New method for finely preparing ixiolite structure MgTiNb2O8 microwave dielectric ceramic by using chemical process

Abstract

The invention belongs to the technical field of electronic ceramic preparation and application, and particularly relates to a method for fine synthesis of a ternary MgO-Nb2O5-TiO2 system microwave dielectric ceramic by using a sol-gel method. The technical scheme comprises adopting a sol-gel method to finely synthesize a ternary MgO-Nb2O5-TiO2 system microwave dielectric ceramic, and specifically comprises: 1) preparing a citric acid aqueous solution of Mg ions; 2) preparing a citric acid aqueous solution of Ti ions and Nb ions; and 3) synthesizing a ternary MgTiNb2O8 microwave dielectric ceramic nanometer precursor, and preparing the ceramic. The ternary MgO-Nb2O5-TiO2 system microwave dielectric ceramic has significant advantages of low synthesis temperature, uniform ceramic particles, good ceramic particle dispersity, pure phase, nano-scale powder (particle size of about 50 nm), high specific surface energy, high activity and the like. In addition, compared with the conventional solid-phase method, the method of the present invention has the following characteristics that: the sintering temperature can be significantly reduced by 100-200 DEG C so as to achieve low temperature sintering, maintain the good microwave dielectric property, and meet the LTCC application requirements.

Description

technical field [0001] The invention belongs to the technical field of preparation and application of electronic ceramics, in particular to a finely synthesized ternary manganese-tantalum ore structure MgTiNb by wet chemical technology 2 o 8 Microwave dielectric ceramic method. Background technique [0002] LTCC low-temperature co-fired ceramic technology is a new material technology developed by Hughes Corporation in 1982. It uses thick film materials, and according to the pre-designed structure, electrode materials, substrates, electronic devices, etc. are fired at one time. High-integration, high-performance circuit packaging technology, its main application areas are: high-frequency wireless communication (such as mobile phones, global satellite positioning systems and Bluetooth technology, etc.), aerospace industry and military fields (such as communication satellites, detection and tracking radar systems, etc.), micro-electromechanical systems and sensing technology,...

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Problems solved by technology

[0004] The purpose of this invention is to overcome the high temperature of traditional solid-phase synthesis powder, The size of the synthetic powder is large, which is not conducive to the subsequent sintering of ceramics; it provides a fine synthesis of ternary MgO-Nb2O5-TiO by sol-gel method The 2 system microwave dielectric ceramic method uses the sol-gel method to finely synthesize MgTiNb2O8 ceramic powder with a synthesis temperature Low, uniform ceramic particles (about 50nm), good dispersion, pure phase, powder with nano-particle size and high specific surface energy, showing significant advantages such as high activity, can achieve low-temperature sintering, and maintain its good microwave dielectric properties Electrical performance to meet LTCC application requirements

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