IIT BHU Varanasi Syllabus Materials Science

Materials Science

Crystal Structure: Unit cell, crystallographic directions and planes, crystal symmetry, point groups, space groups.

Close packed crystal structures and coordination polyhedra. Common metallic structures. Density calculations.

Types of Crystal structures; AX, AmXp and Am Bn Xp type crystal structures. Structure of Rock salt, rutile, zinc

blend, wurtzite, cesium chloride, cadmium iodide, perovskites, spinel, garnet, high Tc super conductors. Structure of

silicates (Orthosilicates, pyrosilicates, single chain, double chain, sheet and network silicates), Zeolites and Polymers. Crystal Imperfections: Types of defects, Points Defects; Kro’ger Vink  notations, Thermodynamics of

point defects, Elementary defect chemistry. Effect of impurities on concentration of defects. Intrinsic and extrinsic

donors and acceptors. Line defects: Edge and screw  dislocations, Burger vector, Slip systems, Energy of

dislocations, Interaction between dislocations motion, plastic deformation, Frank Read source. Strengthening

mechanisms.  Electrical Properties: Conductivity of Metals. Mattheisen’s Rule, Sommerfield , Band Theory of

Solids. Metals, Semiconductors and Insulators. Intrinsic and Extrinsic Semiconductors. Concentration and mobility

of charge carriers and their variation with temperature. Semi-conducting  materials. Magnetic Properties: Origin of

Ferromagnetism and hysteresis loop, Domains and Magnetic Anisotropy, Magnetostriction. Soft and Hard Magnetic

Materials and their Applications. Optical Properties: Interaction of Electromagnetic waves with matter. Absorption,

reflection, transmittance  and colour of materials. Lasers.