Ferrimagnetism fluid

A magnetic fluid and magnetic ferrite technology, applied in the direction of magnetic liquid, inductor/transformer/magnet manufacturing, electrical components, etc., can solve the problems of uneven particle size, loss, magnetic condensation, etc.
CN1797624AInactive Publication Date: 2006-07-05巨东英 +1
6 Cites 9 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
巨东英
Publication Date
2006-07-05
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
Patent Text Reader

Abstract

The method includes following steps: using chemical coprecipitation method to prepare mixed liquor of ammonia (or sodium hydroxide), bivalent iron salt (manganese, nickel, cobalt etc.) and tervalent iron salt; dropping the mixed liquor to ion exchange water, and keeping pH of solution at 7; mixing round the solution to generate suspending liquid of ferrite; using ultrasonic to coat a layer of surface active agent on surfaces of fine grains evenly; finally, using ultrasonic to disperse fine grains on solvent evenly.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a manufacturing method of magnetic fluid, in particular to a ferrite suitable for application fields such as vacuum, cooling, separation, lubrication, metering, magnetic sensor, damping and devibration, magnetic ink, magnetic fluid engine, compressor, etc. Manufacturing method of magnetic liquid. Background technique

[0002] Magnetic fluid is a colloidal material with superparamagnetic properties, which has both the magnetism of solid magnetic materials and the flow properties of liquids. Since S.Papel in the United States developed this liquid material in 1965, it has a history of 30 years. The main preparation method is to add magnetic microparticles coated with surfactants into the mother liquor to form a stable colloidal system. The basic condition for the preparation of magnetic fluid is that the magnetic particles are small enough so that they exhibit chaotic Brownian motion in the base fluid, so as to ensure long-term...

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
Login to View More