Low-temperature sinterable microwave dielectric ceramic SrCuV2O7 and preparation method thereof

Abstract

The invention discloses a low-temperature sinterable microwave dielectric ceramic SrCuV2O7 and a preparation method thereof. The chemical composition of the low-temperature sinterable microwave dielectric ceramic is SrCuV2O7. The preparation method comprises the following steps: (1) weighing and proportioning SrCO3, CuO and V2O5 original powder with the purity of higher than 99.9% according to the chemical formula SrCuV2O7; (2) carrying out wet-type ball milling mixing on the raw materials in the step (1) for 12 hours by using distilled water as a solvent, drying, and presintering at 600 DEG C in air for 6 hours; and (3) adding an adhesive into the powder prepared in the step (2), granulating, carrying out compression molding, and finally, sintering at 810-840 DEG C in air for 4 hours, wherein the adhesive is a 5 wt% polyvinyl alcohol solution, and accounts for 3 wt% of the powder. The ceramic disclosed by the invention can be well sintered at 810-840 DEG C; the dielectric constant is up to 15-16, the quality factor Qf is up to 54000-65000 GHz, and the temperature coefficient of resonance frequency is small; and thus, the ceramic has 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 circuits in the microwave frequency band (mainly UHF and SHF bands) 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

In recent years, with the development of low temperature co-fired ceramics (Low Temperature Co-fired Ceramics, LTCC) and the requirements of the development of microwave multilayer devices, researchers at home and abroad have carried out extensive exploration and research on some low-temperature co-fired materials, mainly The glass-ceramic or glass-ceramic composite material system is used. Because the low melting point glass phase has relatively high dielectric loss, the existence of the glass phase greatly improves the dielectric loss of the material.

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