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Dielectric adjustable low-loss wolframite microwave dielectric ceramic and preparation method thereof

A technology of microwave dielectric ceramics and wolframite, which is applied in the field of electronic information materials and devices, to achieve the effects of stable and single composite phase, low synthesis temperature and precise control of stoichiometric ratio

Active Publication Date: 2016-08-31
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in China, the application of this series of materials has not yet reached the performance index of foreign products, and the Q·ƒ value of domestic products is far lower than that of foreign products.

Method used

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  • Dielectric adjustable low-loss wolframite microwave dielectric ceramic and preparation method thereof
  • Dielectric adjustable low-loss wolframite microwave dielectric ceramic and preparation method thereof
  • Dielectric adjustable low-loss wolframite microwave dielectric ceramic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Mixing: According to ZnSn x Ti 1-x Nb 2 O 8 (x=0.40) The stoichiometric ratio of the microwave dielectric ceramic phase, using a precision balance to weigh 4.0695g of zinc oxide (ZnO) with a purity of 99.99%, titanium oxide (TiO 2 )2.3950g, tin oxide (SnO 2 )3.0138g and niobium oxide (Nb 2 o 5 ) 13.2905g, pour the weighed powder into the mixing bottle, and add 40g of absolute ethanol and 400g of zirconia grinding balls. The grinding balls with a diameter of 1 cm and a diameter of 0.5 cm are loaded in a mass ratio of 2:1; the mixing bottle of powder, grinding balls and absolute ethanol is placed on the mixer for continuous mixing for about 24 hours, and the mixer The rotation speed is 200 r / min; the mixed slurry and the grinding balls are separated by a coarse screen, and the separated slurry is dried in a drying oven at 70-90°C.

[0025] (2) Pre-burning: put the dried powder in step (1) in a muffle furnace and pre-burn at 1050°C for 4 hours to obtain t...

Embodiment 2

[0031] (1) Mixing: According to ZnSn x Ti 1-x Nb 2 O 8 (x=0.425) The stoichiometric ratio of the microwave dielectric ceramic phase, using a precision balance to weigh 4.0695g of zinc oxide (ZnO) with a purity of 99.99%, titanium oxide (TiO 2 )2.2961g, tin oxide (SnO 2 )3.2022g and niobium oxide (Nb 2 o 5 ) 13.2905g, pour the weighed powder into the mixing bottle, and add 40g of absolute ethanol and 400g of zirconia grinding balls. The grinding balls with a diameter of 1 cm and a diameter of 0.5 cm are loaded in a mass ratio of 2:1; the mixing bottle of powder, grinding balls and absolute ethanol is placed on the mixer for continuous mixing for about 24 hours, and the mixer The rotation speed is 200 r / min; the mixed slurry and the grinding balls are separated by a coarse screen, and the separated slurry is dried in a drying oven at 70-90°C.

[0032] (2) Pre-burning: put the dried powder in step (1) in a muffle furnace and pre-burn at 1050°C for 4 hours to obtain ...

Embodiment 3

[0038] (1) Mixing: According to ZnSn x Ti 1-x Nb 2 O 8 (x=0.45) The stoichiometric ratio of the microwave dielectric ceramic phase, using a precision balance to weigh 4.0695g of zinc oxide (ZnO) with a purity of 99.99%, titanium oxide (TiO 2 )2.1963g, tin oxide (SnO 2 )3.3905g and niobium oxide (Nb 2 o 5 ) 13.2905g, pour the weighed powder into the mixing bottle, and add 40g of absolute ethanol and 400g of zirconia grinding balls. The grinding balls with a diameter of 1 cm and a diameter of 0.5 cm are loaded in a mass ratio of 2:1; the mixing bottle of powder, grinding balls and absolute ethanol is placed on the mixer for continuous mixing for about 24 hours, and the mixer The rotation speed is 200 r / min; the mixed slurry and the grinding balls are separated by a coarse screen, and the separated slurry is dried in a drying oven at 70-90°C.

[0039] (2) Pre-burning: put the dried powder in step (1) in a muffle furnace and pre-burn at 1050°C for 4 hours to obtain t...

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Abstract

The invention discloses a dielectric adjustable low-loss wolframite microwave dielectric ceramic and a preparation method thereof; the ceramic material has the composition expression: ZnSnxTi1-xNb2O8, wherein 0.40<=x<=0.45. The microwave dielectric ceramic material has the following advantages of high microwave quality factor (Q.f=55800 GHz-69500 GHz), adjustable dielectric constant ([epsilon]r=22.83-26.21), simple preparation process, environmental-protection process, and relatively low production cost, and is a promising dielectric adjustable microwave dielectric material.

Description

technical field [0001] The invention belongs to the technical field of electronic information materials and devices thereof, and in particular relates to a novel low-loss and low-permittivity microwave dielectric ceramic material and a preparation method thereof. Background technique [0002] Microwave dielectric ceramic (MWDC) refers to a kind of ceramic used as a dielectric material in microwave frequency circuits to complete microwave signal processing, and is a new type of electronic functional ceramic. With the rapid development of Internet technology, the information capacity is increasing exponentially, the application frequency is developing towards higher frequency bands, and portable terminals and mobile communications are further developing towards miniaturization, high integration and high stability. At the same time, dielectric resonators, filters, capacitors and other devices need to be further improved in terms of electromagnetic wave reception and transmissio...

Claims

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Application Information

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IPC IPC(8): C04B35/495C04B35/64
CPCC04B35/495C04B35/64C04B2235/3232C04B2235/3284C04B2235/3293C04B2235/656
Inventor 吴海涛刘青青毕金鑫
Owner UNIV OF JINAN