Jawaharlal Nehru Technological University Hyderabad
Jawaharlal Nehru Technological University Hyderabad B.Tech IV CERAMIC SCIENCE AND TECHNOLOGY Previous Question Paper (November/December - 2018 - R15)
Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question in Part B carries 10 marks.
Part A
Give examples of refractory ceramics.
Answer
Common examples of refractory ceramics include alumina (Al2O3), silica (SiO2), magnesia (MgO), and zirconia (ZrO2).
What are ceramic super conductors? Give examples.
Answer
Ceramic superconductors are ceramic materials that exhibit zero electrical resistance when cooled below a specific critical temperature (Tc). Examples include Yttrium Barium Copper Oxide (YBa2Cu3O7-x) and Bismuth Strontium Calcium Copper Oxide (BSCCO).
Give examples of eutectic composition in ceramics.
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What is the important information obtained from Al2O3-SiO2 diagram?
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List out the developments in ceramics.
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Draw the microstructure of any two ceramics. Label the phases.
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List out the uses of SiC powder and ZnO2 powder.
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List out advantages and disadvantages of Sol gel Technology.
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What are the products of slip casting?
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What is hot pressing and extrusion?
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Part B
Explain Pauling’s rules and describe the crystal structures of ceramics with help of suitable examples.
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Explain glass formation process.
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What are the different types of glasses? Give their applications.
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With suitable examples explain binary and ternary alloy phase diagrams of ceramic materials.
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Draw the Al2O3- SiO2 phase diagram. Label all the points and phases etc and discuss its salient features.
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List out the uses of Al2O3 and SiO2.
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Discuss about the following properties in ceramics: a) Mechanical b) Electrical c) Thermal
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Discuss about the following properties in ceramics: a) Optical b) Magnetic c) Chemical.
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With the help of suitable examples explain Precipitation and Co-precipitation.
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With the help of suitable examples explain Sol gel Technology.
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Explain how the following ceramic powders are produced: a) SiC b) Al2O3
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What factors favour hot isostatic pressing for ceramic powder processing?
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Explain Injection moulding for ceramic processing.
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Compare tape casting and gel casting.
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Explain the mechanism of sintering in case of ceramic powders.
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What is spark plasma sintering? Describe it.
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