The lattice constants of Sm-Co permanent magnet alloy have been determined by means of X-ray diffraction measurement. The lattice constants of R-Co alloy systems (R = rare earth) have been investigated with Bragg-will...The lattice constants of Sm-Co permanent magnet alloy have been determined by means of X-ray diffraction measurement. The lattice constants of R-Co alloy systems (R = rare earth) have been investigated with Bragg-williams (B-W) approximation and their expressions are given. It is pointed out that the lattice constants of RCo5 phase depend only on the alloy composition, and that the lattice constants of R2Co17 phase are related to the order parameter as well as the alloy composition. In this paper the relationship between the lattice constants of RCo5 and those of R2Co17 is discussed, and the values calculated by the expressions are compared with experimentally determined for Sm-Co alloys.展开更多
In the presence of metallic samariumcobalt (II) chloride hexahydrate, the nitrones can be reduced to the corresponding imines in moderate to high yields under mild and neutral conditions.
Samarium–cobalt rare-earth（Sm–Co-RE） permanent magnetic materials with large magnetic energy product, high coercive force, high Curie temperature, good thermal stability, and corrosion resistance, have wide potent...Samarium–cobalt rare-earth（Sm–Co-RE） permanent magnetic materials with large magnetic energy product, high coercive force, high Curie temperature, good thermal stability, and corrosion resistance, have wide potential applications in aerospace, microwave communications, instrumentation, electrical engineering, magnetic machinery, etc. In this paper, the development of Sm–CoRE permanent magnetic materials in the following aspects in recent years was summarized： Sm–Co-RE permanent magnets with high application temperatures, positive temperature coefficients of coercive force, zero temperature coefficients of residual magnetization, high resistance rate,high mechanical property, and nanocrystallization.展开更多
文摘The lattice constants of Sm-Co permanent magnet alloy have been determined by means of X-ray diffraction measurement. The lattice constants of R-Co alloy systems (R = rare earth) have been investigated with Bragg-williams (B-W) approximation and their expressions are given. It is pointed out that the lattice constants of RCo5 phase depend only on the alloy composition, and that the lattice constants of R2Co17 phase are related to the order parameter as well as the alloy composition. In this paper the relationship between the lattice constants of RCo5 and those of R2Co17 is discussed, and the values calculated by the expressions are compared with experimentally determined for Sm-Co alloys.
文摘In the presence of metallic samariumcobalt (II) chloride hexahydrate, the nitrones can be reduced to the corresponding imines in moderate to high yields under mild and neutral conditions.
基金financially supported by the Research Fund for the Doctoral Program of Higher Education of China (No.20100560)the National Natural Science Foundation of China (Nos. 51104188 and 51274107)
文摘Samarium–cobalt rare-earth（Sm–Co-RE） permanent magnetic materials with large magnetic energy product, high coercive force, high Curie temperature, good thermal stability, and corrosion resistance, have wide potential applications in aerospace, microwave communications, instrumentation, electrical engineering, magnetic machinery, etc. In this paper, the development of Sm–CoRE permanent magnetic materials in the following aspects in recent years was summarized： Sm–Co-RE permanent magnets with high application temperatures, positive temperature coefficients of coercive force, zero temperature coefficients of residual magnetization, high resistance rate,high mechanical property, and nanocrystallization.
