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Hydrothermal preparation method of spinel type ferrite CoFe2O4 nano powder

A spinel-type, nano-powder technology, applied in nanotechnology, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of large size fluctuation range of nano-powder, insufficient electromagnetic properties, and harsh reaction conditions, etc. Achieve the effect of good absorbing performance, excellent crystal form and high degree of crystallization

Pending Publication Date: 2021-02-26
SHANGHAI TITANOS IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Current Ferrite CoFe 2 o 4 The preparation methods of nanopowders include chemical deposition, grinding, high temperature burning, hydrothermal synthesis, etc. These methods all have certain problems, such as complicated operation, harsh reaction conditions, long preparation time, and the obtained nanopowders The size fluctuation range is too large, the crystal form is not good, the electromagnetic properties are not excellent enough, etc.

Method used

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  • Hydrothermal preparation method of spinel type ferrite CoFe2O4 nano powder
  • Hydrothermal preparation method of spinel type ferrite CoFe2O4 nano powder
  • Hydrothermal preparation method of spinel type ferrite CoFe2O4 nano powder

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Adopt the following hydrothermal preparation method according to the application to prepare spinel ferrite CoFe 2 o 4 Nano powder:

[0049] (1) 0.35mol (101.87g) of cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O) and 0.70mol (169.30g) of iron nitrate (Fe(NO 3 ) 3 ) is dissolved in deionization to make a solution with a cobalt nitrate concentration of 0.35mol / L and an iron nitrate concentration of 0.70mol / L;

[0050] (2) Add 420 g of ethanolamine dropwise to the solution prepared in step (1) and stir at 150 rpm to obtain 107.5 g of precipitate, which is centrifugally washed twice with deionized water and dried in the air;

[0051] (3) 100g of the precipitate prepared in step (1), 230g of sodium tartrate, 13g of glycerol, 5.0g of diethylene glycol and 1000g of deionized water were mixed, and stirred at 700rpm for 15 minutes;

[0052] (4) Add the epoxidized soybean oil of 6.0g and the guar gum of 14g in the gain of step (3), fully stir 7 minutes under 400rpm;

[0053] (5) Add...

Embodiment 2

[0057] Adopt the following hydrothermal preparation method according to the application to prepare spinel ferrite CoFe 2 o 4 Nano powder:

[0058] (1) 0.45mol (130.97g) of cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O) and 0.90mol (145.98g) of ferric chloride (FeCl 3 ) is dissolved in deionization to make a solution with a cobalt nitrate concentration of 0.45mol / L and a ferric chloride concentration of 0.90mol / L;

[0059] (2) Add 420 g of ethanolamine dropwise to the solution prepared in step (1) while stirring at 120 rpm to obtain 138.0 g of precipitate, which is centrifuged and washed 3 times with deionized water and dried in the air;

[0060] (3) 100g of the precipitate prepared in step (1), 280g of sodium tartrate, 12g of glycerin, 4.0g of diethylene glycol and 1200g of deionized water were mixed, and stirred at 600rpm for 20 minutes;

[0061] (4) Add the epoxidized soybean oil of 7.5g and the guar gum of 13g in the gain of step (3), fully stir 5 minutes under 500rpm;

[0062...

Embodiment 3

[0066] Adopt the following hydrothermal preparation method according to the application to prepare spinel ferrite CoFe 2 o 4 Nano powder:

[0067] (1) 0.40mol (95.17g) of cobalt chloride (CoCl 2 6(H 2 O)) and 0.80mol (193.49g) of iron nitrate (Fe(NO 3 ) 3 ) is dissolved in the deionized medium to make cobalt chloride concentration is 0.40mol / L and ferric nitrate concentration is the solution of 0.80mol / L;

[0068] (2) Add 400 g of ethanolamine dropwise to the solution prepared in step (1) and stir at 140 rpm to obtain 122.7 g of precipitate, which is centrifuged and washed 3 times with deionized water and dried in the air;

[0069] (3) 100g of the precipitate prepared in step (1), 250g of sodium tartrate, 10g of glycerol, 7.0g of diethylene glycol and 1100g of deionized water were mixed, and stirred at 650rpm for 17 minutes;

[0070] (4) Add the epoxidized soybean oil of 9.0g and the guar gum of 12g in the gain of step (3), fully stir 6 minutes under 450rpm;

[0071] (5...

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Abstract

The invention discloses a hydrothermal preparation method of spinel type ferrite CoFe2O4 nano powder. The method comprises the following steps: (1) dissolving a cobalt salt and an iron salt in deionized water to prepare a solution; (2) dropwise adding ethanolamine into the solution prepared in the step (1) while stirring to obtain a precipitate; (3) mixing and stirring the precipitate prepared inthe step (1), sodium tartrate, glycerol, diethylene glycol and deionized water; (4) adding epoxidized soybean oil and guar gum into a product obtained in the step (3), and fully stirring; and (5) carrying out hydrothermal reaction on the product obtained in the step (4) at 160-175 DEG C for 30-35 minutes. The hydrothermal preparation method is simple, convenient and rapid to operate, and the prepared nano-powder is small in size fluctuation, less in agglomeration, high in crystallization degree, excellent in crystal form and good in wave absorption performance.

Description

technical field [0001] The application relates to the field of hydrothermal synthesis, more specifically, to a spinel-type ferrite CoFe 2 o 4 Hydrothermal preparation method of nanopowder. Background technique [0002] Ferrite, also known as magnetic ceramics, refers to a composite oxide magnetic material composed of iron, oxygen, and other iron or rare earth elements. Most of them belong to semiconductors, and their resistivity is much higher than that of ordinary metal magnetic materials. The advantage of small eddy current loss. [0003] Nanomaterials refer to materials with at least one dimension in the range of 1 to 100 nanometers in three-dimensional space. At this time, the size of the material is already in the transition zone between the atomic cluster and the macroscopic object, so it will show more obvious surface effects. The small size effect and the macroscopic quantum tunneling effect make various physical and chemical properties of materials, such as optic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/00B82Y40/00
CPCC01G51/00B82Y40/00C01P2002/32C01P2006/90
Inventor 王扬宁科成刘奇兵
Owner SHANGHAI TITANOS IND