Results 111 to 120 of about 613 (173)

Mineralogy of Historic Scheelite Mine Tailings at Glenorchy, Otago, New Zealand

open access: yesNew Zealand Journal of Geology and Geophysics, Volume 69, Issue 2, June 2026.
Otago Schist orogenic mineral deposits with scheelite and gold in the Glenorchy area are mineralogically and geochemically similar to, but structurally different from, those at the active Macraes gold mine in East Otago. Glenorchy veins were mined for scheelite up to 1970s, and an abandoned processing battery site at Glenorchy is now being managed for ...
Dave Craw   +2 more
wiley   +1 more source

Alloy Solutions for Ammonia Cracking: A Review

open access: yesMaterials and Corrosion, Volume 77, Issue 6, Page 923-934, June 2026.
This work provides a literature overview of the nitriding and degradation of structural materials under ammonia cracking conditions and explains the known mechanisms and the gaps, where research is required. ABSTRACT Hydrogen is a key factor in energy storage and transportation, which will inevitably lead to a substantial increase in demand.
Mathias Christian Galetz   +3 more
wiley   +1 more source

Laser Sintering and Optical Characterization of LuAG: Ce Ceramics

open access: yesphysica status solidi (b), Volume 263, Issue 6, June 2026.
Additive‐free densification of LuAG:Ce ceramics is achieved via CO2 laser sintering within seconds, producing high‐density and homogeneous microstructures compared to conventional processing. However, laser‐sintered samples exhibit enhanced oxygen vacancy concentrations, leading to reduced photoluminescence intensity and a red shift in emission.
Eliane Pinheiro Silva   +8 more
wiley   +1 more source

Superconductivity in Gallium‐Doped Germanium‐on‐Insulator Through Ion Implantation and Flash‐Lamp Annealing

open access: yesphysica status solidi (RRL) – Rapid Research Letters, Volume 20, Issue 6, June 2026.
Superconducting Ge‐on‐insulator is achieved through nonequilibrium hyperdoping technologies by combining ion implantation and flash‐lamp annealing. The work highlights the potential of GeOI for scalable hybrid semiconductor–superconductor and future quantum devices.
Yu Cheng   +8 more
wiley   +1 more source

Tuning Y‐Mg Supports for Improved Ni‐Catalyzed NH3 Decomposition: Structural Modulation and Mechanistic Insights

open access: yesRare Metals, Volume 45, Issue 6, June 2026.
ABSTRACT Catalytic NH3 decomposition has garnered substantial attention for hydrogen transformation and storage. Ni‐based catalysts continue to suffer from limited thermal stability and suboptimal low‐temperature activity, largely attributed to an incomplete understanding of the structure‐activity relationships and reaction mechanisms governing their ...
Tao Wen   +8 more
wiley   +1 more source

Unlocking Energy Potential: Exploiting Anionic Redox Activity in Na‐Based Layered Oxides

open access: yesSmall, Volume 22, Issue 33, 12 June 2026.
Anionic redox in Na‐based layered oxide cathodes unlocks additional capacity beyond conventional transition‐metal redox limits, enabling high‐energy sodium‐ion batteries. This review elucidates coupled cationicanionic redox mechanisms across P2‐, O3‐, and related structural phases, while critically addressing key challenges such as voltage hysteresis ...
Neeraja Nair   +6 more
wiley   +1 more source

Giant Bulk Photovoltaic Effect in Crystal Orientation Restructured Quasi‐Epitaxial BaTiO3 Films on Silicon Substrates

open access: yesSmall, Volume 22, Issue 31, 2 June 2026.
ABSTRACT The bulk photovoltaic (BPV) effect in ferroelectric (FE) materials enables the direct conversion and exchange of information between the optical and electrical domains in applications such as photonic computing and photodetection. Although the above‐bandgap open‐circuit voltage in the FE BPV effect permits a much higher photovoltage in ...
Wenzhong Ji   +11 more
wiley   +1 more source

3D‐Printed Na3V2(PO4)3 Electrodes for Symmetric Sodium‐Ion Batteries

open access: yesSmall Structures, Volume 7, Issue 6, June 2026.
Vat photopolymerization 3D printing is used to fabricate current collector‐free Na3V2(PO4)3 (NVP) electrodes with complex lattice geometries. After thermal postprocessing, the printed electrodes operate reversibly as both positive and negative electrodes in a symmetric sodium‐ion battery.
Ana C. Martinez   +12 more
wiley   +1 more source

Investigation of the Effect of Processing and Sintering Parameters on Voltage-Dependent Variable Resistors for Controlling Voltage and Leakage Current in ZnO-Based Compositions

open access: yesمواد نوین
Introduction: Voltage-dependent resistors, known as varistors, have wide applications in the electrical and electronic industries due to their protective role against the destructive effects of sudden voltage spikes. This research investigates the impact
Mohammad Jazirehpour, Miad Maleki
doaj  

Residual Cement Excess of Composite Versus Glass Ionomer Cement in Implant‐Supported Single Crowns After Different Intraoral Exposure Times—A Randomized Controlled Clinical Trial

open access: yesClinical Oral Implants Research, Volume 37, Issue 6, Page 714-721, June 2026.
ABSTRACT Objective To evaluate the frequency and quantity of residual cement after cementation of monolithic zirconia crowns with glass ionomer or resin composite cement on customized ceramic abutments, following different intraoral retention times. The influence of margin location, quadrant and implant region was also assessed.
Maria Weinreuter   +4 more
wiley   +1 more source

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