A Ferromagnetic Nanoparticle α‑Fe with Iron Defects 2 o 3 and its preparation method

A ferromagnetic, -fe2o3 technology, applied in the field of ferromagnetic nano-α-Fe2O3 and its preparation, can solve the problems of metal defects and other problems, and achieve the effect of low synthesis cost and strong magnetism

Active Publication Date: 2018-01-09
TIANJIN UNIV
View PDF13 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current technical conditions in α-Fe 2 o 3 It is relatively easy to introduce oxygen vacancies, but it is very difficult to introduce metal vacancies, and there is no literature or patent report

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
  • A Ferromagnetic Nanoparticle α‑Fe with Iron Defects <sub>2</sub> o <sub>3</sub> and its preparation method
  • A Ferromagnetic Nanoparticle α‑Fe with Iron Defects <sub>2</sub> o <sub>3</sub> and its preparation method
  • A Ferromagnetic Nanoparticle α‑Fe with Iron Defects <sub>2</sub> o <sub>3</sub> and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0033] Example 1: Mix 1 g of iron acetate, 20.0 g of glycerin and 100 mL of ethanol, and stir to obtain a homogeneous solution that is transferred to an autoclave polytetrafluoro liner. Put the polytetrafluoroethylene liner into the autoclave, seal it, place it in a constant temperature oven, and react in the oven at 120°C for 6.0h. After the reaction is over, the autoclave is quenched. After the autoclave was cooled to room temperature, the hydrothermal precipitate was taken out, and after being centrifuged and washed with ethanol, it was dried. The dried powder was calcined at 700 °C for 2 h in a muffle furnace, and then cooled naturally. The prepared samples showed strong ferromagnetism, the saturation magnetization was 13emu / g, and the coercive force was 1200Oe.

example 2

[0034] Example 2: 3g ferric oxalate, 24.0g glycerin and 200mL ethanol were mixed, and the homogeneous solution obtained by stirring was transferred to an autoclave polytetrafluoro liner. Put the polytetrafluoroethylene liner into the autoclave, seal it and place it in a constant temperature oven, and react in the oven at 100°C for 15.0h. After the reaction is over, the autoclave is quenched. After the autoclave was cooled to room temperature, the hydrothermal precipitate was taken out, and after being centrifuged and washed with ethanol, it was dried. The dried powder was calcined at 600 °C for 4 h in a muffle furnace, and then cooled naturally. The prepared samples showed strong ferromagnetism, the saturation magnetization was 20emu / g, and the coercive force was 1600Oe.

example 3

[0035]Example 3: Mix 0.5 g of ferric citrate, 10.0 g of glycerin and 50 mL of ethanol, and stir to obtain a homogeneous solution that is transferred to an autoclave polytetrafluoro liner. Put the polytetrafluoroethylene liner into the autoclave, seal it and place it in a constant temperature oven, and react in the oven at 180°C for 2.0h. After the reaction is over, the autoclave is quenched. After the autoclave was cooled to room temperature, the hydrothermal precipitate was taken out, and after being centrifuged and washed with ethanol, it was dried. The dried powder was calcined at 400 °C for 8 h in a muffle furnace, and then cooled naturally. The prepared samples showed strong ferromagnetism, the saturation magnetization was 15emu / g, and the coercive force was 1300Oe.

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 discloses a ferromagnetic nano alpha-Fe2O3 with iron defects, and a preparation method thereof. According to the ferromagnetic nano alpha-Fe2O3 with iron defects, the molar ratio of Fe atom to O atom is controlled to be smaller than 1:1.5.

Description

technical field [0001] The invention belongs to the technical field of catalysts, in particular to a ferromagnetic nanometer α-Fe with iron defects 2 o 3 and its preparation method. Background technique [0002] Defects play an important role in the physical and chemical applications of metal oxides. The current techniques for introducing defects into metal oxides mainly include doping, sputtering, and firing. For the preparation of defective metal oxide α-Fe 2 o 3 , the introduction and regulation of its oxygen vacancies have been widely reported at present, and the metal vacancies have not been reported yet due to the difficulty of preparation. [0003] Chen et al. exposed Fe flakes to oxygen plasma and oxidized them to form α-Fe containing oxygen vacancies. 2 o 3 . α-Fe was derived by characterization and calculation 2 o 3 There are two kinds of oxygen defects, and the growth directions of the two kinds of defects are parallel. The formation of this defect is d...

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 Patents(China)
IPC IPC(8): C01G49/06
CPCC01G49/06C01P2002/72C01P2004/04C01P2006/42
Inventor 邹吉军潘伦张香文王莅
Owner TIANJIN UNIV
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