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Ceramic material integrating high energy storage density and efficiency, and preparation method thereof

A technology of high energy storage density and ceramic materials, which is applied in the field of sodium niobate-based ceramic materials and its preparation, can solve the problems of limited practical application, difficulty in high energy storage density and high energy storage efficiency, and achieve easy mass production, High energy storage density, the effect of reducing dielectric loss

Active Publication Date: 2019-09-06
XIAN INT UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, lead-free energy storage ceramic materials are mainly concentrated in BaTiO 3 , SrTiO 3 , (Bi 0.5 Na 0.5 )TiO 3 , (K 0.5 Na 0.5 )NbO 3 and AgNbO 3 However, it is difficult for these materials to have high energy storage density and high energy storage efficiency at the same time
For example, Shen et al prepared 0.91BaTiO 3 -0.09BiYbO 3 Ceramics, whose energy storage efficiency is as high as 87%, but the energy storage density is only 0.71J / cm 3 ; Zhao et al prepared AgNbO 3 +0.1wt%MnO 2 Ceramics with an energy storage density as high as 2.5J / cm 3 , but the energy storage efficiency is only 56%, which limits their practical applications

Method used

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  • Ceramic material integrating high energy storage density and efficiency, and preparation method thereof
  • Ceramic material integrating high energy storage density and efficiency, and preparation method thereof
  • Ceramic material integrating high energy storage density and efficiency, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] S1. Calculation and weighing: After drying the raw materials of analytically pure anhydrous sodium carbonate, niobium pentoxide, bismuth trioxide and hafnium dioxide at 120°C for 15 hours, according to the chemical formula 0.95NaNbO 3 -0.05 (Bi 0.5 Na 0.5 )HfO 3 The stoichiometric ratio in the above-mentioned raw materials was weighed, and poured into a ball mill jar to obtain a mixture;

[0044] S2, ball milling: the mixture obtained in step S1 is mixed with ZrO in ethanol 2 The ball is a medium planetary ball mill for 12 hours, dried and sieved to obtain a dry powder;

[0045] S3. Pre-calcination: pre-calcine the dry powder obtained in step S2 in air at 920° C. for 5 hours, grind and sieve to obtain powder A;

[0046] S4, multiple ball milling: the powder A obtained in step S3 is planetary ball milled in ethanol for 12 hours, after drying, the powder is then planetary ball milled in ethanol for 12 hours, ball milled three times in turn, and finally dried to obtain...

Embodiment 2

[0057] S1. Calculation and weighing: After drying the raw materials of analytically pure anhydrous sodium carbonate, niobium pentoxide, bismuth trioxide and hafnium dioxide at 140°C for 13 hours, according to the chemical formula 0.92NaNbO 3 -0.08 (Bi 0.5 Na 0.5 )HfO 3 The stoichiometric ratio in the above-mentioned raw materials was weighed, and poured into a ball mill jar to obtain a mixture;

[0058] S2, ball milling: the mixture obtained in step S1 is mixed with ZrO in ethanol 2 The ball is a medium planetary ball mill for 15 hours, dried and sieved to obtain a dry powder;

[0059] S3. Pre-calcination: pre-calcine the dry powder obtained in step S2 in air at 900°C for 8 hours, grind and sieve to obtain powder A;

[0060] S4, multiple ball milling: the powder material A obtained in step S3 was planetary ball milled in ethanol for 15 hours, after drying, the powder material was planetary ball milled in ethanol for 20 hours, ball milled twice in turn, and finally dried to...

Embodiment 3

[0069] S1. Calculation and weighing: After drying the raw materials of analytically pure anhydrous sodium carbonate, niobium pentoxide, bismuth trioxide and hafnium dioxide at 150°C for 10 hours, according to the chemical formula 0.89NaNbO 3 -0.11 (Bi 0.5 Na 0.5 )HfO 3 The stoichiometric ratio in the above-mentioned raw materials was weighed, and poured into a ball mill jar to obtain a mixture;

[0070] S2, ball milling: the mixture obtained in step S1 is mixed with ZrO in ethanol 2 The ball is a medium planetary ball mill for 20 hours, dried and sieved to obtain a dry powder;

[0071] S3. Pre-calcination: pre-calcine the dry powder obtained in step S2 in air at 890°C for 10 hours, grind and sieve to obtain powder A;

[0072] S4, multiple ball milling: the powder A obtained in step S3 was planetary ball milled in ethanol for 15 hours, after drying, the powder was then planetary ball milled in ethanol for 12 hours, ball milled three times in turn, and finally dried to obtai...

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Abstract

The invention discloses a ceramic material integrating high energy storage density and efficiency, and a preparation method thereof, wherein the chemical formula is (1-x)NaNbO3-x(Bi0.5Na0.5)HfO3, x ismore than or equal to 0.05 and is less than or equal to 0.2, and the material is obtained through material matching, ball milling, pre-firing, secondary ball milling, granulation molding, debinding,firing, polishing and coating with a silver electrode. According to the present invention, the energy storage density calculated based on electric hysteresis loop is 0.99-3.51 J / cm<3>, and the energystorage efficiency is 60-80.1%; and the material as the novel energy storage ceramic material has advantages of high energy storage density, simple preparation process, low cost, no pollution, easy mass production and the like, and further has strong practicability.

Description

technical field [0001] The invention relates to the technical field of dielectric energy storage ceramic materials, in particular to a sodium niobate-based ceramic material with high energy storage density and high energy storage efficiency and a preparation method thereof. Background technique [0002] In the late 1970s, with the research and increasingly wide application of technologies such as nuclear physics, electron beams, accelerators, lasers, discharge theory and plasma, pulse power technology began to be widely used in the fields of national defense, scientific experiments, industry, agriculture and medicine. . Since the beginning of the 21st century, pulse power technology and high-voltage new technology have gradually become emerging disciplines with high coverage and high-tech integration, and are one of the most dynamic sub-disciplines in the field of electrical science. With the development of science and technology, especially the needs of developed countries...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/495C04B35/622C04B35/626C04B41/88
CPCC04B35/495C04B35/622C04B35/62605C04B41/5116C04B41/88C04B2235/3201C04B2235/3244C04B2235/3298C04B2235/6562C04B2235/6567C04B2235/661C04B41/4539C04B41/0072
Inventor 杜红亮
Owner XIAN INT UNIV
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