In this article we will discuss about:- 1. Introduction to Magnetic Materials 2. Magnetic Parameters 3. Classification of Magnetic Materials 4. Paramagnetism 5. Diamagnetism 6. Feebly Magnetic Materials 7. Cast and Cermet Permanent Magnets 8. Metal Ceramic Technique of making Magnets 9. Ageing of a Permanent Magnet. Introduction to Magnetic Materials: Magnetic materials are those materials in which a state [...]
For certain applications of soft or non-retentive materials, special alloys and other materials have been developed which, after proper fabrication and heat treatment, have superior properties in certain ranges of magnetisation. Several of these alloys will be described. 1. Nickel-Iron Alloys: i. Nickel: Nickel alloyed with iron in various proportions produces a series of alloys with a wide range of [...]
When magnetic materials are subjected to an alternating flux, two types of losses occur which are: 1. Hysteresis Loss 2. Eddy Current Loss The above losses comprise the total core loss. Type # 1. Hysteresis Loss: Below curie temperature (it is the rising temperature at which the given material ceases to be ferromagnetic, or the falling temperature at which it [...]