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Dielectric niobate ceramics and preparing method thereof

A technology of dielectric ceramics and niobate, which is applied in the field of dielectric ceramic materials of ceramic capacitors or temperature compensation capacitors and its preparation, which can solve the problem of poor comprehensive performance, difficulty in meeting high frequency, high reliability, and difficulty in meeting Miniaturization needs and other issues

Inactive Publication Date: 2004-02-04
WUHAN UNIV OF TECH
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Problems solved by technology

[0008] With the accelerated development of information technology, mobile communication systems are developing in the direction of high frequency, miniaturization, integration, and high reliability. The dielectric constant of the medium dielectric constant material system is low, and it is very easy to maintain the Q value without reducing the dielectric constant. It is difficult to meet the needs of further miniaturization
The high dielectric constant is mainly due to poor overall performance and small Qf value, which makes it difficult to meet the development needs of high frequency and high reliability.

Method used

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  • Dielectric niobate ceramics and preparing method thereof

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Embodiment Construction

[0019] Further illustrate the composition and performance of the dielectric ceramic material of the present invention by the following examples

[0020] Table 1 shows several specific examples of the content of each component constituting the present invention and their microwave dielectric properties. Its preparation method is as described above, and the performance test is to use the powder X-ray diffraction method to carry out the phase analysis of the ceramic sample after sintering, figure 1 For the X-ray diffraction pattern of Example 3, the evaluation of the microwave dielectric properties was carried out by the cylindrical dielectric resonator method.

[0021] It can be seen from Table 1 that the high dielectric constant dielectric material provided by the present invention has a dielectric constant of 50-90, and has low loss and a small temperature coefficient of resonance frequency. The dielectric material with higher dielectric constant provided by the invention can...

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Abstract

A dielectric niobate ceramics used for microwave element and capacitor has the primary phase (Ba1-ySry)8-x(LasNdtBiu)xTi3+xNb4-xO24, where x=0-3, y=0-1 and s+t+u=1. Its preparing process is also disclosed. Its advantages are high HF dielectric constant up to 50-90, low loss, and small temp coefficient of resonance frequency.

Description

technical field [0001] The invention relates to a dielectric ceramic material, in particular to a dielectric resonator, a filter and other microwave components used at microwave frequencies, as well as the dielectric ceramic material of a ceramic capacitor or a temperature compensation capacitor and a preparation method thereof. Background technique [0002] Microwave dielectric ceramics refer to ceramics that are used as dielectric materials in microwave frequency band (mainly UHF, SHF frequency band) circuits and perform one or more functions. They are widely used as resonators, filters, and dielectric substrates in modern communications. Chips, dielectric waveguide circuits and other components are the key basic materials of modern communication technology. They have been used in portable mobile phones, car phones, cordless phones, TV satellite receivers, military radars, etc. It is playing an increasingly important role in the process of miniaturization and integration. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/495C04B35/622H01B3/12
Inventor 方亮张辉杨俊峰洪学鹍孟范成黄涛华袁润章刘韩星
Owner WUHAN UNIV OF TECH