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

A microwave dielectric ceramic and high dielectric technology are applied in the field of Na-Ln-Ti-based microwave dielectric ceramics with high dielectric constant and high quality factor, which can solve the problem that the miniaturization of microwave devices cannot be fully satisfied, and achieve low price and stable performance. , the effect of high Q × f value

Inactive Publication Date: 2016-01-27
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
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  • Claims
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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 low-loss microwave dielectric ceramic material and preparation method thereof
  • High-dielectric low-loss microwave dielectric ceramic material and preparation method thereof
  • High-dielectric 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 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 x is larger than or equal to 0.01 and is smaller than or equal to 0.04, y is larger than or equal to 0.05 or is smaller than or equal to 0.12, the composition of C is VW, V represents Nb with the valence state higher than four, W represents a single ion or compound ions with the valence state lower than or equal to four and the average ion radius approximating to Ti4+, and V and M achieve simultaneous replacement or independent replacement. The invention further provides a preparation method of the high-dielectric low-loss microwave dielectric ceramic material. The preparation method comprises the steps of burdening, ball grinding, drying and sieving, presintering, pelleting, compression molding and sintering. The prepared material has the high dielectric constant and high Q*f value, contains no Pb or Cd or other volatile toxic metals in the formula, and is stable in performance and capable of meeting application requirements of modern microwave devices, raw materials are sufficiently supplied in China, the cost is relatively low, and the high-performance microwave ceramic can be low in cost.

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...

Claims

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Application Information

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