摘要:
To ensure a well-oriented crystal structure, there is provided a process of producing an oxide superconductor of a Y--Ba--Cu--O system with a composition having an atomic ratio Y:Ba:Cu of 1.0-2.0:2.0-2.5:3.0-3.5, the process comprising the steps of: preparing a semimelt including solid and liquid phases and consisting of Y, Ba, Cu and O in the atomic ratio; and solidifying the semimelt to form the oxide superconductor by so controlling a moving speed of a solidification front to have two components of different values in two perpendicularly intersecting directions.
摘要:
A superconducting bearing unit compring a permanent magnet mounted to a rotating shaft and a superconducting body mounted on the inner periphery of a housing surrounding the shaft, the superconducting member being adapted to be cooled with the rotating shaft moved upwards until it attains a superconducting condition, so that the rotating shaft is supported in use in a balanced condition between the weight of the rotating shaft, etc. and a pinning force caused by the permanent magnet and the superconducting member.
摘要:
The present invention relates to a process for preparing an oxide superconductor having a high critical current density, a uniform structure and an excellent mechanical property and thermal stability, which comprises heating raw material powders of a REBaCuO system at 1050.degree. C. or higher, cooling the material for solidification, pulverizing and mixing the solidified material to homogeneously disperse the structure of the solidified material, molding the material, optionally mixed with silver oxide or silver, into a predetermined shape, and reheating the molding to 1050.degree. C. or higher to grow a superconducting phase.
摘要:
A composite material having a plurality of sections integrated into a unitary structure and each including a bulk of a superconductive metal oxide of RE--Ba--Cu--O wherein RE represents a rare earth element, the bulk of each of the sections having pinning centers and capable of trapping a magnetic field. A first one of the sections has a superconductive current density different from that of a second one of the sections. The composite material may be produced by assembling preformed respective sections into a unitary structure or by immersing one of the sections in a solution to grow crystal of Y--Ba--Cu--O superconductive on that section, followed by trimming.
摘要:
The invention includes: multiple bit lines b1 to b5 arranged in parallel to each other at a first line pitch; multiple word lines w1 to w4 arranged in parallel to each other at a second line pitch greater than the first line pitch and intersecting with bit lines b1 to b5; and multiple capacitors. Respective center positions 4 of the multiple capacitors lie above the bit lines and are displaced by given distance C from the intersection of the bit line and the word line in a direction of arranging the word lines.
摘要:
A method of manufacturing a semiconductor device in which the formation of buried wiring is facilitated includes: forming columnar patterns, which are arranged in a two-dimensional array, and bridge patterns, which connect the columnar patterns in a column direction, on a main surface of a silicon substrate; injecting an impurity in a surface portion of each of the columnar patterns and bridge patterns and in surface portions of the silicon substrate, thereby forming impurity injection layers; forming a side wall on sides of the columnar patterns and bridge patterns; removing the impurity injection layer, which has been formed in the silicon substrate, with the exception of the impurity injection layer covered by the bottom portions of the side walls; removing the side walls by etch-back; and thermally oxidizing the surface portion of the bridge patterns and then etching away the same. Buried wiring extending in the column direction of the columnar patterns is formed within the silicon substrate.
摘要:
A positive electrode active material of a nonaqueous electrolyte secondary battery is improved by using an inexpensive lithium transition metal oxide containing nickel and manganese as main components. Output characteristics of the battery under various temperature conditions are thereby improved, and the battery is suitable as a power supply of a hybrid vehicle. The battery includes a positive electrode including a positive electrode active material, a negative electrode including a negative electrode active material, and a nonaqueous electrolyte prepared by dissolving a solute in a nonaqueous solvent. The positive electrode active material includes positive electrode active material particles composed of a lithium transition metal complex oxide having a layered structure containing nickel and manganese as main components, and at least one niobium-containing material selected from a Li—Nb—O compound and a Li—Ni—Nb—O compound, the at least one niobium-containing material being sintered onto surfaces of the positive electrode active material particles.
摘要:
A sacrifice oxide film is formed in a Fin semiconductor substrate portion, and impurities are then implanted in the semiconductor substrate through a mask pattern as a mask. Thereafter, the sacrifice oxide film is removed to expose the semiconductor substrate. A gate insulating film is then formed on the exposed semiconductor substrate.
摘要:
Disclosed is a composite negative electrode active material including a graphitizable carbon material containing a layered structure formed of stacked carbon layers partially having a three-dimensional regularity, and a low crystalline carbon material. A negative electrode including the composite negative electrode active material is used to produce a non-aqueous electrolyte secondary battery. The non-aqueous electrolyte secondary battery thus produced has a high energy density and demonstrates a high output/input performance for a long period of time in various environments of high to low temperatures.
摘要:
The invention includes: multiple bit lines b1 to b5 arranged in parallel to each other at a first line pitch; multiple word lines w1 to w4 arranged in parallel to each other at a second line pitch greater than the first line pitch and intersecting with bit lines b1 to b5; and multiple capacitors. Respective center positions 4 of the multiple capacitors lie above the bit lines and are displaced by given distance C from the intersection of the bit line and the word line in a direction of arranging the word lines.