Yttrium barium copper oxide

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Yttrium barium copper oxide, often abbreviated YBCO, is a crystalline chemical compound with the formula YBa2Cu3O7. (Wikipedia.org)






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2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)

Science, technology and applications spanning the millimeter-waves, terahertz and infrared spectral regions


2018 53rd International Universities Power Engineering Conference (UPEC)

UPEC is a long-established international conference which provides a major forum for scientists, young researchers, PhD students and engineers worldwide to present, review and discuss the latest developments in Electrical Power Engineering and relevant technologies including energy storage and renewables

  • 2016 51st International Universities Power Engineering Conference (UPEC)

    UPEC is a long-established conference, which is very popular with young researchers, PhD students and engineers from the electrical power industry. The aim of the conference is to allow participants to exchange experiences and discuss the most up-to-date topics in Power Engineering. The global energy challenge, the ageing of electrical networks in industrial countries, and the extension of the grid systems in developing countries require significant research input in the area. UPEC is an ideal forum to address some of these issues, and to network and meet with talented engineers and innovators in these areas.

  • 2015 50th International Universities Power Engineering Conference (UPEC)

    The conference provides a major international focus for the presentation, discussion and exchange of information concerning new trends in Electrical Power Engineering. The conference is very popular with young researchers, PhD students and engineers from the electrical power industry. Given the major challenges now facing the electrical power industry, and the energy sector in general, this conference provides an ideal opportunity to address some of these challenges.

  • 2014 49th International Universities Power Engineering Conference (UPEC)

    Given the major challenges now facing the electrical power industry, and the energy sector in general, this conference provides an ideal opportunity to address some of these challenges. It also provides the opportunity to network and to meet the experts in these areas.

  • 2013 48th Universities' Power Engineering Conference (UPEC)

    The conference provides a major international focus for the presentation, discussion and exchange of information concerning new trends in Electrical Power Engineering. The conference is very popular with young researchers, PhD students and engineers from the electrical power industry. Given the major challenges now facing the electrical power industry, and the energy sector in general, this conference provides an ideal opportunity to address some of these challenges.

  • 2012 47th International Universities Power Engineering Conference (UPEC)

    A major international forum for the presentation, discussion and exchange of information concerning new trends in electrical power engineering. To become better informed about the latest developments in the field of power engineering.

  • 2010 45th International Universities Power Engineering Conference (UPEC)

    The global energy challenge, the ageing of electrical networks in industrial countries, and the extension of the grids in developing countries require significant research effort and the need for talented engineers and innovators is critical to the electrical energy industry. UPEC is an ideal forum to address such issues, and to network and meet experts in these areas

  • 2009 44th International Universities Power Engineering Conference (UPEC)

    UPEC has been long-established as a major annual international forum for the presentation, discussion and exchange of information concerning new trends in all areas of electric power engineering. Contributions from younger engineers and researchers are particularly encouraged at UPEC, where ideas can be aired freely and new relationships developed.

  • 2008 43rd International Universities Power Engineering Conference (UPEC)

    Its aim will be to provide a professional forum for engineers and research scientists from the universities, consultants, and in the manufacturing and supply industries opportunities to present their work and explore potential trends and recent developments, current practices in Power Engineering and related fields.

  • 2007 Universities Power Engineering Conference (UPEC)

  • 2006 International Universities Power Engineering Conference (UPEC)

  • 2004 International Universities Power Engineering Conference (UPEC)


2017 4th International Conference on Electric Power Equipment - Switching Technology (ICEPE-ST)

The International Conference on Electric Power Equipment-Switching Technology is to encourage the innovation in the field of science and application of electric power equipment especially switching technology. The topics of the conference will be:Switching phenomena in ultra-high voltage systemsEmerging high voltage switching technologies (such as high voltage vacuum switching technologies, SF6 alternatives, DC circuit breakers, etc.)Apparatus for power flow control in smart distribution gridsFault current limiting technology Semi-conductor switching technologyDigital design technologies (CAE) in switchgearsFundamental physics in switchgear.


