Iron-based sodium barium niobate ceramic material with high energy storage performance and preparation method of iron-based sodium barium niobate ceramic material

By performing iron ion replacement in barium niobate ceramics and using standard solid phase sintering, the problem of poor sintering performance of traditional barium niobate ceramics is solved, significantly improving the density and energy storage performance of the material, and achieving efficient energy storage density and breakdown field strength.

CN119638418AActive Publication Date: 2025-03-18NANJING XIAOZHUANG UNIV
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Patent Information

Application Number
CN202411682685.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-22
Publication Date
2025-03-18
Estimated Expiration
2044-11-22

AI Technical Summary

Technical Problem

Traditional barium niobate ceramics have poor sintering performance and are difficult to prepare. After sintering, the samples are difficult to obtain dense structures and are prone to cracks. Their breakdown strength is small and their energy storage density is low, making it difficult to meet the needs of modern industries.

Method used

By performing iron ion replacement in barium niobate sodium ceramic, the composition of Ba4-2xSm2xNa2FexNb10-xO30 is specifically adopted, where 1≤x≤1.25 is used to replace Ba2+ in position A and Fe3+ in position B, and sintering is carried out by standard solid phase method to obtain iron-based barium niobate sodium ceramic material with high energy storage performance.

Benefits of technology

The density of ceramic materials is significantly improved, pores and cracks are reduced, breakdown field strength, energy storage density and energy storage efficiency are improved, the maximum breakdown field strength reaches 510kV/cm, the energy storage density is 5.02J/cm3, and the energy storage efficiency is 74.5%.

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Abstract

The invention discloses an iron-based sodium barium niobate ceramic material with high energy storage performance and a preparation method thereof, the composition of the iron-based sodium barium niobate ceramic material is Ba (4-2x) Sm (2x) Na2FexNb (10-x) O30, and x is greater than or equal to 1 and less than or equal to 1.25. Barium carbonate, samarium oxide, sodium carbonate, ferric oxide and niobium pentoxide are used as raw materials, and a standard solid-phase method is adopted for sintering to prepare the samarium-doped barium carbonate. According to the product formula, iron is selected to replace niobium in barium sodium niobate, the product is lead-free and environment-friendly, iron reserves are rich, the price is low, the cost of raw materials is favorably controlled, iron replacement is favorable for enhancing the relaxor ferroelectric property of the material, a slender ferroelectric hysteresis loop can be obtained, and the energy storage efficiency of the material is improved. The prepared ceramic material has the advantages of few pores and cracks, high density, obviously improved microstructure, finer and more uniform grain size, obviously improved ferroelectric polarization strength and obviously improved breakdown field strength, solves the problem that the barium sodium niobate material is difficult to sinter, and obviously improves the ferroelectric property and energy storage property.
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