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Microwave dielectric ceramic with low dielectric constant and low loss and preparation method

A technology of microwave dielectric ceramics and low dielectric constant, applied in the field of dielectric ceramics and its manufacturing, can solve the problems of high loss, unstable temperature coefficient, high dielectric constant, etc., achieve low dielectric loss, good environmental performance, low dielectric constant The effect of the electric constant

Active Publication Date: 2016-03-16
SUZHOU BOOM HIGH PURITY MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The technical problem to be solved by the present invention is how to overcome the defects of the existing low dielectric constant microwave dielectric ceramics, such as unstable frequency temperature coefficient, high dielectric constant, high loss, etc.

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  • Microwave dielectric ceramic with low dielectric constant and low loss and preparation method

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Embodiment 1

[0037] The invention provides a microwave dielectric ceramic with low dielectric constant and low loss. The main crystal phase structure formula of the microwave dielectric ceramic is: xZnO-yMgO-zB 2 o 3 , where x=1, y=0.2, z=3, and the raw materials of the main crystal phase of the microwave dielectric ceramic are: ZnO, MgO and H 3 BO 3 , the microwave dielectric ceramic also includes SiO with a mass fraction of 20%, 1% and 10% respectively 2 、TiO 2 and Al 2 o 3 .

[0038] Correspondingly, the present invention also provides a low dielectric constant, low loss microwave dielectric ceramic preparation method, comprising the following steps:

[0039] S1, the raw materials ZnO, MgO and H 3 BO 3 According to the chemical formula xZnO-yMgO-zB 2 o 3 The composition batching, wherein x=1, y=0.2, z=3, and put the raw material mixture according to the chemical formula batching into a ball mill, add deionized water and zirconia balls with a diameter of 2mm and ball mill at a ...

Embodiment 2

[0045] The invention provides a microwave dielectric ceramic with low dielectric constant and low loss. The main crystal phase structure formula of the microwave dielectric ceramic is: xZnO-yMgO-zB 2 o 3 , where x=2, y=1, z=2, and the raw materials of the main crystal phase of the microwave dielectric ceramic are: ZnO, MgO and H 3 BO 3 , the microwave dielectric ceramic also includes SiO with a mass fraction of 15%, 2% and 5% respectively 2 、TiO 2 and Al 2 o 3 .

[0046] Correspondingly, the present invention also provides a low dielectric constant, low loss microwave dielectric ceramic preparation method, comprising the following steps:

[0047] S1, the raw materials ZnO, MgO and H 3 BO 3 According to the chemical formula xZnO-yMgO-zB 2 o 3 The composition batching, wherein x=2, y=1, z=2, and put the raw material mixture according to the chemical formula batching into the ball mill, add deionized water and zirconia balls with a diameter of 2mm and ball mill at a spe...

Embodiment 3

[0053] The invention provides a microwave dielectric ceramic with low dielectric constant and low loss. The main crystal phase structure formula of the microwave dielectric ceramic is: xZnO-yMgO-zB 2 o 3 , where x=3, y=0.5, z=1, and the raw materials of the main crystal phase of the microwave dielectric ceramic are: ZnO, MgO and H 3 BO 3 , the microwave dielectric ceramic also includes SiO with a mass fraction of 5%, 4% and 15% respectively 2 、TiO 2 and Al 2 o 3 .

[0054] Correspondingly, the present invention also provides a low dielectric constant, low loss microwave dielectric ceramic preparation method, comprising the following steps:

[0055] S1, the raw materials ZnO, MgO and H 3 BO 3 According to the chemical formula xZnO-yMgO-zB 2 o 3 Composition batching, wherein x=3, y=0.5, z=1, and put the raw material mixture according to the chemical formula batching into a ball mill, add deionized water and zirconia balls with a diameter of 2mm and ball mill at a speed...

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Abstract

The invention discloses a microwave dielectric ceramic with low dielectric constant and low loss. The main crystalline phase structure of the microwave dielectric ceramic is: xZnO-yMgO-zB2O3, wherein x, y and z are molar ratios, x is greater than or equal to 1 and smaller than or equal to 3, y is greater than or equal to 0.2 and smaller than or equal to 1, and z is greater than or equal to 1 and smaller than or equal to 3, also 5-20% by mass of SiO2, 1-4% by mass of TiO2 and 5-15% by mass of Al2O3 are added into the main composition. The invention also discloses a preparation method of the microwave dielectric ceramic with low dielectric constant and low loss. Compared with the traditional technology of synthesis of powder by ceramic solid phase reaction, the method provided by the invention adopts fusion water quenching technique to prepare ceramic powder, and compared with the traditional method, the obtained ceramic has a lower sintering temperature. The microwave dielectric ceramic provided by the invention has the advantages of low dielectric constant, low dielectric loss, and good temperature stability, and compared with the traditional Al2O3 based ceramic substrate, the microwave dielectric ceramic has shorter signal delay time.

Description

technical field [0001] The invention relates to the field of dielectric ceramics and its manufacture, in particular to a microwave dielectric ceramic with low dielectric constant and low loss and a preparation method. Background technique [0002] Microwave dielectric ceramics (Microwave Dielectric Ceramics, MWDC) are used in microwave frequency (300MHz ~ 300GHz) circuits as dielectric materials and ceramics that perform one or more functions. They are widely used in modern communications as resonators, filters, dielectric antennas and Components such as dielectric waveguide circuits are the key basic materials of modern communication technology. They have been used in portable mobile phones, car phones, cordless phones, TV satellite receivers and military radars. It is playing an increasingly important role in the process of globalization and integration. [0003] Dielectric ceramics used in the microwave frequency band usually need to meet the following three conditions: ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/453C04B35/626C04B35/64
CPCC04B35/453C04B35/62665C04B35/64C04B2235/3206C04B2235/3217C04B2235/3232C04B2235/3409C04B2235/3418C04B2235/656C04B2235/96
Inventor 余洪滔龚毅辉徐海维
Owner SUZHOU BOOM HIGH PURITY MATERIALS TECH CO LTD
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