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Development of Low-Cost Manufacturing Processes for Planar, Multilayer Solid Oxide Fuel Cell Elements

Description: This report summarizes the results of Phase II of this program, 'Low-Cost Manufacturing Of Multilayer Ceramic Fuel Cells'. The objective of the program is to develop advanced ceramic manufacturing technologies for making planar solid oxide fuel cell (SOFC) components that are more economical and reliable for a variety of applications. Phase II development work focused on three distinct manufacturing approaches (or tracks) for planar solid oxide fuel cell elements. Two development tracks, led by… more
Date: September 30, 2001
Creator: Swartz, Scott; Seabaugh, Matthew; Dawson, William; Armstrong, Tim; Anderson, Harlan & Lannutti, John
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The early stages of microstructural development of the colony structure in Bi-2223 tapes.

Description: The current protocol for processing (Bi,Pb)2Sr2Ca2Cu3010-(B i-2223) multifilamentary tapes involves the in situ formation of the primary phase from a suitable mixture of precursor phases. As such, the developments during the first few minutes of heat treatment determine to a large extent the efficiency of primary phase development, competing secondary phase development, texture evolution, and grain-to-grain connectivity. This work documents the development of the liquid phase, secondary phases,… more
Date: January 1, 2001
Creator: Holesinger, T. G. (Terry G.)
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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LOW TEMPERATURE CATHODE SUPPORTED ELECTROLYTES

Description: This project has three main goals: Thin Films Studies, Preparation of Graded Porous Substrates and Basic Electrical Characterization and testing of Planar Single Cells. In this portion of study we have focused on producing YSZ films on porous LSM substrates. When using the polymer precursor there are a number of obstacles to overcome in order to form dense electrolyte layers on porous substrates (cathode or anode). Probably the most difficult problems are: (1) Extreme penetration of the polymer… more
Date: September 30, 2001
Creator: Anderson, Harlan U.; Huebner, Wayne & Kosacki, Igor
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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SUSTAINED STABILIZATION OF THE RESISTIVE WALL MODE BY PLASMA ROTATION IN THE DIII-D TOKAMAK

Description: OAK-B135 A path to sustained stable operation, at plasma pressure up to twice the ideal magnetohydrodynamic (MHD) n = 1 free-boundary pressure limit, has been discovered in the DIII-D tokamak. Tuning the correction of the intrinsic magnetic field asymmetries so as to minimize plasma rotation decay during the high beta phase and increasing the angular momentum injection, have allowed maintaining the plasma rotation above that needed for stabilization of the resistive wall mode (RWM). A new metho… more
Date: October 1, 2001
Creator: Garofalo, A. M.; Strait, E. J.; Johnson, L. C.; La Haye, R. J.; Lazarus, E. A; Navratil, G. A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Atmospheric Pressure Flow Reactor / Aerosol Mass Spectrometer Studies of Tropospheric Aerosol Nucleat and Growth Kinetics. Final Report, June, 2001

Description: The objective of this program was to determine the mechanisms and rates of growth and transformation and growth processes that control secondary aerosol particles in both the clear and polluted troposphere. The experimental plan coupled an aerosol mass spectrometer (AMS) with a chemical ionization mass spectrometer to provide simultaneous measurement of condensed and particle phases. The first task investigated the kinetics of tropospheric particle growth and transformation by measuring vapor a… more
Date: June 1, 2001
Creator: Worsnop, Douglas R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Evaluation of NF3 versus Dimethylhydrazine as N sources for GaAsN: Preprint

Description: Presented at the 2001 NCPV Program Review Meeting: Hydrazine, NF{sub 3}, dimethylhydrazine, trimethylgallium, and triethylgallium are studied for the growth of GaAs{sub 1-x}N{sub x} by metal-organic chemical-vapor deposition (MOCVD). NF{sub 3} is shown to incorporate nitrogen very much like hydrazine, both of which are more efficient nitrogen sources than di-methylhydrazine. The choice of gallium precursor (triethyl-gallium or trimethylgallium) also affects the nitrogen incorporation. The growt… more
Date: October 1, 2001
Creator: Kurtz, S.; Reedy, R.; Keyes, B.; Barber, G.; Geisz, J.; Friedman, D. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Photon and electron stimulated surface dynamics of single molecules. Final report on D.O.E. No. DE-FG0295ER14563

Description: The initial goal of this work was to build up an entirely new low-temperature scanning tunneling microscopy (STM) and ultrahigh vacuum system to examine the electron- and photon-induced chemistry of single molecules at low surface temperatures where thermal diffusion would be quenched. The photochemistry of methyl bromide on Pt(111) was first examined at 90 K using liquid nitrogen cooling. Br atoms were quite mobile even at 90 K, and were only visible by STM when coalesced along Pt step edges o… more
Date: May 1, 2001
Creator: Harrison, Ian
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Melt Rate Improvement for DWPF MB3: Crucible Studies

