Quartz crucible is a newly developed high-temperature resistant material. It has the advantages of poor thermal conductivity, low coefficient of expansion, high temperature resistance, good thermal stability, and low cost. Many users may not be aware of the factors that affect their thermal conductivity, so we will now introduce them.

1. Humidity: After the quartz crucible absorbs moisture, its thermal conductivity will increase. The thermal conductivity of water is 0.5W/(m · K), which is 20 times higher than the thermal conductivity of air, which is 0.029W/(m · K). The thermal conductivity of ice is 2.33W/(m · K), which results in a higher thermal conductivity of the quartz crucible.
2. Temperature: The thermal conductivity of materials increases with temperature, but it is not significant between 0-50 ℃. Only for materials at high and negative temperatures, the influence of temperature should be considered.
3. Heat flow direction: When the heat flow is parallel to the fiber direction, the insulation performance weakens; When the heat flow is perpendicular to the fiber direction, the thermal resistance performance of quartz crucible insulation material is better.
Quartz crucibles are widely used due to their low thermal conductivity, so understanding their influencing factors in detail during production can provide assistance.