Abstract The aim of the study was to investigate the effect of amorphous silica on the phase formation and study the physical characteristics of forsterite refractory prepared from quartz and MgO powder. Various samples were subjected to sintering temperature around 1100 °C and development of forsterite phase was characterized using Fourier Transform Infrared (FTIR) spectroscopy, X-ray diffraction (XRD), and scanning electron microscopy (SEM). The result indicate that the addition of rice husk ash (RHA) significantly affect the formation of forsterite phase. As the amount of RHA increased, it led to a better reaction between amorphous silica and periclase, later that will transform into forsterite phase at a temperature around 1100 °C. Formation of forsterite resulted in decrease of density, porosity, and thermal conductivity, while the opposite was observed for Cold Crushing Strength. Formation of forsterite phase was identified by XRD analysis of the sample. Based on the characteristics, the samples were considered as an insulator and of the potential use as refractory devices.

中文翻译：

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高丰度无定形稻壳二氧化硅保温隔热材料制备镁橄榄石耐火材料

摘要 本研究的目的是研究无定形二氧化硅对相形成的影响，并研究由石英和氧化镁粉制备的镁橄榄石耐火材料的物理特性。各种样品经受大约 1100 °C 的烧结温度，并使用傅立叶变换红外 (FTIR) 光谱、X 射线衍射 (XRD) 和扫描电子显微镜 (SEM) 表征镁橄榄石相的发展。结果表明，稻壳灰(RHA)的添加显着影响镁橄榄石相的形成。随着 RHA 量的增加，它导致无定形二氧化硅和方镁石之间更好的反应，随后在 1100°C 左右的温度下转变为镁橄榄石相。镁橄榄石的形成导致密度、孔隙率和热导率的降低，而冷压强度则相反。通过样品的XRD分析确定镁橄榄石相的形成。基于这些特性，样品被认为是绝缘体并且有可能用作耐火器件。