Microwave dielectric ceramics and preparation method thereof

A technology of microwave dielectric ceramics and high quality, applied in the field of ceramic materials, can solve the problems of restricting development and utilization, increasing industrial production costs, etc., and achieve the effect of raw material acquisition, easy raw material and stable performance

Inactive Publication Date: 2013-07-24
WUHAN HONGXIN TELECOMM TECH CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0005] In order to ensure the reliability and stability of microwave dielectric ceramics in industrial production, domestic manufacturers will choose to purchase synthesized xCaTiO from Japanese, Korean, European and American manufacturers. 3 -(1-x)LaAlO 3 The system microwave dielectric ceramic powder greatly increases the cost of industrial production and limits the development and utilization of microwave dielectric devices in the field of mobile communications.

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  • Microwave dielectric ceramics and preparation method thereof
  • Microwave dielectric ceramics and preparation method thereof
  • Microwave dielectric ceramics and preparation method thereof

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Embodiment 1

[0033] Embodiment 1-5 according to general formula (1-x) CaTiO 3 -x(La y Nd (1-y) )GaO 3 The microwave dielectric ceramics of this patent are prepared through the following steps:

[0034] The specific raw material manufacturers are as follows:

[0035]

[0036]1) Weigh CaCO according to the main crystal phase ratio in Table 1 3 ,TiO 2 , La 2 o 3 , Ga 2 o 3 ,Nd 2 o 3 , after mixing, ball mill on a planetary ball mill for 6 hours with deionized water and zirconium balls;

[0037] 2) After drying, heat it at 1400°C for 6 hours, and pre-calcine to prepare (1-x)CaTiO 3 -x(La y Nd (1-y) )GaO 3 (0.3≤x≤0.5, 0.3≤y≤0.6) powder;

[0038] 3) Take BaCO according to the doping content 3 and SrCO 3 , mixed with the pre-fired powder, and then added deionized water and zirconium balls according to the mass ratio of material: deionized water: zirconium balls = 1:1.2:5, and ball milled on a planetary ball mill for 6 hours;

[0039] 4) Dry the ball-milled slurry and pass i...

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Abstract

The invention discloses a high-performance microwave dielectric ceramics and a preparation method thereof. The principal crystalline phase is (1-x)CaTiO3-x(LayNd(1-y))GaO3, CaCO3, TiO2, La2O3, Ga2O3 and Nd2O3 are taken as raw materials, and the modified doping agent comprises BaCO3 and SrCO3. The (1-x)CaTiO3-x(LayNd(1-y))GaO3 microwave dielectric ceramics is prepared according to the traditional solid-phase reaction method. The provided microwave dielectric ceramic material has excellent microwave dielectric performance, the relative dielectric constant epsilon r is adjustable between 40 and 45, Q*f is 40000-45000GHz, the resonant frequency temperature coefficient can be continuously adjusted, and the microwave dielectric ceramics can be widely applied to preparing dielectric resonators, filters, duplexers and other microwave devices in the modern communication base station.

Description

[0001] technical field [0002] The invention relates to a microwave dielectric ceramic applied to microwave devices and a preparation method thereof, belonging to the field of ceramic materials. Background technique [0003] In recent years, modern communication industries such as mobile communication, satellite communication, global satellite positioning system (GPS), Bluetooth technology and wireless local area network (WLAN) have developed rapidly. Microwave dielectric ceramics have the advantages of low microwave loss, high dielectric constant, and small temperature coefficient of frequency. The requirements of high performance and high reliability work characteristics have received more extensive attention. [0004] The basic performance requirements of medium dielectric constant microwave dielectric ceramics used in microwave systems are: dielectric constant ε r =30~50, resonant frequency temperature coefficient τ f =0±10ppm / ℃, Q×f≥30000GHz. Due to CaTiO 3 Materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/50C04B35/622
Inventor 刘林万丰王志勇吴卫华
Owner WUHAN HONGXIN TELECOMM TECH CO LTD
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