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Microwave dielectric ceramic for 5G waveguide with high dielectric constant as well as preparation method and application of microwave dielectric ceramic

A microwave dielectric ceramic, high dielectric constant technology, applied in the direction of waveguides, waveguide devices, circuits, etc., to achieve the effects of excellent microwave dielectric properties, reduced sintering temperature, and high dielectric constant

Pending Publication Date: 2022-03-15
无锡鑫圣慧龙纳米陶瓷技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, in the microwave dielectric material system with a dielectric constant of 90±5, there are many studies on the Ba-Ln-Ti tungsten bronze system, but because the tungsten bronze system itself has a seesaw problem between the quality factor and the temperature coefficient: that is While achieving a higher figure of merit, the temperature coefficient deviates more from zero

Method used

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  • Microwave dielectric ceramic for 5G waveguide with high dielectric constant as well as preparation method and application of microwave dielectric ceramic

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preparation example Construction

[0026] The present invention further provides a method for preparing the microwave dielectric ceramics for the high dielectric constant 5G waveguide, comprising the following steps:

[0027] (1) According to the molar percentage of BaCO 3 、TiO 2 、Sm 2 o 3 , La 2 O3, Bi 2 o 3 , MnO 2 Carry out batching, ball mill after mixing fully, dry and sieve after ball milling, then put into corundum crucible for heat preservation and pre-firing to obtain powder base material;

[0028] (2) fully ball-milling the powder base material obtained in step (1), drying, granulating, and sieving after ball-milling;

[0029] (3) The sieved mixed powder is pressed into shape, and finally sintered to obtain the microwave dielectric ceramic for 5G waveguide with high dielectric constant.

[0030] The thermal insulation pre-calcination process in the step (1) of the above method is thermal insulation roasting at 1000-1100° C. for 3-5 hours.

[0031] The sintering temperature in step (3) of the ...

Embodiment 1

[0038] The oxide mole percentage composition expression of the high dielectric constant 5G waveguide microwave dielectric ceramic of this embodiment 1 is: 10%BaO-60%TiO 2 -10% Sm 2 o 3 -10% Bi 2 o 3 -9.5% La 2 o 3 -0.5%MnO 2 .

[0039] The preparation method of the microwave dielectric ceramic for the high dielectric constant 5G waveguide of the embodiment 1 comprises the following steps:

[0040] (1) According to the oxide mole percentage in the composition expression to BaCO 3 、TiO 2 、Sm 2 o 3 、La 2 O3, Bi 2 o 3 , MnO 2 Carry out batching, ball mill after mixing sufficiently, dry and sieve after ball milling, then put into corundum crucible and heat-preserve and roast at 1000°C for 3 hours to obtain powder base material;

[0041] (2) The powder base material obtained in step (1) is fully ball-milled, dried, granulated, and sieved after ball-milling; wherein the granulation process is to mix the dried powder with polyvinyl alcohol aqueous solution, and then Ma...

Embodiment 2

[0044] The oxide mole percentage composition expression of the high dielectric constant 5G waveguide microwave dielectric ceramic of this embodiment 2 is: 10%BaO-70%TiO 2 -5% Sm 2 o 3 -9% Bi 2 o 3 -5% La 2 o 3 -1%MnO 2 .

[0045] The preparation method of the microwave dielectric ceramic for the high dielectric constant 5G waveguide of the embodiment 2 comprises the following steps:

[0046] (1) According to the oxide mole percentage in the composition expression to BaCO 3 、TiO 2 、Sm 2 o 3 、La 2 O3, Bi 2 o 3 , MnO 2 Carry out batching, ball mill after mixing sufficiently, dry and sieve after ball milling, then put into corundum crucible and heat-preserve and roast at 1000°C for 3 hours to obtain powder base material;

[0047] (2) The powder base material obtained in step (1) is fully ball-milled, dried, granulated, and sieved after ball-milling; wherein the granulation process is to mix the dried powder with polyvinyl alcohol aqueous solution, and then Made int...

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Abstract

The invention discloses microwave dielectric ceramic for a 5G waveguide with a high dielectric constant as well as a preparation method and application of the microwave dielectric ceramic. The microwave dielectric ceramic is prepared from the following oxide components in percentage by mole: 10 percent to 15 percent of BaO, 60 percent to 70 percent of TiO2, 5 percent to 10 percent of Sm2O3, 5 percent to 10 percent of Bi2O3, 5 percent to 10 percent of La2O3 and 0.5 percent to 1 percent of MnO2, the microwave dielectric ceramic comprises a basic crystal phase and a burning-reducing crystal phase, the composition expression of the basic crystal phase is Ba < 6-3x > (SmyLa < 1-y >) < 8 + 2x > (TizMn < 1-z >) < 18 > O54, and the composition expression of the burning-reducing crystal phase is Bi4Ti3O12. The microwave dielectric ceramic has a relatively high quality factor and a near-zero temperature coefficient of resonance frequency while ensuring a high dielectric constant, the preparation raw materials are non-toxic and low in price, the preparation process is simple, and the microwave dielectric ceramic has a wide application prospect in the field of 5G waveguides.

Description

technical field [0001] The invention belongs to the technical field of electronic ceramics and its preparation, and in particular relates to a microwave dielectric ceramic for a high dielectric constant 5G waveguide and its preparation method and application. Background technique [0002] With the development in recent decades, microwave dielectric ceramics have become a new type of functional ceramic material, which can perform one or more functions as a dielectric material in microwave frequency circuits. The microwave dielectric properties are the decisive factors for the application of microwave dielectric ceramics, and the relative permittivity ε r , quality factor Q×f and resonant frequency temperature coefficient τ f These are the three main parameters of microwave dielectric properties. [0003] With the rapid development of the 5G mobile communication system industry, as an important device in communication equipment, microwave components, especially filters and r...

Claims

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Application Information

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IPC IPC(8): C04B35/462H01P3/16H01P11/00C04B35/622
CPCC04B35/462H01P3/16H01P11/006C04B35/622C04B2235/3215C04B2235/3298C04B2235/3227C04B2235/3267C04B2235/96
Inventor 吉岸王晓慧金镇龙
Owner 无锡鑫圣慧龙纳米陶瓷技术有限公司
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