Surface modification and dispersion of silicon nitride and silicon carbide powders

Control of the photocatalytic activity of TiO2 nanoparticles by silica coating with polydiethoxysiloxane

“…It can be seen that, compared with the spectrum of non-coated TiO 2 , a dominant broad band at 1040e1187 cm À1 was present in the spectra of the silica coated TiO 2 particles obtained using both methods. This peak can be assigned to (SieOeSi) asymmetric stretching vibration and confirms the silica coating of TiO 2 [16].…”

Synthesis of Sr2SiO4 nanometer particles from the core–shell precursor of SrCO3/SiO2

“…The absorption peaks at 1768, 1450, 1070, 860, 706 and 699 cm −1 are assigned to SrCO 3 stretching characteristics [12]. Si-O-Si (800 cm −1 [13] and 1000-1200 cm −1 [14]) and Si-OH (970 cm −1 [15]) were also observed, indicating the formation of SiO 2 with a small amount of silanol groups. Fig.…”

Preparation of nasal cavity-like SiC–Si3N4 foams with a hierarchical pore architecture

“…Considering powders with multi-components, more difficulties might be expected in obtaining a well stabilized and homogeneous slurry due to hetero-coagulation and competitive adsorption. 46 In conclusion, the steric or electrosteric stabilization requires strongly attached and dense layers of polymer or polyelectrolyte on the particle surfaces. Therefore, the use of a proper dispersing agent is necessary.…”