Abstract: Disclosed is carbonaceous material for a negative electrode of a lithium secondary battery which reduces an irreversible capacity and increases a discharge capacity of the battery. A surface of carbon particles of the negative electrode is coated with a porous nickel thin film, wherein the nickel film comprises 0.05% by weight to 1.0% by weight of the carbonaceous material.

Abstract: Disclosed is carbonaceous material for a negative electrode of a lithium secondary battery and a lithium secondary battery made using the carbonaceous material. The carbonaceous material includes a silica film coated on a surface of carbon particles of the carbonaceous material, thereby minimizing both direct contact of the carbon particles with an organic electrolyte and cointercalation of the organic electrolyte and lithium ions within a structure of the carbon. The lithium secondary battery includes a negative electrode deposited with the carbonaceous material, a counterpart electrode made of lithium metal, electrolyte made of a propylene carbonate/ethylene carbonate solution containing 1 mol/l of LiPF8, and a polypropylene separator.

Abstract: A fibrous anisotropic permanent magnet is disclosed comprising fibers composed of an alloy comprising at least one of a rare earth metal selected from Nd, Pr, Dy, Ho, Tb, La, and Ce; Fe or Fe and Co; and B, said fibers having a mean diameter of from 50 to 1,000 .mu.m and exhibiting magnetic anisotropy. The fibrous anisotropy permanent magnet is prepared by extruding a molten alloy comprising at least one of Nd, Pr, Dy, Ho, Tb, La, and Ce; Fe or Fe and Co; and B in an oil to quench-solidify the molten alloy into a fibrous form.Since the fibrous magnet exhibits excellent anisotropic magnetic characteristics in the lengthwise direction of the fiber axis in the quench-solidified state, the magnet is particularly useful as a magnetic powder material for an anisotropic bond magnet.

Abstract: A fibrous anisotropic permanent magnet is disclosed comprising fibers composed of an alloy comprising at least one of a rare earth metal selected from Nd, Pr, Dy, Ho, Tb, La, and Ce; Fe or Fe and Co; and B, said fibers having a mean diameter of from 50 to 1,000 .mu.m and exhibiting magnetic anisotropy. The fibrous anisotropy permanent magnet is prepared by extruding a molten alloy comprising at least one of Nd, Pr, Dy, Ho, Tb, La, and Ce; Fe or Fe and Co; and B in an oil to quench-solidify the molten alloy into a fibrous form.Since the fibrous magnet exhibits excellent anisotropic magnetic characteristics in the lengthwise direction of the fiber axis in the quench-solidified state, the magnet is particularly useful as a magnetic powder material for an anisotropic bond magnet.

Abstract: Superplastic aluminum alloy strips comprising 1.5 to 90% of magnesium, 0.5 to 5.0% of silicon, 0.05 to 1.2% of manganese, 0.05 to 0.3% of chromium and the balance consisting essentially of aluminum, and also a process for producing superplastic aluminum alloy strips comprising continuously casting and rolling a molten aluminum alloy containing 1.5 to 9.0% of magnesium, 0.5 to 5.0% of silicon, 0.05 to 1.2% of manganese and 0.05 to 0.3% of chromium, thereby obtaining a cast strip of 3 to 20 mm in thickness, homogenizing the cast strip at a temperature of 430.degree. to 550.degree. C., and subjecting the homogenized strip to cold rolling until the reduction ratio reaches up to a value of not less than 60%.

Abstract: Process for producing superplastic aluminum alloy strips comprising continuously casting and rolling a molten aluminum alloy containing 4.0 to 6.0% (by weight) of magnesium, 0.4 to 1.5% (by weight) of manganese, 0.05 to 0.2% (by weight) of chromium and less than 0.50% (by weight) of silicon, thereby preparing a cast strip of 3 to 20 mm in thickness, after subjecting the cast strip to annealing treatment at a temperature of 420.degree. to 530.degree. C., subjecting the annealed strip to the former step of cold rolling and intermediate annealing and then subjecting the intermediately annealed strip to the latter step of cold rolling until the reduction ratio reaches to a value of not less than 60%.