Answered: Why is atomic diffusion called a…

Why is atomic diffusion called a thermal activation process? What does the thermal activation energy represent? How does the diffusion rate depend on temperature?

Understanding Motor Controls

4th Edition

ISBN:9781337798686

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter44: Semiconductors

Section: Chapter Questions

Problem 4RQ

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Concept explainers

Atomic diffusion in solids

In material science, diffusion can take place in solid, liquid, and gases. In solids, atomic diffusion can take place with the help of thermally activated and randomly vibrating atoms. The atomic diffusion in solids is complex and very slow in comparison to atomic diffusion in liquids and gases because the interatomic distance between the atoms is smaller in solids as compared to liquids and gases.

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Why is atomic diffusion called a thermal activation process? What does the thermal activation energy represent? How does the diffusion rate depend on temperature?

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