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  • 1
    Electronic Resource
    Electronic Resource
    Sealing Properties of Ceramic Fiber Composites for SOFC Application (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 124-126 (June 2007), p. 803-806 
    Details
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Notes: For the sealing of solid oxide fuel cells (SOFCs), mid-term (~1,000 h) sealing performancewas examined using composite seals prepared with mixtures of a glass and alumino-silicate ceramicfiber. Leak rate could be reduced to 〈 ~0.04 sccm/cm when using a composite seal with 60 vol%glass. Viscosity of the glass at the seal operating temperature of 650 [removed info] was 2.0×108 dPa·s (log η =8.3) as estimated by beam-bending method, and found to be suitable for sealing operation
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/23/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.124-126.803.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    Removal of Total Organic Carbon from Aqueous Phenol Solution Using Photocatalytic ZnO Nanopowders Prepared by Solution Combustion Method (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 558-559 (Oct. 2007), p. 1335-1338 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: ZnO nanopowders were prepared by Solution Combustion Method (SCM). The ZnOnanopowders synthesized using Zn(OH)2 and glycine as an oxidant and a fuel (with fuel/ oxidantratio, F/O=0.8), showed excellent crystalline and photocatalytic characteristics. To confirmphotocatalytic activities of the prepared ZnO powder, total organic carbon (TOC) was tried to removefrom aqueous phenol solution. Surprisingly, SCM ZnO nanopowder shows 1.6 fold higherdestruction rates of the organic pollutant than P-25 TiO2 nanopowder which is known as a kind ofstandard photocatalyst
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/17/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.558-559.1335.pdf
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  • 3
    Electronic Resource
    Electronic Resource
    Removal of Heavy Metal Ions from Aqueous Pb-EDTA and Cu-EDTA Solutions Using Nanosized ZnO Powders by Solution-Combustion Method (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 317-318 (Aug. 2006), p. 837-840 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: ZnO nanopowder was prepared by a novel “solution-combustion method (SCM)” and itwas used as a semiconductor photocatalyst to evaluate its photoreduction properties. AqueousPb-EDTA and Cu-EDTA solutions of heavy metal ions (Pb and Cu) were used for the photocatalysisreaction under UV illumination. The result was then compared with other semiconductorphotocatalyst powder such as TiO2 powder (P25; Degussa) and TiO2 powder prepared byhomogeneous precipitation process at low temperature (HPPLT). In the removal of Pb++ ions, theZnO nanopowder showed 2.6 fold higher removal rate than P25 TiO2 powder and 1.8 fold higher thanHPPLT TiO2. Also the ZnO nanopowder showed the highest removal rate of the Cu++ ions from thesolution among the different photocatalyst powders compared. The superior photoreduction ability ofthe ZnO nanopowder appears to be due to its excellent UV absorption characteristics. This wasconfirmed by the photoluminescence (PL) measurement
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/51/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.317-318.837.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Synthesis of Solution-Combusted ZnO Nanopowder and Its Application to Gold Recovery (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 317-318 (Aug. 2006), p. 841-844 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Photocatlytic ZnO nanopowders were synthesized by a novel method referred to as“solution-combustion method (SCM)”. They were synthesized using various oxidants and fuels.Single-phase ZnO powders were obtained. The ZnO powder synthesized using Zn(OH)2 and glycineas an oxidant and a fuel at fuel/oxidant ratio of 0.8, showed best powder characteristics such asaverage grain size of 30 nm and the specific surface area of 120 m2/g. The photocatalytic goldrecovery efficiency by this SCM ZnO nanopowders was about 6 fold higher compared to the case bythe state of the art commercial TiO2 nanopowders. The purity of recovered gold was about 99.6% inweight% and 98.8% in atomic%. Especially, in this study it was tried to recover gold metal ions fromnot simulated wastewater but real plating one. This technology is therefore very viable andcost-effective to obtain high purity gold from plating wastewater
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/51/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.317-318.841.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    Photocatalytic Characteristics of Nanometer-Sized Titania Powders Fabricated by a Homogeneous-Precipitation Process (2002)
    Westerville, Ohio : American Ceramics Society
    Journal of the American Ceramic Society 85 (2002), S. 0 
    Details
    ISSN: 1551-2916
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The photocatalytic characteristics of nanometer-sized TiO2 powder prepared by a homogeneous-precipitation process (HPP) were compared with those of a commercial powder to determine which powder was better able to remove metal ions, such as lead and copper, from aqueous equimolar metal-ethylenediaminetetraacetic acid (EDTA) solution. In aqueous lead-EDTA solution, the TiO2 powder fabricated by HPP had 3.5 times higher initial adsorption of lead ion and a 1.5 times faster rate for the complete elimination of lead ions than did the commercial powder. In an aqueous copper-EDTA solution, the TiO2 powder fabricated by HPP also showed higher initial adsorption and a faster elimination rate for copper ions than did the commercial powder. Similarly, the photocatalytic properties were enhanced as the specific surface area increased, and the TiO2 powder fabricated by HPP, which consisted of coagulated primary particles 20 nm in size, with chestnut-burr shapes, had a larger specific surface area (∼180 m2/g) than that of the commercial powder (∼55 m2/g).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1151-2916.2002.tb00094.x
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  • 6
    Electronic Resource
    Electronic Resource
    Photocatalytic Silver Recovery Using ZnO Nanopowders Synthesized by Modified Glycine-Nitrate Process (2003)
    Westerville, Ohio : American Ceramics Society
    Journal of the American Ceramic Society 86 (2003), S. 0 
    Details
    ISSN: 1551-2916
