Segregation of anion (Cl−) impurities at transparent polycrystalline α-alumina interfaces

Segregation of anion (Cl−) impurities at transparent polycrystalline α-alumina interfaces

Feature Article Segregation of anion (Cl−) impurities at transparent polycrystalline -alumina interfaces Abhishek Tewari a,∗, Farhang Nabiei b,c, Marco Cantoni b, Paul Bowen a, Cécile Hébert b,c a Laboratory of Powder Technology, École Polytechnique Federale de Lausanne, CH-1015, Switzerland b Centre Interdisciplinaire de Microscopie Electronique, École Polytechnique Federale de Lausanne, CH-10...

Nanopore Characterization and Optical Modeling of Transparent Polycrystalline Alumina

Production of transparent ceramics has become a topic of resurgent interest in recent years, with its promise of near-net shaping appealing to applications ranging from biomedicine to solar energy. However, the mechanisms governing ceramic transparency, translucency, and opaqueness are not entirely understood. Models of both grain boundary and pore scattering have been proposed, but too often w...

Transparent polycrystalline alumina using spark plasma sintering: Effect of Mg, Y and La doping

ransparent polycrystalline alumina (PCA) is a promising replacement for sapphire. Its optical properties however are highly dependent on the rain size and residual porosity which need to be controlled for real inline transmittances (RIT), that are high enough for possible applications. To achieve high RITs, doping as well as pressure assisted sintering is often used. In this study spark plasma ...

Grain Boundaries in Polycrystalline Alumina

Segregation of Interstitial Impurities at Grain Boundaries in Transition Metals