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High-temperature-stability microwave dielectric ceramic for WIFI and preparation method of high-temperature-stability microwave dielectric ceramic

A microwave dielectric ceramic and stable technology, which is applied in the field of microwave dielectric ceramics for high temperature stable WIFI and its preparation, can solve the problems of high process cost, high temperature coefficient of polytitanium-barium system products, high sintering temperature of polytitanium-barium system, etc. problems, to achieve the effect of simple preparation process, non-toxic preparation raw materials, excellent microwave dielectric properties

Active Publication Date: 2022-04-29
无锡鑫圣慧龙纳米陶瓷技术有限公司
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AI Technical Summary

Problems solved by technology

[0004] At present, in the microwave dielectric material system with a dielectric constant of 38±1, there are many studies on the polytitanium barium system, but the polytitanium barium system itself has the disadvantages of high sintering temperature and high process cost; The temperature coefficient of the polytitanium-barium system products is generally too large and needs to be adjusted

Method used

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  • High-temperature-stability microwave dielectric ceramic for WIFI and preparation method of high-temperature-stability microwave dielectric ceramic
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preparation example Construction

[0028] The present invention further provides a preparation method of the high-temperature stable WIFI microwave dielectric ceramic, comprising the following steps:

[0029] (1) According to the composition expression aBaTi 4 o 9 -bSnTiO 4 -cLi 2 SiO 3 -dZnSiO 3 Weigh the mole percentage of each element in BaCO 3 、TiO 2 , SiO 2 , Li 2 CO 3 , ZnO, SnO 2 , the weighed material is mixed fully and then ball milled, dried and sieved after ball milling, and then put into a corundum crucible for heat preservation and pre-fired to obtain a powder base material; wherein, in the composition expression aBaTi 4 o 9 -bSnTiO 4 -cLi 2 SiO 3 -dZnSiO 3 Among them, a, b, c, and d independently represent mole percentages, and satisfy the following conditions: 75mol%≤a≤85mol%, 5mol%≤b≤10mol%, 5mol%≤c≤10mol%, 5mol%≤d≤10mol% %, a+b+c+d=100mol%;

[0030] (2) fully ball milling the powder base material obtained in step (1), and then drying, granulating and sieving after ball milling;...

Embodiment 1

[0039] The high temperature stable type WIFI microwave dielectric ceramics of this embodiment 1, its composition expression aBaTi 4 o 9 -bSnTiO 4 -cLi 2 SiO 3 -dZnSiO 3 Among them, a=75mol%, b=10mol%, c=10mol%, d=5mol%.

[0040] The preparation method of the high temperature stable WIFI microwave dielectric ceramic of this embodiment 1 comprises the steps:

[0041] (1) Weigh the BaCO respectively according to the mole percentage of each element in the composition expression 3 、TiO 2 , SiO 2 , Li 2 CO 3 , ZnO, SnO 2 , mixing the weighed materials fully, ball milling, drying and sieving after ball milling, and then putting them into a corundum crucible and pre-burning at 1000°C for 3 hours to obtain a powder base material;

[0042] (2) The powder base material obtained in step (1) is fully ball-milled, then dried, granulated and sieved; wherein the granulated is mixed with the dried powder and polyvinyl alcohol solution, and then prepared into micron-sized spherical ...

Embodiment 2

[0046] The high temperature stable WIFI of this embodiment 2 microwave dielectric ceramics, its composition expression aBaTi 4 o 9 -bSnTiO 4 -cLi 2 SiO 3 -dZnSiO 3 Among them, a=75mol%, b=10mol%, c=5mol%, d=10mol%.

[0047] The preparation method of the high temperature stable WIFI microwave dielectric ceramic of this embodiment 2 comprises the steps:

[0048] (1) Weigh the BaCO respectively according to the mole percentage of each element in the composition expression 3 、TiO 2 , SiO 2 , Li 2 CO 3 , ZnO, SnO 2 , mixing the weighed materials fully, ball milling, drying and sieving after ball milling, and then putting them into a corundum crucible and pre-burning at 1000°C for 3 hours to obtain a powder base material;

[0049] (2) The powder base material obtained in step (1) is fully ball-milled, then dried, granulated and sieved; wherein the granulated is mixed with the dried powder and polyvinyl alcohol solution, and then prepared into micron-sized spherical parti...

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Abstract

The invention discloses high-temperature-stability microwave dielectric ceramic for WIFI (wireless fidelity), the composition expression of the microwave dielectric ceramic is aBaTi4O9-bSnTiO4-cLi2SiO3-dZnSiO3, and a, b, c and d independently represent molar percentages and meet the following conditions: 75 mol% < = a < = 85 mol%, 5 mol% < = b < = 10 mol%, 5 mol% < = c < = 10 mol%, 5 mol% < = d < = 10 mol%, and a + b + c + d = 100 mol%. The invention also discloses a preparation method of the high-temperature stable microwave dielectric ceramic for WIFI. The microwave dielectric ceramic has the advantages of excellent microwave dielectric property, low sintering temperature, high Q value, near-zero adjustable frequency temperature coefficient, good temperature stability, non-toxic preparation raw materials, low price and simple preparation process, and has wide application prospects in the field of WIFI communication.

Description

technical field [0001] The invention belongs to the technical field of electronic ceramics and its preparation, and in particular relates to a high-temperature stable microwave dielectric ceramic for WIFI and a preparation method thereof. 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 wide application of WIFI technology in ordinary household electrical communication and Internet access, as an important device in communication equipment, microwave components, especia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/468C04B35/622C04B35/64
CPCC04B35/4686C04B35/622C04B35/64C04B2235/3234C04B2235/3293C04B2235/3203C04B2235/3427C04B2235/3284C04B2235/656C04B2235/6567C04B2235/96
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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