Method for preparing nano complex particle for highly conductive and magnetic electro-magnetic screen

A nanocomposite particle and electromagnetic shielding technology, which is applied in the field of functional inorganic materials and nanoscience, can solve the problems of poor conductivity, anti-oxidation and acid and alkali resistance, low saturation magnetization, and poor frequency shielding performance, and achieve magnetic conduction and conduction Excellent performance, improved magnetic performance, and low production cost
CN101462173BInactive Publication Date: 2011-01-12WUHAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
WUHAN UNIV OF TECH
Publication Date
2011-01-12
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method for preparing a nanometer composite particle for electromagnetic shielding. The method for preparing the high electric and magnetic conduction nanometer composite particle for electromagnetic shielding is characterized in that the method comprises the following steps: 1) material selection; 2) ferrite and nickel salt are mixed, added with polyethylene glycol and cyclohexane, then added with water and are stirred and dispersed to obtain a mixed solution; 3) the mixed solution is added with a strong reducer at a temperature of between 25 and 90 DEG C, reacts for 5 to 60 minutes under alkali condition with PH value of between 9 and 13, is cooled to normal temperature, and is washed and dried to obtain FeNi alloy nanometer particles; and 4) the FeNi alloy nanometer particles are added into anhydrous ethyl ethanol, added with a weak reducer, subjected to ultrasonic dispersion for 30 to 60 minutes, then added with a silver ammonia solution, stirred at a temperature of between 25 and 90 DEG C, react for 0.5 to 2 hours, cooled to normal temperature and are washed and dried to obtain the high electric and magnetic conduction nanometer composite particle for electromagnetic shielding. The method has the advantages of simple process, environmental protection, low production cost and high yield; and the product has excellent magnetic and electric conduction performances.
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Description

technical field

[0001] The invention relates to a preparation method of nanocomposite particles for electromagnetic shielding, which belongs to the field of functional inorganic materials and also belongs to the field of nano science and technology. Background technique

[0002] With the rapid development of the electronic industry, especially computers and mobile phones, and the wide application of electronic and electrical equipment, the problem of electromagnetic interference (EMI) is becoming more and more serious. It has become a new pollution and has attracted widespread attention from all over the world. In order to solve the problem of electromagnetic interference (EMI), electromagnetic shielding materials have been developed rapidly. According to Schelkunoff's electromagnetic shielding theory, an ideal electromagnetic shielding material should have high electrical conductivity and magnetic permeability to better realize the reflection loss and absorption loss of ele...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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