Low-temperature sintered vanadate microwave dielectric ceramic BaZnV2O7 and preparation method thereof

Abstract

The invention discloses low-temperature sintered vanadate microwave dielectric ceramic BaZnV2O7 and a preparation method thereof. The composition of the low-temperature sintered vanadate microwave dielectric ceramic material is BaZnV2O7. The preparation method comprises the following steps of: (1) weighting the original powder of BaCO3 with the purity of above 99.9%, ZnO with the purity of above 99.9% and V2O5 with the purity of above 99.9% according to the chemical formula of the BaZnV2O7, and burdening; (2) carrying out wet-type ball milling on the raw materials obtained in the step (1) and mixing for 12 hours, wherein distilled water is used as a solvent, drying and then presintering for 6 hours at 750 DEG C atmosphere; (3) adding a binging agent to the powder prepared in the step (2), pelleting, then carrying out compression molding, and finally sintering for 4 hours at 850-900 DEG C atmosphere, wherein a polyvinyl alcohol with the mass concentration of 5% is used as the binding agent, and the using amount of the binding agent accounts for 3% of the total mass of the powder. The ceramic prepared by the method has good sintering performance at 850-900 DEG C; the dielectric constant of the ceramic reaches 17-18, the quality factor QF value of the ceramic reaches up to 57000-83000GHz, and the temperature coefficient of resonance frequency of the ceramic is small; the low-temperature sintered vanadate microwave dielectric ceramic and an Ag electrode can be sintered together at low temperature, and therefore, the low-temperature sintered vanadate microwave dielectric ceramic has very great application value in industry.

Description

technical field [0001] The invention relates to a dielectric ceramic material, in particular to a microwave dielectric ceramic material for microwave components used at microwave frequencies, such as a dielectric substrate, a resonator, and a filter, and a preparation method thereof. Background technique [0002] Microwave dielectric ceramics refer to ceramics that are used as dielectric materials in microwave frequency band (mainly UHF, SHF frequency band) circuits and perform one or more functions. They are widely used as resonators, filters, and dielectric substrates in modern communications. Components such as chips and dielectric waveguide circuits are the key basic materials of modern communication technology. They have been used in portable mobile phones, car phones, cordless phones, TV satellite receivers and military radars. They are used in modern communication tools. It is playing an increasingly important role in the process of miniaturization and integration. ...

AI Technical Summary

Problems solved by technology

[0010] In the process of exploring and developing new low-firing microwave dielectric ceramic materials, material systems such as Li-based compounds, Bi-based compounds, tungstate compounds, and tellurate-based compounds with inherently low sintering temperatures have received extensive attention and research. Because the compounds containing Bi, Te and...

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