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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, and in particular relates to a zirconium-enriched lead zirconate titanate-bismuth ferrite multiferroic ceramic material. The zirconium-enriched lead zirconate titanate-bismuth ferrite multiferroic ceramic material is prepared from (1-x)Pb(Zr1-yTiy)O3+z wt%Nb2O5+xBiFeO3, wherein x is equal to 0.005 to 0.10, y is equal to 0.01 to 0.1, and z is equal to 0.5 to 2.0. According to the zirconium-enriched lead zirconate titanate-bismuth ferrite multiferroic ceramic material, a zirconium-enriched lead zirconate titanate system is selected for combining a niobium-doped modified zirconium-enriched Pb(Zr,Ti)O3 material and a BiFeO3 material, the composition and structure are adjusted so as to improve the spontaneous polarization and magnetic properties of the material at room temperature, the coexistence of ferroelecteicity and ferromagnetism at room temperature is realized, and a good magnetoelectric effect is achieved. The multiferroic material has the advantages of relatively low cost of used raw materials, simple preparation process and easiness in storage and use and can be applied to the high technical fields of energy conversion, sensitive detection, modern communication and the like.

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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