The process used to produce silicon with a purity of more than 99.999999% is called
A)zone refining.
B)electrorefining.
C)distillation.
D)sublimation.
E)alloying.

Question

Quizplus · Accepted Answer

Zone refining is a highly effective method for purifying silicon. It involves melting the silicon and then slowly moving a heating element along the length of the liquid to create a molten zone. Any impurities in the silicon are partitioned into this molten zone and then moved away from the purified silicon. This process can be repeated multiple times until the desired level of purity is achieved, which for silicon is typically more than 99.999999%. Electrorefining and distillation are also purification methods, but they are not as effective as zone refining for achieving such high levels of purity in silicon. Sublimation and alloying are not relevant processes for this application.

The Process Used to Produce Silicon with a Purity of More