Question

______ has made of silicon and alumnina,​

Answer 1

Explanation:

Aluminium silicate is a type of fibrous material made of aluminium oxide and silicon dioxide, (such materials are also called aluminosilicate fibres). These are glassy solid solutions rather than chemical compounds. The compositions are often described in terms of % weight of alumina, Al2O3 and silica, SiO2.

Answer 2

Brazing sheet is made of silicon and aluminum