A preparation method of a manganese and bismuth co-doped barium strontium titanate ceramic material with high dielectric performance

By co-doping manganese and bismuth in the liquid phase and combining ball milling and laser etching techniques, the problem of improving the dielectric properties of barium strontium titanate ceramics was solved, and barium strontium titanate ceramics with high dielectric constant and low dielectric loss were prepared, which are suitable for electronic and optoelectronic devices.

CN117263673BActive Publication Date: 2025-12-12DALIAN UNIV
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Patent Information

Application Number
CN202311298621.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-10-09
Publication Date
2025-12-12
Estimated Expiration
2043-10-09

AI Technical Summary

Technical Problem

Existing barium strontium titanate ceramic materials have limited improvement in dielectric properties. Single doping results in low dielectric constant and high dielectric loss, and the powder prepared by liquid phase has large particles and agglomeration.

Method used

By using a liquid-phase method to co-dope manganese and bismuth, combined with ball milling and laser etching techniques, smaller, more uniform, and agglomerated barium strontium titanate powder was prepared. The dielectric properties were then improved by ball milling and laser etching sintering.

Benefits of technology

The obtained barium strontium titanate ceramic material has a significantly improved dielectric constant and reduced dielectric loss, making it suitable for electronic devices such as microwave tunable oscillators and filters, and possessing green and environmentally friendly characteristics.

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Abstract

The application belongs to the technical field of material science and engineering, and discloses a preparation method of manganese and bismuth co-doped barium strontium titanate ceramic material with high dielectric property. The application adopts a liquid phase method to react titanium tetrachloride, barium chloride, strontium chloride, oxalic acid, manganese oxide and bismuth oxide to obtain uniform barium strontium titanate powder. Co-doping is selected in the aspect of doping, and the manganese and bismuth co-doped barium strontium titanate is the first case. The preparation method highlights that the particle size of the prepared barium strontium titanate powder is smaller and uniform without agglomeration, and the barium strontium titanate powder has the characteristics of high dielectric constant and low dielectric loss.
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Citation Information

Patent Citations

  • Prep. of strontium titanate barium ceramic target

    CN1448368A

  • Piezoelectric material, manufacturing method of piezoelectric material, piezoelectric actuator, manufacturing method of piezoelectric actuator

    JP2014172799A