In this study, we demonstrate the stability of highLa2O3 metal–insulator–metal (MIM) capacitors under constant voltage stress (CVS). It was found that the variation in capacitance caused by CVS strongly depends on the injected charges regardless of stress biases. Furthermore, the quadratic voltage coefficient of capacitance ( ) decreases with a logarithmic increase in dielectric loss. Charge tr...

The physico-chemical changes occurring during the high-temperature phase transformation of monazite in presence Na2CO3 at 1000 °C for 2 h duration monazite: ratios between 1.0 and 5.0, were investigated. formation sodium lanthanide phosphates was prevalent above a monazite:alkali ratio 2, however, below this ratio, dephosphorization as Na3PO4 Ce1-xLnxO2-x/2 solid solutions occur offering unique...

An egg-shell Pd/Al2O3 catalyst showed higher activity than a regular Pd/Al2O3 catalyst in the partial oxidation of methane to syngas, but a common problem of this reaction is the catalyst deactivation on stream. We attempted to modify the egg-shell catalyst via impregnation with some metal oxide additives. Although the addition of MgO did not show any beneficial effect, the addition of CaO and/...

Development of a transition metal based catalyst aiming at concomitant high activity and stability attributed to distinguished catalytic characteristics is considered as the bottleneck for dry reforming methane (DRM). This work highlights role modifying zirconia (ZrO2) alumina (Al2O3) supported nickel catalysts using lanthanum oxide (La2O3) varying from 0 20 wt% during methane. The mesoporous w...

In this study, TiB + La2O3/Ti-6Al-4V composites were successfully prepared by in situ reaction using selective laser melting technology. The effect of LaB6 content on the fabrication quality, microstructure evolution and mechanical properties composite samples was investigated. results show that relative density sample gradually decreased from 98.56% to 96.57% as increased 0 wt% 3 wt%. With inc...

La-based perovskites are versatile materials that of interest for solid oxide fuel cells and electrocatalytic water splitting. During fabrication composition spread thin-film libraries La—Co-based systems, an unusual phase formation phenomenon is observed: instead the expected continuous gradient, single-phase regions with homogeneous form (La2O3 or stoichiometric La-perovskite). This phenomeno...

Time-dependent dielectric breakdown (TDDB) characteristics of La2O3-doped high-k dielectric in Hf-based high-k/TaN metal gate stack were studied. Unlike the abrupt breakdown in the conventional SiO2, dielectric breakdown behaviors of La-incorporated HfON and HfSiON dielectrics show progressive breakdown characteristics. Moreover, the extracted Weibull slope β of breakdown distribution is in the...