Temperature-stable high-dielectric-constant dielectric ceramic Ba6Ti3Zr5Nb8O42 and preparation method thereof

A microwave dielectric ceramic and high dielectric constant technology, applied in the field of dielectric ceramic materials, can solve the problems of low quality factor, excessive temperature coefficient of resonance frequency, prediction, etc., and achieve good temperature stability, small temperature coefficient, large temperature coefficient and so on. The effect of applying value
CN104649669AInactive Publication Date: 2015-05-27GUILIN UNIVERSITY OF TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
GUILIN UNIVERSITY OF TECHNOLOGY
Publication Date
2015-05-27
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a temperature-stable high-dielectric-constant dielectric ceramic Ba6Ti3Zr5Nb8O42 and a preparation method thereof. The preparation method comprises the following steps: (1) weighing and proportioning BaCO3, TiO2, ZrO2 and Nb2O5 original powders with the purity of higher than 99.9 wt% according to the composition of the Ba6Ti3Zr5Nb8O42; (2) carrying out wet ball milling mixing on the raw materials in the step (1) for 12 hours by using distilled water as a ball milling medium, drying, and presintering in a 1300-DEG C atmospheric atmosphere for 6 hours; and (3) adding an adhesive into the powder prepared in the step (2), granulating, compacting, and finally, sintering in a 1350-1400-DEG C atmospheric atmosphere for 4 hours, wherein the adhesive adopts a 5 wt% polyvinyl alcohol solution, and the addition amount of the polyvinyl alcohol is 3% of the total mass of the powder. The ceramic has favorable sintering property, the dielectric constant reaches 81.3-83.9, the quality factor Qf value is up to 34000-42000 GHz, the temperature coefficient of resonance frequency is small, and the ceramic has great application value in industry.
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Description

technical field

[0001] The invention relates to a dielectric ceramic material, in particular to a dielectric ceramic material for manufacturing microwave components such as ceramic substrates, resonators and filters used in microwave frequencies 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. [00...

Claims

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