You are molding plates of Alumina from powder. The customer continues to complain of the poor performance of the plate during cooling. You decide to reduce the particle size for the next order. You place a test batch of powder having a mean particle size of 250 micro-meters into a ball mill for 8 hours. When you check the new size, you find that it is too fine. The average particle size is now 35 micro-meters. How long should you mill the original powder to achieve a mean particle size of 75 micro-meters? (use a=2, show all work, and state all assumptions)What are the three (3) levels of homogeneity? Provide a description and sketch for each.

You are molding plates of Alumina from powder. The customer continues to complain of the poor performance of the plate during cooling. You decide to reduce the particle size for the next order. You place a test batch of powder having a mean particle size of 250 micro-meters into a ball mill for 8 hours. When you check the new size, you find that it is too fine. The average particle size is now 35 micro-meters. How long should you mill the original powder to achieve a mean particle size of 75 micro-meters? (use a=2, show all work, and state all assumptions)What are the three (3) levels of homogeneity? Provide a description and sketch for each.

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

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Concept explainers

Radiation

Radiation can be described as the energy in the form of a particular matter or electromagnetic waves traveling in the air and can be in the form of light, sound, and heat. Radiation can be detected through special instruments like X-rays. The radiation from a cooler object is less intense as compared to the radiation from hot objects.

Question

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You are molding plates of Alumina from powder.
The customer continues to complain of the poor
performance of the plate during cooling. You
decide to reduce the particle size for the next
order. You place a test batch of powder having a
mean particle size of 250 micro-meters into a ball
mill for 8 hours. When you check the new size,
you find that it is too fine. The average particle
size is now 35 micro-meters. How long should
you mill the original powder to achieve a mean
particle size of 75 micro-meters? (use a=2, show
all work, and state all assumptions)What are the
three (3) levels of homogeneity? Provide a
description and sketch for each.

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