Zobrazeno 1 - 10
of 53
pro vyhledávání: '"Tilman Schober"'
Publikováno v:
Bautechnik. 89:712-718
Fur die Austragung der FIFA Fusball-Weltmeisterschaft 2014 in Brasilien werden seit 2008 mehrere Stadien neu geplant und gebaut, andere werden erweitert und modernisiert. Vier Projekte werden in diesem Beitrag vorgestellt. Drei davon befinden sich in
Autor:
Tilman Schober
Publikováno v:
Ionics. 12:131-134
Commercial silica gel drying pearls were used in impedance measurements between ambient temperature and 300 °C in dry and humid atmospheres. A pronounced difference was seen supporting previous conclusions that proton conduction was operative in the
Autor:
Tilman Schober
Publikováno v:
Solid State Ionics. 177:471-474
The systems Sr 6 Ta 2 O 11 –H 2 O and Sr 5.92 Ta 2.08 O 11.12 –H 2 O were investigated. At high temperatures, both compounds are normal proton conductors but at lower temperatures show the formation of hydrate phases (here labelled β-phases). Th
Autor:
Arnaud Magrez, Tilman Schober
Publikováno v:
Ionics. 11:171-176
We optimize the preparation of BZY20 and BCY10 by a wet chemistry route (the polyacrylamide gel process) and mixed oxide route, respectively. For both materials, the purity of powders drastically depends on the annealing conditions of the raw materia
Autor:
Hans G. Bohn, Tilman Schober
Publikováno v:
Journal of the American Ceramic Society. 83:768-772
The impedance of the cubic perovskite BaZr0.9Y0.1O3-δ has been systematically investigated in dry and wet atmospheres at high and low oxygen partial pressures. In the grain interior, conductivity contributions from oxygen ions, electron holes, and p
Autor:
Jochen Friedrich, Tilman Schober
Publikováno v:
Journal of the American Ceramic Society. 82:3125-3128
The compound Ba3Ca1.18Nb1.82O9-delta (BCN18) has been discussed recently as a promising high-temperature proton conductor. Oxygen loss under very reducing conditions has been determined quantitatively using thermogravimetry. The thermodynamic paramet
Autor:
Paul Meuffels, Tilman Schober
Publikováno v:
Journal of the American Ceramic Society. 84:1996-2000
Tubes of ceramic high-temperature proton conductors (CaZr0.9In0.1O3−x,BaZr0.9Y0.1O3−x, and Ba3Ca1.18Nb1.82O9−x)were used to introduce hydrogen into a vacuum system. A prerequisite was a leak rate below 10−8mbar/s for an assembly consisting of
Autor:
Tilman Schober, Arnaud Magrez
Publikováno v:
Solid State Ionics. 175:585-588
Three wet chemistry routes were used to synthesize Ba0.99Zr0.8Y0.2O3-delta (BZY20) and to avoid the drawbacks of the conventional mixed oxide route used for its preparation. Pure samples were prepared using the Matrix Trapping and Decomposition (MTD)
Autor:
Theodor Schneller, Tilman Schober
Publikováno v:
Solid State Ionics. 164:131-136
A hybrid-type chemical solution deposition (CSD) process for the fabrication of dense proton conducting BaZr0.80Y0.20O(3 x) (BZY20) films has been developed. The propionate based precursor solution showed an excellent longterm stability of more than
Autor:
Tilman Schober
Publikováno v:
Solid State Ionics. :277-281
A classification of the possible applications is given first. For certain cases, the emf of a concentration cell is the dominant quantity as in some sensors. For other cases, the protonic current is of interest. In some applications the chemical reac