CN101100314A - Method for preparing gamma-Fe2O3 nano magnetic material - Google Patents
Method for preparing gamma-Fe2O3 nano magnetic material Download PDFInfo
- Publication number
- CN101100314A CN101100314A CNA200710041853XA CN200710041853A CN101100314A CN 101100314 A CN101100314 A CN 101100314A CN A200710041853X A CNA200710041853X A CN A200710041853XA CN 200710041853 A CN200710041853 A CN 200710041853A CN 101100314 A CN101100314 A CN 101100314A
- Authority
- CN
- China
- Prior art keywords
- magnetic material
- urea
- ammonium oxalate
- iron nitrate
- aqueous solution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
This invention discloses a method for preparing gamma-Fe203 nanometer magnetic material. The procedures are: ferrous nitrate and urea, ammonium oxalate solution are heated under 130-170deg.C for 4-9hrs, and then fed in a preheated environment of 300-600deg.C for 10-30minites, so obtaining this inventive gammer-fe203 nanometer powder. This invention has advantages of: simple process, safety, no need of protective atmosphere, short reaction time (10-30 minites), energy-saving, low cost of raw material, high yield, high pureness, definitive constituents and crystal-form, excellent magnetic property.
Description
Technical field
The present invention relates to a kind of γ of preparation-Fe
2O
3The method of nano magnetic material.
Background technology
γ-Fe
2O
3It is very widely functional material of a kind of application.Owing to have good magnetic, catalysis and air-sensitive performance and absorption and the shielding effect good to ultraviolet ray, it is used as magnetic recording material, magnetic liquid, electromagnetic wave absorbent material, gas sensor, catalyzer, nonlinear optical material, all has a good application prospect in fields such as electronics, petrochemical complex, environmental protection and biological medicine engineerings.
Present γ-Fe
2O
3Preparation become the focus of people research.Preparation γ-Fe
2O
3The most frequently used method of nano powder is liquid-phase precipitation method, obtains γ-Fe through steps such as precipitating, dewater, reduce, reoxidize
2O
3This method complex process yields poorly, and the quality of products obtained therefrom is still waiting to improve.
Recently the preparation method of development also has sol-gel method, laser vapor phase method, pyrolysis method, microemulsion method, high-energy ball milling method, sputtering method, vapour deposition process, solid phase method etc.These methods have exists complicated operation, process to be difficult to control, quality product is difficult to guarantee, what have exists weak points such as facility investment is big, processing condition are harsh, productive rate is lower, be difficult to apply.
Preparation γ-the Fe that therefore explore that a kind of simple to operate, process is easy to control, output height, product quality can be guaranteed and have certain prospects for commercial application
2O
3Method, be the target that researcher is pursued.
Summary of the invention
The objective of the invention is to propose a kind of γ of preparation-Fe
2O
3The method of nano magnetic material to overcome existing preparation method's deficiency, satisfies the needs of practical application.
Method of the present invention comprises the steps:
With the aqueous solution of ferric nitrate, urea and ammonium oxalate, at 130～170 ℃, preferred 150 ℃ of lower heating 4-9h place the environment that is warming up in advance 300-600 ℃ to react then 10-30 minute, can obtain γ-Fe
2O
3Nano powder;
In the said aqueous solution, the molar weight of urea is 3-8 a times of iron nitrate mole, and the molar weight of said ammonium oxalate is 3-6 a times of iron nitrate mole, and in the aqueous solution, the content of iron nitrate is 1.00～1.35g/ml;
The product that adopts above-mentioned steps to obtain, more loose, by the pattern of transmission electron microscope and scanning electron microscopic observation product, laminar structured for the nano particle Adhesion formation, the average grain diameter of particle is 30-40nm, the crystalline phase of product consists of γ-Fe
2O
3(JCPDS No.39-1364), saturation magnetization is 45～55emu/g.
The present invention adopts firing method to synthesize fast γ-Fe
2O
3Nano powder; this method technology simple, safe and reliable (air atmosphere need not special atmosphere protection), reaction time short (10-30 minute), energy savings, raw material are cheap, product output height and products therefrom purity height, component and crystal formation are determined, magnetic property is good.
Description of drawings
Fig. 1 obtains the x-ray diffraction pattern of product for embodiment 1.
