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High-dielectric and low-loss microwave dielectric ceramic material and preparation method thereof

A microwave dielectric ceramic and high-dielectric technology, which is applied in the field of Na-Ln-Ti-based microwave dielectric ceramics with high dielectric constant and high quality factor, can solve the problems that cannot fully meet the miniaturization of microwave devices, and achieve low price and stable performance , the effect of sufficient supply

Inactive Publication Date: 2018-05-15
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the dielectric constants of the above-mentioned Ba-Nd-Ti ceramics are far less than 100, which makes them unable to fully meet the needs of miniaturization of microwave devices.

Method used

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  • High-dielectric and low-loss microwave dielectric ceramic material and preparation method thereof
  • High-dielectric and low-loss microwave dielectric ceramic material and preparation method thereof
  • High-dielectric and low-loss microwave dielectric ceramic material and preparation method thereof

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Embodiment

[0035] A high dielectric and low loss microwave dielectric ceramic material microwave dielectric ceramic material substituted by a B position, the general chemical formula is (Na 0.5+y ln 0.5 )(Ti 1-x C x )O 3 , Ln=La or Nd or Sm, wherein 0.01≤x≤0.04, 0.05≤y≤0.12, the Na component content is a non-stoichiometric ratio, adjust the x, y value to control the microwave performance of the system; the composition of C is VW, V Represents Nb whose valence is higher than tetravalent, W represents valence lower than or equal to tetravalent and the average ionic radius is close to Ti 4+ A single ion or compound ion, V and M are substituted simultaneously or individually. When substituted alone, W is one or more of Al, Cr, Ni, Zn. When V and W are substituted at the same time, if W is one or more of Al and Cr, the molar ratio V:W=1:1; if W is one or more of Zn and Ni, the molar ratio V:W=2:1.

[0036] The crystal phase of the microwave dielectric ceramic material is an orthorhombi...

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Abstract

The invention provides a high dielectric and low loss microwave dielectric ceramic material, the general chemical formula of the material is (Na0.5+yLn0.5)(Ti1‑xCx)O3, Ln=La or Nd or Sm, wherein 0.01≤x≤0.04, 0.05≤y≤0.12, the composition of C is VW, V represents Nb whose valence is higher than tetravalent, W represents a single ion or compound ion whose valence is lower than or equal to tetravalent and the average ionic radius is close to Ti4+, V and M Simultaneous replacement or replacement alone; the present invention also provides a preparation method of a high-intermediate and low-loss microwave dielectric ceramic material, including steps: batching, ball milling, drying and sieving, pre-sintering, granulation, molding, and sintering; The obtained material has a high dielectric constant and a high Q×f value. The formula does not contain Pb, Cd and other volatile toxic metals. It has stable performance and can meet the application requirements of modern microwave devices. The raw materials are in sufficient supply in China and the price is relatively low. It makes it possible to lower the cost of high-performance microwave ceramics.

Description

technical field [0001] The invention belongs to the technical field of electronic information functional materials and devices, and specifically relates to a Na-Ln-Ti (Ln=La, Nd, Sm)-based microwave dielectric ceramic with high dielectric constant and high quality factor, which can be used to make modern mobile phones. Microwave components such as dielectric resonators, dielectric filters, dielectric substrates, and dielectric antennas in communication and Internet of Things technologies. Background technique [0002] At present, information technology is developing rapidly in the direction of high frequency, high power, integration, and multi-function, and with the rapid development of modern mobile communication technology and Internet of Things technology, high-frequency microwave There are extensive and important applications in systems such as sensing Internet of Things radio frequency technology. Among them, radio frequency identification technology (radio frequency i...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/462C04B35/50
Inventor 唐斌方梓烜袁颖孙成礼钟朝位张树人
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA