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in subjects: "Silicon Oxides"  
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CO/sub 2/-laser polishing of fused silica surfaces for increased laser damage resistance at 1. 06. mu. m

Description: Bare fused silica surfaces were prepared by subjecting the mechanically polished surface to a rastered cw CO/sub 2/ laser beam. Analysis shows that this processing causes: (a) removal of a uniform layer of fused silica; and (b) a probable re-fusing or healing of existing subsurface fractures. The fused silica removal rate is found to be a function of the laser intensity and scan rate. These surfaces are seen to have very low scatter and to be very smooth. In addition, they have exhibited entran… more
Date: April 3, 1980
Creator: Temple, P. A.; Milam, D. & Lowdermilk, W. H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Model catalytic oxidation studies using supported monometallic and heterobimetallic oxides

Description: This research program is directed toward a more fundamental understanding of the effects of catalyst composition and structure on the catalytic properties of metal oxides. Metal oxide catalysts play an important role in many reactions bearing on the chemical aspects of energy processes. Metal oxides are the catalysts for water-gas shift reactions, methanol and higher alcohol synthesis, isosynthesis, selective catalytic reduction of nitric oxides, and oxidation of hydrocarbons. A key limitation … more
Date: February 3, 1992
Creator: Ekerdt, J. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of novel Sol-Gel Indicators (SGI's) for in-situ environmental measurements: Part 1, Program and a new pH Sol-Gel Indicator

Description: The feasibility of incorporating analytical indicators into a sol-gel glassy matrix and then coating substrates with this composite material has bee demonstrated. Substrates coated include paper, wood, glass, and the lens of an analytical probe. The first SRTC sol-gel indicator, comprising bromophenol blue dispersed in a silica matrix, was fabricated and successfully used to measure solution pH in the range of pH 3.0 to 7.5. material exhibited a quick response time, as measured by color changes… more
Date: November 3, 1992
Creator: Livingston, R. R.; Baylor, L. & Wicks, G. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of Alcohol-Based Synthetic Transportation Fuels From Coal-Derived Synthesis Gases. Third Quarterly Progress Report, April 1-June 30, 1980

Description: Fourteen catalysts were prepared by either evaporation of metal nitrate-citric acid solutions or by impregnation of inert supports with metal nitrate-citric acid solutions. Fourteen catalysts were tested in either the Berty gradientless reactor or the plug-flow reactor. These catalysts have been characterized intto the following five groups: Group I - catalysts containing Cu, Zn, Co, Cr and alkali; Group II - catalysts of Group I without Zn or Co or Cr; Group III - modified methanol synthesis c… more
Date: December 3, 1980
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Depth to and Concentrations of Water in Large Bodies of Silicic Magma. Progress Report, July 1, 1982-June 30, 1983

Description: Large bodies of silicic magma are potential sources of geothermal energy and ore. They also pose threats of catastrophic eruptions. The depths of such bodies are related to their economic potential and probably to their eruption mechanisms. The concentrations of water in the magmas are important for their eruptive and dynamical behavior and for the development of ores. Estimates of viscosity and density of melt require knowledge of concentration of water. The concentration of water in melt befo… more
Date: March 3, 1983
Creator: Anderson, A. T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Development of novel Sol-Gel Indicators (SGI`s) for in-situ environmental measurements: Part 1, Program and a new pH Sol-Gel Indicator

Description: The feasibility of incorporating analytical indicators into a sol-gel glassy matrix and then coating substrates with this composite material has bee demonstrated. Substrates coated include paper, wood, glass, and the lens of an analytical probe. The first SRTC sol-gel indicator, comprising bromophenol blue dispersed in a silica matrix, was fabricated and successfully used to measure solution pH in the range of pH 3.0 to 7.5. material exhibited a quick response time, as measured by color changes… more
Date: November 3, 1992
Creator: Livingston, R. R.; Baylor, L. & Wicks, G. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Development of Alcohol-Based Synthetic Transportation Fuels From Coal-Derived Synthesis Gases. Fourth Quarterly Progress Report, July 1-September 30, 1980

Description: Twenty-four catalysts were prepared by either evaporation of metal nitrate-citric acid solutions, by impregnation of methanol synthesis catalysts or by coprecipitation with KOH. Seventeen catalysts were tested in either the Berty gradientless reactor or the plug-flow reactor. These catalysts have been characterized into the five groups. A CuCoZn/sub 0/ /sub 125/Fe/sub 0/ /sub 1/Th/sub 0/ /sub 5/K/sub 0/ /sub 11/ catalyst produced by evaporation of metal nitrate-citric acid solutions resulted in… more
Date: December 3, 1980
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Thermodynamics of Li/sub 2/O and other breeders for fusion reactors

Description: Thermodynamic calculations have been made to compare the thermochemical performance of the fusion reactor breeder blanket materials, Li/sub 2/O, LiAlO/sub 2/, and Li/sub 4/SiO/sub 4/ in the temperature range 900 to 1300K and in the oxygen activity range 10/sup -25/ to 10/sup -5/. In general, LiAlO/sub 2/ offers advantages over Li/sub 2/O, and Li/sub 2/O in turn appears better than Li/sub 4/SiO/sub 4/. The protium purge technique of enhancing tritium release is explored for the LiAlO/sub 2/ syst… more
Date: December 3, 1984
Creator: Fischer, A. K. & Johnson, C. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Interfacial Microstructure Formed by Reactive Metal Penetration of Al into Mullite

Description: Microstructures in the reaction interface between molten Al and dense mullite have been studied by transmission electron microscopy to provide insight into mechanisms for forming ceramic-metal composites by reactive metal penetration. The reactions, which have the overall stoichiometry, 3Al{sub 6}Si{sub 2}O{sub 13} + (8 + x)Al {r_arrow} 13Al{sub 2}O{sub 3} + xAl + 6Si, were carried out at temperatures of 900, 1100, and 1200 C for 5 minutes and 60 minutes, and 1400 C for 15 minutes. Observed pha… more
Date: March 3, 1999
Creator: Du, T. B.; Ewsuk, K. G.; Fahrenholtz, W. G.; Loehman, R. E. & Lu, P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Development of precipitated iron Fischer-Tropsch catalysts. Quarterly technical progress report, 1 January 1996--31 March 1996

Description: The overall contract objectives are to: (1) demonstrate repeatability of performance and preparation procedure of two high activity, high alpha iron Fischer-Tropsch catalysts synthesized at Texas A&M University (TAMU); (2) seek potential improvements in the catalyst performance through variations in process conditions, pretreatment procedures and/or modifications in catalyst synthesis; (3) investigate performance of catalysts in a small scale bubble column slurry reactor, and (4) investigate fe… more
Date: June 3, 1996
Creator: Bukur, D.B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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On-line tests of organic additives for the inhibition of the precipitation of silica from hypersaline geothermal brine

Description: A number of compounds have been screened as potential scale control agents by examining their effect on the precipitation of silica from Magmamax No. 1 brine. The substances were tested using the Lawrence Livermore Laboratory scale-control test system at the Niland, California, test site. Solutions of the test substances were injected into flowing brine at approx. 200/sup 0/C, the brine was flashed at 125/sup 0/C, and then the kinetics of solids and silica precipitation from effluent brine held… more
Date: April 3, 1979
Creator: Harrar, J. E.; Locke, F. E.; Lorensen, L. E.; Otto, C. H., Jr.; Deutscher, S. B.; Frey, W. P. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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