Silicon carbide is used as being a raw component in certain glazes placed on ceramics. At substantial temperatures it could possibly cut down metal oxides forming silica and carbon dioxide. The phenomenon of electroluminescence was discovered in 1907 using silicon carbide and some of the to start with business LEDs https://american-glass-lined-duct93703.wikiconversation.com/7339718/not_known_factual_statements_about_cuprous_oxide