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Low-sintering-temperature and low-dielectric-constant microwave dielectric ceramic and preparation method thereof

A technology of microwave dielectric ceramics and low sintering temperature, which is applied in the field of electronic ceramics and its preparation, can solve the problems of high sintering temperature and difficulty in sintering into porcelain, and achieve the effects of reducing sintering temperature, improving sinterability and low loss

Active Publication Date: 2019-12-06
无锡鑫圣慧龙纳米陶瓷技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Al 2 o 3 Excellent performance and good chemical stability, but its sintering temperature is high, it is difficult to sinter into porcelain

Method used

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  • Low-sintering-temperature and low-dielectric-constant microwave dielectric ceramic and preparation method thereof

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preparation example Construction

[0025] The present invention also provides a method for preparing low-sintering temperature and low-medium microwave dielectric ceramics, comprising the following steps:

[0026] Step 1, prepare the main material of this microwave dielectric ceramic: first MgO, SiO 2 、TiO 2 , SrCO 3 According to the composition expression (1-x-y)MgSiO 3 -xMg 2 TiO 4 -ySrSiTiO 5 The molar ratio of the corresponding elements in the ingredients, the MgO, SiO 2 、TiO 2 , SrCO 3 Fully ball mill after mixing, dry and sieve after ball milling, and then put into a corundum crucible for roasting to obtain the main material, the composition expression (1-x-y)MgSiO 3 -xMg 2 TiO 4 -ySrSiTiO 5 Among them, x, y, (1-x-y) all represent the molar ratio, x=0.3, 0<y≤0.035;

[0027] Step 2, preparing auxiliary materials for the microwave dielectric ceramic: mixing ZnO and CuO fully, then ball milling, drying, sieving after ball milling, and then putting them into a corundum crucible for roasting to obt...

Embodiment 1

[0036] The preparation method of the low sintering temperature and low dielectric microwave dielectric ceramic of the present embodiment 1 comprises the following steps:

[0037] (1) prepare the main material of this microwave dielectric ceramic: first MgO, SiO 2 、TiO 2 , SrCO 3 According to the composition expression 0.695MgSiO 3 -0.3Mg 2 TiO 4 -0.005SrSiTiO 5 The molar ratio of the corresponding elements in the ingredients, the MgO, SiO 2 、TiO 2 , SrCO 3 After mixing, fully ball mill, dry and sieve after ball milling, then put into a corundum crucible, and roast at 1000°C for 4 hours to obtain the main material;

[0038] (2) Preparation of low sintering temperature and low-medium microwave dielectric ceramics: Weigh the main material without adding auxiliary materials, mix the main materials and fully ball mill, then dry, granulate and sieve, and press the sieved mixed powder Form a cylinder with a diameter of 10 mm and a height of 6 mm, and sinter at 1250° C. for 4 h...

Embodiment 2

[0041] The preparation method of the low sintering temperature and low dielectric microwave dielectric ceramic of the present embodiment 2 comprises the following steps:

[0042] (1) prepare the main material of this microwave dielectric ceramic: first MgO, SiO 2 、TiO 2 , SrCO 3 According to the composition expression 0.69MgSiO 3 -0.3Mg 2 TiO 4 -0.01SrSiTiO 5 The molar ratio of the corresponding elements in the ingredients, the MgO, SiO 2 、TiO 2 , SrCO 3 After mixing, fully ball mill, dry and sieve after ball milling, then put into a corundum crucible, and roast at 1000°C for 4 hours to obtain the main material;

[0043] (2) Preparation of low sintering temperature and low-medium microwave dielectric ceramics: Weigh the main material without adding auxiliary materials, mix the main materials and fully ball mill, then dry, granulate and sieve, and press the sieved mixed powder Form a cylinder with a diameter of 10 mm and a height of 6 mm, and sinter at 1250° C. for 4 h...

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Abstract

The invention discloses low-sintering-temperature and low-dielectric-constant microwave dielectric ceramic. The microwave dielectric ceramic is prepared by compounding a main material and an auxiliarymaterial, wherein a composition expression of the main material is (1-x-y)MgSiO<3>-xMg<2>TiO<4>-ySrSiTiO<5>, x, y and (1-x-y) all represent a molar ratio, x=0.3, 0<y<=0.035, the auxiliary material isCuO-ZnO, a mass fraction of the main material is a, a mass fraction of the auxiliary material is b, 0<=b<=1%, and a+b=1. The invention also discloses a preparation method of the low-sintering-temperature and low-dielectric-constant microwave dielectric ceramic. The microwave dielectric ceramic has low dielectric constant, wide application range, low loss, and relatively low sintering temperature.

Description

technical field [0001] The invention belongs to the technical field of electronic ceramics and its preparation, and in particular relates to a low sintering temperature and low dielectric microwave dielectric ceramic and a preparation method thereof. Background technique [0002] As a new type of electronic material, microwave dielectric ceramics are used as resonators, filters, dielectric substrates, dielectric antennas, dielectric waveguide circuits, etc. in modern communications, and are widely used in many fields of microwave technology, such as mobile communications, satellites Communication and military radar, etc. With the rapid development of science and technology, the rapid increase in the amount of communication information, and people's requirements for wireless communication, the use of microwave communication systems such as satellite communication and satellite live TV has become an inevitable trend in the development of current communication technology, which...

Claims

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Application Information

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IPC IPC(8): C04B35/20C04B35/622C04B35/64
CPCC04B35/20C04B35/622C04B35/64C04B2235/3206C04B2235/3213C04B2235/3234C04B2235/3236
Inventor 王丹吉岸王晓慧
Owner 无锡鑫圣慧龙纳米陶瓷技术有限公司