High-energy-storage sodium bismuth titanate-strontium titanate matrix material and preparation method thereof

A technology of sodium bismuth titanate and dielectric materials, which is applied in the field of ceramic materials, can solve the problems of lowering the sintering temperature and increasing the density of the system, and achieves the effect of low cost and good energy storage characteristics
CN109574656AInactive Publication Date: 2019-04-05WUHAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
WUHAN UNIV OF TECH
Publication Date
2019-04-05
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a high-energy-storage sodium bismuth titanate-strontium titanate matrix material. The chemical formula of the high-energy-storage sodium bismuth titanate-strontium titanate matrix material is 0.5Bi0.5Na0.5TiO3-0.5SrTiO3-x wt%MgO, wherein x=0.5-3.0. A preparation method of the high-energy-storage sodium bismuth titanate-strontium titanate matrix material comprises the following steps of preparing SrCO3, TiO2, Bi2O3, Na2CO3 and MgO by weight ratio according to the chemical formula into a ceramic powder, performing ball milling, drying and pelletizing, and then pressing the ceramic powder in a tablet press into a ceramic blank; rubber-discharging and sintering the ceramic blank inside a muffle furnace to obtain a ceramic sample. The preparation method of the high-energy-storage sodium bismuth titanate-strontium titanate matrix material is simple in preparation process, low in cost and free from pollution; the prepared high-energy-storage sodium bismuth titanate-strontium titanate matrix material achieves a high discharging energy storage density of 1.61-2.17 J / cm3 and a high breakdown strength of 137-226 KV / cm.
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Description

technical field

[0001] The invention relates to the technical field of ceramic materials applied to electronic components, in particular to a high-energy-storage sodium bismuth titanate-strontium titanate-based dielectric material and a preparation method thereof. Background technique

[0002] The high power and miniaturization of the pulse power system requires the research of energy storage dielectrics with excellent performance as components, which requires materials with high dielectric constant, low dielectric loss and high breakdown field strength, so that the storage of the device High energy density and high energy storage efficiency. For BNT-based relaxor ferroelectrics, the dielectric relaxation behavior is caused by the thermal evolution of PNRs, so that BNT has a high polarization ability, and the remanent polarization and coercive field strength of BNT are relatively high. Large, can basically meet the requirements of energy storage dielectric ceramics. Howeve...

Claims

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