A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The invention belongs to the technical field of crucible processing, particularly relates to a high-strength and high-toughness quartz crucible additive, and provides the following scheme aiming at the technical problems that crystals are easy to separate out in the heating process of an existing quartz crucible and the performance of the crucible is easy to reduce: the high-strength and high-toughness quartz crucible additive comprises polyoxyethylene, Si3N4, a surfactant, talcum powder, carbon powder and ceramic powder. According to the method, combination with oxygen is reduced, so that crystallization of cristobalite can be reduced, silicon nitride is oxidized, a certain amount of oxygen is consumed, viscous flow dynamic amorphous SiO2 generated by oxidation promotes sintering of the quartz ceramic, and in the whole sintering process, broken bond reconstruction type phase change is generated due to the fact that no other external causes exist, so that the sintering performance of the quartz ceramic is improved. Meanwhile, the added carbon powder can be oxidized in the high-temperature baking process to absorb the oxygen component in the quartz crucible material.
本发明属于坩埚加工技术领域，尤其是一种高强高韧石英坩埚添加剂，针对现有石英坩埚加热过程容易析出晶体，容易导致坩埚性能下降的技术问题，提出以下方案，包括聚氧化乙烯、Si3N4、表面活性剂、滑石粉、碳粉和陶粉。本发明降低了与氧的结合，从而能够减少方石英析晶，其次，氮化硅被氧化，消耗了一定量的氧，并且氧化所产生的粘性流动态非晶质SiO2促进了石英陶瓷的烧结，而在整个烧结过程中，由于无其他外界致因使其产生断键重建式相变，故不发生方石英化，同时加入的碳粉，可以在高温烘焙过程中发生氧化，吸收石英坩埚材料中的氧组分。
The invention belongs to the technical field of crucible processing, particularly relates to a high-strength and high-toughness quartz crucible additive, and provides the following scheme aiming at the technical problems that crystals are easy to separate out in the heating process of an existing quartz crucible and the performance of the crucible is easy to reduce: the high-strength and high-toughness quartz crucible additive comprises polyoxyethylene, Si3N4, a surfactant, talcum powder, carbon powder and ceramic powder. According to the method, combination with oxygen is reduced, so that crystallization of cristobalite can be reduced, silicon nitride is oxidized, a certain amount of oxygen is consumed, viscous flow dynamic amorphous SiO2 generated by oxidation promotes sintering of the quartz ceramic, and in the whole sintering process, broken bond reconstruction type phase change is generated due to the fact that no other external causes exist, so that the sintering performance of the quartz ceramic is improved. Meanwhile, the added carbon powder can be oxidized in the high-temperature baking process to absorb the oxygen component in the quartz crucible material.
本发明属于坩埚加工技术领域，尤其是一种高强高韧石英坩埚添加剂，针对现有石英坩埚加热过程容易析出晶体，容易导致坩埚性能下降的技术问题，提出以下方案，包括聚氧化乙烯、Si3N4、表面活性剂、滑石粉、碳粉和陶粉。本发明降低了与氧的结合，从而能够减少方石英析晶，其次，氮化硅被氧化，消耗了一定量的氧，并且氧化所产生的粘性流动态非晶质SiO2促进了石英陶瓷的烧结，而在整个烧结过程中，由于无其他外界致因使其产生断键重建式相变，故不发生方石英化，同时加入的碳粉，可以在高温烘焙过程中发生氧化，吸收石英坩埚材料中的氧组分。
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