THERMAL CHARACTERISTICS OF FUSED SILICA CERAMIC WASTE AND ITS APPLICATION IN CASTING

Yongheng Zhou; Keya Shen; Qun Zeng

doi:10.17073/1683-4518-2013-12-30-32

THERMAL CHARACTERISTICS OF FUSED SILICA CERAMIC WASTE AND ITS APPLICATION IN CASTING

Yongheng Zhou, Keya Shen, Qun Zeng

https://doi.org/10.17073/1683-4518-2013-12-30-32

Full Text:

Abstract

Cristobalite SiO₂ can be obtained from the fused silica ceramic waste of ploysilicon plant, due to the phase conversion of fused silica to cristobalite during the process of polysilicon ingot. Cristobalite powder materials with high purity are manufactured by milling the discarded waste above. Thermal expansion rate of the cristobalite and gypsum bonding moulds were studied, which show that the thermal expansion of the cristobalite phase transition could effectively compensate for the shrinkage of the gypsum at the temperature between 200 °C and 400 °C. Casting experiments with copper alloy show that the cristobalite can improve the thermal performance of moulds for precise casting of jewelry. Ill. 6. Ref. 11. Tab. 1.

Keywords

cristobalite, thermal expansion, moulds for precise casting of jewelry,

About the Authors

Yongheng Zhou

Нормальный университет Южного Китая, Гуанчжоу
China

Keya Shen

Институт ювелирных изделий при Политехническом институте Гуанчжоу Панью, Гуанчжоу
China

Qun Zeng

Нормальный университет Южного Китая, Гуанчжоу
China

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Supplementary files

For citation: Zhou Y., Shen K., Zeng Q. THERMAL CHARACTERISTICS OF FUSED SILICA CERAMIC WASTE AND ITS APPLICATION IN CASTING. NOVYE OGNEUPORY (NEW REFRACTORIES). 2013;(12):30-32. https://doi.org/10.17073/1683-4518-2013-12-30-32

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