2016 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS)

The IEEE APCCAS 2016, the 13th of the biennial Asia Pacific Conference on Circuits and Systems, will be held in Korea at the RAMADA PLAZA JEJU Hotel, Jeju Island. Jeju Island is the biggest island and a most popular tourist resort in Korea. With its natural beauty and unique island culture, Jeju offers cutting-edge convention facilities, sufficient infrastructure, and gifted eco-friendly environment. The APCCAS is a major international forum established by the IEEE Circuits and Systems Society for researchers to exchange their latest findings in circuits and systems


2012 IEEE MTT-S International Microwave Workshop Series on Innovative Wireless Power Transmission: Technologies, Systems, and Applications (IMWS 2012)

Topic Areas are Wireless Power Transmission Theory, Technologies and Applications which includes: 1) Microwave Power Transmission 2) Resonant Coupling Wireless Power Transmission 3) Inductive Coupling Wireless Power Transmission 4) Energy Harvesting


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Periodicals related to Yttrium barium copper oxide

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Applied Superconductivity, IEEE Transactions on

Contains articles on the applications and other relevant technology. Electronic applications include analog and digital circuits employing thin films and active devices such as Josephson junctions. Power applications include magnet design as well asmotors, generators, and power transmission


Components and Packaging Technologies, IEEE Transactions on

Component parts, hybrid microelectronics, materials, packaging techniques, and manufacturing technology.


Electron Devices, IEEE Transactions on

Publishes original and significant contributions relating to the theory, design, performance and reliability of electron devices, including optoelectronics devices, nanoscale devices, solid-state devices, integrated electronic devices, energy sources, power devices, displays, sensors, electro-mechanical devices, quantum devices and electron tubes.


Instrumentation and Measurement, IEEE Transactions on

Measurements and instrumentation utilizing electrical and electronic techniques.


Magnetics, IEEE Transactions on

Science and technology related to the basic physics and engineering of magnetism, magnetic materials, applied magnetics, magnetic devices, and magnetic data storage. The Transactions publishes scholarly articles of archival value as well as tutorial expositions and critical reviews of classical subjects and topics of current interest.


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Most published Xplore authors for Yttrium barium copper oxide

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Xplore Articles related to Yttrium barium copper oxide

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Superconducting Antennas

Small Antenna Handbook, None

This chapter contains sections titled: * Introduction * Superconductivity Concepts for Antenna Engineers * Dipole, Loop, and Patch Antennas * Phasers and Delay Lines * Superconducting Antenna Summary * References


Critical Issues In The Synthesis And Processing Of High Temperature Superconductor Materials

Electro International, 1991, 1991

None


Quasiparticle dynamics in YBCO and YBCO/LSMO measured using femtosecond optical spectroscopy

2012 Conference on Lasers and Electro-Optics (CLEO), 2012

Terahertz time-domain spectroscopy and temperature dependent femtosecond optical pump-probe spectroscopy are used to track quasiparticle dynamics at the interface between superconducting and ferromagnetic oxide layers.


A superconducting RF resonator in HF range and its multi-pole filter applications

IEEE Transactions on Applied Superconductivity, 1999

We report a new RF resonator that operates at high frequency (HF, 3-30 MHz) of electromagnetic spectrum. The resonator is fabricated on a double-sided HTS (YBCO) thin film on a single 2" LAO substrate. The resonator is of smaller size and has a higher Q-value than conventional copper resonators. At temperatures below 77 K the Q-value of the resonator is ...


Optically triggered switching of optically thick YBCO films

IEEE Transactions on Applied Superconductivity, 1993

Thin films of high-T/sub c/ superconducting material were used to construct two different types of opening switches: the photoresistive switch and the inductively coupled switch. The former show two distinct switching components in 8000-AA films consisting of a slow bolometric response and a faster nonbolometric response. The fast nonbolometric component had risetimes of approximately 4 ns and falltimes of approximately ...


