Method for preparing BCZT energy-storing ceramic material with adjustable Curie temperature

A technology of Curie temperature and ceramic materials, which is applied in fixed capacitance parts, electrical components, fixed capacitor dielectrics, etc., can solve the problem of miniaturization and light weight of unfavorable energy storage components, restrictions on the application range of dielectric capacitors, nonlinear dielectric materials Poor stability and other problems, to achieve the effect of refining the hysteresis loop, improving energy storage density and energy storage efficiency, and low cost

Inactive Publication Date: 2019-12-20
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Energy storage dielectric capacitors can be used in occasions that require large power output, such as tanks, electromagnetic guns, directed energy weapons, electrified launch platforms, etc. These facilities require a working current of more than 100kA, and ordinary energy devices are difficult to meet this requirement
The limitation of dielectric capacitors is that the energy storage density and energy storage efficiency are low, which is not conducive to the miniaturization and lightweight of energy storage components, and the stability of nonlinear dielectric materials near the phase transition temperature is poor, which restricts the application of dielectric capacitors scope

Method used

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  • Method for preparing BCZT energy-storing ceramic material with adjustable Curie temperature
  • Method for preparing BCZT energy-storing ceramic material with adjustable Curie temperature
  • Method for preparing BCZT energy-storing ceramic material with adjustable Curie temperature

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Experimental program
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Embodiment 1

[0028] Step S1: Ba(NO 3 ) 2 , Ca(NO 3 ) 2 4H 2 O, ZrOCl 2 ·8H 2 O, tetrabutyl titanate, ammonia and citric acid are the initial raw materials, wherein according to Ba 0.85Ca 0.15 Zr 0.1 Ti 0.9 o 3 The stoichiometric ratio of the raw material Ba(NO 3 ) 2 , Ca(NO 3 ) 2 4H 2 O, ZrOCl 2 ·8H 2 O and tetrabutyl titanate;

[0029] Step S2: Dissolve tetrabutyl titanate and citric acid in 10 mL and 30 mL of ethanol respectively, stir each until completely dissolved, then drop the ethanol solution of tetrabutyl titanate into the ethanol solution of citric acid to obtain a mixed solution A, the mol ratio of citric acid and metal cation in mixed solution A is 1.25:1;

[0030] Step S3: Zr(NO 3 ) 4 ·5H 2 O, Ca(NO 3 ) 2 4H 2 O and Ba(NO 3 ) 2 Dissolve in 30mL deionized water and heat to 80°C and stir until completely dissolved to obtain mixed solution B;

[0031] Step S4: Add the mixed solution B obtained in step S3 dropwise to the mixed solution A obtained in step...

Embodiment 2

[0038] Step S1: with Ba(NO 3 ) 2 , Ca(NO 3 ) 2 4H 2 O, ZrOCl 2 ·8H 2 O, tetrabutyl titanate, ammonia and citric acid are the initial raw materials, wherein according to Ba 0.85 Ca 0.15 Zr 0.1 Ti 0.9 o 3 The stoichiometric ratio of the raw material Ba(NO 3 ) 2 , Ca(NO 3 ) 2 4H 2 O, ZrOCl 2 ·8H 2 O and tetrabutyl titanate;

[0039] Step S2: Dissolve tetrabutyl titanate and citric acid in 10 mL and 30 mL of ethanol respectively, stir each until completely dissolved, then drop the ethanol solution of tetrabutyl titanate into the ethanol solution of citric acid to obtain a mixed solution A, the mol ratio of citric acid and metal cation in mixed solution A is 1.25:1;

[0040] Step S3: Zr(NO 3 ) 4 ·5H 2 O, Ca(NO 3 ) 2 4H 2 O and Ba(NO 3 ) 2 Dissolve in deionized water and heat and stir until completely dissolved to obtain mixed solution B;

[0041] Step S4: Add the mixed solution B obtained in step S3 dropwise to the mixed solution A obtained in step S2 to ...

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Abstract

The invention discloses a method for preparing a BCZT energy-storing ceramic material with adjustable Curie temperature, comprising: preparing a solution in which the ratio of metal ions to Ba0.85Ca0.15Zr0.1Ti0.93 is 1.25: 1, and adjusting a pH value, and preparing a sol by heating; drying the sol in a blast drying box and grinding the sol into powders; calcining the prepared powders in a muffle furnace into BCZT oxide powders; grinding and granulating the BCZT oxide powders, and then sintering the BCZT oxide powders in the muffle furnace; finally, coating the sintered ceramic material with silver paste on both sides, and sintering and solidifying the ceramic material at a certain temperature to form a metal silver electrode. The method, by using the Ba0.85Ca0.15Zr0.1Ti0.9O3 ceramic material prepared by a sol-gel method, effectively regulates the Curie temperature of the BCZT ferroelectric ceramic material to the vicinity of room temperature, and is simple in process, low in cost, andhigh in energy storage density and efficiency.

Description

technical field [0001] The invention belongs to the technical field of electronic materials and devices, and in particular relates to a preparation method of a BCZT energy storage ceramic material whose Curie temperature can be adjusted. Background technique [0002] With the rapid development of energy storage technology, dielectric capacitors have attracted extensive attention due to their ultrahigh power density. Energy storage dielectric capacitors can be used in occasions that require large power output, such as tanks, electromagnetic guns, directed energy weapons, electrified launch platforms, etc. These facilities require a working current of more than 100kA, and ordinary energy devices are difficult to meet this requirement. The limitation of dielectric capacitors is that the energy storage density and energy storage efficiency are low, which is not conducive to the miniaturization and lightweight of energy storage components, and the stability of nonlinear dielectri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G4/12C04B35/49C04B35/622C04B35/624
CPCC04B35/49C04B35/622C04B35/624C04B2235/3208C04B2235/3215C04B2235/6562C04B2235/6567H01G4/1227H01G4/1245
Inventor 王显威张碧辉李永艳史永闯王圣洁唐颖尚淑英胡艳春尹少骞尚军
Owner HENAN NORMAL UNIV
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