Zobrazeno 1 - 10
of 52
pro vyhledávání: '"H. Wengeler"'
Publikováno v:
Journal de Chimie Physique. 77:837-841
Two distinctly different proton conductivity mechanisms can be formulated for the simple ionic hydroxides using the optically derived proton lattice potential and the fact that a proton conduction band exists above the series of discrete energy level
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f99385b4e29df3167ddc0e5fcb090a1a
https://doi.org/10.1051/jcp/1980770837
https://doi.org/10.1051/jcp/1980770837
Publikováno v:
Geologische Rundschau. 71:1-21
The recent discovery that atomic carbon occurs plentiful in olivines from mantle-derived rocks opens new aspects for the chemical evolution of the early atmosphere and the origin of life. It has been shown conclusively that atomic carbon which is dis
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4fcbda8bac4c4f61462f7e67eea50b83
https://doi.org/10.1007/bf01825021
https://doi.org/10.1007/bf01825021
Publikováno v:
Journal of Physics and Chemistry of Solids. 43:59-71
Using the 12 C d , p ) 13 C method and ultrahigh vacuum techniques it is shown that MgO single crystals, grown by arc fusion, invariably contain high concentrations of carbon, 250–2500 at.-ppm. The carbon sets up steep concentration gradients in th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d4584257951a4b5f5f416a9e8ba51c3b
https://doi.org/10.1016/0022-3697(82)90174-3
https://doi.org/10.1016/0022-3697(82)90174-3
Publikováno v:
Nuclear Instruments and Methods in Physics Research. 197:27-36
Using the 12 C(d, p) 13 C method and an ultrahigh vacuum chamber for in situ heat treatments up to 1170 K and down to liquid nitrogen temperature, carbon was analyzed in a variety of synthetic MgO single crystals and of natural olivine single crystal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8880c148631336a44cb70130c5a0f839
https://doi.org/10.1016/0167-5087(82)90113-2
https://doi.org/10.1016/0167-5087(82)90113-2
Autor:
H. Wengeler, F. Freund
Publikováno v:
Berichte der Bunsengesellschaft für physikalische Chemie. 84:866-873
Proton conductivity is an outstanding feature of Al(OH)3, Mg(OH)2, and Ca(OH)2 powders between room temperature and their respective dehydration temperatures. It can be measured by using Pd-black electrodes in H2 either by d.c. conductivity measureme
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::97178ff21d9c51223b08e736e5048890
https://doi.org/10.1002/bbpc.19800840908
https://doi.org/10.1002/bbpc.19800840908
Autor:
H. Wengeler, F. Freund
Publikováno v:
Materials Research Bulletin. 15:1241-1245
High purity and industrial purity grade MgO single crystals from arc-fusion melts show temperature- and time-dependent anomalies in the thermal expansion behavior at about 520 K and 720 K, systematic changes in the linear thermal expansion coefficien
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::706726e2c9437da06dc85c0159fba5bb
https://doi.org/10.1016/0025-5408(80)90026-4
https://doi.org/10.1016/0025-5408(80)90026-4
Publikováno v:
Geochimica et Cosmochimica Acta. 44:1319-1333
Carbon is an incompatible element in oxide and silicate lattices. Until now it has been believed to exist only in the form of CO 2− 3 ions, molecularily dissolved CO 2 or graphitic inclusions. Recently it has been shown that carbon can dissolve in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1a1fe7c97c29ce18808a6fea6da762f1
https://doi.org/10.1016/0016-7037(80)90092-7
https://doi.org/10.1016/0016-7037(80)90092-7
Publikováno v:
Materials Research Bulletin. 15:1011-1018
Using the 12 C(d,p) 13 C method and an ultrahigh vacuum chamber for in situ heat treatments up to 1170 K and down to liquid nitrogen temperature, the carbon content was measured of a variety of arc-fusion grown MgO single crystals of rated purity gra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::260a979e762d9627ed5e0c9bb45afc44
https://doi.org/10.1016/0025-5408(80)90227-5
https://doi.org/10.1016/0025-5408(80)90227-5
Publikováno v:
Geochimica et Cosmochimica Acta. 46:1821-1829
Water dissolved in a nominally anhydrous oxide like MgO forms not only OH− ions, as is usually assumed, but also molecular H2 and peroxy anions O22−. The specific lattice site where this reaction occurs has been identified for the model-type MgO
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f7fcb100c639be058d526efb88bd8c82
https://doi.org/10.1016/0016-7037(82)90121-1
https://doi.org/10.1016/0016-7037(82)90121-1
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 1:223-234
Pre-irradiation defects in insulators may be activated or decorated through the effects of ionizing radiation. In order to understand these reactions it is important to have a detailed understanding of the nature of the defects which existed prior to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::84756d8d3d12eed688bc825a024b0c93
https://doi.org/10.1016/0168-583x(84)90073-9
https://doi.org/10.1016/0168-583x(84)90073-9