The Experts below are selected from a list of 243 Experts worldwide ranked by ideXlab platform
Mogens Bjerg Mogensen - One of the best experts on this subject based on the ideXlab platform.
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studying the o2 metal o2 solid electrolyte electrode system with use of model electrodes the exchange current density determination
Russian Journal of Electrochemistry, 2003Co-Authors: S. N. Shkerin, S Gormsen, S. Primdahl, Mogens Bjerg MogensenAbstract:Cells with model gold and platinum electrodes are studied by an impedance spectroscopy method. Distinguishing features of these electrodes are a large characteristic size of the metal/electrolyte contact (up to 100 μm) and such well definable geometrical parameters as the length of triple-phase boundary (TPB) and the contact area. E. Shouler discovered that the electrolyte resistance, measured in an electrochemical cell, varies with the oxygen activity. Modern view is that this is connected with the TPB expansion. The expansion parameters determined here depend on the electrolyte Prehistory and reach a few tens of micrometers. Specific (referred to a unit TPB length) values of polarization conductivities of both electrodes are obtained. Depending on the electrode Prehistory, they amount to (2–6.5) × 10–4 and (3–22)× 10–4 S cm–1 for Pt and Au, respectively, at 977°C in an oxygen atmosphere. The polarization conductivity, calculated per unit active area of electrolyte, is independent of the Pt electrode Prehistory. Calculated exchange current densities are compared with radioisotope assay results.
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Studying the O2, Metal/O2– (Solid Electrolyte) Electrode System with Use of Model Electrodes: The Exchange Current Density Determination
Russian Journal of Electrochemistry, 2003Co-Authors: S. N. Shkerin, S Gormsen, S. Primdahl, Mogens Bjerg MogensenAbstract:Cells with model gold and platinum electrodes are studied by an impedance spectroscopy method. Distinguishing features of these electrodes are a large characteristic size of the metal/electrolyte contact (up to 100 μm) and such well definable geometrical parameters as the length of triple-phase boundary (TPB) and the contact area. E. Shouler discovered that the electrolyte resistance, measured in an electrochemical cell, varies with the oxygen activity. Modern view is that this is connected with the TPB expansion. The expansion parameters determined here depend on the electrolyte Prehistory and reach a few tens of micrometers. Specific (referred to a unit TPB length) values of polarization conductivities of both electrodes are obtained. Depending on the electrode Prehistory, they amount to (2–6.5) × 10–4 and (3–22)× 10–4 S cm–1 for Pt and Au, respectively, at 977°C in an oxygen atmosphere. The polarization conductivity, calculated per unit active area of electrolyte, is independent of the Pt electrode Prehistory. Calculated exchange current densities are compared with radioisotope assay results.
S. N. Shkerin - One of the best experts on this subject based on the ideXlab platform.
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studying the o2 metal o2 solid electrolyte electrode system with use of model electrodes the exchange current density determination
Russian Journal of Electrochemistry, 2003Co-Authors: S. N. Shkerin, S Gormsen, S. Primdahl, Mogens Bjerg MogensenAbstract:Cells with model gold and platinum electrodes are studied by an impedance spectroscopy method. Distinguishing features of these electrodes are a large characteristic size of the metal/electrolyte contact (up to 100 μm) and such well definable geometrical parameters as the length of triple-phase boundary (TPB) and the contact area. E. Shouler discovered that the electrolyte resistance, measured in an electrochemical cell, varies with the oxygen activity. Modern view is that this is connected with the TPB expansion. The expansion parameters determined here depend on the electrolyte Prehistory and reach a few tens of micrometers. Specific (referred to a unit TPB length) values of polarization conductivities of both electrodes are obtained. Depending on the electrode Prehistory, they amount to (2–6.5) × 10–4 and (3–22)× 10–4 S cm–1 for Pt and Au, respectively, at 977°C in an oxygen atmosphere. The polarization conductivity, calculated per unit active area of electrolyte, is independent of the Pt electrode Prehistory. Calculated exchange current densities are compared with radioisotope assay results.
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Studying the O2, Metal/O2– (Solid Electrolyte) Electrode System with Use of Model Electrodes: The Exchange Current Density Determination
Russian Journal of Electrochemistry, 2003Co-Authors: S. N. Shkerin, S Gormsen, S. Primdahl, Mogens Bjerg MogensenAbstract:Cells with model gold and platinum electrodes are studied by an impedance spectroscopy method. Distinguishing features of these electrodes are a large characteristic size of the metal/electrolyte contact (up to 100 μm) and such well definable geometrical parameters as the length of triple-phase boundary (TPB) and the contact area. E. Shouler discovered that the electrolyte resistance, measured in an electrochemical cell, varies with the oxygen activity. Modern view is that this is connected with the TPB expansion. The expansion parameters determined here depend on the electrolyte Prehistory and reach a few tens of micrometers. Specific (referred to a unit TPB length) values of polarization conductivities of both electrodes are obtained. Depending on the electrode Prehistory, they amount to (2–6.5) × 10–4 and (3–22)× 10–4 S cm–1 for Pt and Au, respectively, at 977°C in an oxygen atmosphere. The polarization conductivity, calculated per unit active area of electrolyte, is independent of the Pt electrode Prehistory. Calculated exchange current densities are compared with radioisotope assay results.
Matthew Spriggs - One of the best experts on this subject based on the ideXlab platform.
