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Electrochemical photovoltaic cells/stabilization and optimization of II-VI semiconductors. First technical progress report, 15 April 1980-30 June 1980

Description: The overall goal of this program is to provide the basis for designing a practical electrochemical solar cell based on the II-VI compound semiconductors. Emphasis is on developing new electrolyte redox systems and electrode surface modifications which will stabilize the II-VI compounds against photodissolution without seriously degrading the long-term solar response. The bulk electrode material properties are also being optimized to provide the maximum solar conversion efficiency and greatest i… more
Date: July 20, 1980
Creator: Noufi, R.; Tench, D. & Warren, L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Collector sealants and breathing. Final Report, 25 September 1978-31 December 1979

Description: The objectives of this program were: (1) to investigate the pertinent properties of a variety of possible sealants for solar collectors and identify the most promising candidates, and (2) to study the effect of breathing in flat-plate, thermal solar collector units. The study involved two types of sealants, Class PS which includes preformed seals or gaskets and Class SC which includes sealing compounds or caulks. It was the intent of the study to obtain data regarding initial properties of cand… more
Date: February 20, 1980
Creator: Mendelsohn, M A; Luck, R M; Yeoman, F A & Navish, Jr, F W
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Selective emitter. Task II topical report for radiative-cooling materials

Description: The theoretical basis of the selective emitter is that, if a material emits only in the 8-13 micron interval, it will absorb only in the same interval. After a survey of several candidate materials, the silicon oxynitride system was found to have better optical properties than previously used materials as well as economic feasibility, and efforts to acquire a sample are described. Other promising materials are described: polyvinylidene fluoride (Tedlar), silicon monoxide, silicon dioxide, and s… more
Date: September 20, 1981
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Evaluation of anion exchange resins for processing plutonium--neptunium residues

Description: An anion exchange process was developed to process miscellaneous residues of plutonium plus 0.5 wt % neptunium to allow prompt return of the plutonium to a plutonium recovery process. Several macroreticular anion exchange resins were compared to Dowex 1-X4 for the process. Dowex 1-X4 showed the best performance for the plutonium (III)-neptunium(IV) separation.
Date: August 20, 1977
Creator: Navratil, J. D. & Leebl, R. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Investigation of methods to transfer heat from solar liquid-heating collectors to heat storage tanks. Final report

Description: A study was made of the methods available to transfer heat from the collector to the water storage tank in water heating systems. In counterflow heat exchangers used in double loop water heating systems, it was found to be more important to use a high water flowrate than a high heat transfer fluid flowrate. It was earlier thought to be best to have matched WC/sub p/ (mass flowrate-specific heat) products in the loops. It was shown in this study that the water WC/sub p/ product should be about t… more
Date: April 20, 1978
Creator: Horel, J. D. & de Winter, F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Estimating the Cerenkov neutron sensitivity of Suprasil (SiO/sub 2/) and Lucite (C/sub 5/H/sub 8/O/sub 2/)

Description: Fast neutrons hitting a sample of suprasil will produce light. This light is Cerenkov light produced by high energy (> .2 MeV) electrons traversing the transparent medium. Neutrons produce these electrons in a two step process. First, the neutrons inelastically scatter with either the silicon (Si) or the oxygen (O) atoms producing inelastic gamma rays. Some of these gammas, in turn, will also react producing, primarily, Compton electrons with some pair production electrons possible. The majorit… more
Date: April 20, 1982
Creator: Clark, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Fast ignition relevant study of the flux of high intensity laser-generated electrons via a hollow cone into a laser-imploded plasma

Description: An integrated experiment relevant to fast ignition. A Cu-doped deuterated polymer spherical shell target with an inserted hollow Au cone is imploded by a six-beam 900-J, 1-ns laser. A 10-ps, 70-J laser pulse is focused into the cone at the time of peak compression. The flux of high-energy electrons through the imploded material is determined from the yield of Cu K{sub {alpha}} fluorescence by comparison with a Monte Carlo model. The electrons are estimated to carry about 15% of the laser energy… more
Date: November 20, 2007
Creator: Key, M
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

"Smart" Multifunctional Polymers for Enhanced Oil Recovery

Description: Recent recommendations made by the Department of Energy, in conjunction with ongoing research at the University of Southern Mississippi, have signified a need for the development of 'smart' multi-functional polymers (SMFPs) for Enhanced Oil Recovery (EOR) processes. Herein we summarize research from the period of September 2003 through March 2007 focusing on both Type I and Type II SMFPs. We have demonstrated the synthesis and behavior of materials that can respond in situ to stimuli (ionic str… more
Date: March 20, 2007
Creator: McCormick, Charles & Lowe, Andrew
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Demonstration of Technology for the Production of High Value Materials from the Ultra-Fine (PM 2.5) Fraction of Coal Combustion Ash

