Precautions for Quartz Tube High Temperature Electric Furnace Oven

When the furnace lining is heated to 573°C, the β-quartz in the furnace lining is quickly converted into α-quartz, and the size expands by 0.82%. The temperature then rises, and α-quartz is converted to α-tridymite at 870°C, and its size expands by 16%. Expansion too fast during the phase transition of quartz will easily induce cracks or even peel off, because when this is heated from 400°C to 600°C, the heating speed should be slow, and at 870°C, it should be kept warm for 1h～2h, so that it can not be fast and Absolute phase change.