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political economy in Prehistory a marxist approach to pacific sequences
Current Anthropology, 2015Co-Authors: Timothy Earle, Matthew SpriggsAbstract:Development of strong leaders and social stratification in Prehistory is suitable for a political economy approach to the longue duree. Our goal is to encourage archaeologists to formulate prehistoric research that draws on historical materialism, the Marxist reasoning for understanding political economy. Three prehistoric cases from the Pacific (Lapita, Vanuatu, and Hawai�i) help us evaluate the steps required to do this. Most importantly, we identify economic bottlenecks (constriction points) based on property rights for land or on production and trade of prestige goods. Resources can be mobilized by emergent elites at such bottlenecks to support strategies that enmesh land managers, captains, warriors, and priests to centralize power. A political economy approach in Prehistory can help explain striking parallels observed for independent sequences as well as conjunctures and divergences in specific world culture areas.
S Gormsen - One of the best experts on this subject based on the ideXlab platform.
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studying the o2 metal o2 solid electrolyte electrode system with use of model electrodes the exchange current density determination
Russian Journal of Electrochemistry, 2003Co-Authors: S. N. Shkerin, S Gormsen, S. Primdahl, Mogens Bjerg MogensenAbstract:Cells with model gold and platinum electrodes are studied by an impedance spectroscopy method. Distinguishing features of these electrodes are a large characteristic size of the metal/electrolyte contact (up to 100 μm) and such well definable geometrical parameters as the length of triple-phase boundary (TPB) and the contact area. E. Shouler discovered that the electrolyte resistance, measured in an electrochemical cell, varies with the oxygen activity. Modern view is that this is connected with the TPB expansion. The expansion parameters determined here depend on the electrolyte Prehistory and reach a few tens of micrometers. Specific (referred to a unit TPB length) values of polarization conductivities of both electrodes are obtained. Depending on the electrode Prehistory, they amount to (2–6.5) × 10–4 and (3–22)× 10–4 S cm–1 for Pt and Au, respectively, at 977°C in an oxygen atmosphere. The polarization conductivity, calculated per unit active area of electrolyte, is independent of the Pt electrode Prehistory. Calculated exchange current densities are compared with radioisotope assay results.
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Studying the O2, Metal/O2– (Solid Electrolyte) Electrode System with Use of Model Electrodes: The Exchange Current Density Determination
Russian Journal of Electrochemistry, 2003Co-Authors: S. N. Shkerin, S Gormsen, S. Primdahl, Mogens Bjerg MogensenAbstract:Cells with model gold and platinum electrodes are studied by an impedance spectroscopy method. Distinguishing features of these electrodes are a large characteristic size of the metal/electrolyte contact (up to 100 μm) and such well definable geometrical parameters as the length of triple-phase boundary (TPB) and the contact area. E. Shouler discovered that the electrolyte resistance, measured in an electrochemical cell, varies with the oxygen activity. Modern view is that this is connected with the TPB expansion. The expansion parameters determined here depend on the electrolyte Prehistory and reach a few tens of micrometers. Specific (referred to a unit TPB length) values of polarization conductivities of both electrodes are obtained. Depending on the electrode Prehistory, they amount to (2–6.5) × 10–4 and (3–22)× 10–4 S cm–1 for Pt and Au, respectively, at 977°C in an oxygen atmosphere. The polarization conductivity, calculated per unit active area of electrolyte, is independent of the Pt electrode Prehistory. Calculated exchange current densities are compared with radioisotope assay results.
S. Primdahl - One of the best experts on this subject based on the ideXlab platform.
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studying the o2 metal o2 solid electrolyte electrode system with use of model electrodes the exchange current density determination
Russian Journal of Electrochemistry, 2003Co-Authors: S. N. Shkerin, S Gormsen, S. Primdahl, Mogens Bjerg MogensenAbstract:Cells with model gold and platinum electrodes are studied by an impedance spectroscopy method. Distinguishing features of these electrodes are a large characteristic size of the metal/electrolyte contact (up to 100 μm) and such well definable geometrical parameters as the length of triple-phase boundary (TPB) and the contact area. E. Shouler discovered that the electrolyte resistance, measured in an electrochemical cell, varies with the oxygen activity. Modern view is that this is connected with the TPB expansion. The expansion parameters determined here depend on the electrolyte Prehistory and reach a few tens of micrometers. Specific (referred to a unit TPB length) values of polarization conductivities of both electrodes are obtained. Depending on the electrode Prehistory, they amount to (2–6.5) × 10–4 and (3–22)× 10–4 S cm–1 for Pt and Au, respectively, at 977°C in an oxygen atmosphere. The polarization conductivity, calculated per unit active area of electrolyte, is independent of the Pt electrode Prehistory. Calculated exchange current densities are compared with radioisotope assay results.
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Studying the O2, Metal/O2– (Solid Electrolyte) Electrode System with Use of Model Electrodes: The Exchange Current Density Determination
Russian Journal of Electrochemistry, 2003Co-Authors: S. N. Shkerin, S Gormsen, S. Primdahl, Mogens Bjerg MogensenAbstract:Cells with model gold and platinum electrodes are studied by an impedance spectroscopy method. Distinguishing features of these electrodes are a large characteristic size of the metal/electrolyte contact (up to 100 μm) and such well definable geometrical parameters as the length of triple-phase boundary (TPB) and the contact area. E. Shouler discovered that the electrolyte resistance, measured in an electrochemical cell, varies with the oxygen activity. Modern view is that this is connected with the TPB expansion. The expansion parameters determined here depend on the electrolyte Prehistory and reach a few tens of micrometers. Specific (referred to a unit TPB length) values of polarization conductivities of both electrodes are obtained. Depending on the electrode Prehistory, they amount to (2–6.5) × 10–4 and (3–22)× 10–4 S cm–1 for Pt and Au, respectively, at 977°C in an oxygen atmosphere. The polarization conductivity, calculated per unit active area of electrolyte, is independent of the Pt electrode Prehistory. Calculated exchange current densities are compared with radioisotope assay results.
