Piezoelectric material and magnetoelectric composite

A technology of magnetoelectric composite materials and piezoelectric materials, applied in the selection of materials, piezoelectric/electrostrictive/magnetostrictive devices, circuits, etc., can solve problems such as low magnetoelectric effect, human body and environmental hazards, and achieve Strong magnetoelectric effect, strong resonance magnetoelectric effect, and the effect of increasing the magnetoelectric voltage coefficient

Active Publication Date: 2015-04-29
常熟紫金知识产权服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lead Zirconate Titanate Pb(Zr,Ti)O 3 (PZT) series piezoelectric ceramics are piezoelectric materials often used in magnetoelectric composite materials, but the high content of toxic lead Pb and zirconium Zr in PZT is harmful to human body and environment.
[0005]Barium titanate is used as the piezoelectric material, although it can avoid the harm to the environment, but the magnetoelectric effect of the magnetoelectric composite material is low

Method used

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  • Piezoelectric material and magnetoelectric composite
  • Piezoelectric material and magnetoelectric composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Piezoelectric material preparation:

[0022] 1. Preparation of precursor powder by sol-gel method: prepare 0.5% mol chromium (Cr) doped barium titanate (BaTiO3) precursor powder. The raw material used is barium carbonate (BaCO 3 ), titanium dioxide (TiO 2 ), chromium trioxide (Cr 2 o 3 ) and citric acid CIT (C 6 h 8 o 7 ·H 2 O). The molar ratio of barium carbonate, titanium dioxide, chromium trioxide and citric acid is 1:0.995:0.0025:3.2. After fully stirring the raw materials in distilled water, place them on a heating magnetic stirrer, heat and stir for several hours, until the solution in the beaker becomes a uniformly fused translucent liquid. Place the beaker in a drying oven and dry it for several hours until the water is completely evaporated into a solid state. The solid material was ground into fine powder, and placed in a muffle furnace for pre-sintering at 400°C for 6 hours to obtain the desired precursor powder of 0.5% molCr doped barium titanate. ...

Embodiment 2

[0028] Piezoelectric material preparation:

[0029] 1. Preparation of precursor powder by sol-gel method: the raw material used is barium carbonate (BaCO 3 ), titanium dioxide (TiO 2 ), chromium trioxide (Cr 2 o 3 ) and citric acid CIT (C 6 h 8 o 7 ·H 2 O). The molar ratio of barium carbonate, titanium dioxide, chromium trioxide and citric acid is 1:0.99:0.005:3.2. After fully stirring the raw materials in distilled water, place them on a heating magnetic stirrer, heat and stir for several hours, until the solution in the beaker becomes a uniformly fused translucent liquid. Place the beaker in a drying oven and dry it for several hours until the water is completely evaporated into a solid state. The solid material was ground into fine powder, and placed in a muffle furnace for pre-sintering at 450° C. for 6.5 hours to obtain the desired precursor powder of 1.0% molCr doped barium titanate.

[0030]2. Tablet pressing and sintering: Press the powder on a tablet press. ...

Embodiment 3

[0037] Piezoelectric material preparation:

[0038] 1. Preparation of precursor powder by sol-gel method: the raw material used is barium carbonate (BaCO 3 ), titanium dioxide (TiO 2 ) and chromium trioxide (Cr 2 o 3 ) and complexing agent citric acid CIT (C 6 h 8 o 7 ·H 2 O). The molar ratio of barium carbonate, titanium dioxide, chromium trioxide and citric acid is 1:0.985:0.0075:3. After fully stirring the raw materials in distilled water, place them on a heating magnetic stirrer, heat and stir for several hours, until the solution in the beaker becomes a uniformly fused translucent liquid. Place the beaker in a drying oven and dry it for several hours until the water is completely evaporated into a solid state. The solid material was ground into fine powder, and placed in a muffle furnace for pre-calcination at 400°C for 6 hours to obtain the desired precursor powder of 1.5% molCr doped barium titanate.

[0039] 2. Tablet pressing and sintering: Press the powder ...

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Abstract

The invention discloses a piezoelectric material. The piezoelectric material is Cr-doped BaTiO3 piezoelectric ceramic, wherein mole ratio of Cr to Ba is (1.0-1.5):100. The invention also discloses a magnetoelectric composite. The magnetoelectric composite is prepared by polarizing the Cr-doped BaTiO3 piezoelectric ceramic material and then bonding the polarized Cr-doped BaTiO3 piezoelectric ceramic material with a magnetostriction material. The magnetoelectric composite prepared by the invention is an environment-friendly material absolutely harmless to the environment and has stronger magnetoelectric effect in high frequency environment.

Description

technical field [0001] The invention relates to a piezoelectric material and a magnetoelectric composite material, in particular to a chromium-doped barium titanate series piezoelectric material and an environment-friendly magnetoelectric composite material using the piezoelectric material. Background technique [0002] The magnetoelectric effect is the dielectric polarization of the magnetoelectric composite material under the action of an external magnetic field, or the magnetization under the action of an external electric field. Magnetoelectric material can realize the conversion between magnetic field and electric field. It is an important functional material and has broad application prospects in high-performance magnetoelectric devices. Detection, broadband magnetic detection and other fields. Compared with traditional dielectric materials or magnetic materials, magnetoelectric composite materials have the advantages of high energy conversion efficiency, accurate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/468C04B35/624H01L41/187H01L43/10
Inventor 曹鸿霞
Owner 常熟紫金知识产权服务有限公司
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