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Rare earth doped tungsten bronze structural ceramic material with high energy storage property and preparation method of rare earth doped tungsten bronze structural ceramic material

A ceramic material and a rare earth doping technology, applied in the preparation of the ceramic material and the rare earth doped tungsten bronze structure ceramic material field, can solve the problems of low breakdown field strength, limited energy storage performance, low degree of relaxation, etc. The effect of low manpower and site requirements, reduced energy dissipation, and simple operation

Pending Publication Date: 2022-07-08
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its relaxation degree is not high, resulting in a low breakdown field strength, which seriously limits the further improvement of its energy storage performance.

Method used

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  • Rare earth doped tungsten bronze structural ceramic material with high energy storage property and preparation method of rare earth doped tungsten bronze structural ceramic material
  • Rare earth doped tungsten bronze structural ceramic material with high energy storage property and preparation method of rare earth doped tungsten bronze structural ceramic material
  • Rare earth doped tungsten bronze structural ceramic material with high energy storage property and preparation method of rare earth doped tungsten bronze structural ceramic material

Examples

Experimental program
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Effect test

Embodiment 1

[0037]A preparation method of a rare earth-doped tungsten bronze structural ceramic material with high energy storage properties of the present invention is specifically implemented according to the following steps:

[0038] Step 1, according to (Sr 0.485 Ba 0.47 Gd 0.03 ) 0.98 La 0.02 Nb 2 O 6 The stoichiometry of SrCO with a purity of 99.00% was weighed 3 2.4350g BaCO with a purity of 99.00% 3 3.1291g of Nb with a purity of 99.90% 2 O 5 9.1409g La with a purity of 99.99% 2 O 3 0.1119g, 99.99% pure Gd 2 O 3 0.1831g, put it into a nylon jar, use zirconium balls as grinding balls and absolute ethanol as ball milling media, use a ball mill at 400 rpm for 16 hours, place it in a drying box to dry at 80 °C for 15 hours, and grind it with a mortar for 30 hours. minutes, passed through an 80-mesh sieve to obtain a raw material mixture;

[0039] In step 2, the raw material mixture is placed in an alumina crucible and compacted with an agate rod, so that the compact...

Embodiment 2

[0042] In step 1 of this embodiment, according to (Sr 0.485 Ba 0.47 Gd 0.03 ) 0.98 Nd 0.02 Nb 2 O 6 The stoichiometry of SrCO with a purity of 99.00% was weighed 3 2.4344g BaCO with a purity of 99.00% 3 3.1283g Nb with a purity of 99.90% 2 O 5 0.1157g, 99.85% pure Ta 2 O 5 3.4517g Gd with a purity of 99.99% 2 O 3 0.2828g, other steps are the same as in Example 1, to obtain a Gd-Nd co-doped tungsten bronze structure ferroelectric energy storage ceramic material.

Embodiment 3

[0044] In step 1 of this embodiment, according to (Sr 0.485 Ba 0.47 Gd 0.03 ) 0.98 Sm 0.02 Nb 2 O 6 The stoichiometry of SrCO with a purity of 99.00% was weighed 3 2.4344g BaCO with a purity of 99.00% 3 3.1283g Nb with a purity of 99.90% 2 O 5 9.1386g Sm with a purity of 99.999% 2 O 3 0.1197g, 99.99% pure Gd 2 O 3 0.1830g, and other steps are the same as in Example 1, to obtain a Gd-Sm co-doped tungsten bronze structure ferroelectric energy storage ceramic material.

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Abstract

The invention discloses a rare earth doped tungsten bronze structural ceramic material with high energy storage property, the structural formula of the rare earth doped tungsten bronze structural ceramic material is (Sr < 0.53-0.15 x > Ba < 0.47 > Gdx) < 1-y > REyNb2O6, the value of x is 0-0.1, and the value of y is 0.01-0.08. The preparation method comprises the following steps: mixing BaCO3, SrCO3, Gd2O3, RE2O3 and Nb2O5, carrying out ball milling, drying and pre-sintering, and carrying out granulation, tabletting, glue discharging and sintering on the pre-sintered powder. Abnormal growth of non-equiaxed grains of the tungsten bronze structure ceramic is inhibited through an A-site rare earth doped ceramic system, a compact ferroelectric energy storage material is formed, the relaxation characteristic is increased, energy dissipation under an electric field is reduced, in addition, elements such as Bi, Na and K which are easy to volatilize in the high-temperature sintering process are not involved in the ceramic composition, integration of devices is easy, and the application range is wide. And the requirements on equipment, manpower and sites are low.

Description

technical field [0001] The invention belongs to the technical field of ceramic material preparation, in particular to a rare earth-doped tungsten bronze structural ceramic material with high energy storage properties, and a preparation method of the ceramic material. Background technique [0002] In recent years, lead-free piezoelectric ferroelectric materials have not only been studied to improve the performance of piezoelectric ferroelectric materials in order to replace lead-containing materials, but also new functional properties have been found in strain, electric card, thermoelectricity, optoelectronics, luminescence, etc., making them more and more popular. s concern. As an advanced energy storage material, dielectric ceramics, due to their high power density (up to 10 8 W / kg), high working voltage, fast charging and discharging speed and wide working temperature range, etc., it is widely used in hybrid vehicles, microwave communications, pulsed power weapons, electr...

Claims

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Application Information

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IPC IPC(8): C04B35/495C04B35/622C04B35/626C04B35/64
CPCC04B35/495C04B35/622C04B35/6261C04B35/64C04B2235/3213C04B2235/3215C04B2235/3224C04B2235/3227C04B2235/3229C04B2235/96
Inventor 杨变孙少东张佳语杨曼崔杰郭钰
Owner XIAN UNIV OF TECH
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