Method for enhancing magnetism of bismuth ferrite nano powder based on size effect

A nano-powder and size-effect technology, which is applied in nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve the problems of weak ferromagnetism and easy generation of impurities in bismuth ferrite, and achieve enhanced ferromagnetic properties , magnetic enhancement, high purity effect

Active Publication Date: 2019-11-15
HARBIN INST OF TECH
View PDF6 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the two technical problems of weak ferromagnetism and easy generation of impurity phases in the existing single-phase multiferroic material bismuth ferrite

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 enhancing magnetism of bismuth ferrite nano powder based on size effect
  • Method for enhancing magnetism of bismuth ferrite nano powder based on size effect
  • Method for enhancing magnetism of bismuth ferrite nano powder based on size effect

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: A kind of method for strengthening the magnetism of bismuth ferrite nanopowder based on the size effect in the present embodiment is carried out according to the following steps:

[0030] Step 1, add 125mL ethylene glycol monomethyl ether (CH 3 OCH 2 CH 2 0.05mol bismuth nitrate pentahydrate (Bi(NO 3 ) 3 ·5H 2 O) and 0.05mol of iron nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 0), after finishing, dropwise adding 125 μ L concentration is the dilute nitric acid of 0.1mol / L, makes the pH value of solution in the scope of 3~4;

[0031] Step 2, continue to stir, add the monohydrate citric acid (C 6 h 8 o 7 ·H 2 (2), stir well, and citric acid is used as complexing agent, makes metal ion form complex compound, then adds 62.5mL ethylene glycol (dispersant), stirs;

[0032] Step 3, then place it in a water bath at 60°C for 1 hour with magnetic stirring at a stirring speed of 550r / min, and then place it in a blast drying oven at 100°C for 10 hours to obtain a...

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

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
Login to view more

Abstract

The invention discloses a method for enhancing magnetism of bismuth ferrite nano powder based on the size effect, and belongs to the technical field of multiferroic materials / magneto-electric couplingmaterials. The method aims to solve the two technical problems that an existing single-phase multiferroic material bismuth ferrite easily generates an impurity phase and the ferromagnetism is low. The method includes the following steps that 1, bismuth nitrate pentahydrate and ferric sulfate nonahydrate are sequentially added into ethylene glycol monomethyl ether under the stirring condition, andafter addition, dilute nitric acid is dropwise added until the pH value is 3-4; 2, stirring continues, citric acid monohydrate is added, and after uniform stirring, ethylene glycol is added and evenly stirred; 3, the mixture is put into a water bath for magnetic stirring and then dried; 4, two-stage heat preservation is conducted; 5, the mixture is grinded, dilute nitric acid is added, the mixture is cleaned with deionized water after magnetic stirring, the mixture is dried, and BiFeO3 pure-phase nano powder is obtained. According to the method, the ferromagnetic property of bismuth ferrite can be remarkably enhanced.

Description

technical field [0001] The invention belongs to the technical field of multiferroic materials / magnetoelectric coupling materials; in particular, it relates to a method for enhancing the magnetic properties of bismuth ferrite nano-powders based on size effects. Background technique [0002] Since the beginning of the 21st century, multiferroic materials have attracted much attention. They can exhibit significant magnetoelectric coupling, and the magnetism can be controlled by an electric field, and vice versa, the electric polarization can also be controlled by a magnetic field. This characteristic makes multiferroic materials have great potential applications in spintronics, microwave absorption and multi-state memory devices. Of all the multiferroic materials studied so far, bismuth ferrite (BiFeO 3 ) is one of the most attractive multiferroic compounds with Curie temperature and Neel temperature well above room temperature, while exhibiting large electric polarization and...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/00B82Y30/00B82Y40/00
CPCC01G49/0081B82Y30/00B82Y40/00C01P2002/72C01P2004/03C01P2004/64C01P2006/42
Inventor 李均洪杨白晗周忠祥
Owner HARBIN INST OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap