In this study, we investigate the deposition of high-k dielectric materials, namely Al2O3 and HfO2, using atomic layer for 4H-SiC metal-oxide-semiconductor applications. C-V measurements reveal that HfO2/SiO2/Al2O3/4H-SiC structure exhibits lower interface state density (Dit) a reduced number fixed trap charges (Neff) than HfO2/Al2O3/SiO2/4H-SiC structure. Furthermore, observe significant degra...

With a view to understanding the performance of blast furnace slag with high Al2O3 content, effects w(MgO)/w(Al2O3), w(CaO)/w(SiO2), and w(Al2O3) on melting (melting characteristic temperature heat) content were investigated by differential scanning calorimeter (DSC) method. Experimental results indicate that end (Tend) for almost all slags has no obvious change increase w(CaO)/w(SiO2) will rai...

Cleaner production of alloys is great significance to the protection ecological environment. At present, it has received widespread attention all over world. Chromite smelting reduction direct alloying an important process in stainless steel, which can make full use chromite resources, thereby reducing costs and preventing environmental damage caused by traditional processes. In order reveal di...

We report a detailed investigation of the structural and chemical characteristics of thin evaporated Al2O3 tunnel barriers of variable thickness grown onto single-layer graphene sheets. Advanced electron microscopy and spectrum-imaging techniques were used to investigate the Co/Al2O3/graphene/SiO2 interfaces. Direct observation of pinhole contacts was achieved using FIB cross-sectional lamellas...

Stable nanolubricant mixtures are interrelated with thermal conductivity enhancement, thus improving heat transfer performance in automotive air conditioning (AAC) systems. This paper studies the stability and of double-end capped polyalkylene glycol (PAG)-based nanolubricants specially designed for R1234yf refrigerant. Mono (Al2O3/PAG SiO2/PAG) hybrid (Al2O3–SiO2/PAG) were prepared using a two...

In this study, iron tailings were used as raw materials mixing with Al2O3, SiO2, and/or CaO sintered at 950–1400 °C to produce glass ceramics. Al2O3/tailing and Al2O3/SiO2/tailing systems, the newly formed crystalline mullite (3Al2O3·2SiO2) reached its maximum content of 83.7 wt% for sample mass ratio 6/2/2. Al2O3/SiO2/CaO/tailing system, anorthite (CaAl2Si2O8) increased 72.9 7/8/4/6 1450 °C. T...

The IR spectra of bulk Nb2O5‚nH2O and niobia supported on SiO2, Al2O3, ZrO2, and TiO2 were recorded in the fundamental and overtone NbdO regions, as well as in the hydroxyl region, to develop a better understanding of the structural models of surface NbOx species. The coincidence of the IR and Raman fundamental NbdO frequency in Nb2O5/Al2O3, Nb2O5/ZrO2, and Nb2O5/TiO2 provides the strongest evi...