The practice shows that the particle size distribution of the impurities and gases and the content of powders is the important factor affecting the quality of quartz glass.
At high temperatures (> 1000), the impurity ions Li Na +, K + + Ca2 + magnesium 2 + Fe2 + later precipitation induced SiO2 glass crystal alkali metal impurities will reduce the melting point of quartz materials and softening point of the transition elements affect the light of the quartz glass through the ability to aluminum is the main impurity elements, a small amount of aluminum will not affect the appearance quality of quartz glass, but not conducive to reduce the ray irradiation resistant ability.
Undressed ore gas mainly comes from water and mineral powder on the surface of a component of a gas-liquid inclusions in melted quartz glass, high SiO2 melt viscosity, containing gas is not easy to rule out, but grew up into a bubble, the smaller the impact on the quality of quartz glass gas molecules, the diffusion coefficient, the greater the as He H2 diffusion coefficient is big, easy to discharge N2 CxHx CO, CO2 and other gases from the eduction in melt, extremely hard form bubbles, eventually affect the transparency of quartz glass
