Microwave dielectric ceramic BaCu2V2O8 with low temperature sintering function and preparation method thereof

Abstract

The invention discloses microwave dielectric ceramic BaCu2V2O8 with a low temperature sintering function and a preparation method thereof. The microwave dielectric ceramic BaCu2V2O8 with the low temperature sintering function comprises BaCu2V2O8. The preparation method comprises the following steps of: (1) weighing and burdening raw powder containing BaCO3, CuO and V2O5 and having the purity of 99.9 percent according to a BaCu2V2O8 chemical formula; (2) carrying wet ball-grinding and mixing for 12 hours, drying and then presintering for 6 hours in an atmosphere of 600 DEG C, wherein the solvent is distilled water; (3), adding a binder, granulating, then carrying out compression molding and finally sintering for 4 hours in an atmosphere of 650-680 DEG C, wherein the binder is a polyvinyl alcohol solution with the mass concentration of 5 percent and accounts for 3 percent by total mass of the powder. The ceramic prepared by using the preparation method has a favorable sintering property at 650-680 DEG C, the dielectric constant reaching 19-20, the quality factor Qf up to 67000-86000GHz and small temperature coefficient of resonance frequency, can be co-sintered with an Ag electrode at low temperature and has a great application value in the 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

[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 Mo are easy to have interfacial reaction with the Ag electrode and the raw material TeO 2 Toxicity limits the application of these Bi, Te and Mo-based materials, so low-fire high-performance microwave dielectric ceramic systems are still very limited, which largely limits the development of low-temperature co-firing technology and microwave multilayer devices

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