Homework Help is Here – Start Your Trial Now!
Engineering
Mechanical Engineering
(c) The unit cell for Al;Os has hexagonal symmetry with lattice parameters a -0.4759 nm and c- 1.29 nm. If the density of this material is equal to 3.99 g/cm' and is calculated according to the formula n'(E Ac+ EA) VCNA Calculate the atomic packing factor for Al;O1, given that the ionic radius for Al is 0.053 nm and o' is 0.140 nm. Take N = 6.023 x 1023 atoms/mole.

(c) The unit cell for Al;Os has hexagonal symmetry with lattice parameters a -0.4759 nm and c- 1.29 nm. If the density of this material is equal to 3.99 g/cm' and is calculated according to the formula n'(E Ac+ EA) VCNA Calculate the atomic packing factor for Al;O1, given that the ionic radius for Al is 0.053 nm and o' is 0.140 nm. Take N = 6.023 x 1023 atoms/mole.

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
See similar textbooks
icon
Related questions
Question
Answer part c
Question Seven (a) For refractory ceramic materials, cite two characteristics that improve with and two characteristics that are adversely affected by increasing porosity. (b) Show that the minimum cation-to-anion radius ratio for a coordination number of 4 is 0.225. (Hint: Use the AX crystal structure, assuming the anion spheres touch in plane). (c) The unit cell for Al>Os has hexagonal symmetry with lattice parameters a = 0.4759 nm and c 1.2 nm. If the density of this material is equal to 3.99 g/cm' and is calculated according to the formula n'(E Ac+ EAA) V.NA Calculate the atomic packing factor for Al>O, given that the ionic radius for AI is 0.053 nm and i 0' is 0.140 nm. Take N, = 6.023 x 1023 atoms/mole. (d) Mention any three industrial ceramics and indicate their applications.
Transcribed Image Text:Question Seven (a) For refractory ceramic materials, cite two characteristics that improve with and two characteristics that are adversely affected by increasing porosity. (b) Show that the minimum cation-to-anion radius ratio for a coordination number of 4 is 0.225. (Hint: Use the AX crystal structure, assuming the anion spheres touch in plane). (c) The unit cell for Al>Os has hexagonal symmetry with lattice parameters a = 0.4759 nm and c 1.2 nm. If the density of this material is equal to 3.99 g/cm' and is calculated according to the formula n'(E Ac+ EAA) V.NA Calculate the atomic packing factor for Al>O, given that the ionic radius for AI is 0.053 nm and i 0' is 0.140 nm. Take N, = 6.023 x 1023 atoms/mole. (d) Mention any three industrial ceramics and indicate their applications.
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 3 steps with 5 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Elements Of Electromagnetics
Elements Of Electromagnetics
Mechanical Engineering
ISBN:
9780190698614
Author:
Sadiku, Matthew N. O.
Publisher:
Oxford University Press
Mechanics of Materials (10th Edition)
Mechanics of Materials (10th Edition)
Mechanical Engineering
ISBN:
9780134319650
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Thermodynamics: An Engineering Approach
Thermodynamics: An Engineering Approach
Mechanical Engineering
ISBN:
9781259822674
Author:
Yunus A. Cengel Dr., Michael A. Boles
Publisher:
McGraw-Hill Education
Control Systems Engineering
Control Systems Engineering
Mechanical Engineering
ISBN:
9781118170519
Author:
Norman S. Nise
Publisher:
WILEY
Mechanics of Materials (MindTap Course List)
Mechanics of Materials (MindTap Course List)
Mechanical Engineering
ISBN:
9781337093347
Author:
Barry J. Goodno, James M. Gere
Publisher:
Cengage Learning
Engineering Mechanics: Statics
Engineering Mechanics: Statics
Mechanical Engineering
ISBN:
9781118807330
Author:
James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher:
WILEY
SEE MORE TEXTBOOKS