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Visible light excited fluorescent magnetic powder and preparation method thereof

A fluorescent magnetic powder and visible light technology, applied in organic chemistry and other fields, can solve problems such as ultraviolet radiation, achieve the effects of overcoming fluorescence interference, simple operation, and maintaining health and safety

Inactive Publication Date: 2014-06-25
LANZHOU UNIVERSITY
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0006] The object of the present invention is to provide a kind of visible light, especially the wavelength is 395 nm purple light, the rare earth fluorescent magnetic powder that excites, to overcome existing fluorescent magnetic powder, especially magnetic powder In the field of flaw detection, 365 nm ultraviolet light is used for excitation, which causes problems in ultraviolet radiation to the human body

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  • Visible light excited fluorescent magnetic powder and preparation method thereof
  • Visible light excited fluorescent magnetic powder and preparation method thereof
  • Visible light excited fluorescent magnetic powder and preparation method thereof

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Embodiment Construction

[0016] (1) Disperse 100 parts of commercial magnet powder in 95% ethanol by mass, add 10-20 parts of potassium carbonate and salicylic acid, and stir at room temperature for 10 hours. (2) Suck out the magnetic powder with a magnet, wash it several times with 95% ethanol, and redisperse the magnetic powder in 95% ethanol. (3) Prepare 10-20 parts of Eu(DBM) 3 2H 2 O ethanol solution was added to the magnetic powder system, and under stirring conditions, 2-5 parts of o-phenanthroline were added, and the stirring was continued for 10 hours, and the generated Eu(DBM) 3 The (Phen) complex precipitates on the surface of the magnetic powder. (4) The prepared rare earth fluorescent magnetic powder is sucked out with a magnet and dried to obtain a nanoscale finished product.

[0017] The finished product prepared by the above method has the following properties: figure 1 In the structure shown, the outer periphery of the magnetic powder 1 is a salicylic acid coating 2, and the outer...

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Abstract

The invention relates to magnetic powder capable of generating fluorescence under the visible light excitation condition and a preparation method for the magnetic powder. The visible light excited fluorescent magnetic powder comprises magnet powder such as Fe2O3 powder, wherein the magnet powder is wrapped by salicylic acid; rare earth Eu(DBM)3(Phen) complex is wrapped at the periphery of the salicylic acid; and Eu is europium, DBM is dibenzoyl methane and Phen is phenanthroline. The preparation method for the magnetic powder comprises the following steps: dispersing the Fe2O3 powder into ethanol; adding a proper amount of potassium carbonate and salicylic acid; stirring; washing with ethanol; placing the magnetic powder into Eu(DBM)3.2H2O ethanol solution which is prepared in advance; adding a proper amount of phenanthroline under the stirring condition; and completely stirring to generate Eu(DBM)3(Phen) complex precipitate on the surface layer of the magnetic powder and obtain the finished product.

Description

technical field [0001] The present invention relates to a kind of magnetic powder that can produce fluorescence under the condition of light excitation and its preparation method. The magnetic powder of the present invention includes magnet powder, especially Fe 2 o 3 pink. Background technique [0002] Magnetic particle inspection, as one of the five conventional methods of nondestructive testing, is also a common method for inspecting surface or near-surface defects of ferromagnetic materials. Fluorescent magnetic particle flaw detection is a new technology emerging in the 1990s. At present, in advanced industrial countries, almost all steel structure manufacturing enterprises are using fluorescent magnetic particle flaw detection method. The current preparation of fluorescent magnetic powder is to bond a fluorescent substance (such as fluorescent tartrazine) to ordinary magnetic powder through physical or chemical methods, so that it is easier to observe the existence ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D213/00
Inventor 唐瑜韩帅徐君
Owner LANZHOU UNIVERSITY