Low-Temperature Synthesis of Forsterite (Mg₂SiO₄) via Solid-State Reaction
Abstract
In this study, ceramic forsterite was synthesized at low temperatures using amorphous silica and magnesium oxide powders derived from sodium disilicate and magnesium chloride hexahydrate, respectively. The influence of reaction temperature on forsterite formation was examined. The resulting powders were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), thermal analysis, and N₂ adsorption isotherms. The results show that the synthesized silica and magnesium oxide nanopowders have significant surface areas, with specific surface area (SSA) values of 148m²/g for silica at 200°C and 100m²/g for magnesium oxide at 600°C. XRD and differential scanning calorimetry (DSC) indicate that forsterite forms at approximately 750°C, with high purity confirmed by XRD and EDS. This study demonstrates that using amorphous and fine particle raw materials promotes forsterite formation at lower temperatures than previously reported.
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