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Low-dielectric-constant microwave dielectric ceramic material and preparation method thereof

A technology of microwave dielectric ceramics and low dielectric constant, which is applied in the field of electronic information materials and devices, can solve the problems of increasing the dielectric loss of materials and being difficult to use, and achieves the effects of low cost, simple preparation method and abundant raw materials

Active Publication Date: 2015-06-03
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although glass-ceramic materials can be sintered at lower temperatures, due to the introduction of a large amount of low-melting glass substances, the dielectric loss of the material is increased, and it is difficult to use at high frequencies.

Method used

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  • Low-dielectric-constant microwave dielectric ceramic material and preparation method thereof
  • Low-dielectric-constant microwave dielectric ceramic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1. Mixing

[0025] Take Li with a purity greater than 99.9% 2 CO 3 Powder 2.500g (0.033mol), MgO powder 4.012g (0.099mol), SnO 2 Mix 5.023g (0.033mol) of powder evenly, put the raw material mixture, zirconia balls, and absolute ethanol in a mass ratio of 1:2:2, put them into a ball mill jar, mix and ball mill for 8 hours at 360 rpm, at 80-100°C Let dry for 12 hours.

[0026] 2. Pre-burning

[0027] Put the dried mixture in step 1 into an alumina crucible, raise the temperature to 1000°C at a heating rate of 2°C / min, and pre-fire at a constant temperature for 4 hours to obtain calcined powder.

[0028] 3. Secondary mixing

[0029] Put calcined powder, zirconia balls, and absolute ethanol in a mass ratio of 1:2:2 into a ball mill jar, mix thoroughly and ball mill for 8 hours, and dry at 80-100°C for 12 hours.

[0030] 4. Granulation and molding

[0031] Add its mass fraction to the calcined powder after step 3 drying and be 5% polyvinyl alcohol aqueous solution to ...

Embodiment 2

[0035] In step 5 of embodiment 1, the cylindrical green body was sintered at 1340° C. for 6 hours, and other steps were the same as in embodiment 1 to obtain a low dielectric constant microwave dielectric ceramic material.

Embodiment 3

[0037] In step 5 of embodiment 1, the cylindrical green body was sintered at 1320° C. for 6 hours, and other steps were the same as in embodiment 1 to obtain a low dielectric constant microwave dielectric ceramic material.

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Abstract

The invention discloses a low-dielectric-constant microwave dielectric ceramic material and a preparation method thereof. The ceramic material comprises 42wt%-95wt% of Li2Mg3SnO6 and Mg2SnO4 in balancing amount. The dielectric constant of the ceramic material is 7.8-8.8, the dielectric loss is 0.00,007-0.00,019, Q*f is 72,000-123,000GHz, and the temperature coefficient of resonant frequency is -40ppm / DEG C to -31ppm / DEG C. The ceramic material is prepared by a high-temperature solid-phase reaction method. The preparation method of the ceramic material is simple, the raw materials are abundant and low in cost, industrial production is facilitated, and the prepared ceramic material has stable performance, can be used as a material for manufacturing an electronic circuit substrate, a dielectric resonator, a filter, a high-frequency satellite microwave device substrate and a microstrip line, and has important application prospects and economic values in the fields of electronic circuit, microwave mobile communication, satellite communication and radar system.

Description

technical field [0001] The invention belongs to the technical field of electronic information materials and devices thereof, and in particular relates to a low dielectric constant microwave dielectric ceramic material and a preparation method thereof. Background technique [0002] Microwave dielectric ceramics refer to ceramic materials used in microwave frequency (300MHz-300GHz) circuits as dielectric materials to complete one or more functions. Ideal microwave dielectric ceramics have a suitable dielectric constant (ε r ), high quality factor (Q×f) and temperature coefficient of resonant frequency tending to zero (τ f ). Components such as resonators, filters, and microwave integrated circuit substrates made of microwave dielectric ceramics have been widely used in modern communication technologies such as mobile communications, wireless local area networks, and military communications. In addition, as the operating frequency of communication equipment continues to incr...

Claims

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Application Information

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IPC IPC(8): C04B35/453C04B35/622
Inventor 刘鹏付志粉马建立李晶陈晓明冯琴琴
Owner SHAANXI NORMAL UNIV