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High dielectric constant microwave dielectric ceramic with adjustable dielectric constant and preparation method thereof

A technology of microwave dielectric ceramic and dielectric constant is applied in the field of CaTiO3-TiO3 composite microwave dielectric material and its preparation, which can solve the problems such as the inability of the device to work with high stability and the drift of the center frequency of the device, so as to reduce production costs, save energy, and reduce production costs simple craftsmanship

Inactive Publication Date: 2016-05-25
JIANGSU JIANGJIA ELECTRONICS +1
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AI Technical Summary

Problems solved by technology

If τf is large, it indicates that the center frequency of the device will have a large drift due to temperature changes, and the device will not be able to work stably

Method used

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Comparison scheme
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Embodiment Construction

[0014] The present invention selects pre-burning synthesis (Li 0.5 SM 0.5 )TiO 3 and CaTiO 3 After that, by adjusting (Li 0.5 SM 0.5 )TiO 3 and CaTiO 3 Add proportion to adjust the dielectric constant Er: 90~Er: 130, and at the same time add a small amount of CeO to adjust the temperature coefficient τf, provide a dielectric constant of 112.5, the dielectric constant and frequency temperature coefficient τf can be adjusted, and the material preparation process is simple and easy to use. There are no special requirements for equipment and workshop environment, which is convenient for mass production and application promotion.

[0015] A high dielectric constant microwave dielectric ceramic technical scheme is based on (Li 0.5 SM 0.5 )TiO 3 , CaTiO 3 As the main component, CeO is added in a small amount, and the amount of CeO is added to adjust the temperature coefficient τf of microwave dielectric ceramics 0

[0016] A kind of microwave dielectric ceramic with adjus...

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Abstract

The invention relates to high dielectric constant microwave dielectric ceramic with an adjustable dielectric constant and a preparation method thereof. The ceramic comprises: xCaTiO3.y(Li0.5Sm0.5)TiO3+awt%CeO, wherein 0.3< / =x< / =0.5, 0.5<=y<=0.7, and 0.1< / =a< / =0.5, wherein x and y are added as molar ratios and a is added as mass percent. The invention provides a microwave dielectric ceramic formulation having a dielectric constant 112.5 that is adjustable in a certain range (Er: 90-ER: 130) and a preparation method thereof, CaTiO3-(Li0.5Sm0.5)TiO3 system is used as an object of study, CeO is used as an adjusting microwave dielectric ceramic temperature coefficient to comprehensively adjust microwave dielectric performance of material.

Description

technical field [0001] The invention belongs to an ultra-high dielectric constant microwave dielectric ceramic with adjustable dielectric constant and a preparation method thereof, and is a CaTiO 3 -(Li 0.5 SM 0.5 )TiO 3 Composite microwave dielectric material and its preparation method. Widely used in mobile phones, car phones, TV satellite receivers, global satellite positioning systems, wireless local area access and various radar systems. Background technique [0002] As a new type of electronic material, microwave dielectric ceramics are used as resonators, filters, dielectric substrates, dielectric antennas, dielectric waveguide circuits, etc. in modern communications, and are widely used in many fields of microwave technology. It can be used in mobile communication, satellite communication and military radar. With the rapid development of science and technology, the rapid increase in the amount of communication information, and people's requirements for wireless ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/462C04B35/622C04B35/626
CPCC04B35/462C04B35/622C04B35/626C04B2235/3203C04B2235/3208C04B2235/3224C04B2235/3229
Inventor 严盛喜张益勇李永祥潘锦刘志甫
Owner JIANGSU JIANGJIA ELECTRONICS
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