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Effects of Heating Rate on the Thermal and Mechanical Properties of the Bauxite-Based Low-Cement Refractory Castables
Journal of Materials Engineering and Performance ( IF 2.3 ) Pub Date : 2020-09-06 , DOI: 10.1007/s11665-020-05079-z
Hajar Ahmadi Moghadam , Seyed Mohammad Arab

This study was conducted to investigate the effects of sintering conditions on the phase composition, microstructure, and physico-mechanical properties of the bauxite-based low-cement refractory castables. For this purpose, the specimens were sintered at various temperatures (1350-1450 °C) and heating rates (3-10 °C/min). Results showed that the sintering conditions have a remarkable effect on the physico-mechanical properties of the refractory castables. The mechanical strength was considerably increased by increasing the heating rate from 3 to 10 °C/min which was attributed to lower amounts of porosity and higher amount of the platy crystals of CA6 phase. The lower porosity of the specimens sintered at lower temperature with 10 °C/min of heating rate also resulted in the higher mechanical strength. The results obtained in this study showed a negative linear relationship between the cold crushing strength and porosity of the specimens with a high degree of measurement conformity.



中文翻译:

加热速率对铝土矿低水泥耐火浇注料热力学性能的影响

进行这项研究是为了研究烧结条件对铝土矿基低水泥耐火浇注料的相组成,微观结构和物理力学性能的影响。为此,在各种温度(1350-1450°C)和加热速率(3-10°C / min)下烧结样品。结果表明,烧结条件对耐火浇注料的物理力学性能有显着影响。通过将加热速率从3°C / min增加到10°C / min,可显着提高机械强度,这归因于孔隙率较低,CA6相的片状晶体含量较高。在较低温度下以10°C / min的加热速率烧结的较低孔隙率样品也导致较高的机械强度。

更新日期:2020-09-07
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