Hafnium lead titanate-based anti-ferroelectric ceramic material and preparation method thereof

A hafnium lead titanate-based, ceramic material technology, applied in the field of electronic ceramic materials, can solve the problems of easy segregation of defective components, low electrical breakdown strength, and low energy storage density, and achieve excellent energy storage density and few defects , the effect of high energy storage density

Inactive Publication Date: 2021-08-06
CHONGQING UNIV OF ARTS & SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problems of traditional dielectric materials used to make capacitors are: (1) For linear dielectric materials, the dielectric coefficient is usually relatively small, and it is necessary to increase the energy storage density by applying a high electric field strength, which affects the durability of the material. (2) For ferroelectric materials with high dielectric coefficient, although its dielectric coefficient is relatively high under low field strength conditions, its dielectric coefficient is high under high field strength conditions. The electrical coefficient will be greatly reduced, and ferroelectric ceramics with high dielectric constant usually have lower electrical breakdown strength
This patent does not solve the technical problems of low energy storage density due to the large number of internal defects and easy segregation of components in large-volume ceramic materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A hafnium lead titanate-based antiferroelectric ceramic material [(Pb 0.96 Ba 0.04 ) 0.94 La 0.04 ](Hf 0.96 Ti 0.04 )O 3 The preparation method is carried out as follows:

[0044] (1) One ball mill:

[0045] According to [(Pb 0.96 B 0.04 ) 0.94 La 0.04 ](Hf 0.96 Ti 0.04 )O 3 , the corresponding raw material Pb 3 o 4 , HfO 2 、TiO 2 , La 2 o 3 、BaCO 3 Insulate at 100°C for 24 hours, weigh each raw material according to the proportional relationship, and then add Pb 3 o 4 2% Pb by mass 3 o 4 , all raw materials, zirconium balls and absolute ethanol are mixed and carried out ball milling according to the mass ratio of 1:1.2:1, the rotating speed is raised to 300rpm ball milling for 3h, and finally the rotating speed is reduced to 150rpm ball milling for 2h;

[0046] (2) Pre-burning treatment:

[0047] The ball-milled slurry is dried at 70°C, with stirring during the drying process, the zirconium balls are taken out to obtain a mixed powder, and the ...

Embodiment 2

[0055] A hafnium lead titanate-based antiferroelectric ceramic material [(Pb 0.98 Sr 0.02 ) 0.94 La 0.04 ](Hf 0.96 Ti 0.04 )O 3 The preparation method is carried out as follows:

[0056] (1) One ball mill:

[0057] According to [(Pb 0.98 Sr 0.02 ) 0.94 La 0.04 ](Hf 0.96 Ti 0.04 )O 3 The corresponding raw material Pb 3 o 4 , HfO 2 、TiO 2 , La 2 o 3 , SrCO 3 Insulate at 100°C for 24 hours, weigh each raw material according to the proportional relationship, and then add Pb 3 o 4 2% Pb by mass 3 o 4 , all raw materials, zirconium balls and absolute ethanol are mixed and carried out ball milling according to the mass ratio of 1:1.4:1.2, the rotating speed is raised to 300rpm ball milling for 3h, and finally the rotating speed is reduced to 120rpm ball milling for 2h;

[0058] (2) Pre-burning treatment:

[0059] The ball-milled slurry is dried at 80°C, with stirring during the drying process, the zirconium balls are taken out to obtain a mixed powder, and th...

Embodiment 3

[0067] Hafnium lead titanate-based antiferroelectric ceramic materials [(Pb 0.96 Ba 0.04 ) 0.94 La 0.04 ]((Hf 0.8 sn 0.2 ) 0.96 Ti 0.04 )O 3 The preparation method is carried out as follows:

[0068] (1) One ball mill:

[0069] According to [(Pb 0.96 Ba 0.04 ) 0.94 La 0.04 ]((Hf 0.8 sn 0.2 ) 0.96 Ti 0.04 )O 3 will Pb 3 o 4 , HfO 2 、TiO 2 , La 2 o 3 , SnO 2 , SrCO 3 , kept at 100°C for 24 hours, weighed each raw material according to the proportional relationship, and then added Pb 3 o 4 2% Pb by mass 3 o 4 , all raw materials, zirconium balls and absolute ethanol are mixed and carried out ball milling according to the mass ratio of 1:1.2:1, the rotating speed is raised to 300rpm ball milling for 3h, and finally the rotating speed is reduced to 130rpm ball milling for 2h;

[0070] (2) Pre-burning treatment:

[0071] The ball-milled slurry is dried at 60°C, with stirring during the drying process, the zirconium balls are taken out to obtain a mixed ...

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Abstract

A hafnium lead titanate-based anti-ferroelectric ceramic material is characterized in that lead (Pb) in hafnium lead titanate is partially replaced by metal element lanthanum A (La), hafnium (Hf) is partially replaced by tin (Sn), then lead is partially replaced by element B, the chemical formula of the material is [(Pb[1-w]B[w])[1-3z / 2]La[z]][(Hf[1-y]Sn[y])[1-x]Ti[x]]O[3], wherein B is at least one of barium (Ba) and strontium (Sr). The prepared hafnium lead titanate-based anti-ferroelectric ceramic block material has the advantages of compact microstructure, few defects, uniform component distribution, no component segregation, excellent energy storage density (up to 5 J / cm<3>), discharge pulse power (up to 1 MW / cm<3>), high breakdown electric field (up to 250-300 kV / cm), small dielectric loss and stable material performance.

Description

technical field [0001] The invention relates to the technical field of electronic ceramic materials, in particular to a hafnium lead titanate-based antiferroelectric ceramic material and a preparation method thereof. Background technique [0002] A capacitor is a component used to store and release electrical energy and is widely used in electronics and power instruments. Energy storage density (electric energy stored in unit volume) is an important performance index of capacitors. The higher the energy storage density of a capacitor, the greater its ability to store and release electrical energy. With the development of high efficiency and miniaturization of electronic and electric equipment, the industry has an urgent need for capacitors with high energy storage density and high output electric power. At present, the materials used to make capacitors are mainly organic and inorganic dielectric materials, and the electric polarization characteristics of dielectric material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/49C04B35/622
CPCC04B35/49C04B35/622C04B2235/3296C04B2235/3215C04B2235/3227C04B2235/3244C04B2235/3232C04B2235/602C04B2235/656C04B2235/6562C04B2235/6567C04B2235/3213C04B2235/3293
Inventor 唐华孟祥程江李璐
Owner CHONGQING UNIV OF ARTS & SCI
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