Electrical Materials

Applications of Insulating Materials Insulating fluids (gases and liquids) provide insulation between phases and between phase and grounded parts of electrical equipment. These also carry out heat from the windings of the electrical equipment. However, solid insulating materials are used only to provide insulation. While describing the dielectric and other properties of various insulating materials, […]

Properties of Insulating Materials The main requirements of the insulating materials used for power apparatus are:  Vulcanized Rubber   Rubber in its natural form is highly insulating but it absorbs moisture readily and gets oxidized into a resinous material; thereby it loses insulating properties. When it is mixed with sulfur along with other carefully chosen ingredients

Dia Para Ferro Magnetic Materials Diamagnetic Materials   These materials are feebly repelled by a magnet. When placed in a magnetizing field, they are feebly magnetized in a direction opposite to that of the field. Thus, the susceptibility of diamagnetic material is small and negative.   Further, the flux density in a diamagnetic material placed

High resistivity materials are used for making resistance elements for heating devices, starters for electric motors, resistances used in precision measuring instruments, loading resistances and rheostats and filaments for incandescent lamps. High resistivity materials are used in all such applications where a large value of resistance is required. If low resistivity materials were used for such

Properties and Applications of Soft Magnetic Materials  Materials which have a steeply rising magnetization curve, relatively small and narrow hysteresis loop and consequently small energy losses for each cycle of magnetization are called soft magnetic materials. Soft magnetic materials are, therefore, employed in building cores for use in alternating magnetic fields. The commonest soft magnetic materials

Ferromagnetic materials have a crystal structure which means that they are made up of crystals. Every crystal of a ferromagnetic substance has a particular direction along which it offers high permeability and is, therefore, most easily magnetized. Such axes, along which the crystals have high permeability and are more easily magnetized, are called the “preferred”

Hi friends, In this article, I am discussing the “Creep in materials.” Types of creep and creep strength. So let us start. Metals will deform under steady service loads less than the short-time elastic strength if the loads are applied for a very long time at temperatures near the crystallization temperature. Apparently, the atoms tend

Hi friends,   In this article, am discussing the properties of superconductors and the applications of superconductors. This article will provide you sufficient information about superconductors.   The resistivity of most metals increases with increase in temperature and vice-versa. There are some metals and chemical compounds whose resistivity becomes zero when their temperature is brought

Normally, no current flows through insulators or dielectric materials. However, when the voltage applied to such materials exceeds a certain value, then it breaks down and a heavy electric current (much larger than the usual leakage current) flows through it. If the insulator is a solid medium, it gets punctured or destroyed. Dielectric Strength Definition