Method for manufacturing nanometer iron

A manufacturing method and nano-iron technology are applied in the field of radiation chemical manufacturing of nano-materials to achieve the effects of uniform particle size, simple process and short production cycle

Inactive Publication Date: 2005-06-29
SHANGHAI UNIV
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  • Abstract
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Problems solved by technology

[0004] Using radiation chemical method to prepare nanomaterials, the method widely used at present is γ-ray radi...

Method used

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Experimental program
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Embodiment 1

[0017] Embodiment one: the specific process steps of the present embodiment are as follows:

[0018] a. First, weigh a certain amount of iron sulfate with FA1004 dish electronic balance, dissolve it in distilled water, and make the concentration of solution iron ion reach 0.015mol / 100ml;

[0019] b. Then add hydrophilic surfactant polyvinyl alcohol PVA, the concentration is 0.8g / 100ml;

[0020] c. add isopropanol IPA again as the scavenger of oxidative free radical OH, concentration is 30ml / 100ml, and add ammoniacal liquor, forms ferric hydroxide colloidal solution;

[0021] d. Put the above-mentioned prepared solution into the irradiation container, fill with nitrogen to get rid of the oxygen in the solution, and then seal the irradiation container;

[0022] e. Using a high-frequency and high-voltage industrial electron accelerator, irradiate with a radiation dose of 400-500KGy under the working range of 2.0MeV and 10mA denamitron electron accelerator;

[0023] f. The irrad...

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Abstract

The invention relates to an iron super-micro particle preparation technique, belongs to radiation chemical nanometer material production technique. The technique of the invention is that: nanometer material preparation: obtain iron hydroxide colloid solution by using iron sulfate as raw material and ammonia liquor as precipitant; control the crystal core accumulating speed and the particle size by hydrophilic surface-activator polyvinyl alcohol with isopropyl alcohol as free radical scavenger and in radiation chemistry principles; develop the radiation chemical reaction by the bunch of electrons generated by industrial electron accelerator; the radiated solution produces nanometer triple iron quadoxide which deoxidated with high purity hydrogen to obtain nanometer iron powder. The advantages of the invention are that: simple technical processes, short production cycle, non-pollution, the obtained particles are of uniform diameter and finely divided. The nanometer iron produced in above ways is of higher satiating hard magnetism and coercive force which is applicable on high intensity magnetic recording material..

Description

technical field [0001] The invention relates to a method for preparing iron ultrafine particles, which belongs to the field of radiation chemistry manufacturing nanometer materials. Background technique [0002] In recent years, due to the broad prospect of magnetic nanoparticles in the practical application of reagents, the research on the preparation method and properties of magnetic nanoparticles has received great attention. In terms of magnetic recording materials, magnetic nanoparticles are expected to replace traditional micron-sized magnetic powders. , used for high-density magnetic recording materials; in the biological field, using it as a carrier to make a guiding agent can make the drug gather in the local part of the body under the action of an external magnetic field, so as to perform high-concentration drug treatment on the pathological location, especially suitable for Cancer, tuberculosis and other diseases with fixed lesions. [0003] Synthesize nano-magne...

Claims

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Application Information

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IPC IPC(8): B22F9/16
Inventor 周瑞敏何林锋
Owner SHANGHAI UNIV
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