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High-efficiency high-energy-storage sodium niobate-based ceramic material and preparation method thereof

A ceramic material and sodium niobate-based technology, applied in the field of high-efficiency and high-energy-storage sodium niobate-based ceramic materials and their preparation, can solve the problems of low energy storage density, short service life, small discharge current, etc., and achieve high energy storage capacity. The effect of energy density, large output current, and long charge and discharge life

Inactive Publication Date: 2022-01-14
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

The former has problems such as low energy storage density and prone to failure and explosion; the latter has problems such as short service life and small discharge current.

Method used

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  • High-efficiency high-energy-storage sodium niobate-based ceramic material and preparation method thereof
  • High-efficiency high-energy-storage sodium niobate-based ceramic material and preparation method thereof
  • High-efficiency high-energy-storage sodium niobate-based ceramic material and preparation method thereof

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Embodiment Construction

[0026] The present invention introduces (Bi 0.5 Na 0.5 ) 0.7 Sr 0.3 TiO 3 with 0.9NaNbO 3 -0.1Bi(Mg 0.667 Nb 0.333 )O 3 A uniform solid solution is formed to increase the maximum polarization strength of the ceramic material, thereby obtaining a dielectric ceramic material with high energy storage density.

[0027] Introduced in the present invention (Bi 0.5 Na 0.5 ) 0.7 Sr 0.3 TiO 3 has the following advantages:

[0028] (Bi 0.5 Na 0.5 ) 0.7 Sr 0.3 TiO 3 The hybridization of the 6s of Bi and the 2p orbital of O is beneficial to obtain high saturation polarization.

[0029] When introduced (Bi 0.5 Na 0.5 ) 0.7 Sr 0.3 TiO 3 When, [(Bi 0.5 Na 0.5 ) 0.7 Sr 0.3 ] 2+ and Ti 4+ respectively into 0.9NaNbO 3 -0.1Bi(Mg 0.667 Nb 0.333 )O 3 The A-site and B-site of the ceramic further destroy its long-range ferroelectric ordered structure, promote the formation of polar nano-micro-domains, and are beneficial to obtain low remnant polarization.

[0030] T...

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Abstract

The invention relates to the technical field of dielectric ceramic materials, and particularly discloses a high-efficiency high-energy-storage sodium niobate-based ceramic material and a preparation method thereof. The chemical composition formula of the material is (1-x)[0.9NaNbO3-0.1Bi(Mg0.667Nb0.333)O3]-xmol%(Bi0.5Na0.5)0.7Sr0.3TiO3 (x is larger than or equal to 0.05 and smaller than or equal to 0.4), wet ball milling is carried out by adopting a solid-phase reaction method and taking an ethanol solution as a ball milling medium, and raw powder uniform in particle size is obtained. The high-performance energy storage ceramic is prepared by adopting a traditional sintering process.

Description

technical field [0001] The invention relates to the technical field of dielectric ceramic materials, in particular to a sodium niobate-based ceramic material with high efficiency and high energy storage and a preparation method thereof. Background technique [0002] At present, the types of initial energy mainly include electrical energy (solid capacitors, supercapacitors, inductors, etc.), mechanical energy (electric motors, inertial energy storage) and chemical energy (lithium batteries, fuel cells). Among them, solid capacitors are known for their high power density (~10 8 W / kg), fast charging and discharging speed (<1μs), and long cycle life (~500,000 times) have become the preferred energy storage method for pulse power technology, but its energy storage density (W rec ) is relatively low (10 -2 -10 1 Wh / kg), which cannot meet the needs of integration, light weight and miniaturization of pulse power devices. [0003] At present, the capacitors used in high-power...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/495C04B41/88
CPCC04B35/495C04B41/88C04B41/009C04B41/5116C04B2235/3234C04B2235/442C04B2235/3298C04B2235/3206C04B2235/96C04B41/4539
Inventor 陈秀丽董小燕周焕福张海林邓炼
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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