The results of studies of alkaline borosilicate glasses, which are designed to attenuate microwave electromagnetic radiation and have high thermal stability, are presented. The influence of the chemical composition of the experimental glasses on their LTEC and the value of the electrophysical properties (absorption index and standing wave ratio) has been established. Based on the research results, the composition of glass was determined, which is characterized by the required thermal stability and the value of absorption of electromagnetic radiation in the microwave range of at least 0.7 dB / mm. The proposed composition of glass can be recommended for the manufacture of products used as radiation shielding
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