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Synthetic method and equipment of magnetic liquid taking carbon coated metal nano particles as magnetic carriers

A technology of metal nanoparticles and magnetic liquids, applied in the direction of magnetic liquids, etc., can solve the problems of prone to oxidative deterioration, poor chemical stability, and the decline of magnetic properties of magnetic liquids, so as to broaden the application range and application field, and have strong oxidation resistance , The effect of reducing the formation of carbon impurities

Inactive Publication Date: 2010-06-09
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with them, the magnetic properties of metal-based and iron-nitride-based magnetic liquids are much higher, but their chemical stability is poor, and they are prone to oxidative deterioration, resulting in a decline in the magnetic properties of magnetic liquids.

Method used

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  • Synthetic method and equipment of magnetic liquid taking carbon coated metal nano particles as magnetic carriers
  • Synthetic method and equipment of magnetic liquid taking carbon coated metal nano particles as magnetic carriers
  • Synthetic method and equipment of magnetic liquid taking carbon coated metal nano particles as magnetic carriers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: the preparation method of magnetic liquid, comprises three main processes: the one, utilize the tungsten electric arc method to carry out the preparation of carbon-coated metal nano-magnetic particle; The third is to uniformly disperse the carbon-coated metal nano-magnetic particles into the base liquid with the help of suitable surfactants and dispersion means to synthesize a stable magnetic liquid; the specific process steps are:

[0032] (1) The described tungsten arc method carries out the preparation of carbon-coated metal nano-magnetic particles, the soft magnetic metal raw material is placed in the graphite crucible in the reaction chamber, the reaction chamber is evacuated and fully gas-washed with an inert gas, with a certain The flow rate is to fill the reaction chamber with hydrocarbon gas and inert gas. The hydrocarbon gas is the reaction gas and the inert gas is the carrier gas. At the same time, turn on the vacuum pump and adjust the opening o...

Embodiment 2

[0046] Embodiment 2: The soft magnetic metal raw material is a transition metal, which is cobalt. The hydrocarbon gas is a gas that is easy to generate carbon atoms by catalytic cracking, which is C 2 h 4 . The strong acidic solution used during the pickling treatment is concentrated sulfuric acid. The easily dispersible and volatile organic solvent is tetrachloroethylene. The surfactant used was oleate.

[0047] Others are the same as in Example 1.

Embodiment 3

[0048] Embodiment 3: The soft magnetic metal raw material is a transition metal, which is nickel. The hydrocarbon gas is a gas that is easy to generate carbon atoms by catalytic cracking, which is C 3 h 6 . The strong acidic solution used during the pickling treatment is concentrated nitric acid. The easily dispersible and volatile organic solvent is toluene. The surfactant used was T151.

[0049] Others are the same as in Example 1.

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Abstract

The invention discloses synthetic method and equipment of a magnetic liquid taking carbon coated metal nano particles as magnetic carriers, belonging to a preparation method and equipment of the magnetic liquid. The preparation method of the magnetic liquid comprises three main processes of: preparing carbon coated metal nano magnetic particles by using a tungsten arc method; purifying the carbon coated metal nano magnetic particles by using a pickling and magnetic separation method; and uniformly dispersing the carbon coated metal nano magnetic particles to a base liquid by using a proper surface active agent and a dispersing mode for synthesizing a stable magnetic liquid. The invention has the advantages of simple method and equipment, and easy control of technological process; and the nano magnetic particles of different metals can be prepared only by changing raw materials. The synthetic magnetic liquid has strong inoxidability and high magnetic performance and can meet the utilization requirement of special occasions of corrosive environments and the like.

Description

technical field [0001] The invention relates to a manufacturing method and equipment of a magnetic liquid, in particular to a method and equipment for synthesizing a magnetic liquid in which carbon-coated metal nanoparticles are magnetic carriers. Background technique [0002] Magnetic fluid, also known as magnetic fluid or ferrofluid, is a stable "solid-liquid" two-phase formed by uniformly dispersing nano-scale magnetic particles in a liquid carrier through a surfactant. colloidal suspension. The magnetic liquid not only maintains the fluidity of the base liquid, but also can be rapidly magnetized under the action of an external magnetic field. When the external magnetic field is canceled, the magnetism can disappear immediately, showing excellent superparamagnetism, and is an ideal liquid magnetic material. . [0003] The magnetic properties of magnetic liquid mainly depend on the magnetic properties of the magnetic carriers contained in it, that is, the magnetic proper...

Claims

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Application Information

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IPC IPC(8): H01F1/44B22F1/02
Inventor 刘同冈杨志伊刘书进候友夫吴健钱子航
Owner CHINA UNIV OF MINING & TECH
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