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Chapter10 - Chapter 10 Electrical Properties Electrical...

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Chapter 10 Electrical Properties Electrical Conduction – Charge per carrier – Mobility – Energy bands and number of charge carriers – Conductors, semiconductors and insulators – Ionic conduction – Conducting polymers – Superconductivity • Semiconductors – Intrinsic and extrinsic conduction – Role of defects – Simple devices – Microelectronics
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Chapter 10 Definitions at the end of the chapter • Conductors Concept of band gaps • Insulators • Semiconductors – Intrinsic – Extrinsic • Superconductors
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Electrical conductivities for a variety of materials at room temperature Metals and alloys σ [( -cm) -1 ] Al 3.8 x 10 5 Ag 6.3 x 10 5 Au 4.3 x 10 5 Co 1.6 x 10 5 Cr 7.8 x 10 4 Cu 6.0 x 10 5 Fe 1.0 x 10 5 Mg 2.2 x 10 5 Ni 1.5 x 10 5 Pd 9.2 x 10 4 Pb 4.8 x 10 4 Pt 9.4 x 10 4 Sn 9.1 x 10 4 Ta 8.0 x 10 4 Zn 1.7 x 10 5 Zr 2.5 x 10 4 Plain carbon steel (1020) 1.0 x 10 5 Stainless steel (304) 1.4 x 10 4 Gray cast iron 1.5 x 10 4
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Electrical conductivities for a variety of materials at room temperature Ceramics σ [( -cm) -1 ] ReO 3 5.0 x 10 5 CrO 2 3.3 x 10 4 SiC 1.0 x 10 -1 Fe 3 O 4 1.0 x 10 2 SiO 2 <10 -14 A1 2 O 3 <10 -14 Si 3 N 4 <10 -14 MgO <10 -14 Si 1.0 x 10 -4 Ge 2.3 x 10 -2
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