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Microwave medium ceramic material and preparing method thereof

A technology of microwave dielectric ceramics and mass ratio, applied in the field of microwave dielectric ceramic materials and their preparation, can solve the problems of large mass and volume, limit the development of microwave integrated circuits, reduce the size of devices, etc., and achieve the effect of simple preparation process

Inactive Publication Date: 2013-06-19
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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Problems solved by technology

[0004] Due to the relatively large mass and volume of existing microwave dielectric resonators, the development of microwave integrated circuits is greatly limited.
The existing microwave dielectric ceramic materials have a high dielectric constant and a low quality factor Q value, which can no longer meet the requirements of device miniaturization, and microwave tubes, pipe strip lines, etc. made of microwave dielectric ceramic materials with an ultra-high dielectric constant The microwave hybrid integrated circuit can greatly reduce the size of the device, which makes the microwave dielectric ceramic material with a medium dielectric constant and an ultra-high Q value the basis and key material for realizing the microwave control function.

Method used

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Embodiment

[0029] a) According to the main crystal phase structure formula: Zr x (Zn y Nb 1-y ) 1-x TiO 4 (wherein the value of x and y is shown in Table 1) the stoichiometric ratio takes by weighing zirconia, zinc oxide, niobium oxide and titanium oxide;

[0030] b) using deionized water as the ball milling medium, using zirconia balls as the grinding balls, the mass ratio of ball:material:water is 1.5:1:1, and ball milling for 20-28 hours to make the mixture uniform;

[0031] c) discharging and drying at 100-200°C;

[0032] d) Pre-burning at 1050-1150°C for 3-5 hours;

[0033] E) Pulverize, add modification additive (as shown in Table 1 specifically);

[0034] f) Using deionized water as the ball milling medium, using zirconia balls as the grinding balls, the mass ratio of ball: material: water is 1.5: 1: 1, and ball milling for 10 to 16 hours to make the mixture uniform;

[0035] g) discharging, drying at 100-200°C, passing through a 200-mesh sieve, adding 3-8 wt% polyvinyl alc...

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Abstract

The invention provides a microwave medium ceramic material and a preparing method thereof. The microwave medium ceramic material is composed of principal crystalline phases and property-modifying additives, wherein the structural formula of the principal crystalline phases is Zrx(ZnyNb1-y) 1-xTiO4, 0.2<=x<=0.7, 1 / 3<=y<=2 / 3, and the property-modifying additives are mixture of any one or more than two of MnO2, CeO2 and Ga2O3. The preparing method of the material includes the following steps of burdening, ball-milling, presintering, property-modifying additive adding and ball-milling, prilling, compression moulding, and sintering. The microwave medium ceramic material is low in sintering temperature, and good in microwave dielectricity, has the middle dielectric constant, the high Q and the adjustable frequency temperature factor, can meet development requirements of microwave device miniaturization and high frequency, and can be used for manufacturing medium resonators, filters, oscillators and other microwave devices in communication systems.

Description

technical field [0001] The invention relates to a microwave dielectric ceramic material and a preparation method thereof, in particular to a microwave dielectric ceramic with a medium dielectric constant and an ultra-high Q value used for manufacturing microwave components such as dielectric resonators, filters, and oscillators in communication systems Materials and their preparation methods. Background technique [0002] Microwave dielectric ceramics is a new trend in international research on dielectric materials in recent years, which is mainly to meet the development needs of microwave mobile communications. In the late 20th century, the combination of information processing technology and electronic information digitization technology pushed the communication system to an unprecedented new peak. The ultimate goal of communication is to achieve full-time information transmission and exchange, so that the high mobility of communication machines has become an inevitable t...

Claims

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Application Information

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IPC IPC(8): C04B35/462C04B35/622
Inventor 何飞林慧兴姜少虎陈玮罗澜
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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