The sol-gel method was used to synthesize glass ceramics based on the compositions of the Sr (Ba) - Al 2 O 3 - SiO 2 systems, modified with the addition of zirconium oxides ZrO < sub> 2 and hafnium HfO 2 in the presence of stabilizing yttrium oxide and without it. It is shown that the introduction of refractory oxides contributes to a reduction in the gelation time of the initial solutions, intensifies the sintering of glass ceramics, and also leads to a change in the temperature ranges of the phase formation processes and the nature of the precipitated crystalline phases. The use of the sol-gel method made it possible to ensure a uniform distribution of modifier oxide grains in the volume of glass ceramics. Yttrium oxide in the structure of materials is concentrated near ZrO 2 and HfO 2 particles
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