Vanadium-based temperature-stable ultralow-temperature sintered microwave dielectric ceramic material and preparation method thereof

A microwave dielectric ceramic and temperature-stable technology, which is applied in the field of electronic ceramics and its manufacturing, can solve the problems of restricting commercialization, and achieve the effects of low dielectric constant, good microwave dielectric properties, and low dielectric loss

Inactive Publication Date: 2015-09-02
XIAN UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its large resonant frequency temperature coefficient greatly limits its further commercialization.

Method used

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  • Vanadium-based temperature-stable ultralow-temperature sintered microwave dielectric ceramic material and preparation method thereof
  • Vanadium-based temperature-stable ultralow-temperature sintered microwave dielectric ceramic material and preparation method thereof
  • Vanadium-based temperature-stable ultralow-temperature sintered microwave dielectric ceramic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1. According to (Ba 0.50 Sr 0.50 )V 2 o 6 The stoichiometric ratio of the raw material BaCO was weighed 3 2.784g, SrCO 3 2.083g and V 2 o 5 5.133g, put the raw material, agate balls, and absolute ethanol in a mass ratio of 1:2:2 into a nylon ball mill jar, mix well and ball mill for 8 hours, and dry at 80-100°C for 3 hours.

[0021] 2. Put the dried mixture in step 1 into an alumina crucible, and pre-fire it at 500° C. for 3 hours to obtain a calcined powder.

[0022] 3. Put the calcined powder into a nylon ball mill jar, add agate balls and absolute ethanol, the mass ratio of the calcined powder to agate balls and absolute ethanol is 1:2:2, mix and ball mill for 8 hours, 80-100 °C for 3 hours.

[0023] 4. Adding 5% of its mass to the dried calcined powder in step 3 is 5% polyvinyl alcohol aqueous solution for granulation, and after passing through a 120 mesh sieve, use a powder tablet press to compress it under a pressure of 4MPa into A cylindrical green body ...

Embodiment 2

[0026] In step 1 of embodiment 1, according to (Ba 0.65 Sr 0.35 )V 2 o 6 The stoichiometric ratio of the raw material BaCO was weighed 3 3.545g, SrCO 3 1.428g and V 2 o 5 5.027g, put the raw material, agate balls, and absolute ethanol in a mass ratio of 1:2:2 into a nylon ball mill jar, mix well and ball mill for 8 hours, and dry at 80-100°C for 3 hours. The other steps are the same as in Example 1, and a vanadium-based temperature-stable ultra-low temperature sintered microwave dielectric ceramic material is prepared.

Embodiment 3

[0028] In step 1 of embodiment 1, according to (Ba 0.60 Sr 0.40 )V 2 o 6 The stoichiometric ratio of the raw material BaCO was weighed 3 3.295g, SrCO 3 1.643g and V 2 o 5 5.062g, put the raw material, agate balls and absolute ethanol in a mass ratio of 1:2:2 into a nylon ball mill jar, mix well and ball mill for 8 hours, and dry at 80-100°C for 3 hours. The other steps are the same as in Example 1, and a vanadium-based temperature-stable ultra-low temperature sintered microwave dielectric ceramic material is prepared.

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Abstract

The invention discloses a vanadium-based temperature-stable ultralow-temperature sintered microwave dielectric ceramic material and a preparation method thereof. The ceramic material consists of a material shown by a general formula (Ba1-xSrx)V2O6, wherein x is 0.35-0.55; and the ceramic material has good microwave dielectric properties (the dielectric constant is 9.3-11.1, the quality factor is 10000-14900GHz, and the temperature coefficient of resonance frequency is -10.2 to +9.1ppm / DEG C), is low in sintering temperature (575-650 DEG C), and can be matched and co-fired with an Al electrode. The vanadium-based temperature-stable ultralow-temperature sintered microwave dielectric ceramic material disclosed by the invention is prepared by virtue of traditional solid phase reaction, is rich in used raw materials, low in cost and beneficial for industrial production, and can be widely applied to the manufacturing of microwave devices including a low-temperature co-fired ceramic system, a multilayer dielectric resonator, a wave filter, a microwave substrate and the like.

Description

technical field [0001] The invention belongs to the technical field of electronic ceramics and its manufacture, and specifically relates to a novel microwave dielectric material, in particular to a vanadium-based temperature-stable ultra-low temperature sintered microwave dielectric ceramic material and a preparation method thereof. Background technique [0002] With the development of modern communication towards high frequency, low dielectric constant and low loss microwave dielectric materials have become an important development direction of information functional materials. Low dielectric constant microwave dielectric ceramic materials are mainly used to make dielectric antennas, dielectric substrates and other related devices in microwave communication systems and microwave circuits. At the same time, the miniaturization, integration, and chipping of modern communication equipment are also the direction and trend of future development. The multilayer structure design b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/495C04B35/622
Inventor 姚国光胡鹏邓相浩朱天阳王松
Owner XIAN UNIV OF POSTS & TELECOMM
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