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Piezoelectric material

A technology of piezoelectric materials and magnetoelectric composite materials, applied in the field of barium titanate piezoelectric materials and piezoelectric materials, can solve the problems of low magnetoelectric effect, harm to human body and environment, etc., and achieve strong magnetoelectric effect , strong resonant magnetoelectric effect, and the effect of improving the magnetoelectric voltage coefficient

Inactive Publication Date: 2015-04-29
王佳栋 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lead zirconate titanate Pb(Zr,Ti)03(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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Piezoelectric material preparation:

[0022] 1. Preparation of precursor powder by sol-gel method: preparation of 0.5% mol chromium (Cr) doped barium titanate (BaTiO 3 ) 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% moICr-doped bariu...

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 meat 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% moICr-doped barium titanate.

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

Embodiment 3

[0035] Piezoelectric material preparation:

[0036] 1. Preparation of precursor powder by sol-gel method: the raw material used is barium carbonate (BaCO 3 ), titanium dichloride (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-sintering at 400° C. for 6 hours to obtain the desired precursor powder of 1.5% moICr-doped barium titanate.

[0037] 2. Tablet pressing and sintering: Press the powd...

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Abstract

The invention discloses a piezoelectric material which is barium titanate (BaTiO) piezoelectric ceramic doped with chromium (Cr). The molar ratio of Cr to Ba is (1.0-1.5):100. The invention also discloses a magneto-electric composite which is prepared by polarizing the barium titanate piezoelectric ceramic material doped with chromium and then bonding the polarized materials with magnetostriction materials. The magneto-electric composite prepared by the invention is environment-friendly and non-hazardous and has a stronger magneto-electric effect.

Description

technical field [0001] The invention relates to a piezoelectric material, in particular to a barium titanate piezoelectric material doped with chromium element and 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 measurement, low manufacturing cost, and high integration. Therefore, the development of magnetoelectr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/468C04B35/622
Inventor 王佳栋颜永松
Owner 王佳栋
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