RA%20LO%20lec%2027-28%20F09

RA%20LO%20lec%2027-28%20F09 - energy(use the wavelength...

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Reading and Learning Objectives for Lectures 27-28 Lecture 27: Ceramics, Semiconductors and Nanotechnology READINGS: Modern Materials Interchapter, pp. 656-669. Understand These Concepts Describe ceramics and the subclasses of ceramics: glasses, clays, refractories. Describe the properties and applications of ceramics. Compare and contrast the critical T of ceramic superconductors to metallic superconductors. Describe how valence bands and conduction bands result from the valence atomic orbitals of the atoms in a solid. Describe how band theory accounts for the conduction properties of solids and the relative conductivities of metals, non-metals, and metalloids. Master These Skills Calculate the wavelength that corresponds to a band gap energy in Joules. Determine the general region of the EM spectrum corresponding to the band gap
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Unformatted text preview: energy (use the wavelength from the above bullet). Lecture 28 Ceramics, Semiconductors and Nanotechnology READINGS: Modern Materials Interchapter, pp. 656-669. Understand These Concepts • Describe the band structure of p- and n-type semiconductors. • Describe how solar cells and LED’s work (i.e. what the electron transitions are and why they either absorb or emit light) and how they are related to each other. • Compare and contrast the terms power and energy. • Discuss the amount of solar energy available on the planet and the challenges associated in harnessing that energy. • Understand the general definition of nanotechnology and be familiar with some of the applications of nanomaterials. Master These Skills • Calculate energy available in kWh. • Calculate energy consumption from power and vice versa....
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This note was uploaded on 02/11/2011 for the course CHEM 115 taught by Professor L during the Fall '02 term at Purdue.

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