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Microwave dielectric ceramic and preparation method thereof

A technology of microwave dielectric ceramics and expressions, which is applied in the field of microwave dielectric ceramics and its preparation, can solve the problems that the sintering performance and dielectric properties cannot meet the technical requirements of communication base stations, and achieve low loss, high dielectric constant, and production process technology simple effect

Inactive Publication Date: 2013-10-16
HEFEI NORMAL UNIV
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Problems solved by technology

In the prior art, ZrTiO 4 The sintering performance and dielectric properties of ceramics cannot meet the technical requirements of communication base stations and other systems

Method used

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  • Microwave dielectric ceramic and preparation method thereof

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Embodiment Construction

[0023] The present invention will be further described below through specific embodiments and in conjunction with the accompanying drawings.

[0024] Microwave dielectric ceramics, the expression of its chemical composition is formula (I):

[0025] wxya 3 -yTiO 2 -zA (1+w) / 3 Nb (2-w) / 2 o 3 (I);

[0026] In the formula (I), the A represents one or several elements of Mg, Co, Zn, Ni and Mn; the x, y, and z all represent molar ratios, and 0.2≤x≤0.7, 0.2≤y≤ 0.6, 0.1≤z≤0.2, and x+y+z=1; the value range of w is: 0≤w≤0.5.

[0027] The preparation method of described microwave dielectric ceramics comprises the following steps:

[0028] Step 1: Choose pure ZrO 2 、TiO 2 , Nb 2 o 5 , MgO, CoO, ZnO, NiO and MnO 2 As a raw material, weigh the corresponding weight of the raw material according to the predetermined ratio;

[0029] Step 2: Put the weighed raw materials into the polyurethane tank for ball milling, and get the slurry after 4 hours of ball milling; add de...

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Abstract

The invention discloses a microwave dielectric ceramic and a preparation method thereof. The microwave dielectric ceramic is mainly composed of ZrO2, TiO2 and Nb2O5; the microwave dielectric property of the microwave dielectric ceramic can be improved by selectively adding MgO, CoO, ZnO, NiO and MnO2; the chemical constitution formula of the ceramic is xZrO3-YTiO2-zA(1+W) / 3Nb(2-w) / 2O3; in formula (I), A is one or more elements of Mg, Co, Zn, Ni and Mn; x, y and z are molar ratios, wherein x is between 0.2 and 0.7, y is between 0.2 and 0.6,, z is between 0.1 and 0.2, and, x plus y plus z is equal to 1; numerical range of w is l between 0 and 0.5. According to the microwave dielectric ceramic and the preparation method thereof, the ceramic has the characteristics that the dielectric constant is high, the loss is low, and the temperature coefficient is close to zero, and is liable to sinter; the preparation method has the characteristics that the price of raw materials is low, and a technology during production is simple.

Description

technical field [0001] The invention relates to a microwave dielectric ceramic and a preparation method thereof. Background technique [0002] With the rapid development of microwave communication technology, the requirements for high performance, miniaturization and high reliability of microwave devices are getting higher and higher, and these are directly related to the dielectric materials used in them. Traditional metal resonators have limited the development of microwave integrated circuits due to their large volume and weight. Microwave dielectric ceramics have the characteristics of high dielectric constant, low loss, small frequency temperature coefficient, etc., and can be made into dielectric resonators, duplexers, dielectric filters and other devices, and are widely used in mobile communication base stations, repeaters, radars, satellites, etc. Positioning and navigation systems and many other fields to meet the needs of high-performance indicators such as miniat...

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Application Information

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IPC IPC(8): C04B35/462C04B35/495C04B35/622
Inventor 张忠祥李大创万丽娟鲁世斌徐少兵蒋智明杜伟周舟李冲
Owner HEFEI NORMAL UNIV
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