| 摘要 |
A mixed silicon-aluminum oxide powder, produced by flame hydrolysis and having an amorphous structure with primary particles containing nano-crystallites, is new. A mixed silicon-aluminum oxide powder, having the composition 1-99.999 wt.% Al2O3 and balance SiO2 and produced by flame hydrolysis, has an amorphous structure (as shown by x-ray diffraction), consists of co-grown primary particles containing crystallites of 1-200 nm size and has a specific surface of 5-300 m<2>/g. An Independent claim is also included for production of the mixed oxide by evaporating silicon and aluminum halides in a specific ratio, uniformly mixing with a carrier gas of air, oxygen and hydrogen, combusting the mixture in a burner and, after separating solids from the gas phase, removing any halide residues adhering to the product by treating with moist air at elevated temperatu |
