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Hydrothermal preparation method for spinel type ferrite nanopowder

A nano-powder and spinel-type technology, which is applied in the field of hydrothermal preparation, can solve the problems of difficult control conditions, complicated process, high cost, etc., and achieve the effect of uniform size, good dispersion, and simple operation of the preparation process

Inactive Publication Date: 2012-08-29
SHANGHAI TITANOS IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Today, with the rapid development of microelectronics technology, the preparation of spinel ferrite faces new opportunities and challenges due to problems such as complex process, difficult control conditions, high cost, and inability to ensure physical and chemical performance requirements.
[0004] So far, there is no hydrothermal preparation method for preparing spinel ferrite without using strong alkali

Method used

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  • Hydrothermal preparation method for spinel type ferrite nanopowder
  • Hydrothermal preparation method for spinel type ferrite nanopowder
  • Hydrothermal preparation method for spinel type ferrite nanopowder

Examples

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Effect test

Embodiment 1

[0017] Zn(NO 3 ) 2 ·6H 2 O, Fe(NO 3 ) 3 9H 2 O was completely dissolved in deionized water at a molar ratio of 1:2, and a brownish-red, transparent and stable solution was obtained. Then ethanolamine was added dropwise with constant stirring until complete precipitation. The obtained product was centrifuged three times with deionized water. Then add ammonia water, put the mixture into a stainless steel reaction kettle lined with polytetrafluoroethylene, conduct a hydrothermal reaction at 190°C for 6 hours, and centrifuge the product with deionized water for 3 times to obtain nano-ZnFe 2 o 4 .

Embodiment 2

[0019] Zn(NO 3 ) 2 ·6H 2 O, Fe(NO 3 ) 3 9H 2 O was completely dissolved in deionized water at a molar ratio of 1:2, and a brownish-red, transparent and stable solution was obtained. Then ethanolamine was added dropwise with constant stirring until complete precipitation. The obtained product was centrifuged three times with deionized water. Then add ammonia water, put the mixture into a stainless steel reaction kettle lined with polytetrafluoroethylene, conduct a hydrothermal reaction at 200°C for 6 hours, and centrifuge the product with deionized water for 3 times to obtain nano-ZnFe 2 o 4 .

Embodiment 3

[0021] Will Co(NO 3 ) 2 ·6H 2 O, Fe(NO 3 ) 3 9H 2 O was completely dissolved in deionized water at a molar ratio of 1:2, and a brownish-red, transparent and stable solution was obtained. Then ethanolamine was added dropwise with constant stirring until complete precipitation. The obtained product was centrifuged three times with deionized water. Then add ammonia water, put the mixture into a stainless steel reaction kettle lined with polytetrafluoroethylene, conduct a hydrothermal reaction at 190°C for 6 hours, and centrifuge the product with deionized water for 3 times to obtain nano-CoFe 2 o 4 .

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Abstract

The invention relates to a hydrothermal preparation method for spinel type ferrite nanopowder. According to the hydrothermal preparation method, zinc nitrate hexahydrate [Zn(NO3)3 6H2O], cobalt nitrate hexahydrate [Co(NO3)2 6H2O], nickel chloride hexahydrate [NiCl2 6H2O] and iron nitrate nonahydrate [Fe(NO3)3 9H2O)] are selected as raw materials and ammonia water [NH3 H2O] and ethanolamine [C2H7NO] are selected as mineralizing agents. According to the hydrothermal preparation method, the ammonia water and the ethanolamine are used as the mineralizing agents and particles of the prepared material are spherical, uniform in size about a few tens of nanometers and favorable in dispersibility. The hydrothermal preparation method is simple in operation and low in cost and has important significance for spinel type ferrite as an important industrial magnetic material and catalyst with excellent performances, which is widely applied to electronics, communication and chemical industries.

Description

technical field [0001] The invention relates to the hydrothermal preparation of spinel-type ferrite nano-powder, and belongs to the technical field of nano-powder preparation. Background technique [0002] Spinel ferrite (MeFe 2 o 4 , M is the metal ion Co 2+ , Zn 2+ , Mn 2+ , Ni 2+ etc.), as an important class of functional materials, are widely used in electronics, communications and chemical industries. The current devices are developing towards miniaturization, and the requirements for the performance of spinel ferrite are getting higher and higher. The preparation of spinel ferrite materials by traditional ceramic technology can no longer meet the requirements of high-performance materials. The traditional ceramic method requires high temperature and long reaction time, and is accompanied by grinding, which not only consumes a lot of energy, but also easily leads to the generation of impurities. The preparation process of the new spinel ferrite powder requires en...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/626
Inventor 杨涛金政元郭益平刘河洲刘红艳
Owner SHANGHAI TITANOS IND
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