Influence of mechanochemical activation of a charge on properties of mullite-tialite materials

The influence of mechanochemical activation (MCA) of a kaolin-containing charge on the strength of mullite-tialite materials (obtained using methods of semidry molding and polymeric matrix duplication) was studied. It is shown that spectral and X-ray indexes of crystallinity of kaolin activated under similar conditions could be used as criteria of MCA efficiency. Parameters of mullite-tialite charge (containing kaolin, alumina and anatase) activation were optimized.

Mechanochemical activation of batch during fabrication of highly-porous cordierite materials based on natural oxide compounds

Using X-ray diffraction analysis and infrared spectroscopy techniques, the effect of additives on phase composition variation during mechanochemical activation of a kaolin-containing cordierite batch was investigated. It was shown that introduction of Trilon B permits fixing of the start of cordierite synthesis already during batch activation. It was established that mechanochemical activation of a cordierite batch doped with Trilon B results in an increase of the strength of cordierite samples prepared by polymer matrix duplication

Sintering nanodisperse zirconium powders with various stabilizing additives

Effect of various stabilizing additives on sintering kinetics of nanodisperse powders was studied by thermomechanical analysis. Temperature ranges of the most intense shrinking, characteristic points of shrinking rate changes were established. Peaks characterizing the most intense shrinking of nanodisperse zirconium powder samples were shown to allow to arrange the stabilizing additives as follows: Y2O3→CeO2→TiO2

Titania powder activation and rutile ceramics structure formation

Impact of mechanochemical activation (MCA) in aqueous medium with various organic additives on commercial titania powder and products made of it has been investigated by X-ray diffraction, optical microscopy and Raman spectroscopy. Agar-agar additive has been shown to offer promise for activation of titania powders used in obtaining both dense and porous materials