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How to clean the quartz tube used in the tube furnace?

How to clean the quartz tube used in the tube furnace?

1. It can be cleaned with hydrofluoric acid.

2. Use fuming nitric acid or hot concentrated sulfuric acid to wash or soak for 3 to 5 minutes. If necessary or repeat it several times, it can be washed.

3. High temperature burning, steam blowing.