The prospect of products' manufacturing based on Slavsonite (strontium aluminosilicate-SrAl 2 Si 2 O 8) is in the ability to combine a complex of dielectric and physical-mechanical characteristics of this material, such as radiotransparency, high strength, temperature resistance, and to have a low cost of raw materials. Slavsonite, besides the low dielectric permittivity value ε ~ 6.2…6.8, has the lowest dielectric loss tanδ ~ 0.0001 ... 0.0002 from among the crystalline phases, suitable for creating radioceramics [1]. Such materials are most often used when creating protection elements for aircraft antenna transmitters under high temperature and mechanical loads. For radiotransparent ceramic materials, low dielectric losses (tanδ < 0.001) and high stability of properties with temperature changes are typical. For example, the dielectric permittivity of sitalls does not change by more than ± 1%, and the tangent of dielectric loss increases by no more than ± 20% when the temperature changes from-60 ° to +1,200 °C [2]. The relevance of the study is creation of high-strength products of simple shape from the developed masses of radio transparent material based on the crystalline phase of Slavsonite.