Influence of thermal processing on quality of products surface made of quartz glass

Silicon-oxygen tetrahedra is the basis of a strong surface in silicate glasses. They are nanostructures for macroformations, which are called globules. The smaller the size of globules is, the stronger is the surface, because more siloxane bonds form between them. This factor affects the quality of the product surface, which improves the inductance of the resonator circuit, and therefore, increases the Q factor. The size of globules is provided by means of annealing technology. The tempering process takes place at a temperature gradient of 300$^\circ$C per hour. A further change of the cooling temperature leads to the formation of cracks. Experiments carried out with the help of the Vickers method and the method of a recumbent drop on distilled water and glycerin showed that the greatest strength of the surface is achieved in resonators annealed in the temperature range 950–1080$^\circ$C, and the Q factor takes the maximum value.