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  • 74.72.−h  (1)
  • NO x  (1)
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Materialart
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  • 1
    Digitale Medien
    Digitale Medien
    in situ Preparation of superconducting HgBa2CuO4 thin films (1996)
    Springer
    Journal of low temperature physics 105 (1996), S. 1571-1576 
    Details
    ISSN: 1573-7357
    Schlagwort(e): 74.76.Bz ; 74.72.−h
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Superconducting thin films of HgBa2CuO4 have been grown in situ by using a sputtering method for the first time. (100) SrTiO3 was used as substrates and heated between 500 ° C to 600 ° C during the film deposition. By setting the deposition conditions properly, c axis oriented HgBa2CuO4 films were grown perpendicularly to the substrate surface. It was found that Hg composition in the deposited films had close relation to the sputtering gas, namely, the oxygen partial pressure, Hg could remain in the film when the partial pressure of oxygen was lower than in the case of the other oxide superconductors such as Bi cuprates. The optimum oxygen partial pressure for the crystallized thin film ranged from 0.1 Pa to 0.01 Pa with total gas pressure of 0.6 Pa. The superconducting transition was observed at around 75K.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00753924
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Methane Decomposition in a Barium Titanate Packed-Bed Nonthermal Plasma Reactor (1998)
    Springer
    Plasma chemistry and plasma processing 18 (1998), S. 363-373 
    Details
    ISSN: 1572-8986
    Schlagwort(e): Nonthermal plasma ; CH4 ; N2O ; NO x ; CO ; CO2 ; BaTiO3 ; lattice oxygen ; atmospheric pressure
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Maschinenbau , Technik allgemein
    Notizen: Abstract The behavior of lattice oxygen species of the ferroelectric material during methane oxidation was investigated using a nonthermal plasma reactor packed with BaTiO 3 pellets. Lattice oxygen species in BaTiO 3 play an important role in the formation of N 2 O and the oxidation of CH 4 . The oxidation products such as CO and CO 2 were formed from independent reaction pathways. Lattice oxygen species were able to preferentially oxidize the carbon species deposited on the pellet surface into CO. Also, N 2 O and NO x were independently formed in the N 2–O 2 reaction, suggesting that different oxygen species give N 2 O and NO x. N 2 O was produced by the oxidation of molecular nitrogen with lattice oxygen species.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1021897419040
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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