Recent research has been significantly increased our fundamental understanding of microwave interactions with materials. Thermal absorption has been demonstrated to result from simultaneous action of multiple dissipation mechanisms during processing. In addition, it has been conclusively established that strong microwave fields exert a non-thermal driving force during sintering. This force acts...

Coal fly ash with the addition of Al₂O₃ was recycled to produce mullite/alumina composites and the camphene-based freeze casting technique was processed to develop a controlled porous structure with improved mechanical strength. Many rod-shaped mullite crystals, formed by the mullitization of coal fly ash in the presence of enough silicate, melt. After sintering at 1300-1500 °C with the initial...

Due to its good spatial resolution, the YAG:Ce screen monitor is often used for small beam profile measurement in the Linac and beam transport line. We constructed a high-resolution YAG:Ce screen monitor at KEK-ATF2 for the observation of small size beam. We tested two types of screen, one is ceramic (sintered alumina powder) YAG:Ce and the other is single crystal YAG:Ce. Both screens have 50μm...

The paper reports on a current research on fluidised bed gasification of biomass and coals. The focus is on the bed material agglomeration and fragmentation phenomena that are well known to affect the reliability and the efficiency of fluidized bed combustion processes. Preliminary results of dedicated tests at high temperature are reported and discussed in the paper. On the whole, agglomeratio...

In this research, the fabrication of transparent Alumina was done by spark plasma sintering (SPS). Two types alpha and gamma powders with particle size 200 50 nm were used, respectively. The assisted materials used in research magnesium nitrate lanthanum nitrate, each which 100 ppm using a chemical precipitation process. Calcination performed at 800°C resulting subjected to SPS 1500 °C rate °C/...

Ceramic-based hollow spheres are considered a great driving force for many applications such as offshore buoyancy modules due to their large diameter to wall thickness ratio and uniform wall thickness geometric features. We have developed such thin-walled hollow spheres made of alumina using slip casting and sintering processes. A diameter as large as 50 mm with a wall thickness of 0.5-1.0 mm h...

• As a result of grain size reduction, strength and hardness for 10Ce-1CaO 10Ce-1CaO-5Al2O3 increased compared to 10Ce-TZP. Aging resistance in all 10Ce-1CaO/ alumina composites. Measurement K I c by SEVNB VIF methods corroborate the difference between values obtained both methods. Ceria-stabilized zirconia-based composites have been developed aiming obtain ceramic materials with enhanced hardn...