A high performance single-layer ceramic capacitor material and preparation method

Through the coordinated design of surface-modified zirconia whiskers and strontium titanate nanoribbons, the shortcomings in dielectric properties and mechanical strength and toughness of the single-layer porcelain dielectric capacitor materials are solved, and the high dielectric properties, excellent mechanical properties and long-term stability of the material are achieved, which is suitable for the application of high-end electronic components.

CN119735437AActive Publication Date: 2025-04-01ZHUZHOU HONGDA HENGXIN ELECTRONIC CO LTD
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Patent Information

Application Number
CN202510254689.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-03-05
Publication Date
2025-04-01
Estimated Expiration
2045-03-05

AI Technical Summary

Technical Problem

The existing single-layer porcelain dielectric capacitor materials have shortcomings in dielectric properties and mechanical strength and toughness, and are difficult to meet the application needs of high-frequency, high-power electronic equipment and harsh environments.

Method used

The coordinated design of surface-modified zirconia whiskers and strontium titanate nanoribbons is adopted, and a silane coupling agent is introduced through ultrasonic treatment of sulfuric acid solution and hydrothermal reaction to improve the dispersion and interface binding force of zirconia whiskers, and a stable barium titanate/strontium titanate coherent interface is formed through hydrothermal reaction and optimization of doping elements.

Benefits of technology

It significantly improves the fracture toughness, mechanical impact resistance and temperature stability of the material, while maintaining stable dielectric constant and low loss characteristics, and is suitable for the manufacturing of high-end electronic components.

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Abstract

The present invention relates to the field of capacitor materials, and provides a high-performance single-layer ceramic capacitor material and a preparation method thereof. The material comprises surface-modified zirconium oxide whiskers, strontium titanate nanobelts, barium titanate nanoparticles, barium nitrate, tetraisopropyl titanate, tetramethylammonium hydroxide, ammonium polyacrylate, lanthanum oxide, niobium oxide, manganese dioxide, nano-silicon dioxide and an ethanol-water mixed solution. The zirconium oxide whiskers are modified with a KH-550 silane coupling agent to improve the dispersibility and interfacial bonding force of the reinforcing phase. The introduction of strontium titanate nanobelts optimizes the coherent interface of barium titanate / strontium titanate, and improves the dielectric properties and mechanical strength of the material. Ultrasonic dispersion, ball milling mixing, doping tape casting and gradient sintering processes are adopted to enable the material to achieve high density, low dielectric loss and excellent temperature stability. The present invention overcomes the deficiencies of existing single-layer ceramic capacitor materials in dielectric properties and mechanical strength, and is suitable for the field of high-reliability electronic component manufacturing.
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