Description: Three types of chemically and functionally different thermoplastic polymers have been chosen for evaluation with the fly ash derived filler: high density polyethylene (HDPE), thermoplastic elastomer (TPE) and polyethylene terephthalate (PET). The selections were based on volumes consumed in commercial and recycled products. The reference filler selected for comparison was 3 {micro}m calcium carbonate, a material which is commonly used with all three types of polymers. A procedure to prepare fil… more
Date: July 20, 2006
Creator: Perrone, R. S.; Groppo, J. G. & Robl, T. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

DOE Award No. DE-FC36-03GO13108 Novel Non-Precious Metal Catalysts for PEMFC: Catalyst Selection Through Molecular Modeling and Durability Studies Final Report (September 2003 – October 2008)

Description: The objective of this project is to develop novel non-precious metal electrocatalysts for oxygen reduction reaction (ORR), and demonstrate the potential of the catalysts to perform at least as good as conventional Pt catalysts currently in use in polymer electrolyte membrane fuel cell (PEMFC) with a cost at least 50 % less than a target of 0.2 g (Pt loading)/peak kW and with durability > 2,000 h operation with less than 10 % power degradation. A novel nitrogen-modified carbon-based catalyst was… more
Date: February 20, 2009
Creator: Popov, Branko N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

X-Ray Reflectivity vs Mirror Surface Quality

Description: In an attempt to correlate x ray reflectivity with carbon mirror surface quality the relative reflectivity of five mirrors of different smoothness and optical flatness is compared. Measured and theoretical reflectivity values are in agreement for mirror smoothness <30 A and optical flatness <1000 A. Other correlation could not be established. 4 references.
Date: January 20, 1979
Creator: Stoering, J. P.; Rice, M.; Burginyon, G. A.; Crabb, R.; Augusta, E. L. & Wang, C. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Ocean thermal energy conversion cold water pipe preliminary design project. Appendices to final report

Description: NOAA/DOE has selected three concepts for a baseline design of the cold water pipe (CWP) for OTEC plants: (1) a FRP CWP of sandwich wall construction suspended from the Applied Physical Laboratory/John Hopkins University (APL/JHU) barge at a site 200 miles east of the coast of Brazil using a horizontal deployment scheme; (2) an elastomer CWP suspended from the APL/JHU barge off the southeast coast of Puerto Rico using either a horizontal or vertical deployment scheme; and (3) a polyethylene CWP … more
Date: November 20, 1979
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Characterization of Kevlar 49 fibers by electron paramagnetic resonance. Final report, 20 May 1981-20 June 1982. [Radicals induced by ultraviolet or fracture]

Description: EPR was used to investigate the free radicals created in Kevlar 49 fibers by stress-induced and photo-induced macromolecular chain scissions. Mn/sup +2/ ions were identified from the EPR spectrum of frozen solutions of concentrated sulfuric acid containing Kevlar 49. Other ions present are Cu/sup +2/, and possibly Fe/sup +3/, Cr/sup +3/, and Ti/sup +3/. EPR lineshape anisotropy indicates that some of the metal ions and first coordinate spheres are oriented. The concentration of stress-induced r… more
Date: June 20, 1982
Creator: Brown, I.M. & Sandreczki, T.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Electrochemical photovoltaic cells stabilization and optimization of II-VI semiconductors. Third technical progress report, 1 October 1980 to 31 December 1980

Description: A program to provide the basis for designing a practical electrochemical solar cell based on the II-VI compound semiconductors is described. Emphasis is on developing new electrolyte redox systems and electrode surface modifications which will stabilize the II-VI compounds against photodissolution without seriously degrading the long-term solar response. Work on redox couple stabilization of n-CdX photoanodes has focused on fast metal-based one-electron couples in various nonaqueous solvents wh… more
Date: January 20, 1981
Creator: Noufi, R.; Tench, D. & Warren, L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A Model-Fitting Approach to Characterizing Polymer Decomposition Kinetics

Description: The use of isoconversional, sometimes called model-free, kinetic analysis methods have recently gained favor in the thermal analysis community. Although these methods are very useful and instructive, the conclusion that model fitting is a poor approach is largely due to improper use of the model fitting approach, such as fitting each heating rate separately. The current paper shows the ability of model fitting to correlate reaction data over very wide time-temperature regimes, including simulta… more
Date: July 20, 2004
Creator: Burnham, A K & Weese, R K
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Selective flotation of fossil resin from western coal

Description: The test program has demonstrated that: (1) technically, the new flotation technologies discovered at the University of Utah and then improved upon by Advanced Processing Technologies, Inc. provide a highly efficient means to selectively recover fossil resin from coal. The proof-of-concept continuous flotation circuit resulted in fossil resin recovery with the same separation efficiency as was obtained from laboratory bench-scale testing (more than 80% recovery at about 80% concentrate grade); … more
Date: March 20, 1992
Creator: Jensen, G. F. & Miller, J. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Properties of epoxy resins used in wet filament winding

Description: Data on the properties of epoxy resin systems studied at Lawrence Livermore Laboratory have been collected and are presented in tabular form. Information is included on the chemical nature of the resins and curing agents, as well as data sheets for each system. Included in the data sheets are the composition of the system (resin, diluent, and curing agent); the cure schedule; tensile, compressive, and shear data; viscosity, gel time, and exotherm; density, shrinkage, and water absorption; the t… more
Date: August 20, 1976
Creator: Rinde, J. A. & Newey, H. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Reclaiming process for scrap deuterated polyethylene (CD/sub 2/)

