Alsint 99.7
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FAQ
- The quartz ceramic crucible melting quartz crucible
- Because of the use of extremely harsh conditions, the crucible of purity, strength, appearance defects, internal quality, high temperature performance, thermal shock stability and dimensional accuracy has very strict requirements.
- External surface macular problem of arc type quartz crucible
- In order to solve this problem, you can start from two aspects: the 1 is the melting of sandblasting, cutting and transportation and storage process, do not touch the pollutants; such as dirty gloves, equipment oil, touch, dust, etc.. 2 is pickling. Hydrofluoric acid blister for a few minutes, rinse with deionized water, water resistivity is higher than 12 trillion, 14 or 16 better.
- A brief introduction to quartz crucibles
- HF can not contact, high temperature, easy and effect of carbonate caustic alkali metal.
- What happens when carbon carbon crucibles are cracked?
- If the whole crucible is used, the external force of the crucible will cause the fiber damage of the carbon crucible when the quartz crucible is taken.In addition, the carbon carbon crucible may cause cracks during the fabrication of the preform.
- What are the functional features of quartz crucibles?
- The quartz crucible is suitable for melting samples with K2S2O7, KHSO4 as flux, and using Na2S207 (first drying at 212 degrees) to treat samples with flux.
- At present, the quartz crucible used in Czochralski silicon is used to make use of barium coating, but how does the oxygen content rise when the coating react with the silicon melt?
- The coating has the effect of increasing the crystallization rate without increasing the cost and is more impractical
- Can the quartz crucible react with calcium oxide or calcium hydroxide at high temperature?
- The main component of the quartz crucible is SiO2. Silica is an atomic crystal with a high boiling point, so it can be used as a crucible material.
- How much fire resistance is quartz crucible?
- It depends on the raw material used in your crucible. It is usually above more than 1100 degrees, but it must be guaranteed to not be crystallized
