JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Prerequisite

Engineering chemistry and Engineering Physics - II

Course Objective:

• To understand the importance of various materials used in electrical engineering and obtain a qualitative analysis of their behavior and applications.

Course Outcomes

After completion of this course, the student will be able to

• Understand various types of dielectric materials, their properties in various conditions.
• Evaluate magnetic materials and their behavior.
• Evaluate semiconductor materials and technologies.
• Acquire Knowledge on Materials used in electrical engineering and applications.

UNIT - I

Dielectric Materials: Dielectric as Electric Field Medium, leakage currents, dielectric loss, dielectric strength, breakdown voltage, breakdown in solid dielectrics, flashover, liquid dielectrics, electric conductivity in solid, liquid and gaseous dielectrics, Ferromagnetic materials, properties of ferromagnetic materials in static fields, spontaneous, polarization, curie point, anti-ferromagnetic materials, piezoelectric materials, pyroelectric materials.

UNIT - II

Magnetic Materials: Classification of magnetic materials, spontaneous magnetization in ferromagnetic materials, magnetic Anisotropy, Magnetostriction, diamagnetism, magnetically soft and hard materials, special purpose materials, feebly magnetic materials, Ferrites, cast and cermet permanent magnets, ageing of magnets. Factors effecting permeability and hysteresis

UNIT - III

Semiconductor Materials: Properties of semiconductors, Silicon wafers, integration techniques, Large and very large scale integration techniques (VLSI)

UNIT - IV

Materials for Electrical Applications: Materials used for Resistors, rheostats, heaters, transmission line structures, stranded conductors, bimetals fuses, soft and hard solders, electric contact materials, electric carbon materials, thermocouple materials. Solid, Liquid and Gaseous insulating materials, Effect of moisture on insulation.

UNIT - V

Special Purpose Materials: Refractory Materials, Structural Materials, Radioactive Materials, Galvanization and Impregnation of materials, Processing of electronic materials, Insulating varnishes and coolants, Properties and applications of mineral oils, Testing of Transformer oil as per ISI

Text Books:

• 1. “R K Rajput”, “ A course in Electrical Engineering Materials”, Laxmi Publications, 2009
• 2. “T K Basak”, “ A course in Electrical Engineering Materials”, New Age Science Publications 2009

Reference Books:

• 1. TTTI Madras, “Electrical Engineering Materials”, McGraw Hill Education, 2004.
• 2. “AdrianusJ.Dekker”, Electrical Engineering Materials, PHI Publication, 2006.
• 3. S. P. Seth, P. V. Gupta “A course in Electrical Engineering Materials”, Dhanpat Rai & Sons, 2011. B.TECH ELECTRICAL AND ELECTRONICS ENGINEERING