Assertion: tellurium | /r/ObjectUse | used as semiconductor
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text: It is alloyed with stainless steel and copper to improve their machinability and tellurium is used as a semiconductor, cadmium telluride is used in solar panels because it has the highest efficiency for electricity generation, tellurium speeds the curing of rubber and renders it less susceptible to aging and to the softening effects of oil, and tellurium oxide, TeO, is used in some rewritable CDs and DVDs.