Recent advance and prospectives of electrocatalysts based on transition metal selenides for efficient water splitting

Fabrication of transition metal selenides and their applications in energy storage

Study of optical properties of thermally evaporated ZnSe thin films annealed at different pulsed laser powers

Physical properties of rf-sputtered ZnS and ZnSe thin films used for double-heterojunction ZnS/ZnSe/CdTe photovoltaic structures

https://iopscience.iop.org/article/10.1088/2053-1591/ab6779/pdf

Structure and optical properties of polycrystalline ZnSe thin films: validity of Swanepol’s approach for calculating the optical parameters

Synthesis of thermally evaporated ZnSe thin film at room temperature

The effect of Ni/Cu-coating residuals on the magnetic properties and microstructures of samarium–cobalt (SmCo5) magnets was studied. SmCo5 magnets with 0.0, 0.5, 1.0, 2.0, 3.0 and 4.0 wt.% of added Ni/Cu (85 wt.% Ni/15 wt.% Cu) were prepared using a conventional sintering route. The magnetic properties of the magnets were found to be consistent up to 2 wt.% Ni/Cu. Any further increase in the Ni/Cu content resulted in a significant reduction in the magnetic properties, to lower than values that would be commercially acceptable. SEM/EDS studies showed that two major phases, i.e., the SmCo5 matrix phase and Sm2O3 were present in all the sintered SmCo5 magnets. The presence of Sm2Co7 as a minor phase fraction was detected in the sintered SmCo5 magnets containing up to 2 wt.% Ni/Cu. A 2 wt.% Ni/Cu addition to magnets resulted in the presence of two new phases with compositions close to SmCo and Sm2Co17 in addition to SmCo5 and Sm2O3 as major phases in the SEM-observed microstructure. These newly formed phases are present in small fractions and are presumably homogenously distributed at the grain boundaries of the magnets. As they are known to act as nucleation sites for reverse magnetic domains, they effectively reduce the intrinsic grain boundary magnetic strength, leading to a drop in the coercivity. We concluded that the sintered SmCo5 magnets could be recycled with up to 2 wt.% Ni/Cu as a residual from the coating under our sintering and heat treatment conditions.

/pdf/effects-of-ni-and-cu-residuals-on-the-magnetic-properties-35a5ya5d.pdf

Muhammad Farhan Mehmood

Papers

Synthesis of thermally evaporated ZnSe thin film at room temperature

Effects of Ni and Cu Residuals on the Magnetic Properties and Microstructure of SmCo5 Magnets