Numerical analysis of space charge layers and electrical conductivity in mesoscopic cerium oxide crystals

2004 ◽  
Vol 95 (3) ◽  
pp. 1203-1210 ◽  
Author(s):  
Andreas Tschöpe ◽  
Christof Bäuerle ◽  
Rainer Birringer
Keyword(s):  
Electrical Conductivity ◽  
Numerical Analysis ◽  
Space Charge ◽  
Cerium Oxide ◽  
Oxide Crystals

Space Charge Layers in Polycrystalline Cerium Oxide

2002 ◽  
Vol 756 ◽  
Author(s):  
Andreas Tschöpe
Keyword(s):  
Electrical Conductivity ◽  
Space Charge ◽  
Cerium Oxide ◽  
Oxygen Deficiency ◽  
Electronic Conductivity ◽  
Electrical Potential ◽  
Theoretical Models ◽  
Excess Charge ◽  
Two Phase ◽  
Space Charge Model

ABSTRACTThe effect of space charge layers in polycrystalline cerium oxide was analyzed by comparing experimental results of grain size-dependent electrical conductivity with theoretical models. Modeling included the calculation of space charge segregation of acceptor ions and of the effective electrical conductivity of polycrystalline cerium oxide in both the macroscopic and mesoscopic range of grain sizes. It is shown that an L-3 power law for the electronic conductivity in the nm-regime is characteristic for the equilibrium space charge model and different from the scaling behavior of alternative models. The origin of space charge potential was investigated by numerical calculation of the electrical potential in a two-phase model. It was found, that a positive excess charge at grain boundaries of cerium oxide is caused by an enhanced oxygen deficiency at the grain boundary core. The influence of acceptor ion doping in the dilute limit and of non-equilibrium distribution of acceptor ions on electrical conductivity was also studied.

scholarly journals Numerical analysis of a mechanism of electrical conductivity of substance in the middle and lower mantle

1999 ◽  
Vol 51 (10) ◽  
pp. 1067-1071 ◽  
Author(s):  
L. N. Porokhova ◽  
D. Yu. Abramova ◽  
D. A. Porokhov
Keyword(s):  
Electrical Conductivity ◽  
Numerical Analysis ◽  
Lower Mantle

scholarly journals Numerical Analysis of Thermal Stress in Semi-Transparent Oxide Crystals Grown by Czochralski and EFG Methods

2018 ◽  
Vol 54 (1) ◽  
pp. 1800219
Author(s):  
Carmen Stelian ◽  
Jessica Muzy ◽  
Serge Labor ◽  
Marc Fivel ◽  
Hugues Cabane ◽  
...  
Keyword(s):  
Thermal Stress ◽  
Numerical Analysis ◽  
Transparent Oxide ◽  
Oxide Crystals

The effect of space charge on electrical conductivity of the structures Al-Si3N4-Al

1973 ◽  
Vol 16 (9) ◽  
pp. 1328-1329
Author(s):  
A. V. Baranov ◽  
L. A. Troyan
Keyword(s):  
Electrical Conductivity ◽  
Space Charge
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