Zirconium-enriched lead zirconate titanate-bismuth ferrite multiferroic ceramic material

A technology of zirconium-rich lead zirconate titanate and multiferroic ceramics, applied in the field of functional materials, can solve the problems of weak ferromagnetism of bismuth ferrite, difficulty in saturation polarization, and no ferromagnetism, and achieve low raw material cost and good magnetoelectricity Coupling performance, low cost effect

Inactive Publication Date: 2016-11-23
SHANGHAI NORMAL UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its ferroelectric Curie temperature T C =830°C, antiferromagnetic Neel temperature T N = 370°C, but due to the large leakage of bismuth ferrite, it is difficult to saturate and polarize the ferroelectricity at room temperature, and the ferromagnetism of bismuth ferrite is very weak, which cannot be used in practical applications
The traditional 53 / 47 lead zirconate titanate (PZT) material is completely non-ferromagnetic

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Lead zirconate titanate-bismuth ferrite ceramic material. Its chemical composition is:

[0025] (1-x)Pb(Zr 1-y Ti y )O 3 +z% (weight) Nb 2 o 5 +xBiFeO 3 , where x=0.10, y=0.10, z=1

[0026] The specific process operation process method is as follows:

[0027] 1. Weighing ball mill: according to (1-x)Pb(Zr 1-y Ti y )O 3 +z% (weight) Nb 2 o 5 +xBiFeO 3 , where x=0.10, y=0.10, z=1 The formula to be synthesized is stoichiometrically proportioned, and deionized water is added into a ball mill jar for ball milling, and then ball milled at a suitable speed for several hours.

[0028] 2. Drying and tableting: Dry the ball-milled slurry, take out the dried powder and grind it, pour it into a mold and press it under a certain pressure.

[0029] 3. Pre-calcination: put the compressed tablet into a muffle furnace for calcination and synthesis. The synthesis temperature is kept at 700°C for 1 hour, and then raised to 850°C for two hours.

[0030] 4. Secondary ball mi...

Embodiment 2

[0037] Lead zirconate titanate-bismuth ferrite ceramic material. Its chemical composition is:

[0038] (1-x)Pb(Zr 1-y Ti y )O 3 +z% (weight) Nb 2 o 5 +xBiFeO 3 , where x=0.04, y=0.03, z=1.5

[0039] The specific process operation process method is as follows:

[0040] 1. Weighing ball mill: according to ((1-x)Pb(Zr 1-y Ti y )O 3 +z% (weight) Nb 2 o 5 +xBiFeO 3 , where x=0.05, y=0.03, z=1.5 The formula to be synthesized is stoichiometrically proportioned, and deionized water is added into a ball mill jar for ball milling, and then ball milled at an appropriate speed for several hours.

[0041]2. Drying and tableting: Dry the ball-milled slurry, take out the dried powder and grind it, pour it into a mold and press it under a certain pressure.

[0042] 3. Pre-calcination: put the compressed tablet into a muffle furnace for calcination and synthesis. The synthesis temperature is kept at 700°C for 1 hour, and then raised to 850°C for two hours.

[0043] 4. Secondary...

Embodiment 3

[0050] Lead zirconate titanate-bismuth ferrite ceramic material. Its chemical composition is:

[0051] (1-x)Pb(Zr 1-y Ti y )O 3 +z% (weight) Nb 2 o 5 +xBiFeO 3 , where x=0.05, y=0.05, z=1.5

[0052] The specific process operation process method is as follows:

[0053] 1. Weighing ball mill: according to (1-x)Pb(Zr 1-y Ti y +1wt%Nb 2 o 5 )O 3 +xBiFeO 3 , where x=0.03, y=0.05, z=1.5 The formula to be synthesized is stoichiometrically proportioned, and deionized water is added into a ball mill jar for ball milling, and then ball milled at an appropriate speed for several hours.

[0054] 2. Drying and tableting: Dry the ball-milled slurry, take out the dried powder and grind it, pour it into a mold and press it under a certain pressure.

[0055] 3. Pre-calcination: put the compressed tablet into a muffle furnace for calcination and synthesis. The synthesis temperature is kept at 700°C for 1 hour, and then raised to 850°C for two hours.

[0056] 4. Secondary ball mi...

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Abstract

The invention relates to the field of functional materials, in particular to a zirconium-rich lead zirconate titanate-bismuth ferrite multiferroic ceramic material, the chemical composition of which is: (1-x)Pb(Zr 1‑y Ti y )O 3 +z wt% Nb 2 o 5 +xBiFeO 3 , wherein x=0.005-0.10, y=0.01-0.1, z=0.5-2.0. In the present invention, the zirconium-rich lead zirconate titanate system is selected to modify the zirconium-rich Pb(Zr,Ti)O 3 Materials and BiFeO 3 The material is compounded, and the composition and structure are adjusted to improve the spontaneous polarization and magnetic properties of the material at room temperature, to achieve the coexistence of ferroelectricity and ferromagnetism at room temperature and to have a better magnetoelectric coupling effect. The raw material cost of the multiferroelectric material of the invention is low, the preparation process is simple, and it is easy to store and use, and can be applied to high-tech fields such as energy conversion, sensitive detection and modern communication.

Description

technical field [0001] The invention relates to the technical field of functional materials, in particular to a zirconium-rich lead zirconate titanate-bismuth ferrite multiferroic ceramic material. Background technique [0002] Multiferroic materials refer to materials containing two or more ferrophysical properties in the same phase, such as the coexistence of ferroelectricity and ferromagnetism. In multiferroic materials, some new effects can be produced between different ferroic properties, such as magnetoelectric effect and so on. It is because of these new effects that multiferroic materials have very broad application prospects, and can be widely used in sensors, converters, capacitors and storage devices. Due to their wide application value, multiferroic materials have been intensively studied in recent years. BiFeO 3 It is a multiferroic material that exhibits both ferroelectricity and magnetism (antiferromagnetism) at room temperature. Its ferroelectric Curie te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/491C04B35/626C04B35/64C04B35/634C04B41/80C04B41/88
CPCC04B35/491C04B35/6261C04B35/62645C04B35/62695C04B35/63416C04B35/64C04B41/0045C04B41/009C04B41/5116C04B41/88C04B2235/3251C04B2235/3274C04B2235/3298C04B2235/6562
Inventor 孙大志张信阳宋飞飞严飒朱俊伟王艳许何小骏何夕云仇萍荪潘裕柏王飞飞唐艳学
Owner SHANGHAI NORMAL UNIVERSITY
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