Heat treatment method of quartz glass
A heat treatment method and quartz glass technology, applied in glass forming, glass production, glass manufacturing equipment and other directions, can solve the problems of increased risk of impurity pollution, low production efficiency, long heat preservation time, etc., to shorten the heat preservation time, improve the Production efficiency, low stress birefringence effect
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Embodiment 1
[0035] Put the silica powder in a sintering furnace at 1600°C for vitrification treatment. After the powder is completely vitrified, cool down to 1300°C at a rate of -300°C / h, and then cool down at a rate of -50°C / h To the heat treatment temperature of 1200°C, keep it for 2 hours, then lower the temperature to the first annealing point temperature of 950°C at the first annealing rate of -15°C / h, and finally lower the temperature to room temperature at the second annealing rate of -100°C / h, the obtained transparent quartz glass The stress birefringence reaches 1.7nm / cm, and the data results are shown in Table 1.
Embodiment 2
[0037] Place the silica powder in a sintering furnace at 1600°C for vitrification treatment. After the powder is completely vitrified, cool down to 1300°C at a rate of -300°C / h, and then cool down at a rate of -100°C / h To the heat treatment temperature of 1150°C, keep it for 3 hours, then lower the temperature to the first annealing point temperature of 930°C at the first annealing rate -3°C / h, and finally lower the temperature to room temperature at the second annealing rate -100°C / h, the obtained transparent quartz glass The stress birefringence reaches 0.5nm / cm, and the data results are shown in Table 1.
Embodiment 3
[0039] Place the silica powder in a sintering furnace at 1600°C for vitrification treatment. After the powder is completely vitrified, cool down to 1300°C at a rate of -400°C / h, and then cool down at a rate of -150°C / h To the heat treatment temperature of 1100°C, keep it warm for 5 hours, then lower the temperature to the first annealing point temperature of 900°C at the first annealing rate -8°C / h, and finally lower the temperature to room temperature at the second annealing rate -150°C / h, the obtained transparent quartz glass The stress birefringence reaches 1.3nm / cm, and the data results are shown in Table 1.
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