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Ferrite Magnets Chemical Components
Sep 29, 2017

Ferrite Magnets chemical components

The ferrite magnets are subjected to high temperature sintering to obtain a microstructure. The performance of ferrite magnets depends not only on its chemical composition, but also on its microstructure. Different components of the ferrite magnet material can have a variety of different microstructure, is the same component of the ferrite magnet material, because of its different process conditions, the microstructure is not the same. The microstructure of the ferrite magnets is a comprehensive reflection of the factors of raw materials, recipes and their processes. The study of the microstructure of ferrite can help to trace the influence of process, physical and chemical factors, find out the crux of the problem, to improve the ferrite process conditions, improve product quality and develop new varieties Provide evidence. The following focuses on the crystal growth of polycrystalline ferrite, microstructure control and grain-oriented ferrite preparation.

Microstructure of Ferrite Magnets

The ferrite magnets have a lot of microstructure content, and it actually includes the nature of many materials. Usually referred to the microstructure of ferrite magnets, mainly using a variety of microscopic observation, it is also known as M microstructure. The shape and orientation of the phases, the orientation, the orientation or the distribution, the volume ratio of the phases; the size and shape of the phases, Grain boundary structure, composition changes, grain boundary precipitates and so on. For sintered ferrite magnets, it is required to be a single phase (from a chemical point of view), so in the microstructure, the elements worthy of attention are the grain size, shape, grain interface phase structure, and the pores Quantity, shape and distribution.

Microstructure of the determination of the need for specialized equipment, the basic principle is the use of various electromagnetic waves or other particles and substances after the interaction of absorption, emission, polarization and interference phenomena, from which to understand the microstructure of the material. Table lists some of the material structure of the study and its corresponding determination of the content.

Table material structure and its determination method for analysis of content determination method

Phase optical microscopy, electron microscopy, electron diffraction, X - ray diffraction

Phase change microscopy, differential thermal analysis, X - ray diffraction

Morphology of optical microscopy, electron microscopy

Unit, space group electron diffraction, neutron diffraction, X - ray diffraction

Lattice symmetry visible and infrared absorption spectra, X - ray emission and diffraction, resonance method.

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