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Zinc oxide (ZnO) powders were synthesized by the modified glycine-nitrate process (MGNP) with various oxidants and fuels. Single-phase ZnO powders were easily obtained regardless of oxidants and fuels. The particle size and shape of ZnO powders were dependent on the types of fuels. The ZnO powder synthesized using Zn(OH)2 and glycine as an oxidant and a fuel, at a fuel/oxidant ratio of 0.8, showed the best powder characteristics, such as an average grain size of 30 nm and the specific surface area of 120 m2/g. The removal of silver ions from the waste-development solution was tried to confirm photocatalytic activities of the synthesized ZnO powder. The silver ions were completely removed within 15 min. This silver recovery rate is three times higher than that of commercial state-of-the-art TiO2. The photoluminescence (PL) measurement also showed the PL intensity at ultraviolet (UV) of the synthesized ZnO powder is almost three times higher than that of commercial state-of-the-art TiO2. The synthesized ZnO nanopowder absorbed more UV than any other powders, including commercial state-of-the-art TiO2 and ZnO powders. This means the high UV absorption efficiency leads to the generation of more electrons that are involved in the reduction of silver ions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1151-2916.2003.tb03505.x
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  • 7
    Electronic Resource
    Electronic Resource
    Formation and diffusion behavior of intermixed and segregated amorphous layers in sputtered NiCr films on Si (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 4023-4029 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Sputter-deposited Ni80Cr20 films on sputter-cleaned Si substrates contain an amorphous layer at the substrate/film interface whose composition is a mixture of all the elements present at the interface. Subsequent thermal processing at 300 °C for 30 min produces a new segregated Cr-rich amorphous layer as Ni atoms preferentially diffuse through and react with the initial amorphous layer and the silicon substrate. Further annealing results in the growth of uniform nanoscale NiSi layers, as long as the segregated a layer is sustained. The amorphous layers eventually crystallize at ∼500 °C and Kirkendall voids are observed at 550 °C. Whereas the formation of intermixed amorphous layers from metal–metal or metal–silicon systems has been reported by several authors, the segregated amorphous layer arising out of the interdiffusion and reaction between a metal alloy and Si is of both fundamental and technological interest due to its thermal stability and ability to control the silicide growth. In this work, we describe the evolution of both kinds of amorphous layers, i.e., intermixed and segregated, so as to elucidate their origins. The evolution of the two a layers is also observed when monolayers of Pt are introduced prior to NiCr deposition. In this case, the growth of the segregated amorphous layer is retarded and it dissolves earlier during thermal annealing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.352869
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  • 8
    Electronic Resource
    Electronic Resource
    NiSi formation through a semipermeable membrane of amorphous Cr(Ni) (1991)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 58 (1991), S. 729-731 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Following heat treatments of Pt encapsulated Ni80Cr20 thin films on silicon substrates at temperatures ranging from 300 to 500 °C, it has been discovered that Cr atoms segregate at the original NiCr/Si interface to form an amorphous layer, while Ni atoms diffuse into the Si to form Ni silicide. The Cr-rich amorphous layer acts as a "semipermeable membrane'' which selectively passes Ni to form a very uniform NiSi layer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.104529
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  • 9
    Electronic Resource
    Electronic Resource
    Sintering Effects of ZnO Nanopowders Synthesized by Solution–Combustion Method (2005)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 486-487 (June 2005), p. 221-224 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: ZnO nanopowders with an average grain size of 30nm were prepared by a solutioncombustion method with various sintering temperatures (100-1000o C). The optical properties of the ZnO nanopowders were investigated in the temperature range of 14-150K in air. Based on the results of XRD, Photoluminescence, and excitation spectra, the ZnO powders showed wurtzite single phase with UV-blue light emitting. Deep level defects such as oxygen vacancies and Zn interstitials werenot observed from the ZnO powders sintered up to 700 o C. However, these defects were observed as the sintering temperature was increased up to 900 o C. This seems to be due to the generation of oxygen vacancies and zinc interstitials. Furthermore, the blue light intensity was doubled when the synthesized ZnO powders were sintered at 700 o C. This might be very useful for high efficiencyphotocatalysts and the blue light emitting phosphors of displays such as field emission displays and plasma display panels
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/10/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.486-487.221.pdf
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  • 10
    Electronic Resource
    Electronic Resource
    Removal of Cu〈sup〉++〈/sup〉 Ions from Aqueous Cu-EDTA Solution Using ZnO Nanopowder (2005)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 486-487 (June 2005), p. 510-513 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Nanometer size zinc oxide (ZnO) powder was prepared by a novel “solution-combustion method (SCM)”, and it was used as a semiconductor photocatalyst to evaluate its photoreduction properties. Aqueous solution of heavy metal ions (Cu-EDTA) was used for the photocatalysis reaction under UV illumination. The result was then compared with other semiconductor photocatalyst powders such as titanium dioxide (TiO2) powder (P25; Degussa) and TiO2 powderprepared by a homogeneous precipitation process at low temperature (HPPLT). The zinc oxide nanopowder showed the highest removal rate of the Cu++ ions from the solution among the photocatalyst powders compared. The superior photoreduction ability of the ZnO nanopowder appears to be due to its excellent UV absorption capacity
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/10/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.486-487.510.pdf
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