PPT Slide
- As crystals form, planes can become misaligned, vacancies can occur, and dislocations can arise where foreign particles are lodged.
- In metal alloys, atoms of one metal may occupy lattice sites of another. Often, the alloy is harder than the pure metals.
- The conductivity of semiconductors can be greatly enhanced by doping, which is done by adding small amounts of other elements.
- Doping can increase or decrease the number of valence electrons in the band of molecular orbitals.
- Silicon, with the diamond structure, is a poor conductor because an energy gap separates its filled valence band from its conduction band.
Notes: