Ultrahigh dielectric constant low-loss high frequency medium ceramic and preparing method thereof

Abstract

The invention discloses ultra-high permittivity, low-loss and high-frequency dielectric ceramics and a process for preparation thereof. The process employs Nb2O5 of 28%-53% and Ta2O5 of 5%-31% as starting materials, and prepares (Nb1-xTax) 2O5 by employing the method of synthesizing precursors previously, wherein x is equal to 0-0.4. Then Ag2O of 39%-46% is added in the precursors, Ag(Nb1-xTax)O3is produced by high-temperature calcining and reacting, wherein x=0-0.4, further addition agent of Bi2O3 of 4.2%-7.0% is added to prepare the dielectric ceramics. The sintering temperature of the ceramic material of the invention is comparatively low (1060-1130DEG C), and the invention has the advantages of comparatively high dielectric constant (Epsilon>700), comparatively low dielectric loss (tan Delta <10*10 -4), comparatively high electrical resistivity (>10 12Omega,cm), simple preparing process and pollution-free procedure.

Description

technical field The invention belongs to the field of electronic information materials and components, and relates to a dielectric ceramic material and a preparation method thereof, more precisely, to an ultra-high dielectric, low-loss dielectric ceramic material and a preparation method thereof. Background technique The rapid development of the communication industry and the continuous popularization of mobile communications have made the development of electronic materials face severe challenges, requiring electronic devices to develop in the direction of high performance, high stability, and miniaturization. High-frequency dielectric components are one of the key components that affect communication quality, and high-frequency dielectric ceramics are key materials for preparing high-frequency dielectric devices. From the expression of the resonant frequency: It can be seen that when the resonant frequency is constant, the size of the device is inversely proportional to th...

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Problems solved by technology

Li Lingxia et al. provided a kind of Ag(Nb 1-x Ta x )O 3 and MnO 2 (Patent application patent number: 200510016200.7) prepared high-frequency dielectric ceramics, but its dielectric constant is only about 450, which is far from meeting the needs of technological development. How to manufacture high-frequency dielectrics with higher dielectric constants has become a The world's cutting-edge topics

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