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CO preferential oxidation (CO-PROx) on La(1-x)Ce(x)NiO(3) perovskites
(ELSEVIER SCIENCE BV, 2011)
La(1-x)Ce(x)NiO(3) perovskites have been prepared, characterized by XRD. TPR and surface area and tested as catalysts for CO-PROx, with a feed of 2.5% CO, 5% O(2), 33% H(2) and N(2) to 100%. The samples exhibited an XRD ...
Study of La2-xCaxCuO4 perovskites for the low temperature water gas shift reaction
(ELSEVIER SCIENCE BVAMSTERDAM, 2012-01-31)
The effects of small fractions of calcium (x = 0, 0.05, 0.1, 0.15, and 0.20) on the structure and the catalytic properties of La2-xCaxCuO4 peroviskites have been investigated. The samples have been synthesized using the ...
Nature of potential barrier in (Ca-1/4,Cu-3/4)TiO3 polycrystalline perovskite
(Elsevier B.V., 2006-01-01)
The nonohmic electrical features of (Ca-1/4,Cu-3/4)TiO3 perovskite ceramics, which have very strong gigantic dielectric is believed originate from potential barriers at the grain boundaries. In the present study, we used ...
Mechanochemical synthesis of ceramic powders with perovskite structure
(Elsevier B.V., 2003-12-20)
The mechanical activation is one of the most effective method for obtaining highly disperse system due to mechanical action stress fields form in solids during milling procedure. This effect results in changes of free ...
Nb2O5 hole blocking layer for hysteresis-free perovskite solar cells
(2016-10-15)
Perovskite solar cells have attracted attention due its high conversion efficiency and low cost. In this work, Nb2O5 is used as an alternative compact hole blocking layer in conjunction with mesoporous TiO2 and CH3NH3PbI3 ...
Influence of synthesis and processing parameters of the columbite precursor on the amount of Perovskite PMN
(ABM, ABC, ABPol, 1999-10)
Columbite route for synthesis of P3MgNb2O9 (PMN) allows the suppression of secondary phases in PMN powders. These phases, having low dielectric constant, affect negatively the dielectric properties of PMN ceramics. Aiming ...
Nanoparticle synthesis of La1-xSrxMnO3 (0.1, 0.2 and 0.3) perovskites
(Institute of Electrical and Electronics Engineers (IEEE), 2002-09-01)
Synthesis of La1-xSrxMnO3 (x = 0.1, 0.2 and 0.3) by homogenous coprecipitation method using urea as precipitant agent Is reported. The particles are smaller than 200 nm after heating at 950 degreesC. Temperature dependence ...
Lanthanum cobaltite black pigments with perovskite structure
(2013-05-09)
In this work La1-xCaxCoO3 (x = 0-0.4) pigments were synthesized by the polymeric precursor method with heat treatments at 700, 800 and 900 C for 4 h. The powders were characterized by colorimetry, UV-vis spectroscopy and ...
Quantum chemical modeling of perovskite: An investigation of piezoelectricity in ferrite of yttrium
(Springer, 2011-07-01)
In a previous article, we used Hartree-Fock (HF) theory to study the piezoelectricity in BaTiO(3). In this paper, we applied the Douglas-Kroll-Hess second order scalar relativistic method to investigate the possible ...
Exploring the properties of niobium oxide films for electron transport layers in perovskite solar cells
(2019-01-01)
In this work, niobium oxide films were deposited by reactive magnetron sputtering under different oxygen flow rate and applied as electron transport layer in perovskite solar cells. It was found that the deposition made ...