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Borate-based low-dielectric microwave dielectric ceramic and preparation method thereof

A technology of microwave dielectric ceramics and borates, applied in waveguide devices, circuit substrate materials, resonators, etc., can solve problems such as system heating, signal delay, and signal crosstalk, and achieve low sintering temperature, high quality factor, The effect of alleviating signal delay

Inactive Publication Date: 2021-10-29
WENZHOU ADVANCED MFG TECH INST OF HUAZHONG UNIV OF SCI & TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] Aiming at the deficiencies in the prior art, the present invention provides a borate-based low dielectric microwave dielectric ceramic and its preparation method, thereby alleviating the signal time delay, signal crosstalk, system heating, etc. existing in the prior art question

Method used

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  • Borate-based low-dielectric microwave dielectric ceramic and preparation method thereof
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  • Borate-based low-dielectric microwave dielectric ceramic and preparation method thereof

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Embodiment Construction

[0025] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described below in conjunction with the embodiments and accompanying drawings. The specific embodiments described here are only used to explain the present invention, but are not intended to limit the present invention. Researchers in the field can design many other modification schemes according to the present invention, and these modification schemes will fall within the scope of the principles disclosed in this application within.

[0026] Such as figure 1 Shown, a kind of preparation method of borate-based low dielectric microwave dielectric ceramics comprises:

[0027] (1) CaCO 3 and H 3 BO 3 According to the chemical formula Ca x B 2 o 3+x For batching, where 0.3≤x≤3.0, to compensate for the volatilized boron element at high temperature, when weighing H 3 BO 3 When there is an excess of 15wt% in its quality, the mixed r...

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Abstract

The invention discloses borate-based low-dielectric microwave dielectric ceramic and a preparation method thereof, the chemical composition of the microwave dielectric ceramic is Ca<x>B<2>O<3+x>, and x is more than or equal to 0.3 and less than or equal to 3.0. The dielectric constant of the microwave dielectric ceramic ranges from 5.62 to 10.12, the quality factor ranges from 13161 GHz to 52416 GHz, and the temperature coefficient of resonance frequency ranges from-20.42 ppm / DEG C to-54.65 ppm / DEG C. The microwave dielectric ceramic is obtained by heating to 700 DEG C at a speed of 5 DEG C / min, preserving heat for 3 hours to finish presintering synthesis, heating to 750-1275 DEG C at a speed of 5 DEG C / min, and preserving heat for 3 hours to finish sintering. The microwave dielectric ceramic prepared in the invention has the advantages of low dielectric constant, high quality factor and low sintering temperature, and is suitable for preparing LTCC substrates, dielectric resonators, filters, dielectric antennas and other microwave communication devices.

Description

technical field [0001] The invention belongs to the technical field of microwave dielectric ceramics, and more specifically relates to a borate-based low dielectric microwave dielectric ceramic and a preparation method thereof. Background technique [0002] Microwave dielectric ceramics are key materials for preparing electronic components such as radio frequency capacitors, circuit substrates, dielectric filters, and dielectric antennas, and are therefore widely used in various wireless communication systems. As the communication spectrum gradually expands to the high-frequency range, microwave and millimeter-wave communication is gradually popularized, which makes the integration and operating frequency of communication equipment continue to increase, resulting in increasingly severe problems such as signal delay, signal crosstalk, and system heating. Electronic components made of low dielectric microwave dielectric ceramics can effectively alleviate the above problems and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/01C04B35/622C04B35/626C04B35/64H01P1/20H01P7/10H05K1/03
CPCC04B35/01C04B35/622C04B35/64C04B35/62605H05K1/0306H01P1/2002H01P7/10C04B2235/3208C04B2235/3409
Inventor 宋小强雷文吕文中王晓川张猛
Owner WENZHOU ADVANCED MFG TECH INST OF HUAZHONG UNIV OF SCI & TECH
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