Material Science

Credit - 03

Unit 01: 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 & Ferro-Electric Materials, Dielectric loss and loss tangent, Concept of negative tan delta.

Unit 02: 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.

Unit 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 δ) 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.

Unit 03 : Insulating Materials, Properties & 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.

Unit 04 : 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.

Unit 05 : 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 & Bronze), Electrical Carbon Materials. Materials used for Lamp Filaments, Solders, Metals and Alloys for different types of Thermal Bimetal and Thermocouples.

Unit 06 : 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.

Text Books:
[T1] “A Course in Electrical Engineering Materials”, by S.P. Seth, Dhanpat Rai and Sons publication.
[T2] A Textbook of “Electrical Engineering Materials” by R.K.Rajput, Laxmi Publications (P) Ltd.
[T3] “Electrical Engineering Materials”, by T.T.T.I, Madras.
[T4] “Electrical Engineering Materials”, by K. B. Raina and S. K. Bhattacharya, S. K. Kataria Sons.
[T5] “Material Science for Electrical Engineering”, by P.K. Palanisamy, Scitech Pub. Pvt. Ltd., Chennai (India).
[T6] “Introduction to Nanotechnology” by Charles P. Poole, Jr. Frank & J. Ownes (Wiley Student Edition)

Reference Books:
[R1] “Electrical Power Capacitors-Design & Manufacture”, by D. M. Tagare, Tata McGraw Hill Publication.
[R2] “Electrical Engineering Materials”, by S. P. Chalotra and B. K. Bhattacharya, Khanna Publishers, Nath Market.
[R3] “Electrical Engineering Materials”, by C. S. Indulkar and S. Thiruvengadam, S. Chand and Company Ltd.
[R4] “High Voltage Engineering” by Kamraju and Naidu, Tata McGraw Hill Publication.
[R5] “Introduction to Material Science for Engineering”, Sixth Edition by James F. Shackelford & M. K. Muralidhara, Pearson Education.
[R6] “Insulation Technology Course Material” of IEEMA Ratner, Pearson Education.
[R7] “Materials Science for Engineering Students”, by Traugott Fischer, Elsevier Publications.
[R8]“Energy Conversion Systems”, by Rakosh Das Begamudre, New Age International Publishers.
[R9] “Advanced Nanomaterials and Their Applications in Renewable Energy”, by Jingbo Louise Liu, Sajid Bashir, ELSEVIER Publications.