Anti-ferroelectric ceramic material and preparation method thereof

A ceramic material and antiferroelectric technology, which is applied in the field of antiferroelectric ceramic materials and its preparation, can solve the problems of large energy loss and achieve the effects of improved efficiency, high energy storage efficiency, and economical and practical

Active Publication Date: 2019-10-18
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are many researches on improving the energy storage behavior of antiferroelectric ceramics. In terms of improving the energy storage density of antiferroelectric ceramics, such as the Chinese invention patent with the patent number CN201810214293.1 "An Antiferroelectric Ceramic Material with High Energy Storage Density" and its preparation method" (authorized announcement number is CN108358630A), the antiferroelectric ceramics prepared in this invention have a releasable energy storage density of 2.68J / cm under a working electric field of 23.5kV / mm 3 , but the energy loss is large, and the energy storage efficiency is 78%. Research on improving the energy storage efficiency of antiferroelectric ceramics, such as the Chinese invention patent "A High Energy Storage Efficiency Lanthanum Doped Zirconium Titanium" with the patent number CN201510109369.0 Lead stannate antiferroelectric ceramics and its preparation method" (authorized announcement number is CN104725041A), the energy storage efficiency of the antiferroelectric ceramics prepared in this invention reaches 90.4%, but the effective energy storage density is only 1.28J / cm 3

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  • Anti-ferroelectric ceramic material and preparation method thereof
  • Anti-ferroelectric ceramic material and preparation method thereof

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preparation example Construction

[0025] A method for preparing an antiferroelectric ceramic material, comprising:

[0026] (1) Select Pb with a purity greater than 99% 3 o 4 、BaCO 3 , La 2 o 3 , ZrO 2 , SnO 2 As a raw material for antiferroelectric ceramics;

[0027] (2) weigh according to chemical composition, add ball milling medium and carry out ball milling, discharging, drying;

[0028] (3) Calcining the dried powder in a muffle furnace at 800-900°C for 2-3 hours;

[0029] (4) The calcined powder is subjected to secondary ball milling, discharging, drying, adding PVA to granulate, and pressing it into a ceramic disc under a pressure of 6-8 MPa;

[0030] (5) Debinding the obtained ceramic green body in a muffle furnace, and keeping it warm at 500-600° C. for 5-10 hours;

[0031] (6) The ceramic green body after debinding is sintered at 1200-1350°C, the heating rate is controlled at 2-5°C / min, and the temperature is kept at the highest temperature for 2-5h, and after natural cooling to room temper...

Embodiment 1

[0034] The chemical composition of antiferroelectric ceramics is (Pb 0.91 Ba 0.015 La 0.05 )(Zr 0.6 sn 0.4 )O 3 , including the following steps:

[0035] (1) Select Pb with a purity greater than 99% 3 o 4 、BaCO 3 , La 2 o 3 , ZrO 2 , SnO 2 As a raw material for antiferroelectric ceramics;

[0036] (2) weigh according to chemical composition, add ball milling medium and carry out ball milling, discharging, drying;

[0037] (3) Calcining the dried powder in a muffle furnace at 900°C for 3 hours;

[0038] (4) The calcined powder is subjected to secondary ball milling, discharged, dried, then added with PVA for granulation, and pressed into ceramic discs under a pressure of 8 MPa;

[0039] (5) Debinding the obtained ceramic green body in a muffle furnace, and keeping it warm at 600° C. for 10 hours;

[0040] (6) The ceramic green body after debinding is sintered at 1275°C, the heating rate is controlled at 2°C / min, and the temperature is kept at the highest temperat...

Embodiment 2

[0043] The chemical composition of antiferroelectric ceramics is (Pb 0.91 Ba 0.03 La 0.04 )(Zr 0.6 sn 0.2 )O 3 , including the following steps:

[0044] (1) Select Pb with a purity greater than 99% 3 o 4 、BaCO 3 , La 2 o 3 , ZrO 2 , SnO 2 As a raw material for antiferroelectric ceramics;

[0045] (2) weigh according to chemical composition, add ball milling medium and carry out ball milling, discharging, drying;

[0046] (3) Calcining the dried powder in a muffle furnace at 900°C for 3 hours;

[0047] (4) The calcined powder is subjected to secondary ball milling, discharged, dried, then added with PVA for granulation, and pressed into ceramic discs under a pressure of 8 MPa;

[0048] (5) Debinding the obtained ceramic green body in a muffle furnace, and keeping it warm at 600° C. for 10 hours;

[0049] (6) The ceramic green body after debinding is sintered at 1275°C, the heating rate is controlled at 2°C / min, and the temperature is kept at the highest temperatu...

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Abstract

The invention relates to an anti-ferroelectric ceramic material and a preparation method thereof. The chemical general formula of the anti-ferroelectric ceramic material is (Pb<0.91>Ba<x>La<0.06-2x/3>) (Zr<y>Sn<1-y>) O<3>, wherein 0<x<0.09, and 0<y<1. Compared with the prior art, the anti-ferroelectric ceramic material prepared by a traditional electronic ceramic preparation process has the characteristics of high energy storage density, small hysteresis, high energy storage efficiency and excellent charge discharge performance, and is of great significance for the development of pulse power capacitors with high energy storage density and high energy storage efficiency with long cycle charge discharge life.

Description

technical field [0001] The invention belongs to the field of functional ceramics, and in particular relates to an antiferroelectric ceramic material with high energy storage density, high energy storage efficiency and excellent charging and discharging performance and a preparation method thereof. Background technique [0002] With the advancement of science and technology, pulse power technology has been widely used in various fields such as industry, construction, biomedicine and cutting-edge technology. In the pulse power device, the energy storage system is the main component, and the energy storage capacitor is the most widely used energy storage device at present. High energy storage density, miniaturization, and lightweight capacitors have become the long-term development direction of the industry. Therefore, the demand for new energy storage materials with high energy storage density and high energy storage efficiency is very urgent, and it has become one of the hot ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/622
CPCC04B35/48C04B35/622C04B2235/3215C04B2235/3227C04B2235/3293C04B2235/3296C04B2235/6562C04B2235/6567
Inventor 翟继卫黄凯威葛广龙沈波
Owner TONGJI UNIV
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