Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for improving magneto-electric effect of composite materials

A composite material, magnetoelectric effect technology, applied in chemical instruments and methods, manufacturing/assembly of magnetostrictive devices, and manufacturing/assembly of piezoelectric/electrostrictive devices, etc., can solve problems such as inability to meet practical applications

Inactive Publication Date: 2006-07-19
NANJING UNIV
View PDF1 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Single-phase materials rarely have such characteristics, and only have magnetoelectric effects at low temperatures, which cannot meet the needs of practical applications at all.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for improving magneto-electric effect of composite materials
  • Method for improving magneto-electric effect of composite materials
  • Method for improving magneto-electric effect of composite materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] Such as figure 1 Shown, the object of main application research of the present invention is composite material, and this composite material is made of magnetostrictive material Terfenol-D and piezoelectric material LiNbO 3 Interlayer coupled 2-2 type composites composed of single crystals. Its magnetoelectric coupling is realized through the "product effect" of the magnetostrictive effect and the piezoelectric effect under the synergy of the phase interface, that is, the coupling of magnetism-force and force-electricity. The process can be visualized as: Magnetoele ctric = electric mechanical × mechanical magnetic , Thus we obtain the important characterization parameter of the magnetoelectric coupling effect, namely the magnetoelectric coupling coefficient, α H = ( ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method for improving the magnetoelectric effect of composite material, which prepares the magnetic deformation and the piezoelectric material into sheet composite material while they are adhered. It designs the cutting shape of piezoelectric single crystal according to the vibration mode of magnetic deformation material under the direct current bias magnetic field and alternating excited magnetic field, to make the cut piezoelectric single crystal attain high piezoelectric output under the strain effect processed by the magnetic deformation material; selecting the cutting shape of standard cut piezoelectric single crystal to attain the maximum piezoelectric factors of crystal; processing coordinate transformation on the piezoelectric tensor matrix of standard piezoelectric single crystal to make the piezoelectric factor integrated valve used in the new cut piezoelectric factor matrix reach maximum, and the new cut piezoelectric single crystal attain maximum piezoelectric output at needed direction to attain the maximum magnetoelectric effect.

Description

1. Technical field [0001] The invention relates to a design method and application for improving the magnetoelectric effect of a composite material, which mainly improves the magnetoelectric output by designing a new cut type of piezoelectric single crystal material in the magnetoelectric composite material. 2. Background technology [0002] The magnetoelectric coupling effect is that when the material is under the condition of an external magnetic field, it can produce electric polarization, or under the condition of an electric field, there is a phenomenon of magnetization. In 1894, Curie predicted the existence of magnetoelectric effect based on the consideration of crystal symmetry, but it was not until 1958 that Landau and Lifshitz confirmed the existence of magnetoelectric effect in some crystals. Subsequently, Dzyaloshinskii on the antiferromagnetic Cr 2 o 3 The symmetry of is discussed, it is considered that Cr 2 o 3 It has a magnetoelectric effect and has been v...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H01L41/22B32B37/00H01L41/47
Inventor 朱劲松杨盼赵可尹媛万建国吕笑梅
Owner NANJING UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com