Si and Ge used for semiconductors are required to be of high purity and hence purified by

English

Gujarati

Hindi

General Principles and processes of Isolation of Elements

easy

$Si$ and $Ge$ used for semiconductors are required to be of high purity and hence purified by

zone-refining

electrorefining

Van-Arkel's process

cupellation process

Solution

Semiconductor materials like $Si$ and $Ge$ are usually purified by zone refining. Zone refining is based on the principle of fractional crystallisation. Due to differences in solubilities of impurities in solid and molten states of metal, the zones of impurities are formed and finally removed.

Standard 12

Chemistry