GTU BE 8th Semester 2183606 Physical Ceramics Summer 2018 Question Paper

1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE ? SEMESTER- VIII (NEW SYLLABUS) EXAMINATION- SUMMER 2018
Subject Code: 2183606 Date:30-04-2018
Subject Name: Physical Ceramics
Time: 10:30 AM to 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

MARKS
Q.1 (a) Describe smart materials with examples 03
(b) Describe photonic materials with examples 04
(c) Describe 7 crystal systems and 14 bravais lattices with examples. 07

Q.2 (a) Describe classification of refractories based on acidity. 03
(b) Describe classification of refractories based on mode of pressing. 04
(c) Describe Fe- Fe3C phase diagram. 07
OR
(c) Describe any binary phase diagram. 07
Q.3 (a) Deduce the expression of atomic packing factor for BCC close packing. 03
(b) Deduce the expression of atomic packing factor for FCC close packing. 04
(c) Describe BCC, FCC, HCP close packing with examples 07
OR
Q.3 (a) Describe refining process with examples. 03
(b) Describe annealing process in brief. 04
(c) Describe network former, intermediate and modifier with examples. 07

Q.4 (a) Define ferroelectric material. 03
(b) Describe the hysteresis curve of spontaneous polarization. 04
(c) Describe various polymorphs of Barium Titanate 07
OR
Q.4 (a) Distinguish between homogeneous and heterogeneous nucleation. 03
(b) Deduce the mathematical model for heterogeneous nucleation 04
(c) Describe the hysteresis loop to explain polarization. 07
Q.5 (a) Define what is chrome ore. 03
(b) Describe properties of chrome ore. 04
(c) Describe chrome ore structure 07
OR
Q.5 (a) Describe alumina structure. 03
(b) Deduce the mathematical model for crystal growth. 04
(c) Describe the modus operandi of glass tank furnace. 07

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