Influence of the method for producing radiotransparent ceramics based on the system SrO—BaO—Al2O3—SiO2 on its properties

Abstract

The results of the study of samples of radiotransparent ceramics based on the system SrO—BaO—Al2O3—SiO2 which have been made in one-step and two-step process have been presented. A comparative analysis of their sintering characteristics and dielectric properties have shown that materials which were obtained by a two-stage process are characterized by a relatively high degree of sintering (W = 2..72 ÷ 3.97 %, Papp = 2901 ÷ 3180 kg/m3), sufficient values of dielectric losses tangent (tgδ = 0.000258 ÷ 0.000313), however, their dielectric permittivity (ε = 12.11 ÷ 14.38) don’t reach the specified level. It was concluded that it is necessary to modify the compositions of the basic oxide system using small additives that intensify sintering and provide high-temperature stability of solid solutions of slawsonite and celsian.