Formation of crystalline phases in electroceramics of the system CaO−MgO−Al2O3−SiO2 (A review)

Characteristics are given for the chemical compounds which are contained in the CaO·Al₂O₃·2SiO₂?CaO·SiO₂?MgO·SiO₂?SiO₂ tetrahedron and constitute the main crystalline phase of a large group of electroceramics. It is shown to be possible to analyze natural magnesia-calcium silicates in a four-component system with allowance for the formation of chemical compounds. The use of diopside raw materials is substantiated and their advantages in the manufacture of electroceramics are assessed.