We study crystallographically textured thermoelectric materials with electronic conductivity based on bismuth telluride doped samarium (Bi 2-x Sm x Te 2.7 Se 0.3 , where x=0, 0.05, 0.02, 0.05) obtained by the method of solvothermal synthesis and double pressing spark plasma sintering. The crystallographic texture was achieved sintering plate-like nanoparticles. texturing axis [001] coincided di...

spark plasma sintering (sps) method, as plasma activated sintering, is a method applicable for rapid sintering of metals and ceramics. owing to the advantage of rapid heating, the alumina ceramics obtained by sps have a grain size and density comparable to those of hot pressed ones. the increase of densification rate may be related to some difference in ion transport characteristics. this study...

This study aimed to evaluate the effect of flask types, post-pressing times and base regions on the base adaptation of maxillary and mandibular complete dentures. Denture bases were waxed in stone casts and randomly divided into six groups (n=10), according to conventional and double flasks inclusion, and immediate and 6 hours post-pressing times. Denture bases were polymerized in water bath at...

Si3N4/BN fibrous monoliths were prepared with 4 wt% Y2O3 added as a sintering aid to the Si3N4. Residual carbon, present in the billet before hot-pressing, was shown to influence the final microstructure. The sintering aid glass, known to migrate into the BN cell boundaries during hotpressing, was not sufficient in quantity to prevent premature shear failure when samples were tested in flexure....

ceramic ultrafiltration membranes are considered as an alternative for the treatment of both stable water-in-oil and oil-in-water emulsions proved to be more effective in comparison with other conventional techniques. in this study, symmetric macro-porous ceramic membranes are prepared through dry pressing of α-alumina powder and the addition of various binders including poly (vinyl alcohol). t...

dye sensitized solar cell was fabricated from a double layer photoanode. first, tio2 nanoparticles  were synthesized by hydrothermal method. these tio2 nps were deposited on fto glasses by electrophoretic deposition  method in applied voltage of 5 v and epd time of 2.5-10 min. then tio2 hollow spheres (hss) were synthesized by sacrificed template method with carbon spheres as template and ttip ...

We investigated the dynamic phase transitions (DPTs) in mixed spin (2, 5/2) Blume-Emery Griffiths model with repulsive biquadratic interaction presence of a time-varying magnetic field. used path probability method to obtain set equations. numerically solved these equations characterize nature first- and second-order find DPT temperatures as well phases system. constructed diagrams (DPDs) reduc...

Selenium compounds, such as diphenyl diselenide (DPDS), have been shown to exhibit biological activity, including antioxidant effects. However, the use of DPDS in pharmacology is limited due to in vivo pro-oxidative effects. In addition, studies have shown that DPDS-loaded nanocapsules (DPDS-NCS) have greater bioavailability than free DPDS in mice. Accordingly, the aim of this study was to inve...

Laser micro sintering (LMS) is a process of manufacturing microscale parts and/or features by laser sintering. Small powder particles (e.g., on the order ~1 ?m) are often used for good spatial resolutions. Besides, pulsed lasers employed due to related potential advantages. For mechanical properties, laser-based LMS typically desires high densification sintered material, which is, however, more...