منابع مشابه
Oxygen - ion and electron conductivity in Sr 2 ( Fe 1 x Ga x ) 2 O 5
High-temperature electrical conductivity measurements, structural data from powder X-ray diffraction and Fe Mössbauer spectroscopy were combined to study the interrelationship of oxygen ion transport and pand n-type transport in Sr2(Fe1 xGax)2O5, where x 1⁄4 0, 0.1 and 0.2. Although gallium substitution generally decreases the total ion-electron transport, the transition of the orthorhombic bro...
متن کاملTuning Sodium Ion Conductivity in the Layered Honeycomb Oxide Na(3-x)Sn(2-x)Sb(x)NaO6.
A series of compounds with the composition Na(3-x)Sn(2-x)Sb(x)NaO6 (x = 0.0, 0.2, 0.4, 0.6, 0.7, 0.8, 0.9, and 1.0) has been prepared by solid-state reaction and characterized by powder X-ray diffraction, neutron diffraction (for x = 0.0), and impedance spectroscopy. The compounds have a layered structure derived from that of α-NaFeO2, with alternating Na3 planes and NaSn2O6 slabs with honeycom...
متن کاملLa factorisation de x pl − x ∈ Fp[x] selon la trace
Résumé: Nous décrivons quelques factorisations de polynômes sur des corps finis. Ces factorisation sont liées à la trace, aux compositions de polynômes et aux coefficients binomiaux. Comme conséquence nous obtenons la description des polynômes irréductibles Q ∈ F2[x] tels que les polynômes Q(1 + x+ x2) (ou Q(x+ x2)) sont également irréductibles. Abstract: We present a few factorizations of poly...
متن کاملNature of conductivity in SrSiO3-based fast ion conductors.
In this paper we report the preparation and characterization of Sr1-xNaxSiO3-0.5x samples, recently proposed as oxide ion conductors. We show that Na-doping unlikely takes place in the silicate phase, and that a secondary glassy phase is at the origin of the transport properties, thereby suggesting that the conductivity is due only to a limited extent to oxide ion migration in the crystalline s...
متن کاملSelf-organized enhancement of conductivity in biological ion channels
We discuss an example of self-organization in a biological system. It arises from long-range ion–ion interactions, and it leads us to propose a new kind of enhanced conduction in ion channels. The underlying mechanism involves charge fluctuations near the channel mouth, amplified by the mismatch between the relative permittivities of water and the protein of the channel walls. We use Brownian d...
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ژورنال
عنوان ژورنال: ECS Proceedings Volumes
سال: 1999
ISSN: 0161-6374,2576-1579
DOI: 10.1149/199919.0327pv