Embodiment
Embodiment 1
Take by weighing the 8.08g iron nitrate, 4.0g urea, the 10.0g ammonium oxalate adds the 7.0ml deionized water.Put into baking oven after fully stirring 30min, obtain the mixture of thickness at 150 ℃ of lower baking 5h.
Said mixture is poured in the crucible, put into the retort furnace that is warmed up to 400 ℃ in advance and reacted 15 minutes, can obtain final product.Product is the laminar structured of nano particle composition, and crystallinity is good, and saturation magnetization is 49emu/g.The crystalline phase of product is formed as shown in Figure 1.
Take by weighing the 8.08g iron nitrate, 5.0g urea, the 15.0g ammonium oxalate adds the 8.0ml deionized water.Put into baking oven after fully stirring 30min, obtain the mixture of thickness at 130 ℃ of lower baking 7h.Said mixture is poured in the crucible, put into the retort furnace that is warmed up to 500 ℃ in advance and reacted 10 minutes, can obtain final product.Product is the laminar structured of nano particle composition, and crystallinity is good, and saturation magnetization is 48emu/g.
Embodiment 3
Take by weighing the 8.08g iron nitrate, 7.0g urea, the 16.0g ammonium oxalate adds the 11.0ml deionized water.Put into baking oven after fully stirring 30min, obtain the mixture of thickness at 170 ℃ of lower baking 5h.Said mixture is poured in the crucible, put into the retort furnace that is warmed up to 400 ℃ in advance and reacted 25 minutes, can obtain final product.Product is the laminar structured of nano particle composition, and crystallinity is good, and saturation magnetization is 50emu/g.
Embodiment 4
Take by weighing the 8.08g iron nitrate, 4.5g urea, the 13.5g ammonium oxalate adds the 8.0ml deionized water.Put into baking oven after fully stirring 30min, obtain the mixture of thickness at 150 ℃ of lower baking 6h.Said mixture is poured in the crucible, put into the retort furnace that is warmed up to 600 ℃ in advance and reacted 10 minutes, can obtain final product.Product is the laminar structured of nano particle composition, and crystallinity is good, and saturation magnetization is 45emu/g.
Claims (4)
1. one kind prepares γ-Fe
2O
3The method of nano magnetic material is characterized in that, comprises the steps: the aqueous solution with ferric nitrate, urea and ammonium oxalate, at 130～170 ℃ of lower heating 4-9h, places then the environment that is warming up in advance 300-600 ℃ to react 10-30 minute, can obtain γ-Fe
2O
3Nano powder.
2. method according to claim 1 is characterized in that, heats 4-9h down at 150 ℃.
3. method according to claim 1 is characterized in that, in the said aqueous solution, the molar weight of urea is 3-8 a times of iron nitrate mole, the molar weight of said ammonium oxalate is 3-6 a times of iron nitrate mole, and in the aqueous solution, the content of iron nitrate is 1.00～1.35g/ml.
4. according to claim 1,2 or 3 described methods, it is characterized in that the crystalline phase of product consists of γ-Fe
2O
3(JCPDS No.39-1364), saturation magnetization is 45～55emu/g.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200710041853XA CN100522823C (en) | 2007-06-11 | 2007-06-11 | Method for preparing gamma-Fe2O3 nano magnetic material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200710041853XA CN100522823C (en) | 2007-06-11 | 2007-06-11 | Method for preparing gamma-Fe2O3 nano magnetic material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101100314A true CN101100314A (en) | 2008-01-09 |
| CN100522823C CN100522823C (en) | 2009-08-05 |
Family
ID=39034798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200710041853XA Expired - Fee Related CN100522823C (en) | 2007-06-11 | 2007-06-11 | Method for preparing gamma-Fe2O3 nano magnetic material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100522823C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149354A (en) * | 2013-01-29 | 2013-06-12 | 南昌大学 | Fast detecting method for food-borne pathogenic bacteria based on gamma-Fe2O3 mano-material immune magnetic separation |
| CN105948132A (en) * | 2016-05-06 | 2016-09-21 | 上海应用技术学院 | Preparation method of three-dimensional gamma-Fe2O3 nano material and application thereof |
