Electrical Engineering Material

1. ELECTRICAL ENGINEERING
MATERIALS
MR. ASIF L. JAMADAR

2. CLASSES OF ENGINEERING MATERIALS
 As electrical engineering point of view, the materials are classified as,
 Conductors
 Resistor Materials
 Insulators or Dielectrics
 Magnetic Materials
 Semiconductors
 Refractory Materials
 Structural Materials 2

3. CLASSES OF ENGINEERING MATERIALS
 From material science, point of view they may be classified under four
broad groups as,
 Metals and Alloys
 Ceramics
 Organic Polymers
 Composite Materials
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4. CLASSIFICATION OF SOLID FROM ELECTRICAL
ENGINEERING POINT OF VIEW
 Conductors of electricity means Electric current carrying materials
 High conductivity of the metal is associated with free or conduction of
electrons
 Heat developed in the conductors
 Super-conductors
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Conductors:

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Dielectric Materials or Insulating Materials:
 Electrical insulation between tow media at different potential
 Main function is insulation
 Polarization
 Large number of gaseous, liquid and solid insulating materials are available
Magnetic Materials:
 Since loadstones were recognized 3000 years ago
 Degree of reaction by magnetic materials
 Classes of magnetic materials

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 Material whose electrical conductivity is intermediate
 Semiconductors are crystalline materials
 Silicon & Germanium are the best known semiconductor materials
 The present day, world is dominated by semi-conducting materials
Semiconductors:

7. THANK
YOU
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