206 results about "Yttrium barium copper oxide" patented technology

A renewable electric power system includes a high temperature superconducting wind turbine using high temperature superconducting yttrium-barium-copper oxide for the rotor and stator windings as well as a superconducting bearing. Power from the turbine is stored in a high temperature superconducting magnetic storage system that also uses HTS YBCO. Also included is a regenerative solid oxide fuel cell / electrolyzer with steam turbine cogeneration. The system operates on a managed day / night cycle. During daytime, the energy produced by the wind turbines and fuel cells is transmitted to the grid. During nocturnal hours, the wind turbine is used to provide low cost electricity to the reversible fuel cells operating in the electrolysis mode producing hydrogen and oxygen that is stored for later use. Alternatively, the fuel cells can remain in electrolysis mode producing hydrogen and oxygen for the market. A modified interactive system generates power on a continuous twenty-four hour cycle.

A method and structure for forming a capacitor in a semiconductor device using a high dielectric constant, yttrium barium copper oxide layer as the capacitor dielectric layer. The process begins by providing a semiconductor structure having a conductive plug therein and having an opening, with sidewalls, over the conductive plug. The opening is shaped to accomodate a capacitor structure as is known in the art. A first conductive layer is formed on the conductive plug and on the sidewalls of the opening. A yttrium barium copper oxide layer is deposited on the first conductive layer using a sputtering process with a YBa2Cu3O7 target. The yttrium barium copper oxide layer can be annealed to control the oxygen content. For example, YBa2Cu3O6+X can be controlled at between X=0.2 and X=0.5. A second conductive layer is formed on the yttrium barium copper oxide layer, thereby forming a capacitor comprising the first conductive layer, the yttrium barium copper oxide layer, and the second conductive layer.

The present invention relates to an apparatus and method for forming a high-temperature superconducting film on a long tape substrate at speeds suitable for large-scale production. The method includes a spooling system for use in a high-throughput, continuous pulsed laser deposition (PLD) process in which a superconducting layer, such as yttrium-barium-copper-oxide (YBCO), is deposited atop a buffered metal substrate tape that is translated through one or more deposition chambers via the action of a reel-to-reel spooling system and a conductive-radiant multi-zone substrate heater. It also optionally includes a multi-target manipulator apparatus and multiple laser beams in which multiple targets are impinged upon simultaneously.

The invention relates to a method for improving a critical current for continuously preparing a YBCO (Yttrium Barium Copper Oxide) strip, which comprises the following steps of: (1) in a vacuum chamber of equipment for continuously preparing a YBCO superconducting layer, fixing a metal substrate on a guide belt; (2) using YBCO as a target material, wherein the target-substrate distance is in the range of 40 to 60mm; (3) regulating a laser optical path before vacuumizing; (4) when the vacuum degree in the vacuum chamber is superior to 3*10<-4>Pa, heating the metal substrate to the temperature of 750 to 770 DEG C and controlling the pure oxygen atmosphere into 20 to 30Pa; (5) depositing a first layer of YBCO thin film under the laser frequency of 10 to 20Hz and at the traveling speed of 0.1 to 0.4mm / s, then depositing a plurality of layers of YBCO thin films, and when depositing the next layer of YBCO thin film every time, respectively rising the temperature of the metal substrate in the process of depositing the previous layer of YBCO thin film by 10 to 20 DEG C and depositing the next layer of YBCO thin film under the laser frequency of 10 to 40 Hz and at the traveling speed of 0.1 to 0.2mm / s; and (6) carrying out in-situ annealing to prepare the YBCO superconducting layer. According to the invention, the layered deposition is adopted, the temperature is properly risen between the layers, the problem of variation of a cube texture of the YBCO layer along with the increase of the thickness is solved, and the superconducting performance is effectively improved.