| 摘要 |
An object of the present invention is to provide a powder capable of easily being re-dispersed into an inorganic oxide substantially not aggregated even after the inorganic oxide having a small particle diameter is dried. The invention relates to a powder obtained by treating a hydrous dispersion of an inorganic oxide having an average particle diameter measured by a dynamic light scattering method, D1, of 3 nm to 1 mum, with a silane coupling agent followed by drying, wherein the powder has an average particle diameter at the time when re-dispersed in a dispersing medium, D2, satisfying the following formula (1): 1<=D2/D1<=2 (1) |
