Composition, structure and transport properties of perovskite-type oxides

Mixed conducting ceramic hollow‐fiber membranes for air separation

“…[1][2][3][4][5] Dense membranes prepared from these ceramic materials show good oxygen permeation at elevated temperatures without the need of external electrical loadings. Furthermore, because no species other than oxygen can be transferred through the membrane, the oxygen permselectivity is theoretically infinite.…”

“…[8][9][10] In addition, the membrane configuration such as flat sheet, tubular, or hollow fiber also plays an important role in the overall ceramic membrane systems for air separation. In most previous studies, disc-shaped membranes with only a limited membrane area (Ͻ5 cm 2 ) were usually used because they are easily fabricated using conventional static-pressing methods. Although a multiple planar stack can be adopted to enlarge the membrane area to a plant scale, many problems such as hightemperature sealing, connection, and pressure resistance have to be faced.…”

Magnetic study of interatomic interactions, synthesis, structural and mass spectroscopy investigations of lanthanum gallate doped with cobalt and magnesium

“…Moreover, the concentration and nature of the dopants drastically affect the conductivity. Nickel and cobalt containing systems are considered to be the best conductors and chromium and manganese containing systemsthe worst [2,[6][7][8][9][10][11][12][13][14][15][16][17][18]. The reasons of the influence of the dopants, as a rule, are not discussed.…”

State of Chromium Atoms, Clustering, and Interatomic Interactions in Doped Lanthanum Gallate La(Sr)Ga(Cr,Mg)O3-δ

“…In the studies of conductivity much attention is being given to lanthanum gallates doped aside from strontium and magnesium with transition elements [4,27,34,35,[42][43][44][45][46][47][48][49][50][51][52][53][54]. In this case we deal with electron-ionic conductors, which are interesting not only from applied point of view, but also from the point of view of fundamental studies.…”