Q1/ Aluminum is diffused into pure silicon to make a semiconductor material. How long should be the silicon be heated at 1300°C in contact with the aluminum such that the aluminum concentration at 0.01 mm below the surface of silicon. Q= 80 000 cal /mol. X=V Dt (Take :- Do for Al in Si is 8 cm2/sec. X= distance. t= time. D= Diffusion coefficient. R= gas constant = 2 %3D %3D cal/mol.°K
Q1/ Aluminum is diffused into pure silicon to make a semiconductor material. How long should be the silicon be heated at 1300°C in contact with the aluminum such that the aluminum concentration at 0.01 mm below the surface of silicon. Q= 80 000 cal /mol. X=V Dt (Take :- Do for Al in Si is 8 cm2/sec. X= distance. t= time. D= Diffusion coefficient. R= gas constant = 2 %3D %3D cal/mol.°K
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
Related questions
Question
Transcribed Image Text:Q1/ Aluminum is diffused into pure silicon to make a semiconductor
material. How long should be the silicon be heated at 1300°C in contact
with the aluminum such that the aluminum concentration at 0.01 mm
below the surface of silicon.
Q= 80 000 cal /mol. X=V Dt
X= distance. t = time. D= Diffusion coefficient. R= gas constant =
(Take :- Do for Al in Si is 8 cm²/sec.
%3D
cal/mol.°K
Q2/ The following results were obtained from a tensile test of a steel. The
test piece had a diameter of 10mm and a gauge length of 50mm. plot the
load – extension graph and determine (a) the tensile strength . (b) the
fracture stress. (c) the tensile modulus.
Load
5
10
15
20
25
30
32
28
KN
0 0.01 0.03 0.05 |0.07 0.08 | 0.1 0.15 0.25
(fracture)
Ext.
mm
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 2 steps
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemical-engineering and related others by exploring similar questions and additional content below.Recommended textbooks for you
Introduction to Chemical Engineering Thermodynami…
Chemical Engineering
ISBN:
9781259696527
Author:
J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:
McGraw-Hill Education
Elementary Principles of Chemical Processes, Bind…
Chemical Engineering
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY
Elements of Chemical Reaction Engineering (5th Ed…
Chemical Engineering
ISBN:
9780133887518
Author:
H. Scott Fogler
Publisher:
Prentice Hall
Introduction to Chemical Engineering Thermodynami…
Chemical Engineering
ISBN:
9781259696527
Author:
J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:
McGraw-Hill Education
Elementary Principles of Chemical Processes, Bind…
Chemical Engineering
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY
Elements of Chemical Reaction Engineering (5th Ed…
Chemical Engineering
ISBN:
9780133887518
Author:
H. Scott Fogler
Publisher:
Prentice Hall
Industrial Plastics: Theory and Applications
Chemical Engineering
ISBN:
9781285061238
Author:
Lokensgard, Erik
Publisher:
Delmar Cengage Learning
Unit Operations of Chemical Engineering
Chemical Engineering
ISBN:
9780072848236
Author:
Warren McCabe, Julian C. Smith, Peter Harriott
Publisher:
McGraw-Hill Companies, The