Ethyl silicon oil based magnetic liquid and preparation method thereof

A technology of ethyl silicone oil and magnetic liquid, applied in the direction of the solid anode of the discharge tube, the main electrode of the discharge tube, etc., can solve the problems of poor oxidation resistance, poor magnetic properties, poor stability, etc., and achieve low equipment requirements and simple preparation methods , the effect of uniform particle size distribution
CN101225233AInactive Publication Date: 2008-07-23SUN YAT SEN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SUN YAT SEN UNIV
Publication Date
2008-07-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention disclose a preparation method of ethyl silicon oil magnetic liquid, aiming at providing ethyl silicon oil magnetic liquid and the preparation method to overcome the drawbacks of the prior art. The granularity of the magnetic grains is even and the mean grain diameter is 8 to 9 nm without gathering. The ethyl silicon oil magnetic liquid is possessed with a series of special performances of the ethyl silicon oil and good low temperature resistance. The preparation method does not separate out any deposit and can still keep fluid putting at standstill and minus 12 DEG C for one month. The saturation intensity can reach 20.0 emu / g tested by vibrating sample magnetometer. The preparation method of ethyl silicon oil magnetic liquid has the advantages of high magnetism, steady dispersion, simple method and low requirement to the equipments.
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Description

technical field

[0001] The invention relates to surface modification and dispersion technology of nano powder, in particular to an ethyl silicone oil-based Fe 3 o 4 Magnetic liquid and method for its preparation. Background technique

[0002] The so-called magnetic liquid is a uniform and stable colloidal solution formed by highly dispersing nano-scale ultrafine magnetic particles treated with surfactants in the base liquid, so it has both magnetism and fluidity at the same time, and it has special physical properties , chemical properties and fluid properties, mainly composed of nano-magnetic particles, surface modifiers and carrier liquid. Its process technology can be described by the following points:

[0003] 1. Selection and preparation of magnetic nanoparticles:

[0004] Commonly used magnetic materials are divided into three categories, ferrite system, metal system and iron nitride system. Among them, nano Fe 3 o 4 Magnetic particles have the characteristics o...

Claims

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