Low Temperature Preparation of β-CaSiO₃ Nanopowder via Coprecipitation Process

β-CaSiO₃ powders were synthesized through a chemical coprecipitation process by using Ca(NO₃)₂·4H₂O and Si(OC₂H₅)₄ as raw materials. The effects of the precipitating agent, dropping way of precipitant, temperature and solvent on the preparation ofβ-CaSiO₃ powders were investigated systematically. The morphology and specific surface area ofβ-CaSiO₃ powders were characterized by means of XRD, SEM and BET. The results showed that well-distributed intermediate products were obtained by using NaOH as precipitant, ethanol as solvent and adding NaOH solution drop by drop at 25 °C. Pureβ-CaSiO₃ was obtained by heating the intermediate product at 680 °C for 2 h. Rod-likeβ-CaSiO₃ crystals were obtained at 700 °C as observed by SEM.