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@ARTICLE{Schober:29435,
      author       = {Schober, T. and Meuffels, P.},
      title        = {{E}lectrically operated hydrogen and oxygen vacuum leaks
                      using ceramic high-temperature ionic conductors},
      journal      = {Journal of vacuum science $\&$ technology / A},
      volume       = {19},
      issn         = {0734-2101},
      address      = {New York, NY},
      publisher    = {Inst.},
      reportid     = {PreJuSER-29435},
      pages        = {958 - 962},
      year         = {2001},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {Ceramic high-temperature proton conductor tubes
                      (BaZr0.9Y0.1O3-x, CaZr0.9In0.1O3-x and Ba3Ca1.18Nb1.82O9-x)
                      were found to be suited for introducing hydrogen into a
                      vacuum system. Leak rates below 10(-8) mbar Vs for the
                      assembly, consisting of an active and an 8YSZ support tube,
                      were achieved. The partial pressure of hydrogen in the
                      vacuum system increased lineally with the electric current J
                      flowing through the proton conductor. The other relevant
                      partial pressures were not affected. Measuring the
                      throughput during operation of the hydrogen source showed
                      that within experimental error the total current is used to
                      transport protons to the cathode (transport number t(H)
                      approximate to 1). The number of moles of H-2 pumped into
                      the system per second is given by J/2F. Thus, the device can
                      be used to precisely introduce high purity Hz under current
                      control, and with a response time of a few seconds only,
                      into the vacuum. Similarly, 8YSZ tubes are suitable fur the
                      pumping of high purity O-2 into a system with a rate given
                      by J/4F moles of O-2/s. Since the amount of H-2 or O-2
                      introduced is precisely known, the present devices can be
                      used for pressure calibration when the local effective
                      pumping speed is known, or else to measure pumping speeds or
                      conductances when accurate pressure measurements are
                      available. (C) 2001 American Vacuum Society.},
      keywords     = {J (WoSType)},
      cin          = {IFF-EKM},
      ddc          = {530},
      cid          = {I:(DE-Juel1)VDB35},
      pnm          = {Festkörperforschung für die Informationstechnik},
      pid          = {G:(DE-Juel1)FUEK54},
      shelfmark    = {Materials Science, Coatings $\&$ Films / Physics, Applied},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000168922300037},
      doi          = {10.1116/1.1355761},
      url          = {https://juser.fz-juelich.de/record/29435},
}