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Lanthanum-doped silver niobate lead-free anti-ferroelectric energy storage ceramic material and preparation method thereof

A ceramic material, silver niobate technology, applied in the field of functional ceramic materials, can solve the problems of low turning electric field and breakdown field strength, affecting energy storage performance, etc., achieve good application prospects, high energy storage performance, promote application and The effect of development

Active Publication Date: 2019-04-19
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In recent years, it has been discovered that AgNbO 3 Ceramics have good energy storage properties, but pure AgNbO 3 Ceramics have a ferrielectric phase (M 1 ), which affects the improvement of its energy storage performance, and its turning electric field and breakdown field strength are not high

Method used

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  • Lanthanum-doped silver niobate lead-free anti-ferroelectric energy storage ceramic material and preparation method thereof
  • Lanthanum-doped silver niobate lead-free anti-ferroelectric energy storage ceramic material and preparation method thereof
  • Lanthanum-doped silver niobate lead-free anti-ferroelectric energy storage ceramic material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0060] The energy storage ceramic material is composed of: Ag 0.97 La 0.01 NbO 3 (x=0.01)

[0061] (1) repeat the preparation method of comparative example 1 by above-mentioned formula;

[0062] (2) Carry out XRD test to present embodiment, test result sees figure 1 ;

[0063] (3) carry out surface SEM test to present embodiment, image 3 The surface topography structure diagram of the ceramic sample of the present embodiment is provided;

[0064] (4) Calculate and plot the average grain size of the ceramic sample to obtain Figure 8 ;

[0065] (5) The ceramic samples were tested for dielectric thermogram and dielectric spectrum, and their phase transition temperature diagram was obtained. The test results are shown in Figure 9 ;

[0066] (6) Carry out the hysteresis loop measurement, the calculation of turning electric field and energy storage performance under room temperature to the ceramic sample of present embodiment, the result sees Figure 10-12 .

Embodiment 2

[0068] The energy storage ceramic material is composed of: Ag 0.94 La 0.02 NbO 3 (x=0.02)

[0069] (1) repeat the preparation method of comparative example 1 by above-mentioned formula;

[0070] (2) Carry out XRD test to present embodiment, test result sees figure 1 ;

[0071] (3) carry out surface SEM test to present embodiment, Figure 4 The surface topography structure diagram of the ceramic sample of the present embodiment is provided;

[0072] (4) Calculate and plot the average grain size of the ceramic sample to obtain Figure 8 ;

[0073] (5) The ceramic samples were tested for dielectric thermogram and dielectric spectrum, and their phase transition temperature diagram was obtained. The test results are shown in Figure 9 ;

[0074] (6) Carry out the hysteresis loop measurement, the calculation of turning electric field and energy storage performance under room temperature to the ceramic sample of present embodiment, the result sees Figure 10-12 .

Embodiment 3

[0076] The energy storage ceramic material is composed of: Ag 0.91 La 0.03 NbO 3 (x=0.03)

[0077] (1) repeat the preparation method of comparative example 1 by above-mentioned formula;

[0078] (2) Carry out XRD test to present embodiment, test result sees figure 1 ;

[0079] (3) carry out surface SEM test to present embodiment, Figure 5 The surface topography structure diagram of the ceramic sample of the present embodiment is provided;

[0080] (4) Calculate and plot the average grain size of the ceramic sample to obtain Figure 8 ;

[0081] (5) The ceramic samples were tested for dielectric thermogram and dielectric spectrum, and their phase transition temperature diagram was obtained. The test results are shown in Figure 9 ;

[0082] (6) Carry out the hysteresis loop measurement, the calculation of turning electric field and energy storage performance under room temperature to the ceramic sample of present embodiment, the result sees Figure 10-12 .

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Abstract

The invention relates to a lanthanum-doped silver niobate lead-free anti-ferroelectric energy storage ceramic material and a preparation method thereof. The lanthanum-doped silver niobate lead-free anti-ferroelectric energy storage ceramic material has a single perovskite structure, and has a general formula of Ag1-3xLaxNbO3, wherein x is greater than or equal to 0.01 and smaller than or equal to0.08, preferably x is greater than or equal to 0.03 and smaller than or equal to 0.04.

Description

technical field [0001] The invention belongs to the technical field of functional ceramic materials, in particular to a silver niobate-based lead-free antiferroelectric energy storage ceramic material and a preparation method thereof, and the energy storage ceramic material can be used for energy storage capacitors. Background technique [0002] High energy storage density ceramics are the key materials for making high energy storage capacitors. Due to their advantages such as fast charge and discharge speed, strong anti-cycle aging ability, stable performance under extreme conditions such as high temperature and high pressure, they are widely used in electric vehicles, high-power electronic devices, Pulse power supply, new energy and smart grid systems and other basic scientific research and engineering technology fields have broad applications. [0003] Energy storage medium ceramic materials mainly include linear ceramics, ferroelectric ceramics and antiferroelectric cera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/495C04B35/622
CPCC04B35/495C04B35/622C04B2235/3227C04B2235/3291C04B2235/6583C04B2235/786C04B2235/96
Inventor 毛朝梁马江雷王根水闫世光董显林
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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