A kind of zhts microwave dielectric ceramic and preparation method thereof

A technology of microwave dielectric ceramics and ceramics, applied in the field of microwave dielectric ceramics, can solve the problems of high raw material cost, low ceramic strength, and difficult production, and achieve the effects of low sintering temperature, large Qf value, and low cost

Active Publication Date: 2022-01-04
GUANGDONG GOVA ADVANCED MATERIAL TECH
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Problems solved by technology

[0003] At present, Ba[(Zn,Co) 1 / 3 Nb 2 / 3 ]O 3 The cost of raw materials of the system is high and the production is difficult. BaTi 4 o 9 – BaZn 2 Ti 4 o 11 System ceramics have low strength, SrTiO 3 – LaAlO 3 The sintering temperature of the system is high and the ceramic strength is not high, CaTiO 3 – LaAlO 3 Large system loss

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  • A kind of zhts microwave dielectric ceramic and preparation method thereof

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[0046] The present invention also provides a method for preparing the ZHTS microwave dielectric ceramic described in the above technical solution, comprising the following steps:

[0047] a) ZrO 2 , HfO 2 、TiO 2 and SnO 2 After mixing, the first grinding treatment is carried out, and then pre-sintering is carried out to obtain pre-sintered material; then the obtained pre-sintered material is subjected to second grinding treatment to obtain powder;

[0048] b) adding a binder to the powder obtained in step a) for granulation and molding to obtain a ceramic green body; and then sintering the obtained ceramic green body to obtain ZHTS microwave dielectric ceramics.

[0049] The present invention first ZrO 2 , HfO 2 、TiO 2 and SnO 2 After mixing, the first grinding treatment is carried out, and then pre-sintering is carried out to obtain pre-sintered material; then the obtained pre-sintered material is subjected to second grinding treatment to obtain powder. The present in...

Embodiment 1

[0079] (1) Take by weighing 71.762g ZrO according to x=0.68, y=0, z=0.32 2 , 136.964g TiO 2 and 41.274gSnO 2 ; The above raw materials, zirconium balls, and deionized water are wet-milled with a planetary mill for 4 hours at a mass ratio of 1:3:2, dried at 120°C, and pre-fired at 1050°C (in the atmosphere) for 3 hours , the heating rate was 3°C / min, and then cooled with the furnace to obtain the calcined material; the calcined material, zirconium balls, and deionized water were milled with a planetary mill for 4 hours in a mass ratio of 1:3:2, and the After drying at 120°C, microwave dielectric ceramic powder is obtained.

[0080] (2) In the microwave dielectric ceramic powder that step (1) obtains, add the binder of powder material quality 20%, granulate and grind 1h, cross 80 mesh sieves, then the powder that obtains is pressed (pressure is 100MPa) into A thin cylindrical green body with a thickness of 6mm and a diameter of 13mm is finally sintered into porcelain at 1400°...

Embodiment 2

[0086] (1) Take by weighing 69.866g ZrO according to x=0.665, y=0.015, z=0.32 2 , 2.692g HfO 2 , 136.353gTiO 2 and 41.09 g SnO 2 ; The above raw materials, zirconium balls, and deionized water are wet-milled with a planetary mill for 4 hours at a mass ratio of 1:3:2, dried at 120°C, and pre-fired at 1050°C (in the atmosphere) for 3 hours , the heating rate was 3°C / min, and then cooled with the furnace to obtain the calcined material; the calcined material, zirconium balls, and deionized water were milled with a planetary mill for 4 hours in a mass ratio of 1:3:2, and the After drying at 120°C, microwave dielectric ceramic powder is obtained.

[0087] (2) In the microwave dielectric ceramic powder that step (1) obtains, add the binder of powder material quality 20%, granulate and grind 1h, cross 80 mesh sieves, then the powder that obtains is pressed (pressure is 100MPa) into A thin cylindrical green body with a thickness of 6mm and a diameter of 13mm is finally sintered in...

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Abstract

The invention provides a ZHTS microwave dielectric ceramic and a preparation method thereof. The ZHTS microwave dielectric ceramic has a general formula shown in formula (I): Zr x f y Ti 2 sn z o 8+2x+2y+2z ; wherein, 0≤y≤0.03, 0≤z≤0.5, x+y+z=1. Compared with the prior art, the ZHTS microwave dielectric ceramic provided by the present invention uses the compound oxide of the above-mentioned specific general formula as the main material, and by adjusting the content of Zr, Hf, and Sn, the dielectric constant can be around 40, and the temperature coefficient of frequency can be achieved. It is continuously adjustable; moreover, Hf partly replaces Zr to activate the lattice structure to increase the Qf value; the ZHTS microwave dielectric ceramic structure is stable, has a specific dielectric constant and a high Qf value, and the temperature coefficient of the resonant frequency is continuously adjustable. Experimental results show that the dielectric constant of ZHTS microwave dielectric ceramics provided by the present invention is between 38 and 43, Qf > 51500 GHz, and can be as high as 68600 GHz. Compared with other microwave dielectric ceramics with the same dielectric constant, the Qf value of this system is larger , low dielectric loss; at the same time, the resonant frequency temperature coefficient is continuously adjustable between -10.9ppm / ℃~+23ppm / ℃.

Description

technical field [0001] The invention relates to the technical field of microwave dielectric ceramics, and more specifically relates to a ZHTS microwave dielectric ceramic and a preparation method thereof. Background technique [0002] Mobile communication technology will enter the development stage of the fifth generation mobile communication (5G). 5G must meet people's needs for ultra-high traffic density, ultra-high connection density, and ultra-high mobility. It can provide users with high-definition video, virtual reality, Augmented reality, cloud desktop, online games and other extreme business experiences. 5G will be deeply integrated with industrial facilities, medical instruments, and vehicles to fully realize the "Internet of Everything". This will bring about a thousand-fold increase in data traffic, hundreds of billions of device connections, and diversified business requirements. It will pose severe challenges to 5G system design, and spectral efficiency must be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/462C04B35/622C04B35/626
Inventor 殷旺吕开明吴悦广马才兵
Owner GUANGDONG GOVA ADVANCED MATERIAL TECH
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