Dual-ion substituted (MeY)3(AlSi)5O12:Eu garnet phosphors: combinatorial screening, reductive annealing, and luminescence property

A new strategy of the combination double substitution of cations and annealing creates the coexistence of activator Eu-ions with a mixed-valence state.

Synthesis of Magnetic Wires from Polyol-Derived Fe-Glycolate Wires

Fe-glycolate wires with micrometer-scale lengths can be synthesized by the polyol process. Although the as-produced wires are in the paramagnetic state at room temperature, they are transformed into ferrimagnetic iron oxides and ferromagnetic metallic iron wires by reductive annealing. The shape of the wires is unchanged by reductive annealing, and it is possible to control the magnetic properties of the resulting wire-shaped ferri/ferromagnets by adjusting the annealing conditions. Consequently, the reductive annealing of polyol-derived Fe-glycolate wires is an effective material-processing route for the production of magnetic wires.

A unique synthesis of rare-earth-Co-based single crystal particles by “self-aligned” Co nano-arrays

Rare-earth-Co-based single crystal particles were synthesized by reductive annealing of “self-aligned” CoNRs@Sm2O3 nano-arrays without stabilizer coating.

Concave curvature facets benefit oxygen electroreduction catalysis on octahedral shaped PtNi nanocatalysts

PtNi alloy nano-octahedra after thermal reductive annealing: imperfect PtNi octahedra with concave Pt curvature catalytically outperform well-alloyed cuboctahedral nanoparticles with {111} and {100} nanofacets in electrochemical ORR.

Synthesis of Sm–Co nanoparticles by sol–gel method

Sm–Co nanoparticles have promising applications in both scientific and industrial fields. In this paper, Sm–Co single-crystal nanoparticles were prepared using respective metal salts and complexing agents, such as citric acid by Pechini-type sol–gel method. The mixture solution was heated to form a highly viscous gel, and then heated at different temperatures to achieve SmCo-oxide. And then Sm–Co particles were yielded by reductive annealing of the precursors. Phase analysis, microstructural investigation and magnetic properties were performed by X-ray diffraction (XRD), field emission scanning electron microscope (FESEM), Fourier transform infrared (FT-IR) and VSM. TGA trace analysis of the gel determined the heat treatment temperature. XRD results showed that SmCoO3 and Co3O4 were obtained at 800[Formula: see text]C, FT-IR spectrometry analysis also verified the results. In the calcium-thermal reduction process, Sm2O3 and Co were obtained after reductive annealing at 800[Formula: see text]C, meanwhile Sm–Co nanoparticles were formed at 850[Formula: see text]C. FESEM analysis revealed that the Sm–Co nanoparticles were composed in the form of spherical granules and exhibited well distribution with size in the range of 100 nm. The room temperature saturation magnetization and coercivity of the Sm–Co nanoparticles were 49.61 emu/g and 3.53 kOe, respectively.

A novel strategy to synthesize anisotropic SmCo5 particles from Co/Sm(OH)3 composites with special morphology

In this study, we report a new strategy for preparing magnetically anisotropic SmCo5 single crystal particles by reductive annealing of precursors with specially designed nanostructures.

Потенциальные изображения сегнетоэлектрических доменных структур в кристаллах ниобата лития после формирования электронным лучом

Ferroelectric domain structures formed by an electron beam in lithium niobate crystals are studied using low-voltage SEM microscopy. The structures are formed in crystals with different conductivity, including samples with high-resistance congruent composition (CLN) and samples with conductivity increased by reductive annealing (RLN). The potential nature of the contrast of the domain structures observed in the secondary electron mode depending on the conductivity of the samples and the direction of spontaneous polarization of the domains is analyzed. It is assumed that the domain contrast in CLN crystals is associated with long-lived charges localized near domain walls and in the irradiated areas. The recorded domain structures in the CLN crystals are visualized on polar and nonpolar cuts. In the RLN crystals with improved conductivity compared to CLN, the potential contrast of the periodic domain structures is found only on the polar cuts, where vector P _ s of the domains is perpendicular to the irradiated surface. This contrast is likely because the field of the spontaneous electric polarization charges influences the secondary electrons.