Description: The objective of this research is to evaluate the melting behavior of Macrobatch 3 (MB3) for the Defense Waste Processing Facility (DWPF). This study focuses on the manipulation of the frit composition in order to enhance the melting rate of MB3, without sacrificing the quality of the final glass form. The goal is to find the proper frit composition so the development of this insulating layer is averted.
Date: June 15, 2001
Creator: Lorier, T.H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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DEVELOPMENT OF A FACILITY MONITORING TESTBED

Description: The Advanced Surveillance Technology (AST) project at Los Alamos National Laboratory (LANL), funded by the Nonproliferation Research and Engineering Group (NN-20) of the National Nuclear Security Administration (NNSA), is fielding a facility monitoring application testbed at the National High Magnetic Field Laboratory-Pulsed Field Laboratory (NHMFL-PFL). This application is designed to utilize continuous remote monitoring technology to provide an additional layer of personnel safety assurance a… more
Date: June 1, 2001
Creator: MIELKE, A. M.; BOYLE, C. M. & AL, ET
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Nucleation of YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} in the BaF{sub 2} Process.

Description: The nucleation of the c-axis aligned and non-c-axis YBa{sub 2}Cu{sub 3}O{sub {approximately}6.1} (YBCO) from precursor films on [001]-cut SrTiO{sub 3} was investigated for the so-called BaF{sub 2} process. Specimens with different thickness were quenched from 735 C, then studied by transmission electron microscopy and x-ray diffraction techniques. Preceding the formation of YBCO nuclei, three intermediate phases of (Y,Ba) oxy-fluoride and a transition phase without F were found in the precursor… more
Date: June 24, 2001
Creator: Wu, L.; Solovyov, V. F.; Wiesmann, H. J.; Zhu, Y. & Suenaga, M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Production and application of synthetic precursors labeled with carbon-11 and fluorine-18

Description: It is evident from this chapter that there is enormous flexibility both in the selection of the nature of the radioisotope and ways to generate it, as well as in the selection of the labeling precursor to appropriately attach that radioisotope to some larger biomolecule of interest. The arsenal of radiolabeling precursors now available to the chemist is quite extensive, and without a doubt will continue to grow as chemists develop new ones. However, the upcoming years will perhaps reflect a gre… more
Date: April 2, 2001
Creator: Ferrieri, R. A.
Item Type: Refine your search to only Book
Partner: UNT Libraries Government Documents Department
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Novel synthesis of [11C]GVG (Vigabatgrin) for pharmacokinetic studies of addiction treatment

Description: We report here a novel synthetic route to prepare the precursor and to efficiently label GVG with C-11. 5-Bromo-3-(carbobenzyloxy)amino-1-pentene was synthesized in five steps from homoserine lactone. This was used in a two step radiosynthesis, displacement with [{sup 11}C]cyanide followed by acid hydrolysis to afford [{sup 11}C]GVG with high radiochemical yields (> 35%, not optimized) and high specific activity (2-5 Ci/{micro}mol). The [{sup 11}C]cyanide trapping was achieved at {minus}5 C … more
Date: June 10, 2001
Creator: Ding, Y. S.; Studenov, A. R.; Zhang, Z.; Gerasimov, M.; Schiffer, W.; Dewey, S. L. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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CIS-Type PV Device Fabrication by Novel Techniques; Phase II Subcontract Report 1 July 1999--31 June 2000

Description: The R and D program at ISET is centered on development of a novel, dispersion-based route to the deposition of precursor thin films that are converted to CIS-type absorbers through high temperature reactions at or close to atmospheric pressure. The goal of the current research program at ISET is to bring a non-vacuum processing route for CIS closer to commercialization by improving the device efficiency through an increase in absorber bandgap. The basic processing approach involves first synthe… more
Date: January 22, 2001
Creator: Fisher, M. L. & Kapur, V. K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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MESO-SCALE SIMULATIONS OF COMPACTION WAVES IN A GRANULAR BED

Description: A granular bed provides an extreme example of a heterogeneous material. Behind a moderate strength wave, the shock compression in a granular material is due to squeezing out pore space rather than an increase in the density of individual grains. This type of shock is known as a compaction wave. The key properties of compaction waves are displayed in mesomechanics simulations--continuum mechanics calculations in which individual grains are resolved. Fluctuations in hydrodynamic quantities occur … more
Date: May 1, 2001
Creator: MENIKOFF, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Nucleation of YBA(2)CU(3)O(7-D) In the BAF(2) Process

Description: The nucleation of the c-axis aligned and non-c-axis YBa{sub 2}Cu{sub 3}O{sub {approximately}6.1} (YBCO) from precursor films on [001]-cut SrTiO{sub 3} was investigated for the so-called BaF{sub 2} process. Specimens with different thickness were quenched from 735 C, then studied by transmission electron microscopy and x-ray diffraction techniques. Preceding the formation of YBCO nuclei, three intermediate phases of (Y,Ba) oxy-fluoride and a transition phase without F were found in the precursor… more
Date: June 24, 2001
Creator: Wu, L.; Solovyov, V. F.; Wiesmann, H. J.; Zhu, Y. & Suenaga, M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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