Zone Refining
| Also Known As | Zone melting, zone purification, float zone refining |
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What is Zone Refining?
A method for purifying metals and semiconductors by slowly moving a narrow molten zone along a bar of the material. Impurities concentrate in the molten zone and are swept to one end, leaving a purer solid behind. Used to produce ultra-pure silicon for semiconductors and germanium.
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
A method for purifying metals and semiconductors by slowly moving a narrow molten zone along a bar of the material. Impurities concentrate in the molten zone and are swept to one end, leaving a purer solid behind. Used to produce ultra-pure silicon for semiconductors and germanium.
Zone refining is used to produce ultra-pure silicon and germanium for semiconductor devices. It is used to purify organic compounds for research and standards. High-purity metals for speciality applications including nuclear technology are refined by zone melting.
Zone refining processes operate at high temperatures requiring furnace safety protocols. Handling of high-purity semiconductor materials requires cleanroom procedures. Some impurities concentrated by zone refining may be toxic and require safe disposal.