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Educational Resources on Yttrium barium copper oxide

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IEEE-USA E-Books

  • Superconducting Antennas

    This chapter contains sections titled: * Introduction * Superconductivity Concepts for Antenna Engineers * Dipole, Loop, and Patch Antennas * Phasers and Delay Lines * Superconducting Antenna Summary * References

  • Critical Issues In The Synthesis And Processing Of High Temperature Superconductor Materials

    None

  • Quasiparticle dynamics in YBCO and YBCO/LSMO measured using femtosecond optical spectroscopy

    Terahertz time-domain spectroscopy and temperature dependent femtosecond optical pump-probe spectroscopy are used to track quasiparticle dynamics at the interface between superconducting and ferromagnetic oxide layers.

  • A superconducting RF resonator in HF range and its multi-pole filter applications

    We report a new RF resonator that operates at high frequency (HF, 3-30 MHz) of electromagnetic spectrum. The resonator is fabricated on a double-sided HTS (YBCO) thin film on a single 2" LAO substrate. The resonator is of smaller size and has a higher Q-value than conventional copper resonators. At temperatures below 77 K the Q-value of the resonator is above 40,000. A 3-pole filter is made by using 3 of this resonator which demonstrates a low insertion loss. This report will discuss the design, fabrication, RF characteristics (return and insertion loss), and the Q-value of the devices in detail. The simulated model of the RF characteristics of the devices will also be given.

  • Optically triggered switching of optically thick YBCO films

    Thin films of high-T/sub c/ superconducting material were used to construct two different types of opening switches: the photoresistive switch and the inductively coupled switch. The former show two distinct switching components in 8000-AA films consisting of a slow bolometric response and a faster nonbolometric response. The fast nonbolometric component had risetimes of approximately 4 ns and falltimes of approximately 6 ns. The slower component was identified to be thermal in origin and was in good agreement with the one- dimensional heat flow model used to simulate the thermal photoresponse. The inductively coupled switch is a contactless switch where the superconducting film screens the flux coupling between two coils of a transformer. The optically induced switching was achieved with risetimes of approximately 50 ns. with a multiturn output coil. Short (150-ps) laser pulses containing energies of up to 3 mJ are used in both cases to perform the switching.<<ETX>>

  • Thin film Y-Ba-Cu-O/Ag composites for fluxonic devices

    We have investigated thin film composites of YBa/sub 2/Cu/sub 3/O/sub 7/ (YBCO) with Ag for fluxonic device applications. YBCO/Ag composite films are produced by first depositing a layer of Ag onto a substrate and then heating the film to the YBCO deposition temperature of 680/spl deg/C or higher. YBCO is deposited by off-axis sputtering onto the Ag-coated substrate. The resulting YBCO/Ag film is a composite of YBCO with well-defined Ag regions several microns in size. Scanning electron micrograph images of the films' surfaces show a background of smooth YBCO grains dotted with Ag clusters. For a wide range of increasing Ag composition, the transition temperatures of the composite films on SrTiO/sub 3/ remain high, while the critical current densities have been reduced as much as 65 times. On MgO substrates, critical current density has been reduced by more than four orders of magnitude. Also on MgO, significant voltage response is seen in external magnetic fields of less than 1 mT. These measurements suggest that the films may be arrays of superconductor-normal-superconductor (SNS) junctions formed by weakly coupled YBCO grains with Ag in the grain boundaries. The field responsivity and low critical current densities of these composites make them potentially useful for fabrication of fluxonic devices.

  • Large area pulsed laser deposition of YBCO thin films

    A special PLD-setup for large area deposition of homogeneous YBa/sub 2/Cu/sub 3/O/sub 7-x/ (YBCO) thin films and buffer layers as large as 7 cm/spl times/20 cm is presented. A new concept for homogeneous large area substrate heating and the influence of the deposition rate on the film properties is discussed. YBCO is deposited on r-plane sapphire substrates (10 cm/spl times/10 cm) as well as on smaller (2 inch O, 1 cm/spl times/1 cm) SrTiO/sub 3/, MgO, LaAlO/sub 3/, and on yttria stabilized ZrO/sub 2/ substrates distributed over the deposition area. The homogeneity of the deposited YBCO films concerning structural and electrical properties is investigated by XRD, RBS/channeling, and spatially resolved inductive measurements of T/sub c/ and J/sub c/. The variation of J/sub c/ on a 2 inch MgO wafer is less than /spl plusmn/9%, the mean c-axis length is 11.681 /spl Aring/, the FWHMs of the [005] rocking curves are 0.40 and the channeling minimum yield /spl chi//sub min/ varies between 3.7% and 4.9% over the 2 inch wafer. The J/sub c/ values of YBCO on 7 cm x 20 cm in situ buffered sapphire substrates are (2.0/spl plusmn/0.4 MA/cm/sup 2/) at T=77 K and B=0 T.

