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Ceramics part:2
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Shankar Kumar
B.TECH | ELECTRONICS & TELECOMMUNICATION | ESE WRITTEN QUALIFIED | 4 YEARS OF TEACHING Experience..

U
Unacademy user
how steel is a ceramic?
Shankar Kumar
a year ago
steel is not an ceramic..
  1. 1710 re-thode Cesarnus which has Atonie b Psedomim tonu tuu oudu med that they made-p ton n 2 _ twice


  2. anions 14 Bc. aton- Ancom radius 1 Cato.


  3. mud be in dsect mtt. Some covalent and chsertion Uuhu Ler ami Sphalesite


  4. Hello! Shankar Kumar B.Tech -Electronics&Telecommunication Cleared 2017 ESE written & Two times GATE Qualified. 4 Years of teaching experience


  5. e Tanget 4udi ente o Au fru Branches


  6. Cube Cure while n ctma d eleche Length dt ne4 as v thiekne to Cause breakdouen in the


  7. Strength o Elast lintar behanior TouahnexLos 'zirconia, melt at 3200c reep h Cep Resistance and Expaahen: Exceuent the


  8. Role Chamis ment f .erala, g 10) lo1 Bones 12 8) Semi cendu chss


  9. GENERAL COMPARISON OF MATERIALS Metal Property Ductility Density Electrical Polymer High Very Low Ceramic High Low Low High Depends on Material High Low Conductivity Depends on Material Thermal High Low Conductivity Depends on Material Very Low Magnetic High 15


  10. Q.1 Consider the following assumptions made while developing the ionic packing theory: 1. Cations and anions are spherical but these spheres are not harod 2. Cations are always smaller than anions 3. Each cation would tend to be surrounded by the maximum number of anions permitted by geometry 4. Cations and anions do not touch each other Which of the above assumptions are correct? (a) 1 and 3 (c) 2 and 4 (b) 1 and 4 (d) 2 and 3 [ESE: 2017] Ans. (d) For stable structuer in ionic material (like ceramics) Cations and anions are assumed hard sphere ions so statement 1 is wrong Cations and anions must touch each other so statement 4 is wrong Q.2 Consider the following statements: 1. Baking soda is used in fire extinguishers 2. Quick lime is used in the manufacture of glass Which of the above statements is/are correct? (a) 1 only (c) Both 1 and 2 (b) (d) 2 only Neither 1 nor 2 [ESE 2017] Ans. (c) Both statements are correct