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A kind of Bnt-based energy storage ceramic material and its preparation method and application

A ceramic material and energy storage technology, which is applied to fixed capacitor parts, fixed capacitors, fixed capacitor dielectrics, etc., can solve the problems that cannot be reduced at the same time, and achieve the effects of avoiding sample defects, reducing pores, and increasing density

Active Publication Date: 2022-06-03
XIAN TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem of not being able to simultaneously reduce Pr and improve sample compactness, the present invention provides a BNT-based energy storage ceramic material and a preparation method thereof, which have high energy storage density, low dielectric loss, large breakdown strength and high temperature stability

Method used

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  • A kind of Bnt-based energy storage ceramic material and its preparation method and application
  • A kind of Bnt-based energy storage ceramic material and its preparation method and application
  • A kind of Bnt-based energy storage ceramic material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This example is a BNT-based energy storage ceramic material whose chemical formula is (Bi 0.5 Na 0.5 Ti 0.95 Al 0.025 O 3 ) 1-x (SrSc 0.5 Nb 0.5 O 3 ) x , where x=0, where x is the number of moles.

[0027] The analytically pure raw material Bi 2 O 3 , Na 2 CO 3 , TiO 2 , Al 2 O 3 , Nb 2 O 5 , SrCO 3 , Sc 2 O 3 Incubate in an oven at 120°C for 12 hours.

[0028] Weigh the raw material obtained in step 1 according to the stoichiometric ratio and pour it into a ball mill jar.

[0029] The raw materials obtained in step 2 were put into a planetary ball mill according to the mass ratio of raw materials: zirconium balls: absolute ethanol as 1:1:2, and the ball milling time was 12h.

[0030] Pour the product of step 3 into a petri dish, put it into an oven at 60° C. to dry, and then use a 60-mesh sieve for sieving to separate the zirconium spheres from the powder.

[0031]The powder obtained in step 4 was raised to 850 °C at 3 °C / min, and kept in a high...

Embodiment 2

[0040] This example is a BNT-based energy storage ceramic material whose chemical formula is (Bi 0.5 Na 0.5 Ti 0.95 Al 0.025 O 3 ) 1-x (SrSc 0.5 Nb 0.5 O 3 ) x , where x=0.05, where x is the number of moles.

[0041] The analytically pure raw material Bi 2 O 3 , Na 2 CO 3 , TiO 2 , Al 2 O 3 , Nb 2 O 5 , SrCO 3 , Sc 2 O 3 Incubate in an oven at 120°C for 12 hours.

[0042] Weigh the raw material obtained in step 1 according to the stoichiometric ratio and pour it into a ball mill jar.

[0043] The raw materials obtained in step 2 were put into a planetary ball mill according to the mass ratio of raw materials: zirconium balls: anhydrous ethanol to 1:1:2 for a ball milling, and the ball milling time was 12h.

[0044] Pour the product of step 3 into a petri dish, put it into an oven at 60° C. to dry, and then sieve it with a 60-mesh sieve to separate the zirconium balls from the powder.

[0045] The powder obtained in step 4 was raised to 850 °C at 3 °C / min...

Embodiment 3

[0054] This example is a BNT-based energy storage ceramic material whose chemical formula is (Bi 0.5 Na 0.5 Ti 0.95 Al 0.025 O 3 ) 1-x (SrSc 0.5 Nb 0.5 O 3 ) x , where x=0.10, where x is the number of moles.

[0055] The analytically pure raw material Bi 2 O 3 , Na 2 CO 3 , TiO 2 , Al 2 O 3 , Nb 2 O 5 , SrCO 3 , Sc 2 O 3 Incubate in an oven at 120°C for 12 hours.

[0056] Weigh the raw material obtained in step 1 according to the stoichiometric ratio and pour it into a ball mill jar.

[0057] The raw materials obtained in step 2 were put into a planetary ball mill according to the mass ratio of raw materials: zirconium balls: anhydrous ethanol to 1:1:2 for a ball milling, and the ball milling time was 12h.

[0058] Pour the product of step 3 into a petri dish, put it into an oven at 60° C. to dry, and then sieve it with a 60-mesh sieve to separate the zirconium balls from the powder.

[0059] The powder obtained in step 4 was raised to 850 °C at 3 °C / min...

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Abstract

The invention discloses a BNT-based energy storage ceramic material and its preparation method and application. Its components (Bi 0.5 Na 0.5 Ti 0.95 Al 0.025 Nb 0.025 o 3 ) 1‑x (SrSc 0.5 Nb 0.5 o 3 ) x , where the value range of x is x=0‑0.15. Within this value range, the material can obtain a large energy storage density, the energy storage efficiency can reach 75.36%, and the energy storage intensity W rec It can reach 2.37J / cm. By doping, the density of the sample is increased, defects are eliminated, and the breakdown field strength Eb is improved, so that the BNT-BAN-based ceramics have high energy storage efficiency and ferroelectricity.

Description

technical field [0001] The invention belongs to the field of functional ceramics, and specifically relates to a BNT-based energy storage ceramic material and a preparation method and application thereof. Background technique [0002] BNT is one of the lead-free energy storage ceramics that has been extensively studied in the last 20 years. The research content mainly focuses on reducing fabrication defects and improving breakdown electric field. Its ferroelectricity is strong, but pure BNT is difficult to sinter into a dense sample, and many defects lead to a relatively low Eb, so BNT is currently difficult to be used as an energy storage medium. At present, the design ideas of the material system are divided into two categories: one is to replace RNPs by doping A and B sites, which is mainly because the ferroelectric domain of RNPs is relatively large, and the Pr is lower after the discharge is completed, thereby releasing more energy; On the other hand, by adding sinteri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/475C04B35/622H01G4/12
CPCC04B35/475C04B35/622H01G4/1218C04B2235/3201C04B2235/3217C04B2235/3213C04B2235/3224C04B2235/3251C04B2235/6562C04B2235/6567C04B2235/768Y02E60/10
Inventor 戴中华王盛彬
Owner XIAN TECH UNIV
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