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in subjects: "Yttrium Oxides"  
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High-temperature electrically conductive ceramic and method for making same

Description: It is the primary objective or aim of the present invention to provide an electrically conductive composition for the fabrication of susceptors useful for induction melting of uranium and uranium alloys and to also provide such a composition for forming crucibles and other containment vessels utilized to contain uranium at elevated temperatures. This composition does not appear to interact with molten uranium, since there is no significant reaction between the compositional consituents of the s… more
Date: June 19, 1981
Creator: Holcombe, C.E. Jr. & Masters, D.R.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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Measurements on Subscale Y-Ba-Cu-O Racetrack Coils at 77 K and Self-Field

Description: YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} (YBCO) tapes carry significant amount of current at fields beyond the limit of Nb-based conductors. This makes the YBCO tapes a possible conductor candidate for insert magnets to increase the bore field of Nb{sub 3}Sn high-field dipoles. As an initial step of the YBCO insert technology development, two subscale racetrack coils were wound using Kapton-insulated commercial YBCO tapes. Both coils had two layers; one had 3 turns in each layer and the other 10 tur… more
Date: October 19, 2009
Creator: Wang, X.; Caspi, S.; Cheng, D. W.; Dietderich, D. R.; Felice, H.; Ferracin, P. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Joining of melt-textured YBCO : a direct contact method.

Description: We report a method for making weld joints, capable of transmitting high supercurrent densities, in bulk samples of melt textured YBCO. The joining procedure is carried out in a flowing atmosphere of O{sub 2} to eliminate problems associated with nitrogen gas, which can become trapped in the joint. No filler or fluxing material is used. The method can be used to join large areas (several cm{sup 2}) that are capable of transmitting supercurrent densities exceeding 10{sup 4} A/cm{sup 2}.
Date: December 19, 2001
Creator: Chen, L.; Claus, H.; Paulikas, A. P.; Zheng, H. & Veal, B. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Controlled densification of mullite for composite applications.

Description: As part of an effort to fabricate oxide-based fibrous monolithic ceramics, sintering of mullite has been examined. The effects of Y{sub 2}O{sub 3} additions on sinterability of sol-gel-derived mullite and on the resulting microstructure were evaluated over a range of compositions, sintering times, and temperatures. Electron microscopy, X-ray diffraction, differential thermal analysis, and density measurements indicated that the Y{sub 2}O{sub 3} additions promoted densification through formation… more
Date: May 19, 1999
Creator: Cruse, T. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Combustion synthesis and engineering of nanoparticles for electronic, structural and superconductor applications. Annual progress report, December 1, 1992--August 19, 1993

Description: Fully dense, nanocrystalline ceramic articles were prepared by a new nanofabrication process. The process consists of two steps: synthesis of ceramic nanoparticles and fabrication of dense, nanocrystalline ceramic parts. The synthesis step produced 10-nanometer-diameter crystallites, and is capable of being scaled up to kilogram/hour production rates. The fabrication step produced dense parts at significantly reduced sintering temperatures and times--representing a factor of 10--100 reduction i… more
Date: August 19, 1993
Creator: Stangle, G. C.; Amarakoon, V. R. W. & Schulze, W. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Practical superconductor development for electrical power applications quarterly report for the period ending March 31, 2000

Description: This is a multiyear experimental research program focused on improving relevant material properties of high-T{sub c} superconductors (HTSs) and on development of fabrication methods that can be transferred to industry for production of commercial conductors. The development of teaming relationships through agreements with industrial partners is a key element of the Argonne program. Recent results are presented on YBa{sub 2}Cu{sub 3}O{sub x} (Y-123) coated conductors, sheathed (Bi,Pb){sub 2}Sr{s… more
Date: April 19, 2000
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The effect of disorder on the critical points in the vortex phase diagram of YBCO

Description: The effect of line disorder induced by heavy ion irradiation and of point disorder induced by proton and electron irradiation on the upper and lower critical points in the vortex phase diagram of YBCO is presented. The authors find that dilute line disorder induces a Bose glass transition at low fields which is replaced at the lower critical point by first order melting at higher fields. Strong pinning point defects raise the lower critical point, while weak pinning point defects have little or… more
Date: January 19, 2000
Creator: Crabtree, G. W.; Kwok, W. K.; Paulius, L. M.; Petrean, A. M.; Olsson, R. J.; Karapetrov, G. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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