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Preparation method of rare earth ortho-ferrite nanometer powder

An ortho-ferrite and nano-powder technology is applied in the field of nano-powder preparation to achieve the effects of low energy consumption, rapid reaction and simple preparation process

Inactive Publication Date: 2011-09-07
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But so far there is no relevant report on the preparation of rare earth orthoferrite nanopowders by sol-gel spontaneous combustion method

Method used

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  • Preparation method of rare earth ortho-ferrite nanometer powder
  • Preparation method of rare earth ortho-ferrite nanometer powder

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0031] a) Preparation of Y (NO 3 ) 3 Aqueous solution: weigh 0.03mol of Y 2 o 3 , dissolved in 40ml of nitric acid aqueous solution with a molar concentration of 4.5mol / L;

[0032] b) Preparation of ferric nitrate aqueous solution: weigh 0.03mol of Fe 2 o 3 , dissolved in 40ml of nitric acid aqueous solution with a molar concentration of 4.5mol / L;

[0033] c) preparation of citric acid aqueous solution: weigh 0.36mol of citric acid, dissolve in 72ml of deionized water;

[0034] d) The Y(NO) prepared above 3 ) 3 The aqueous solution, the ferric nitrate aqueous solution and the citric acid aqueous solution are mixed, heated to 80°C, and stirred to form a sol-gel precursor;

[0035] e) Place the obtained sol-gel precursor into a muffle furnace preheated to 600°C for spontaneous combustion synthesis;

[0036] f) Calcining the resulting spontaneous combustion product at 700°C for 3 hours and grinding to obtain YFeO 3 Nano powder.

[0037] figure 1 Is the YFeO that this ...

Embodiment 2

[0040] The difference between this embodiment and embodiment 1 is only in step a):

[0041] a) Preparation of Y (NO 3 ) 3 Aqueous solution: Weigh 0.06mol of Y(NO 3 ) 3 ·6H 2 O was dissolved in 40ml of deionized water.

[0042] The rest of the content is the same as described in Example 1.

[0043] The YFeO that this embodiment makes 3 The XRD diffraction result of the nanopowder is the same as that described in Example 1.

Embodiment 3

[0045] The difference between this embodiment and embodiment 1 is only in step b):

[0046] b) Preparation of ferric nitrate aqueous solution: weigh 0.06mol of Fe(NO 3 ) 3 9H 2 O was dissolved in 40ml of deionized water.

[0047] The rest of the content is the same as described in Example 1.

[0048] The YFeO that this embodiment makes 3 The XRD diffraction result of the nanopowder is the same as that described in Example 1.

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Abstract

The invention discloses a preparation method of rare earth ortho-ferrite nanometer powder. The preparation method is a sol-gel spontaneous combustion method particularly comprising the following steps of: preparing a rare earth metal nitrate or hydrochloride water solution, a ferric nitrate or ferric chloride water solution and a citric acid water solution; mixing the prepared rare earth metal nitrate or hydrochloride water solution, the ferric nitrate or ferric chloride water solution and the citric acid water solution, and heating and stirring to form a sol-gel precursor; placing the obtained sol-gel precursor into a heating furnace at 550-650 DEG C for spontaneous combustion synthesis; and calcining an obtained spontaneous combustion product at 600-800 DEG C for 2-4 hours. The sol-gel spontaneous combustion method has the advantages of low energy consumption, simple preparation process without special equipment, high operability and product purity, suitability for large-scale production, and the like.

Description

technical field [0001] The invention relates to a rare earth orthoferrite (ReFeO 3 ) The preparation method of nano powder, specifically, relates to a method for preparing rare earth orthoferrite nano powder by using a sol-gel spontaneous combustion method, and belongs to the technical field of nano powder preparation. Background technique [0002] Nanotechnology developed with the development of nanomaterial preparation and application research has become one of the current leading technologies. Due to the small size effect, surface effect, quantum size effect, and macroscopic tunneling effect of nanoparticles, they have properties that conventional materials do not have in terms of magnetism, light, and electricity, and provide a wide range of opportunities for the development of high-performance new materials. As an important part of nanotechnology, the preparation of nanopowders constitutes the basis of nanotechnology. Rare earth orthoferrite (ReFeO 3 ) is a composite...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/626C04B35/624
Inventor 武安华申慧徐家跃侍敏丽罗丽庆储耀卿葛增伟
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI