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Method for preparing low-loss wolframite-structure microwave dielectric ceramic by means of reaction sintering technology

A microwave dielectric ceramic and wolframite technology, which is applied in the field of electronic information materials and components, can solve the problems of prolonged preparation time, complicated preparation experiment process, increased preparation cost, etc. The effect of firing and secondary ball milling

Inactive Publication Date: 2016-07-20
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of wolframite structure microwave dielectric ceramics in the above studies all adopts the traditional sintering process. The preparation experiment process of this method is complicated, and the multiple pre-firing and mixing processes prolong the preparation time and increase the preparation cost.

Method used

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  • Method for preparing low-loss wolframite-structure microwave dielectric ceramic by means of reaction sintering technology
  • Method for preparing low-loss wolframite-structure microwave dielectric ceramic by means of reaction sintering technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Mixing: according to CoZrNb 2 o 8 For the stoichiometric ratio of the microwave dielectric ceramic phase, 3.2303g of cobalt oxide (CoO) and zirconia (ZrO) with a purity of 99.99% were weighed using a precision balance. 2 ) 5.3122g, and niobium pentoxide (Nb 2 o 5 ) 11.4595g. Pour the weighed powder into a 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 200r / min; the mixed slurry and the balls are separated by a coarse screen, and the separated slurry is dried in a drying oven at 70-90°C.

[0020] (2) Drying and sieving: put the mixed raw material slurry in a drying oven at 70-90°C for drying, and pass through an 80-mesh sieve after drying to obtain ceramic powde...

Embodiment 2

[0025] (1) Mixing: according to NiZrNb 2 o 8 For the stoichiometric ratio of the microwave dielectric ceramic phase, use a precision balance to weigh 3.2224g of nickel oxide (NiO) with a purity of 99.99%, zirconia (ZrO) 2 ) 5.3147g, and niobium pentoxide (Nb 2 o 5 ) 11.4649g. Pour the weighed powder into a 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 200r / min; the mixed slurry and the balls are separated by a coarse screen, and the separated slurry is dried in a drying oven at 70-90°C.

[0026] (2) Drying and sieving: put the mixed raw material slurry in a drying oven at 70-90°C for drying, and pass through an 80-mesh sieve after drying to obtain ceramic powder with uni...

Embodiment 3

[0031] (1) Mixing: according to MgZrNb 2 o 8 For the stoichiometric ratio of microwave dielectric ceramic phases, 1.8777g of magnesium oxide (MgO) and zirconia (ZrO) with a purity of 99.99% were weighed using a precision balance. 2 ) 5.7406g, and niobium pentoxide (Nb 2 o 5 ) 12.3837g. Pour the weighed powder into a 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 200r / min; the mixed slurry and the balls are separated by a coarse screen, and the separated slurry is dried in a drying oven at 70-90°C.

[0032](2) Drying and sieving: put the mixed raw material slurry in a drying oven for drying at 70-90°C, and pass through an 80-mesh sieve after drying to obtain ceramic powder...

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Abstract

The invention discloses a method for preparing low-loss wolframite-structure microwave dielectric ceramic by means of a reaction sintering technology.The chemical composition expression of the ceramic is AZrNb2O8, wherein A represents Mg, Co, Ni and Mn.When the ceramic is prepared, the raw materials such as ZrO2, MgO, CoO, NiO, MnO and Nb2O5 are blended according to the chemical formula, the technologies of material mixing, drying, sieving, granulating, compression molding and the like are conducted, sintering is conducted at 1,250 DEG C-1,300 DEG C by means of the reaction sintering technology, and the AZrNb2O8 ceramic is obtained.According to the method for preparing the low-loss wolframite-structure microwave dielectric ceramic by means of the reaction sintering technology, the technological processes of presintering and secondary material mixing are omitted, the preparation time is greatly reduced, the preparation cost is reduced, the reaction sintering process technology is simple, the obtained ceramic is excellent in microwave dielectric property, the process is environmentally friendly, and the ceramic has a great application value in industry.

Description

technical field [0001] The invention belongs to the field of electronic information materials and components, and relates to a method for preparing low-loss wolframite structure microwave dielectric ceramics by using a reaction sintering process. 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 transmission, energy and sig...

Claims

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Application Information

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IPC IPC(8): C04B35/495C04B35/64
CPCC04B35/495C04B35/64C04B2235/3206C04B2235/3244C04B2235/3251C04B2235/3275C04B2235/3279C04B2235/65
Inventor 吴海涛毕金鑫杨长红
Owner UNIV OF JINAN
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