The microhardness of quartz ceramic was measured at three stages of heat treatment of the primary billet obtained by slip casting: after drying at 100 ° C; after sintering at 1190 ° C; after flaming surface treatment. Although the hardness of the final product is close to the known values ??for silica glass, the IR spectroscopy data indicate the presence of significant internal stresses in the material. The found high content of terminal atomic groups in the primary material is a favorable factor for the doping of Kersyl.
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