Reactivity of metallic palladium in a K2CO3-K2O-B2O3-Al2O3 melt

Measuring and Modeling Viscosity of CaO-Al2O3-SiO2(-K2O) Melt

The effect of K2O on viscosity in CaO-SiO2-Al2O3 melt has been measured by a rotating spindle viscometer. It is indicated from the experimental results that viscosity first increases then decreases with the increasing content of K2O; the maximum viscosity occurs in the field of K2O/ Al2O3 > 1. After gradually adding K2O, the transformation of bridging oxygen (from being bonded with Al ion charg...

Investigation of crystallization and sinterability properties of BaO-Al2O3-SiO2 glass-ceramics containing K2O and B2O3

BaO -SiO2-Al2O3 glass ceramics containing K2O and B2O3 were prepared using conventional melting of powered batches, quenching in water and crystallization of sintered glass. XRD patterns introducehexacelsian and celsian as two major crystallized phases in sintered glass-ceramics. Presence of K2O enhances crystallization of hexacelsianin comparison withB2O3.Observations showed sintering temperat...

بررسی اثر Li2O بر خواص شیشه- سرامیک ها بر پایه TiO2 – F – (Li2O) K2O - B2O3 - MgO- Al2O3 - SiO2

MICROWAVE SYNTHESIS OF B4C–Al2O3 COMPOSITE IN A MECHANICALLY ACTIVATED Al/B2O3/C POWDER MIXTURE

B4C–Al2O3 composite powder was produced by aluminothermic reduction in Al/B2O3/C system. In this research, microwave heating technique was used to synthesize desired composite. The ball milling of powder mixtures was performed in order to study the effect of mechanical activation on the synthesis process. The synthesis mechanism in this system was investigated by examining the correspondi...

بررسی اثر li2o بر خواص شیشه- سرامیک ها بر پایه tio2 – f – (li2o) k2o - b2o3 - mgo- al2o3 - sio2