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A low-temperature sinterable high dielectric constant zinc-niobium-titanium microwave dielectric ceramic and its preparation method

A technology of microwave dielectric ceramics and high dielectric constant, applied in the direction of ceramics, inorganic insulators, etc., can solve the problems of high energy consumption, high production cost, expensive raw materials, etc., and achieve the effect of reducing production cost and being easy to obtain

Inactive Publication Date: 2012-02-15
西安广芯电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the problems of expensive raw materials, high preparation costs, high energy consumption and low microwave dielectric constant of materials in the background technology

Method used

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  • A low-temperature sinterable high dielectric constant zinc-niobium-titanium microwave dielectric ceramic and its preparation method
  • A low-temperature sinterable high dielectric constant zinc-niobium-titanium microwave dielectric ceramic and its preparation method
  • A low-temperature sinterable high dielectric constant zinc-niobium-titanium microwave dielectric ceramic and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] In this example, nano-TiO 2 and analytically pure ZnO, Nb 2 o 5 、 Bi 2 o 3 , V 2 o 5 and CuO, by 0.1ZnNb 2 o 6 -0.9TiO 2 +aCuO+bBi 2 o 3 +cV 2 o 5 The stoichiometric ratio ingredients, where a=5wt%, b=1wt%, c=1wt%, a, b, c are 0.1ZnNb 2 o 6 -0.9TiO 2 total weight percent.

[0027] The preparation steps are:

[0028] (1) will analyze pure ZnO and Nb 2 o 5 According to the molar ratio of 1:1, mix and ball mill for 12 hours, dry it, put it into an alumina crucible, and calcinate at 1000°C for 4 hours to prepare ZnNb 2 o 6 .

[0029] (2) ZnNb 2 o 6 Add nano-TiO to the powder according to the material ratio 2 、 Bi 2 o 3 , V 2 o 5 And CuO ball milled for 12 hours and dried, the powder was put into an alumina crucible, calcined at 800°C, and the holding time was 4 hours.

[0030] (3) The calcined powder was ball-milled again for 12 hours, dried and passed through a 100-mesh sieve.

[0031] (4) The above-mentioned sieved powder was added into an aqu...

Embodiment 2

[0036] In this example, nano-TiO 2 and analytically pure ZnO, Nb 2 o 5 、 Bi 2 o 3 , V 2 o 5 and CuO, by 0.28ZnNb 2 o 6 -0.72TiO 2 +aCuO+bBi 2 o 3 +cV 2 o 5 The stoichiometric ratio ingredients, where a=5wt%, b=1wt%, c=1wt%, a, b, c are 0.28ZnNb 2 o 6 -0.72TiO 2 total weight percent.

[0037] The preparation steps are:

[0038] (1) will analyze pure ZnO and Nb 2 o 5 According to the molar ratio of 1:1, mix and ball mill for 12 hours, dry it, put it into an alumina crucible, and calcinate at 1000°C for 4 hours to prepare ZnNb 2 o 6 .

[0039] (2) ZnNb 2 o 6 Add nano-TiO to the powder according to the material ratio 2 、 Bi 2 o 3 , V 2 o 5 And CuO ball milled for 12 hours and dried, the powder was put into an alumina crucible, calcined at 750°C, and the holding time was 4 hours.

[0040] (3) The calcined powder was ball-milled again for 12 hours, dried and passed through a 100-mesh sieve.

[0041] (4) The above-mentioned sieved powder was added into an...

Embodiment 3

[0046] In this example, nano-TiO 2 and analytically pure ZnO, Nb 2 o 5 , V 2 o 5 and CuO, by 0.26ZnNb 2 o 6 -0.74TiO 2 +aCuO+cV 2 o 5 The stoichiometric ratio ingredients, where a=2.5wt%, c=1wt%, a, c account for 0.26ZnNb 2 o 6 -0.74TiO 2 total weight percent.

[0047] The preparation steps are:

[0048] (1) will analyze pure ZnO and Nb 2 o 5 According to the molar ratio of 1:1, mix and ball mill for 12 hours, dry it, put it into an alumina crucible, and calcinate at 1000°C for 4 hours to prepare ZnNb 2 o 6 .

[0049] (2) ZnNb 2 o 6 Add nano-TiO to the powder according to the material ratio 2 , V 2 o 5 And CuO ball milled for 12 hours and dried, the powder was put into an alumina crucible, calcined at 800°C, and the holding time was 4 hours.

[0050] (3) The calcined powder was ball-milled again for 12 hours, dried and passed through a 100-mesh sieve.

[0051] (4) The above-mentioned sieved powder was added into an aqueous solution of polyvinyl alcohol b...

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Abstract

The invention relates to a low-temperature sinterable high dielectric constant zinc-niobium-titanium microwave dielectric ceramic and a preparation method thereof. The microwave dielectric ceramic material is composed of xZnNb2O6-yTiO2+awt%CuO+bwt%Bi2O3+cwt%V2O5, and the preparation method The method is: mix the synthesized ZnNb2O6 powder with nanometer TiO2, V2O5, Bi2O3 and CuO by ball milling, and then obtain the microwave dielectric ceramic material of the present invention through drying, calcination, ball milling, sieving, granulation, molding, debinding and sintering. The preparation process of the present invention is stable and reproducible, and can be sintered into porcelain at a temperature of ≤900°C, and has excellent microwave dielectric properties: the dielectric constant is as high as 50-85, and the Q×f value is high (>6000GHz). It is suitable for making multi-layer microwave frequency devices such as chip high-frequency capacitors, chip dielectric resonators, filters, and antennas.

Description

technical field [0001] The invention relates to the field of microwave dielectric ceramic materials in the subject of materials, in particular to a low-temperature sinterable high dielectric constant zinc-niobium-titanium microwave dielectric ceramic and a preparation method thereof. Background technique [0002] Microwave dielectric ceramics refer to ceramic materials that are used as dielectric materials in microwave frequency circuits and perform one or more functions. They are suitable for making various microwave devices, such as electronic countermeasures, navigation, communications, radar, and household satellite direct TV receivers. It can also be used as the carrier of microwave circuits, dielectric antennas, dielectric waveguide circuits, etc. With the rapid development of mobile communication and satellite communication technology, communication terminals will develop in the direction of miniaturization, light weight, integration, high reliability and low cost. Du...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B3/12C04B35/46C04B35/622
Inventor 高峰吴昌英张丽娜李军
Owner 西安广芯电子科技有限公司
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