Lead lanthanum zirconate stannate antiferroelectric ceramic as well as preparation method and application thereof

A technology of lanthanum zirconate stannate and antiferroelectricity, which is applied in the field of lanthanum zirconate stannate lead antiferroelectric ceramics and its preparation, can solve the problems of low transition electric field and polarization strength, low energy storage efficiency, etc., and achieve simple preparation method , Improve the effect of density and high energy storage density

Active Publication Date: 2020-07-10
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a long time in the past, the research on lead zirconate block ceramics mainly focused on doping Ti, but because of its relatively low transition electric field and polarization strength, the energy storage efficiency has not been high.

Method used

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  • Lead lanthanum zirconate stannate antiferroelectric ceramic as well as preparation method and application thereof
  • Lead lanthanum zirconate stannate antiferroelectric ceramic as well as preparation method and application thereof
  • Lead lanthanum zirconate stannate antiferroelectric ceramic as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1. According to the stoichiometric ratio of PbO (excess 5wt% PbO), La 2 o 3 , ZrO 2 , SnO 2 Put it in a nylon ball mill jar (250mL), the ball milling medium is zirconia balls (ball diameters are 3mm and 5mm, the mass ratio is about 1:1); use an ordinary planetary ball mill for ball milling, add ethanol, set the speed at 250rmp, and the ball milling time is 24h .

[0036] 2. Put the ball-milled powder in an oven, dry at 60°C for 10 hours, and pass through 40-mesh and 80-mesh sieves respectively to obtain ceramic powder;

[0037] 3. Put the ceramic powder in a muffle furnace for pre-calcination at 900°C for 2 hours, then use an ordinary planetary ball mill to mill, add ethanol, set the speed at 250rmp, and mill for 24 hours for the second ball mill, and place the milled powder in an oven , dried at 60°C for 10 hours, and passed through 40-mesh and 80-mesh sieves respectively to obtain ceramic powder;

[0038]4. Add the obtained ceramic powder to the binder PVB at a m...

Embodiment 2

[0041] Different from Example 1 in that: Pb is produced 0.97 La0.02(Zr x sn 1-x )O 3 (PLZS) Ceramics. where x=0.50 (marked as S2).

Embodiment 3

[0043] Different from Example 1 in that: Pb is produced 0.97 La0.02(Zr x sn 1-x )O 3 (PLZS) Ceramics. where x=0.55 (marked as S3).

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Abstract

The invention belongs to the technical field of dielectric materials, and discloses lead lanthanum zirconate stannate antiferroelectric ceramic as well as a preparation method and an application thereof. The molecular formula of the ceramic is Pb0.97La0.02(ZrxSn1-x) O3, x is equal to 0.45-0.6, and the ceramic is prepared by the following steps: mixing PbO, La2O3, ZrO2 and SnO<2> according to a stoichiometric ratio, adding ethanol, and carrying out ball-milling mixing; drying and sieving the ball-milled powder to obtain ceramic powder; pre-sintering the ceramic powder at 880-980 DEG C, then adding the obtained powder into ethanol for secondary ball milling, and then drying and sieving the ball-milled powder to obtain ceramic powder; adding an adhesive into the obtained ceramic powder, uniformly grinding, and pressing into a ceramic green body under the pressure of 8-10MPa; and maintaining the pressure of the ceramic green body at 45-55MPa, discharging glue at 550-600 DEG C, and sintering at 1225-1230 DEG C to obtain the product. The ceramic has high energy storage density and high energy storage efficiency, and can obtain secondary ferroelectric phase change at room temperature.

Description

technical field [0001] The invention belongs to the technical field of dielectric materials, and in particular relates to a zirconium stannate lead lanthanum antiferroelectric ceramic and its preparation method and application. Background technique [0002] With the development of human science and technology, the application of electronic technology in daily life is increasing, and the requirements for materials used in electronic devices are also getting higher and higher. It is the common goal of our materials workers to prepare materials with excellent performance. At present, widely used capacitors are developing in the direction of high energy storage and miniaturization. Typical energy storage systems mainly include supercapacitors, lithium-ion batteries, and dielectric capacitors. Compared with supercapacitors and lithium-ion batteries, ceramic capacitors are valued for their high-voltage resistance and ultra-high power density, and can be used for high-power weapon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/01C04B35/622C04B35/63
CPCC04B35/01C04B35/622C04B35/6303C04B2235/3227C04B2235/3244C04B2235/3293C04B2235/5427C04B2235/602C04B2235/656C04B2235/6567Y02P20/10
Inventor 鲁圣国赵鹏飞王世斌袁诗嘉
Owner GUANGDONG UNIV OF TECH
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