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Do you understand the loss of quartz glass?
The author : time : 2016-07-14 Click on the number of times : 63
What are the properties of the quartz glass? Do you understand? Below by Beijing kailiaa quartz glass instrument factory Xiaobian to introduce you.
Devitrification is also called crystallization is a flaw in the quartz glass, from the viewpoint of thermodynamics, energy of the quartz glass is higher than that of state cristobalite crystallization, is a thermodynamically metastable, when temperatures above 1000 DEG C, SiO2 molecular vibration acceleration, the re arranged for a longer period of time, set to form crystals. The opacity is expressed by the growth rate of crystal nucleus, the transparent quartz glass is at 1620 degrees Celsius, and the opaque quartz glass is at 1520 degrees, and the crystallization rate reaches the maximum value.
Crystallization mainly appearing on the surface, followed by internal defects, the reason is these places easily soiled by impurity ions of the local cluster, especially alkali ions into the network resulting in viscosity reduction, promote devitrification acceleration.
Devitrification is also called crystallization is a flaw in the quartz glass, from the viewpoint of thermodynamics, energy of the quartz glass is higher than that of state cristobalite crystallization, is a thermodynamically metastable, when temperatures above 1000 DEG C, SiO2 molecular vibration acceleration, the re arranged for a longer period of time, set to form crystals. The opacity is expressed by the growth rate of crystal nucleus, the transparent quartz glass is at 1620 degrees Celsius, and the opaque quartz glass is at 1520 degrees, and the crystallization rate reaches the maximum value.
Crystallization mainly appearing on the surface, followed by internal defects, the reason is these places easily soiled by impurity ions of the local cluster, especially alkali ions into the network resulting in viscosity reduction, promote devitrification acceleration.
Reproduced please specify：Laser Optex Inc. » Do you understand the loss of quartz glass?
