Zobrazeno 1 - 10
of 685
pro vyhledávání: '"S. Kemmler‐Sack"'
Resitivity measurements have been performed in La:Sr:Cu:Co:O ceramics in a frequency range from 5Hz – 10 9 Hz. A strongly frequency dependent resistance has been observed in La 2 CUO 4 which we interpret in terms of a smooth dielectric to metal tra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b7203f855d147e0955d74bb8f9d3fc11
https://opus.bibliothek.uni-augsburg.de/opus4/frontdoor/index/index/docId/63032
https://opus.bibliothek.uni-augsburg.de/opus4/frontdoor/index/index/docId/63032
Publikováno v:
Materials Science and Engineering: B. 58:206-214
The most promising material for fabricating long-length conductors is (Bi,Pb)-2223 produced by the powder-in-tube process in Ag clad tapes. Intensive studies have shown that the critical current density of fully processed tapes is affected by a large
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bccf2571a8222883d6c254813dfe40be
https://doi.org/10.1016/s0921-5107(98)00434-6
https://doi.org/10.1016/s0921-5107(98)00434-6
Publikováno v:
Physica C: Superconductivity. 306:119-128
The conditions of melt texturing of bulk (Bi,Pb)-1212 were improved by adaption of (i) the chemical composition of the precursor, (ii) the temperature/time schedule and (iii) the method of post-treatment. It is shown that especially an increase of th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7985574c33c98687c157ad85034bc0a6
https://doi.org/10.1016/s0921-4534(98)00284-6
https://doi.org/10.1016/s0921-4534(98)00284-6
Autor:
S. Kemmler-Sack, J. Lentmaier
Publikováno v:
Materials Research Bulletin. 33:461-473
The catalytic activity of YFeO3-based catalysts in the lean-NOx process was studied for the sulfated perovskite YFeO3, composites between YFeO3 and the solid acid ZrO2, as well as sulfated composites YFeO3/ZrO2. Moreover, a mechanical mixture between
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a02b4c04099f69a2d01b853b283ddc4f
https://doi.org/10.1016/s0025-5408(97)00236-5
https://doi.org/10.1016/s0025-5408(97)00236-5
Publikováno v:
Journal of Alloys and Compounds. 268:16-21
Iron-containing pyrochlores, having ions with various valencies on the B-sites, were investigated by magnetic measurements and Mossbauer spectroscopy. The influence of the ionic radius and of the valence state of the different cations accommodated on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0aa4144355b0bf336eaacfdc8be0749a
https://doi.org/10.1016/s0925-8388(97)00621-x
https://doi.org/10.1016/s0925-8388(97)00621-x
Autor:
K. Brandt, H.-W. Praas, V. Kunczer, S. Kemmler-Sack, P. Endres, V. Klein, A. Ott, M. Rosenberg, Hermann A. Mayer, A. Jäger, G. Filoti, B. Fuchs
Publikováno v:
Journal of Power Sources. 72:1-8
The systems Li1+xMn2−xO4−δ and Li1−xNi1+xO2 were studied as oxidic cathode materials for 4 V rechargeable Li-ion cells. From a comparison of the results it follows that the spinel system can be subdivided into three regions: in region I (0≤x
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1d88c3ddaabe03a566f839d06d75074a
https://doi.org/10.1016/s0378-7753(97)02772-9
https://doi.org/10.1016/s0378-7753(97)02772-9
Publikováno v:
Journal of Power Sources. 69:145-156
The process of chemical lithium extraction from the spinel phase Li1+xMn2−xO4−δ was studied for 0 ≤ x ≤ 0.33 in acidic medium ( H 2 SO 4 H 2 O ) and Br 2 CH 3 CN as proton-free extraction liquid. From a comparison of the quantitative results
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5800bec8c8efbfaa1d3e6a0df591d749
https://doi.org/10.1016/s0378-7753(97)02604-9
https://doi.org/10.1016/s0378-7753(97)02604-9
Publikováno v:
Materials Science and Engineering: B. 48:244-253
The effect of doping on formation, superconductivity and pinning forces of (Bi,Pb)-2223 was studied for several dopants. They can be subdivided into promoters (Cu, Mn at low doping level of x = 0.1 and Rh) and inhibitors (Mg, Al, Sn, Co, Y, Pd and hi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e83e15a3d3b8319737bb19f5e0dcd1a6
https://doi.org/10.1016/s0921-5107(97)00057-3
https://doi.org/10.1016/s0921-5107(97)00057-3
Publikováno v:
Journal of Alloys and Compounds. 256:86-91
A magnetic susceptibility and Mossbauer spectroscopy study of the perovskite Bi 2 FeRhO 6 was undertaken. A freezing start temperature around 270 K was evidenced by both methods, Unlike homogeneous magnetic systems the freezing occurs by involving co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a2b57f697eb470e3de2a4822fa77a628
https://doi.org/10.1016/s0925-8388(96)03110-6
https://doi.org/10.1016/s0925-8388(96)03110-6
Publikováno v:
Materials Chemistry and Physics. 49:211-216
The catalytic activity under selective catalytic reduction conditions for composites between the spinels MgAl2O4 or ZnAl2O4 and CuO are reported. It is shown that the conversion of NO into N2 starts at about 250°C and reaches a maximum value of abou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::433389f8978089a1283fe9aa1f8b84b8
https://doi.org/10.1016/s0254-0584(97)80166-6
https://doi.org/10.1016/s0254-0584(97)80166-6