Description: A laboratory version of a process to clean contaminated deuterated polyethylene (CD/sub 2/) was modified slightly and scaled up to produce 2 lb of clean, reusable CD/sub 2/ polymer. A complete cycle of the process is: (1) Melt the CD/sub 2/ polymer at 30 vol percent in xylene at 105 to 110/sup 0/C. (2) Pressure filter the hot solution at 103 to 138 kPa (15 to 20 psi). (3) Cool the solution to precipitate the polymer and separate it from the liquor. (4) Vacuum dry the precipitate at about 266 Pa… more
Date: May 20, 1976
Creator: Caley, L. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Synthesis and Characterization of Novel Preceramic Polymer for SiC

Description: Polyphenylcarbosilane as a novel preceramic polymer for SiC was synthesized from thermal rearrangement of polymethylphenylsilane around 350 C {approx} 430 C. Characterization of synthesized polyphenylcarbosilane was performed with {sup 29}Si, {sup 13}C, {sup 1}H NMR, FT-IR, TG, XRD, and GPC analysis. From FT-IR data, the band at 1035 cm{sup -1} was very strong and assigned to CH{sub 2} bending vibration in Si-CH{sub 2}-Si group, indicating the formation of the polyphenylcarbosilane. The average… more
Date: August 20, 2009
Creator: Lee, Y. J.; Lee, J. H.; Kim, S. R.; Kwon, W. T.; Oh, H.; Klepeis, J. P. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Low Cost, Light Weight SOlar Modules Based on Organic Photovoltaic Technology

Description: Objectives - In order to produce solar modules for rooftop applications the performance and the lifetime must be improved to 5% - 7% and &gt;10 year life. Task 1 Stability - (1) Flexible modules are stable to 1000 hrs at 65 C/85%RH, (2) Flexible modules in glass are stable to &gt;2000 hrs at 85 C/85%RH (no decrease in performance); (3) Adhesive + filler helps stabilize modules; and (4) Solution coatable barriers exhibit good WVTR; work in-progress. Task 2 Performance: n-type charge carriers - (… more
Date: September 20, 2009
Creator: Gaudiana, Russell; GInley, David & Birkmeyer, Robert
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Monte Carlo efficiency predictions for a portable /sup 3/He neutron detector

Description: A small, manportable neutron detector using 18 /sup 3/He proportional counters arranged in 3 banks within a polyethylene moderator is described. Each counter is 25 mm in diameter and 340 mm long (sensitive length) and is filled with highly purified /sup 3/He to a pressure of 400 kPa (4 atm). Measurements of the detector efficiency were made using a calibrated /sup 252/Cf neutron source. Then, independent calculations of the detector efficiency were performed with the TART Monte Carlo transport … more
Date: October 20, 1976
Creator: O'Dell, A. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Boron-filled elastomers (SANL 252-056). [Vinyl copolymer; Viton A fluoroelastomer; physical characteristics]

Description: A series of boron-filled vinyl copolymer elastomer (VCE) and Viton A fluoroelastomer formulations was prepared and the physical characteristics of the cured formulations determined. Their weight loss on heating to 300/sup 0/C, as determined by two different analytical methods, did not agree. The presence of up to 0.23 percent boric acid in the boron powders used to fill a standard boron-filled VCE elastomer did not appear to affect the physical characteristics of the cured formulation. 7 tables… more
Date: April 20, 1976
Creator: Schneider, R. E. & Hartzel, L. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Radiation effects in polymers for plastic scintillation detectors

Description: Radiation damage studies were performed on polystyrene and poly(vinyltoluene) samples containing different concentrations of either an antioxidant (A O-2) or a plasticizer (PP-4). In addition, parallel studies were carried out utilizing samples of these polymers prepared in the presence of cross-linking agents such as NPG, HDA, and DVB. The samples were irradiated using a {sup 60} Co source to total doses of 1 and 10 Mrad, at a dose rate of approximately 1 Mrad/h. Transmittance measurements wer… more
Date: April 20, 1994
Creator: Pla-Dalmau, A.; Bross, A. D.; Hurlbut, C. R. & Moser, S. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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CLOSE-OUT REPORT FOR HYS ELECTROLYZER COMPONENT DEVELOPMENT WORK AT SAVANNAH RIVER NATIONAL LABORATORY

Description: The chemical stability, sulfur dioxide transport, ionic conductivity, and electrolyzer performance have been measured for several commercially available and experimental proton exchange membranes (PEMs) for use in a sulfur dioxide depolarized electrolyzer (SDE). The SDE's function is to produce hydrogen by using the Hybrid Sulfur (HyS) Process, a sulfur based electrochemical/thermochemical hybrid cycle. Membrane stability was evaluated using a screening process where each candidate PEM was heat… more
Date: January 20, 2010
Creator: Colon-Mercado, H.; Elvington, M. & Hobbs, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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