Influence of zinc-containing compounds on the properties of ceramic materials based on the Li₂O–MgO–Al₂O₃–SiO₂ system

The results of a study the influence of magnesium oxide substitution with zinc oxide in the Li 2 O–MgO– Al 2 O 3 –SiO 2 system, as well as the introduction of pre-synthesized ganite ZnAl 2 O 4 , on sintering, phase formation and thermal expansion of synthesized materials are presented. It was found that after substitution of 4 % magnesium oxide MgO with zinc oxide ZnO, the ceramic material synthesized at a temperature of 1 150 °C was characterized by higher values of apparent density (not less than 1 835 kg/m 3 ), mechanical compressive strength (300 MPa), and heat resistance (more than 80 thermal cycles), as well as low values of LTEC (–0,25 ∙ 10 –6 K –1 ), which is due to the formation of crystalline phases of spodumene, spinel, forsterite, corundum, ganite and quartz.