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Barium niobate system microwave dielectric ceramic material and preparation method and application thereof

A technology of microwave dielectric ceramics and barium niobate, applied in waveguide devices, resonators, circuits, etc., can solve the problems of high sintering temperature and difficulty in industrial production

Active Publication Date: 2020-05-08
SHANDONG SINOCERA FUNCTIONAL MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the microwave dielectric ceramic material has the problem of high sintering temperature (above 1500°C), and it is not easy to realize industrial production. Therefore, how to realize the low temperature sintering of this material is very important

Method used

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  • Barium niobate system microwave dielectric ceramic material and preparation method and application thereof
  • Barium niobate system microwave dielectric ceramic material and preparation method and application thereof
  • Barium niobate system microwave dielectric ceramic material and preparation method and application thereof

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Embodiment 1

[0035] The barium niobate system microwave dielectric ceramic material described in this embodiment, based on the total amount of raw materials for its preparation, includes the following components in mass content:

[0036]

[0037]

[0038] Specifically, the low-melting glass powder includes the following components by weight:

[0039]

[0040] The preparation method of the barium niobate system microwave dielectric ceramic material described in this embodiment comprises the following steps:

[0041] (1) According to the selected mass content ratio, weigh the corresponding weight of BaCO 3 , Nb 2 o 5 , ZnO, CoO, NiO, add water (material: water = 1:0.4) and ammonium acrylate dispersant (accounting for 0.6wt% of the powder amount) and mix well, use a ball mill to pre-mix for 3h, and after ball milling, Use a horizontal sand mill (the grinding medium adopts 1.5mm zirconium balls) for further dispersion to obtain a uniformly dispersed slurry;

[0042] (2) Microwave-dr...

Embodiment 2

[0049] The barium niobate system microwave dielectric ceramic material described in this embodiment, based on the total amount of raw materials for its preparation, includes the following components in mass content:

[0050]

[0051] Specifically, the low-melting glass powder includes the following components by weight:

[0052]

[0053]

[0054] The preparation method of the barium niobate system microwave dielectric ceramic material described in this embodiment comprises the following steps:

[0055] (1) According to the selected mass content ratio, weigh the corresponding weight of BaCO 3 , Nb 2 o 5 , ZnO, CoO, NiO, add water (material: water = 1:0.6) and ammonium acrylate dispersant (accounting for 0.4wt% of the powder amount) and mix well, use a ball mill to pre-mix for 3h, and after ball milling, Use a horizontal sand mill (the grinding medium adopts 1.5mm zirconium balls) for further dispersion to obtain a uniformly dispersed slurry;

[0056] (2) Use a micr...

Embodiment 3

[0063] The barium niobate system microwave dielectric ceramic material described in this embodiment, based on the total amount of raw materials for its preparation, includes the following components in mass content:

[0064]

[0065] Specifically, the low-melting glass powder includes the following components by weight:

[0066]

[0067] The preparation method of the barium niobate system microwave dielectric ceramic material described in this embodiment comprises the following steps:

[0068] (1) According to the selected mass content ratio, weigh the corresponding weight of BaCO 3 , Nb 2 o 5 , ZnO, CoO, NiO, add water (material: water = 1:0.5) and ammonium acrylate dispersant (accounting for 0.5wt% of the amount of the crystal phase mixture) and mix evenly, use a ball mill to pre-mix for 3h, and in the ball mill Finally, use a horizontal sand mill (the grinding medium adopts 1.5mm zirconium balls) to further disperse to obtain a uniformly dispersed slurry;

[0069]...

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Abstract

The invention belongs to the technical field of microwave dielectric ceramic materials, and particularly relates to a barium niobate system microwave dielectric ceramic material. BaCO3, Nb2O5, ZnO, CoO and NiO are used as raw materials to synthesize a main sintering block, SiO2, BaO, CaO, B2O3 and Li2O are used as raw materials to synthesize low-melting-point glass powder, and then the main sintering block and the low-melting-point glass powder are mixed and dispersed to obtain the required barium niobate system microwave dielectric ceramic material. The dielectric constant of the microwave dielectric ceramic material reaches 33-36, f*Q at 25 DEG C is larger than 80000, the frequency temperature coefficient calculated by testing the resonant frequencies f at -40 DEG C, 25 DEG C and 110 DEGC is low and is only -5 ppm / DEG C to 5 ppm / DEG C, and the performance of the microwave dielectric ceramic material meets the requirements of microwave dielectric ceramic devices. Meanwhile, the material also has relatively good dielectric properties in a millimeter wave frequency band, and the method can be used for producing ceramic devices such as filters and resonators.

Description

technical field [0001] The invention belongs to the technical field of microwave dielectric ceramic materials, specifically relates to a barium niobate system microwave dielectric ceramic material, and further discloses its preparation method and application. Background technique [0002] Microwave dielectric ceramic materials refer to ceramics that are used as dielectric materials in microwave frequency bands (mainly UHF, SHF frequency bands, 300MHz-300GHz) circuits and perform one or more functions. They have low dielectric loss and low resonance frequency temperature coefficient. It is an important component of resonators, filters, duplexers, antennas, frequency stabilized oscillators, waveguide transmission lines and other devices, and can be widely used in personal portable mobile phones, microwave base stations, car phones, satellite communications, military Radar and many other fields. [0003] As we all know, the Ministry of Industry and Information Technology issue...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/495C04B35/622C04B35/64C03C12/00H01P1/20H01P7/10H01P11/00
CPCC04B35/495C04B35/622C04B35/64C03C12/00H01P1/2002H01P7/10H01P11/007H01P11/008C04B2235/3215C04B2235/3255C04B2235/3275C04B2235/3279C04B2235/3284C04B2235/365
Inventor 刘光明应红杨月霞杨彬孙秀坤宋锡滨
Owner SHANDONG SINOCERA FUNCTIONAL MATERIAL CO LTD
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