Material Science For SPPU Sem 3 Electrical Engineering Course Code :203142) Academic Year 2020-2021  (Paperback, P.G. Jamdade, Prof. U. B. Sarode)

UNIT-1 Dielectric Properties of Insulating Materials : Static Field, Parameters of Dielectric material [Dielectric constant, Dipole moment, Polarization, Polarizability], Introduction to Polar and Non- Polar dielectric materials. Mechanisms of Polarizations-Electronic, Ionic and Orientation Polarization (descriptive treatment only), Clausius Mossotti Equation, Piezo-Electric, Pyro-Electric and Ferro-Electric Materials, Dielectric loss and loss tangent, Concept of negative tan delta. (Refer Chapter 1) 07 UNIT-2 (A) Dielectric Breakdown : Introduction, Concept of Primary and Secondary Ionization of Gases (descriptive treatment only), Breakdown Voltage, Breakdown Strength, Factors affecting Breakdown Strengths of Solid, Liquid and Gaseous dielectric materials. (Refer Chapter 2) 02 (B) Testing of Materials : Explanation of following with objectives, equipment required, circuit diagrams and observations to be taken. 1. Measurement of dielectric loss tangent (tan ?) by Schering Bridge-IS 13585-1994. 2. Measurement of dielectric strength of solid insulating material-IS 2584. 3. Measurement of dielectric strength of liquid insulating material -IS 6798. 4. Measurement of dielectric strength of gaseous insulating material as per IS. (Refer Chapter 3) 04 End Semester Exam 70 Marks (Unit III, IV, V, VI) UNIT-3 Insulating Materials, Properties and Applications : Introduction, Characteristics of Good Insulating Material, Classification, Solid Insulating Materials-Paper, Press Board, Fibrous Materials, Ceramics, Mica, Asbestos, Resins, Liquid Insulating Materials such as Transformer Oil, Varnish, Askarel. Insulating Gases like Air, SF6. Insulating Materials for Power and Distribution Transformers, Rotating Machines, Capacitors, Cables, Line Insulators and Switchgears. (Refer Chapter 4) 06 UNIT-4 Magnetic Materials : Introduction, Parameters of Magnetic material [Permeability, Magnetic Susceptibility, Magnetization], Classification of Magnetic Materials, Diamagnetism, Paramagnetism, Ferromagnetism, Ferri-magnetism, Ferro-magnetic behavior below Critical Temperature, Spontaneous Magnetization, Anti-ferromagnetism, Ferrites, Applications of Ferro magnetic Materials, Magnetic materials for Electric Devices such as Transformer Core, Core of Rotating Machines, Soft Magnetic Materials, Hard Magnetic Materials. (Refer Chapter 5) 06 UNIT-5 Conducting Materials : General Properties of Conductor, Electrical Conducting Materials - Copper, Aluminum and its applications, Materials of High and Low Resistivity-Constantan, Nickel-Chromium Alloy, Tungsten, Kanthal, Silver and Silver alloys, Characteristics of Copper Alloys (Brass and Bronze), Electrical Carbon Materials. Materials used for Lamp Filaments, Solders, Metals and Alloys for different types of Thermal Bimetal and Thermocouples. (Refer Chapter 6) 06 UNIT-6 Nanotechnology: Introduction, Concepts of Energy bands and various Conducting Mechanism in Nano-structures, Carbon Nano-structures, Carbon Molecules, Carbon Clusters, Carbon Nano-tubes and applications. Special Topics in Nano Technology such as Single Electron Transistor, Molecular Machines, BN Nanotubes, Nano wires. Nano materials used in Batteries, Photovoltaic Cells and in Supercapacitors. (Refer Chapter 7) 06