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 Wysłany: Czw 12:56, 18 Lis 2010 Temat postu: ugg botas BPMPDD of hydrochloric acid scandium, ir |
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BPMPDD of hydrochloric acid scandium, iron, and Scandium extraction of tin, iron, solid-state ...
, Sh, 6H) (t, 4H) (m. 12H) (0-br, 2H) 7.2O, 7.802.422.711.34 '1 .5 Oo. 95I (m,[link widoczny dla zalogowanych], 20H) (j,[link widoczny dla zalogowanych], 0h, 12H) (t,[link widoczny dla zalogowanych], BH) (m,[link widoczny dla zalogowanych], 24H) (5-lil) I is a C-H peak, the peak of the emergence of HA 'the keto form with I-bit evidence. For Fe \chloroform, slightly soluble in dimethylformamide. insoluble in acetone, DMSO, water, ethanol, petroleum ether and acetonitrile. 298K guillotine was l and l chloroform solution (1x10mol / 1) of the conductance were 1ms ・ m / tool and 0.6ms ・ m. / too1. from the literature (7) shows that a non-electrolyte solution in chloroform together, these results push SeA ・ HA (FeA-HA's structure is similar to SeA ・ HA ) and the possible structure shown in Figure 3. circle 3SeA ・ HA and the possible structure ● ● ● '● 1991 on l2 No. 1 Rare Earth Giant Magnetostrictive Material Development Jiang Zhihong Liu Xianglin Kim Sui more (Shanghai Metallurgical Research The Shanghai) Box-wing vehicle article briefly reviews the development of giant magnetostrictive materials and the status quo, focusing on comments TTe: fenol - D ~ \Some issues still need attention. shut ■ skull giant magnetostrictive rare earth rare earth giant magnetostrictive material is the second light-emitting,[link widoczny dla zalogowanych], rare earth magneto-optical, rare earth permanent magnet, rare earth after the high-temperature superconducting materials such widespread attention and a new type of rare earth functional materials. It has a large magnetostriction value, machinery, fast response, high power density, and can be thrown on the wide range of sonar systems, high-power ultrasonic devices, sophisticated control systems, valves, drives, etc., is a kind of broad prospects for the development of functional materials. From the first discovery in 1972, Clark and other binary RFc2 polycrystalline Taijin (Rl rare earth elements Tb, Dy, etc.) with a large magnetostriction value to today has been able to grow single crystals or grain orientation of the holding materials, materials production has been commercialized. U.S. EdgeTechnologies has introduced products for the Tcrfeno1 a D grade single crystal holding material. Many companies around the world, such as the Swedish company ABB, Volvo, Toshiba and other companies working on the development and application materials expected future market will reach hundreds of millions of dollars of material / year, the prospects are bright. This article will briefly review of foreign literature references ultra-magnetic C1) Yan ocher things, thin ± .1989. <6】 .9. C2 】 DONG Xue Dian Niu, Chemistry .1983,41 (9), 84B.C3), Lanzhou University guilty of war screen vend ± post-leek, science can report .1977,2: (4-5), 2l0. 【●) RO , A.et1 .. Bul1.ChCm.Sac.Ja at n., l ● period, 51,1 S25. telescopic material progress of the last decade, rare-earth functional materials for China to provide some reference. l magnetostrictive object magnetization in the magnetic field when the direction of magnetization occurs in the elongation or shortening, of a phenomenon called magnetostriction. magnetostrictive generation is due to ferromagnetic or ferrimagnetic materials, the following occurred at the Curie point the spontaneous magnetization, the formation of large magnetic domain. In each domain, the lattice is deformed, the spontaneous magnetization direction is a deformation of the spindle. without adding an external magnetic field, the magnetization direction of the magnetic domains are randomly oriented, does not display the macro effect. external magnetic field in. a large number of magnetic domain of magnetic field direction of turn, if you pace back and forth direction of the spontaneous magnetization axis deformation, the material will stretch outside the field direction, which is positive magnetostriction (see Figure 1) l the case of short axis, then the material the direction of external fields will be reduced, which is a negative magnetostriction. magnetostrictive size to the relative expansion = al / 1 to represent, called magnetostriction coefficient, or referred to as magnetostriction. In the crystal, the magnetostriction is generally fan to the opposite sex (5) NakamotoK.eta1., J.Am.Chum.Soc .. 19O, 92Cl3) .39. (6) Hutch | nzonB.eta1., SVcctroch / m.Act =, 19743OC), 1605. ( 7) G ● -tyW.J. ・ Cootd.Che dish. Rev ..] 971.7.81. (z99o ~ 9 月 ■ ● H Gan Fu-income ●)
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