| CN106430331A (en) * | 2016-09-19 | 2017-02-22 | 青岛鼎元磁材有限公司 | Preparation method of high-coercivity, high-remanence and anti-fake magnetic powder |
| CN108807882A (en) * | 2018-05-24 | 2018-11-13 | 江西师范大学 | A kind of Fe with porous octahedral structure2O3/Fe3O4The preparation method of@C/G composite materials |
-
2007
- 2007-06-11 CN CNB200710041853XA patent/CN100522823C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149354A (en) * | 2013-01-29 | 2013-06-12 | 南昌大学 | Fast detecting method for food-borne pathogenic bacteria based on gamma-Fe2O3 mano-material immune magnetic separation |
| CN105948132A (en) * | 2016-05-06 | 2016-09-21 | 上海应用技术学院 | Preparation method of three-dimensional gamma-Fe2O3 nano material and application thereof |
| CN105948132B (en) * | 2016-05-06 | 2017-05-17 | 上海应用技术学院 | Preparation method of three-dimensional gamma-Fe2O3 nano material and application thereof |
| CN106430331A (en) * | 2016-09-19 | 2017-02-22 | 青岛鼎元磁材有限公司 | Preparation method of high-coercivity, high-remanence and anti-fake magnetic powder |
| CN108807882A (en) * | 2018-05-24 | 2018-11-13 | 江西师范大学 | A kind of Fe with porous octahedral structure2O3/Fe3O4The preparation method of@C/G composite materials |
| CN108807882B (en) * | 2018-05-24 | 2022-04-26 | 江西师范大学 | Fe with porous octahedral structure2O3/Fe3O4Preparation method of @ C/G composite material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100522823C (en) | 2009-08-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Yang et al. | Mechanochemical synthesis of cobalt oxide nanoparticles | |
| Zhang et al. | Facile synthesis, formation mechanism and thermochromic properties of W-doped VO 2 (M) nanoparticles for smart window applications | |
| Tan et al. | Controllable microwave hydrothermal synthesis of bismuth ferrites and photocatalytic characterization | |
| Murugan et al. | Synthesis of nanocrystalline anatase TiO2 by microwave hydrothermal method | |
| Yang et al. | Formation of NiFe2O4 nanoparticles by mechanochemical reaction | |
| Lee et al. | Microwave-hydrothermal versus conventional hydrothermal preparation of Ni-and Zn-ferrite powders | |
| Chandrappa et al. | A hybrid electrochemical–thermal method for the preparation of large ZnO nanoparticles | |
| Kępiński et al. | Hydrothermal synthesis of precursors of neodymium oxide nanoparticles | |
| CN100522823C (en) | Method for preparing gamma-Fe2O3 nano magnetic material | |
| CN101318709B (en) | Method for preparing nano-gamma-Fe2O3 hollow magnetic microsphere | |
| CN102826605B (en) | Preparation method for chromium oxide nanometer materials | |
| CN104328301B (en) | A kind of preparation method of particle-reinforced molybdenum-base composite material | |
| Hirano et al. | Synthesis of highly crystalline hexagonal cesium tungsten bronze nanoparticles by flame-assisted spray pyrolysis | |
| CN105502503A (en) | Hexagonal crystal tungsten bronze short rod nanoparticles and preparation method thereof | |
| Yu et al. | Synthesis of Au/SnO2 core–shell structure nanoparticles by a microwave-assisted method and their optical properties | |
| Su et al. | Synthesis of spherical Cr2O3 nanoparticles by a microwave refluxing method and their photocatalytic properties | |
| Pei et al. | Controlled synthesis of large-sized Cr2O3 via hydrothermal reduction | |
| CN109319838A (en) | A kind of preparation method of rutile phase hypovanadic oxide ultra-fine nano-powder | |
| Rafique et al. | Synthesis methods of nanostructures | |
| Moghaddam et al. | Controlled microwave-assisted synthesis of ZnFe2O4 nanoparticles and their catalytic activity for O-acylation of alcohol and phenol in acetic anhydride | |
| CN113443650B (en) | Method for preparing nano titanate by utilizing self-release of crystal water | |
| CN102320659B (en) | Method for synthesizing lanthanum-vanadate nano material by adopting microwave-radiation method | |
| CN109817838A (en) | The preparation method and QLED device of sull | |
| Tao et al. | Physicochemical study of the sustainable preparation of nano-Fe2O3 from ferrous sulfate with coke | |
| Xu et al. | Synthesis of tin-doped indium oxide nanoparticles by an ion-exchange and hydrothermal process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090805 Termination date: 20190611 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |