Ceramic materials based on beryllium-oxide ceramics (BeO) have a lot of unique physical-chemical properties, such as high chemical, heat, mechanical and radiation resistance, thermal conductivity, high sound speed, high electrical resistivity, low dielectric loss, and transparency for vacuum, ultraviolet, X, visible light, infrared and RF radiation. At the same time, many technical characteristics and possible application of BeO-ceramic materials in different extremal conditions, for example in space, are not fully studied. It makes research of BeO-ceramic materials properties very promising, because BeO-ceramic materials can be widely applied not only in electronics, but also in aerospace and other fields of state-of-the-art technology.