Pe. Hickel et al., ON THE DEVELOPMENT OF NEW SOLVENTS FOR THE HIGH-PRESSURE CRYSTAL-GROWTH OF ALPHA-QUARTZ, Annales de chimie, 22(8), 1997, pp. 571-576
alpha-quartz appears as an important material for high-frequency devic
es due to its high frequency stability. The significant reduction of t
he thickness due to the increase of the frequency requires a strong im
provement of quality of alpha-SiO2 single crystals, in particular a lo
w concentration of chemical and physical defects. Among the main physi
co-chemical parameters able to help the achievement of such a goal, th
e composition of the solvent has been investigated, the conventional a
queous solutions of NaOH being replaced by NaF.