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Lead-free BiFeO3-based ferroelectric ceramic material with high energy storage density and high energy storage efficiency and preparation method thereof

A technology of ceramic materials and ferroelectric ceramics, applied in circuits, capacitors, electrical components, etc., can solve problems such as environmental protection and adverse human health, and achieve the effects of reducing residual polarization, reducing loss, and high polarization

Active Publication Date: 2019-02-01
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this is very detrimental to environmental protection and human health

Method used

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  • Lead-free BiFeO3-based ferroelectric ceramic material with high energy storage density and high energy storage efficiency and preparation method thereof
  • Lead-free BiFeO3-based ferroelectric ceramic material with high energy storage density and high energy storage efficiency and preparation method thereof
  • Lead-free BiFeO3-based ferroelectric ceramic material with high energy storage density and high energy storage efficiency and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Lead-free BiFeO 3 The composition of the base energy storage ceramic material is: 0.62BiFeO 3 -0.34BaTiO 3 -0.04Ba(Zn 1 / 3 Ta 2 / 3 )O 3 +0.15wt%.MnCO 3 , The steps of its preparation method include:

[0039] (1) Calculate the composition of each component Bi in the powder raw material according to the above chemical formula 2 O 3 , BaCO 3 , TiO 2 , Ta 2 O 5 , ZnO, MnCO 3 , Fe 2 O 3 The mass is prepared according to the composition ratio, mixed by wet ball milling, dried and compressed, and then calcined to obtain ceramic powder. Mix for 24 hours according to the mass ratio of raw material: ball: alcohol = 1:2:1 to make each component well mixed. After drying, pass through a 40-mesh sieve, briquette, heat up to 800°C at a heating rate lower than 5°C / min in an air atmosphere, and keep the temperature for 5 hours to synthesize ceramic powder;

[0040] (2) Grind the ceramic powder obtained in step (1) and pass through a 40-mesh sieve. Then according to the mass ratio of raw mater...

Embodiment 2

[0045] Lead-free BiFeO 3 The composition of the base energy storage ceramic material is: 0.60BiFeO 3 -0.34BaTiO 3 -0.06Ba(Zn 1 / 3 Ta 2 / 3 )O 3 +0.15wt%.MnCO 3 ;

[0046] Repeat the preparation method of Example 1 according to the above formula to obtain the lead-free BiFeO 3 Based energy storage ceramic materials.

[0047] The sintered lead-free BiFeO 3 The base energy storage ceramic material is thinned, cleaned, dried, screen-printed with silver paste, then dried, heated to 750°C at a heating rate of 2°C / min, and kept for 30 minutes to obtain ceramic components.

[0048] The ceramic element prepared in Example 2 was subjected to unipolar hysteresis loops under different electric fields at room temperature. The results are shown in figure 2 , The maximum polarization intensity (P max ), the residual polarization (P r ) And the amount of change in polarization (P max -Pr) as the electric field changes, see figure 2 The illustration and the calculation of the maximum reversible energ...

Embodiment 3

[0050] Lead-free BiFeO 3 The composition of the base energy storage ceramic material is: 0.56BiFeO 3 -0.34BaTiO 3 -0.10Ba(Zn 1 / 3 Ta 2 / 3 )O 3 +0.15wt%.MnCO 3 ;

[0051] Repeat the preparation method of Example 1 according to the above formula to obtain the lead-free BiFeO 3 Based energy storage ceramic materials.

[0052] The sintered lead-free BiFeO 3 The base energy storage ceramic material is thinned, cleaned, dried, screen-printed with silver paste, then dried, heated to 750°C at a heating rate of 2°C / min, and kept for 30 minutes to obtain ceramic components.

[0053] The ceramic element prepared in Example 3 was subjected to unipolar hysteresis loops under different electric fields at room temperature. The results are shown in image 3 , The maximum polarization intensity (P max ), the residual polarization (P r ) And the amount of change in polarization (P max -P r ) As the electric field changes, see image 3 The middle inset and the calculation of the maximum reversible energ...

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Abstract

The invention relates to a lead-free BiFeO3-based ferroelectric ceramic material with high energy storage density and high energy storage efficiency and a preparation method thereof. The lead-free BiFeO3-based energy-storage ceramic material is a ferroelectric phase at the room temperature, and the chemical composition is (1-z-x)BiFeO3-zBaTiO3-xBa(Zn1 / 3Ta2 / 3)O3+yMnCO3, wherein x is greater than orequal to 0 and less than or equal to 0.10, z is greater than or equal to 0.32 and less than or equal to 0.36, y is greater than or equal to 0 and less than or equal to 0. 15wt%, and y is a mass percent ratio of MnCO3 to (1-z-x)BiFeO3-zBaTiO3-xBa(Zn1 / 3Ta2 / 3)O3.

Description

Technical field [0001] The invention relates to a lead-free energy storage ceramic material, in particular to a lead-free BiFeO 3 Based ferroelectric ceramic materials belong to the field of functional ceramics. Background technique [0002] With the rapid development of electronic information technology, people are increasingly demanding the use of equipment. In order to achieve higher performance, miniaturization, miniaturization and integration are the development trends of electronic components. As an important energy storage device, the capacitor is one of the electronic components that are widely used in electronic equipment. Ceramic capacitors are widely used because they have the advantages of wide operating temperature range, long life, and reliable performance. Among them, ferroelectric ceramic materials have the advantages of large dielectric constant and strong nonlinear effects. The energy storage density and efficiency of ferroelectric ceramic materials per unit v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/622H01G4/12
CPCC04B35/2633C04B35/2658C04B35/622C04B2235/3215C04B2235/3236C04B2235/3251C04B2235/3262C04B2235/3284C04B2235/3298C04B2235/442C04B2235/6562C04B2235/6567H01G4/1209H01G4/1218
Inventor 董显林刘宁涛梁瑞虹
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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