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@PHDTHESIS{Markus:58863,
      author       = {Markus, Torsten},
      title        = {{T}hermochemische {U}ntersuchungen zur
                      {H}ochtemperaturkorrosion von polykristallinem
                      {A}luminiumoxid ({PCA}) durch {M}etallhalogenide},
      volume       = {3955},
      issn         = {0944-2952},
      school       = {Techn. Hochsch. Aachen},
      type         = {Dr. (FH)},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich Gmbh Zentralbibliothek, Verlag},
      reportid     = {PreJuSER-58863, Juel-3955},
      series       = {Berichte des Forschungszentrums Jülich},
      pages        = {167 p.},
      year         = {2002},
      note         = {Record converted from VDB: 12.11.2012; Aachen, Techn.
                      Hochsch., Diss., 2002},
      abstract     = {The accomplished investigations in the context of the
                      available work concerning the hightemperature corrosion of
                      polycrystalline alumina (PCA) by halides of the alkalis and
                      the lanthanides are from special interest in the lamp
                      industry. Mixtures from alkali halides and halides of the
                      lanthanides are an indispensable component of modem metal
                      halide lamps. The halides of the lanthanides produce a very
                      line-rich emission spectrum in the arc of the gas-discharge
                      lamp within the visible range which is very close to that of
                      the natural sunlight. Caused by the high temperatures and
                      temperature gradients in a burner vessel chemical reactions
                      between the lamp filling and the wall of the discharge
                      vessel as well as the electrodes take place. Chemical
                      transport can be observed, which can finally lead to a
                      reduction of the wall thickness and to a failure of the
                      lamp. The goal of this work is the clearingup of the so far
                      not understood mechanisms of the corrosion processes
                      observed in metal halide lamps with PCA bumers. For the
                      improvement of the lamp characteristics it is finally the
                      goal of describing these lamps in a computer-model in order
                      to be able to make statements concerning the corrosion
                      behavior. Apart from the understanding of the corrosion
                      mechanisms it is important for the modelling to identify the
                      foimed corrosion phases and to detemine their themochemical
                      data. The available work makes a contribution to this.},
      cin          = {IWV-2},
      cid          = {I:(DE-Juel1)VDB2},
      pnm          = {Brennstoffzelle},
      pid          = {G:(DE-Juel1)FUEK246},
      typ          = {PUB:(DE-HGF)11 / PUB:(DE-HGF)3},
      url          = {https://juser.fz-juelich.de/record/58863},
}