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Chapter 1, Problem 1CO

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Chemistry for Engineering Students

4th Edition
Lawrence S. Brown + 1 other
ISBN: 9781337398909

Solutions

Chapter
Section
BuyFindarrow_forward

Chemistry for Engineering Students

4th Edition
Lawrence S. Brown + 1 other
ISBN: 9781337398909
Interpretation Introduction

Interpretation:

The meaning of the term “critical materials” should be explained.

Concept introduction:

Any substance used in technology for which there are no easy substitutes as a result of their unique properties and that is subjected to supply risks due to environmental implications and cost are referred to as critical materials.

Answer

Solution:

Any substance used in technology for which there are no easy substitutes as a result of their unique properties and that is subjected to supply risks due to environmental implications and cost are referred to as critical materials.

Explanation
  • Five rare earth elements, dysprosium, terbium, europium, neodymium and yttrium are considered as critical materials. Lithium and tellurium are categorized as “near critical” materials in the next 15 years.
  • They are characteristic due to their unique magnetic, catalytic and luminescent properties.

Most powerful permanent magnets are formed by neodymium, which is about 10 times more powerful than refrigerator magnets. Adding small amounts of dysprosium to this magnet makes. it withstands high temperatures and demagnetization is reduced

Fluorescent lights as well as flat screen TVs and computer screen use critical materials europium, terbium, and yttrium which are responsible for the red, blue and green colors.

Conclusion

Any substance used in technology for which there are no easy substitutes as a result of their unique properties and that is subjected to supply risks due to environmental implications and cost are referred to as critical materials.

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