  • Microstructure and Superconducting Behavior of<formula formulatype="inline"><tex>${\hbox{YBa}}_{2}{\hbox{Cu}}_{3}{\hbox{O}}_{7-\delta}$</tex></formula>Films Fabricated From Colloids of Nanoparticles

    A new approach in the synthesis of YBa2CuO7-delta(YBCO) films has been demonstrated, which uses a colloidal dispersion of nanoparticles of Y-Ba-Cu-O as precursor. Since nanoscale particles tend to be very reactive, this precursor allows rapid processing. Moreover, since the starting composition is very similar to the final film, gaseous reaction products that cause porosity and toxicity in other methods can be minimized. This paper compares the microstructure and superconducting behavior of Alms prepared from nanoparticle suspensions to those fabricated by metal-organic deposition technique using trifluoroacetates. It is seen that these films show significantly reduced porosity and some enhancement in self-field critical current density (Jc). The enhancement of Jcis more significant in high magnetic fields, probably due to the nanoscale precipitates spontaneously formed. It also appears that there is scope of improving this further by adding small amounts of CeO2nanoparticles in the precursor. However adding larger amounts may have a detrimental effect. Additional investigation on the role of nano-inclusions in flux pinning will be needed, but this work clearly shows that the use of nanoparticle colloids for making YBCO films is a very promising approach that will be scalable, non- toxic, and allow easy introduction of flux-pinning defects.

  • Studies of YBCO strip lines under voltage pulses: optimization of the design of fault current limiters

    We present experimental results on the behavior of a superconducting YBCO/Au meander of length L submitted to short circuit tests with constant voltage pulses. The meander, at the beginning of the short-circuit, is divided in two regions; one, with a length L/sub 1/ proportional to the applied voltage, which first switches into a highly dissipative state (HDS) while the rest remains superconducting. Then the rest of the meander will progressively switch into the normal state due to the propagation of this HDS (few m/s) from both ends. The part L/sub 1/ has to initially support a power density proportional to /spl rho//spl middot/J/sub p//sup 2/ (/spl rho/ is the resistivity of the bilayer and J/sub p/ the peak current density). To avoid local excessive dissipation of power and over heating on one part of the wafer in the initial period, we have developed a novel design in order to distribute the dissipating section of the meander into many separated small dissipative zones. Furthermore the apparent propagation velocity of these dissipative zones is increased by the number of propagation fronts. We will show results obtained on 3 kW (300 V, 10 A) FCL on a 2" wafer which confirm the benefits of this new design.

  • Test of a Modular Fault Current Limiter for 220 V Line Using YBCO Coated Conductor Tapes With Shunt Protection

    A modular superconducting fault current limiter (SFCL) consisting of 16 elements was constructed and tested in a 220 V line for a fault current between 1 kA to 7.4 kA. The elements are made up of second generation (2G) YBCO-coated conductor tapes with stainless steel reinforcement. For each element four tapes were electrically connected in parallel with effective length of 0.4 m per element, totaling 16 elements connected in series. The evaluation of SFCL performance was carried out under DC and AC tests. The DC test was performed through pulsed current tests and its recovery characteristics under load current were analysed by changing the shunt resistor value. The AC test performed using a 3 MVA/220 V/60 Hz transformer has shown the current limiting ratio achieved a factor higher than 10 during fault of up to five cycles without conductor degradation. The measurement of the voltage for each element during the AC test showed that in this modular SFCL the quench is homogeneous and the transition occurs similarly in all the elements.



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