Acceleration of the synthesis of single B-YB2SI2O7 feedstocks through modifying the grain size of SIO2

Abstract

Abstract The purpose of this study is to create single-phase β-Yb2Si2O7 feedstocks. Firstly, the single-phase β Yb2Si2O7 feedstocks were synthesized by using a micro-nano compound method. By adjusting the grain size of SiO2, the synthesis of β-Yb2Si2O7 was accelerated, and its mechanism was further investigated. Based on this, the appearance and phase structure of β-Yb2Si2O7 were studied, and the physical properties of β-Yb2Si2O7 were characterized. The results reveal that in the solid-phase synthesis of β-Yb2Si2O7, nano SiO2 exhibits greater advantages compared to micron SiO2 due to its nano-adsorption capacity and heightened reactivity when reacting with Yb2O3. This enhanced reactivity accelerates the production of β-Yb2Si2O7. When the molar ratio of Yb2O3 and SiO2 is 1:2.3, the single phase β-Yb2Si2O7 feedstocks were effectively manufactured by sintering at 1, 500°C for one hour. The β-Yb2Si2O7 feedstocks have a particle size distribution with d 10, d 50, and d 90 values of 20.56 μm, 33.85 μm, and 52.65 μm, respectively. The β-Yb2Si2O7 feedstocks have apparent and tap densities of 1.66 g/cm3 and 2.05 g/cm3, respectively. In summary, single-phase β-Yb2Si2O7 feedstocks can be the preferred materials for EBCs.