氧化钐纳米片的热导率

… Thin nanosheets and flowerlike spheres consisted of nanosheets began to appear at 180 C. These results reflect the crystal growth habit difference between Sm 2 O 3 amd Dy 2 O 3 …

… to design the thermal decomposition route for synthesis of uniform samarium oxide (Sm2O3) … shows that the edges of the square-shape nanoplate are surrounded by (100) planes (Fig. 1…

Programming the reaction chemistry for superseding the formation of Sm2O3 in a competitive process of formation and dissolution, the crystal growth patterns are varied and two different nanostructures of Sm2O3 in 2D confinement regime are designed. Among these, the regular and self-assembled square platelets nanostructures exhibit paramagnetic behavior analogous to the bulk Sm2O3. But, the other one, 2D flower like shaped nanostructure, formed by irregular crystal growth, shows superparamagnetism at room temperature which is unusual for bulk paramagnet. It has been noted that the variation in the crystal growth pattern is due to the difference in the binding ability of two organic ligands, oleylamine and oleic acid, used for the synthesis and the magnetic behavior of the nanostructures is related to the defects incorporated during the crystal growth. Herein, we inspect the formation chemistry and plausible origin of contrasting magnetism of these nanostructures of Sm2O3.

… and refractory materials having exceptional thermal stability and unique physicochemical properties [12, 13]. However, the magnetic, optical, and electronic properties can be judiciously …

… Because new morphology generally exhibits different physicochemical properties and … thermal dehydration effect. The color of the sample was white and unchanged after thermal …

To increase operating temperature and improve performance of gas-turbine engines, it is urgently needed to develop new thermal barrier oxides with a lower thermal conductivity than 6…

We have synthesized Sm 2 O 3 nanoparticles (SmNs) and anchored them onto the surface of reduced graphene oxide (RGO) through a self-assembly thereof by utilizing a facile …

Effect of Sm2O3 on microstructure, thermal shock resistance and thermal conductivity of cordierite-mullite-corundum composite ceramics for solar heat transmission pipeline - …

… but also improved thermal conductivity by decreasing oxygen impurity. Thermal conductivity decreased with increasing amount of Sm 2 O 3 and the highest thermal conductivity was …

In this article, the current conduction and resistive switching (RS) behavior in flexible Sm2O3 and Lu2O3 resistive random access memories (ReRAM) are investigated. Amorphous Sm2O3 and Lu2O3 thin films were deposited at room temperature by radio-frequency magnetron sputtering on flexible polyethylene terephthalate substrate. The structural morphologies of the Sm2O3 and Lu2O3 thin films strongly depend on the lattice energy of the oxides. The dominant current conduction mechanism in the oxide layer changes from electrode control Schottky emission in Sm2O3 to bulk controlled space-charge-limited-current in Lu2O3. The barrier height extracted from Schottky emission model is 0.96 eV in Sm2O3 thin film, while the activation energy of traps calculated from the Arrhenius plots is about 0.23 eV in Lu2O3 thin film. Additionally, the Ni/Sm2O3/ITO flexible memory device shows promising RS behavior with very low power of operation (∼30 μW) and small distribution of switching parameters. The memory reliability characteristics of switching endurance, data retention, good flexibility, and mechanical endurance show promising for future memory applications. The filament conduction model is adopted to describe the RS behavior in the Sm2O3 and Lu2O3 ReRAM devices. The improved RS performance in Sm2O3 thin film is attributed to the different physical properties of the thin films.

… of the films were 18.8 and . The electrical properties were measured using thin samples . … of the most often observed conduction mechanisms in dielectric films, especially at relatively …

Samarium oxide (SMO), a rare-earth oxide, has gathered great interest from researchers because of its variable valences and promising ionic conductivity. Herein, SMOs with cubic and monoclinic phases were synthesized. The changes in the crystal structure of SMOs with sintering temperature were analyzed. The cell based on cubic phase SMO achieves an excellent maximum power density of 0.876 W cm−2 along with a high ionic conductivity at 550 °C, indicating an enhanced ionic conductivity compared with monoclinic phase SMO. Further analysis of x-ray diffraction and x-ray photoelectron spectra results confirmed that there were more oxygen vacancies formed in cubic phase SMO than monoclinic phase SMO, thereby offering more active sites for fast ion transport. Furthermore, both cubic phase and monoclinic phase SMOs are dominated by proton conduction, while cubic phase SMO is further coupled with oxygen ion conduction, which leads to higher ionic conductivity of cubic phase SMO. In this study, the ionic conductivities of SMOs with different crystal structures are compared and reasons for the differences are disclosed, which provides guidance for further applications of SMO.

… to affect the mechanical properties, thermal properties, and electrical properties of AlN. … oxide and calcium carbonate are added as sintering aids. In addition, 0–5 wt% of samarium oxide …

Abstract Linear attenuation coefficient, density and thermal expansion of samarium sesquioxide (Sm2O3) as a function temperature has been studied by gamma ray attenuation technique in the temperature range 300–1000 K. The studies have been carried out using the gamma ray densitometer fitted with a programmable high temperature furnace. The mass attenuation coefficient of samarium sesquioxide has been determined using gamma beam of energy 0.662 MeV. The value of mass attenuation coefficient has been used to calculate the density (ρ), linear attenuation coefficient (µl) and thermal expansion (α). The results obtained in the present work for thermal expansion have been compared with results obtained from the other methods. The agreement between the present values and the values obtained from the X-ray method is good in the case of linear thermal expansion. The variation in linear attenuation coefficient (µl), density (ρ) and linear thermal expansion (α) with temperature for Sm2O3 have been represented by second degree polynomial equations.