Babban tef ɗin silica samfuri ne mai jujjuya kintinkiri da aka saka daga babban fiber gilashin silica, galibi ana amfani da shi don ɗaurewa da naɗawa ƙarƙashin babban rufin zafin jiki, rufewa, ƙarfafawa, rufi da sauran yanayin aiki.
Ana iya amfani da shi stably a 1000 ℃ na dogon lokaci, da kuma nan take zafi juriya zazzabi iya isa 1450 ℃.