 hours, and then Cool down to 400°C at a rate of 20°C / min, and finally cool down to room temperature with the furnace...

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PUM

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Abstract

The invention provides a ceramic composite material which comprises the following components in percentage by weight: 70-95% of aluminum oxide and 5-30% of glass powder. The invention further relates to a method for processing members by using the ceramic composite material. The material sintered and prepared by adding a certain amount of glass powder into aluminum oxide ceramic powder can be used for not only reducing the sintering temperature of aluminum oxide, but also reducing the dielectric loss to about 5 and the loss (the loss tangential angle is about 0.0002) of the material. The composite material can be widely applied to ceramic resonator support frames, circuit boards, metamaterial boards and the like.

Description

【Technical field】 [0001] The invention relates to the field of materials, in particular to a ceramic composite material and a method for processing components. 【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 applicat...

Claims

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Application Information

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IPC IPC(8): C04B35/10C04B35/622
Inventor 刘若鹏徐冠雄缪锡根周斌扬郭文鹏
Owner KUANG CHI INST OF ADVANCED TECH
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