scholarly journals Lanthanum manganite perovskite ceramic powders for CO2 splitting: Influence of Pechini synthesis parameters on sinterability and reactivity

2019 ◽  
Vol 45 (12) ◽  
pp. 15636-15648 ◽  
Author(s):  
Julien Jouannaux ◽  
Anita Haeussler ◽  
Martin Drobek ◽  
André Ayral ◽  
Stéphane Abanades ◽  
...  
Keyword(s):  
Lanthanum Manganite ◽  
Ceramic Powders ◽  
Synthesis Parameters ◽  
Manganite Perovskite ◽  
Pechini Synthesis ◽  
Perovskite Ceramic

Development of Zirconia Electrolyte Films on Porous Doped Lanthanum Manganite Cathodes by Electrophoretic Deposition

1999 ◽  
Vol 575 ◽  
Author(s):  
R. N. Basu ◽  
C. A. Randall ◽  
M. J. Mayo
Keyword(s):  
Solid Oxide Fuel Cells ◽  
Electrophoretic Deposition ◽  
Yttria Stabilized Zirconia ◽  
Lanthanum Manganite ◽  
Ceramic Powders ◽  
Stabilized Zirconia ◽  
Uniform Coating ◽  
Cathode Tube ◽  
Zirconia Film ◽  
Zirconia Electrolyte

ABSTRACTElectrophoretic deposition (EPD) was explored as an inexpensive route for fabricating the 8mol% yttria stabilized zirconia electrolyte in solid oxide fuel cells (SOFCs). Normally, deposition of particulate ceramic powders onto a sintered porous surface yields a non uniform coating which, after sintering, results in porosity, surface roughness and cracking in the coating. To overcome this problem, the present study used a fugitive graphite interlayer between the porous air electrode supported (AES) cathode tube (doped-LaMnO3) and the deposited zirconia film. By this approach, a fairly dense green coating (˜ 60%) was obtained, which yielded a smooth surface and pore-free microstructure after sintering. Preliminary results on the effect of a fugitive interlayer on the unfired (green) and fired zirconia coatings are discussed.

High Performance Au–Pd Supported on 3D Hybrid Strontium-Substituted Lanthanum Manganite Perovskite Catalyst for Methane Combustion

ACS Catalysis ◽  
2016 ◽  
Vol 6 (10) ◽  
pp. 6935-6947 ◽  
Author(s):  
Yuan Wang ◽  
Hamidreza Arandiyan ◽  
Jason Scott ◽  
Mandana Akia ◽  
Hongxing Dai ◽  
...  
Keyword(s):  
High Performance ◽  
Methane Combustion ◽  
Lanthanum Manganite ◽  
Perovskite Catalyst ◽  
Manganite Perovskite

Effects of excess manganese in lanthanum manganite perovskite on lowering oxidation light-off temperature for automotive exhaust gas pollutants

2011 ◽  
Vol 169 (1-3) ◽  
pp. 282-289 ◽  
Author(s):  
Parvaneh Esmaeilnejad-Ahranjani ◽  
Abbasali Khodadadi ◽  
Hessam Ziaei-Azad ◽  
Yadollah Mortazavi
Keyword(s):  
Lanthanum Manganite ◽  
Exhaust Gas ◽  
Automotive Exhaust ◽  
Manganite Perovskite

Thin film deposition of lanthanum manganite perovskite by the ALE process

1999 ◽  
Vol 9 (8) ◽  
pp. 1781-1784 ◽  
Author(s):  
Ola Nilsen ◽  
Marko Peussa ◽  
Helmer Fjellvåg ◽  
Lauri Niinistö ◽  
Arne Kjekshus
Keyword(s):  
Thin Film ◽  
Thin Film Deposition ◽  
Film Deposition ◽  
Lanthanum Manganite ◽  
Manganite Perovskite

scholarly journals Synthesis and Evaluation of ABO3 Perovskites (A=La and B=Mn, Co) with Stoichiometric and Over-stoichiometric Ratios of B/A for Catalytic Oxidation of Trichloroethylene

2018 ◽  
Vol 13 (1) ◽  
pp. 47 ◽  
Author(s):  
Razieh Alagheband ◽  
Sarah Maghsoodi ◽  
Amirhossein Shahbazi Kootenaei ◽  
Hassan Kianmanesh
Keyword(s):  
Catalytic Oxidation ◽  
Fixed Bed ◽  
Combustion Method ◽  
Catalytic Performance ◽  
Lanthanum Manganite ◽  
Fixed Bed Reactor ◽  
Bet Surface Area ◽  
Manganite Perovskite ◽  
Different Temperatures ◽  
Stoichiometric Ratios

In this contribution, perovskite catalysts (ABO3) were probed that site A and site B were occupied by lanthanum and transition metals of manganese or cobalt, respectively, with stoichiometric ratios as well as 20 % over-stoichiometric ratios of B/A. The perovskite samples were synthesized using a gel-combustion method and characterized by BET, XRD, SEM and O2-TPD analyses. After mounting in a fixed bed reactor, the catalysts were examined in atmospheric pressure conditions at different temperatures for oxidation of 1000 ppm trichloroethylene in the air. Evaluation of over-stoichiometric catalysts activity showed that the increased ratio of B/A in the catalysts compared to the stoichiometric one led to BET surface area, oxygen mobility, and consequently catalytic performance improvement. The lanthanum manganite perovskite with 20 % excess manganese yielded the best catalytic performance among the probed perovskites. Copyright © 2018 BCREC Group. All rights reservedReceived: 28th April 2017; Revised: 31st July 2017; Accepted: 4th August 2017; Available online: 22nd January 2018; Published regularly: 2nd April 2018How to Cite: Alagheband, R., Maghsoodi, S., Kootenaei, A.S., Kianmanesh, H. (2018). Synthesis and Evaluation of ABO3 Perovskites (A=La and B=Mn, Co) with Stoichiometric and Over-stoichiometric Ratios of B/A for Catalytic Oxidation of Trichloroethylene. Bulletin of Chemical Reaction Engineering & Catalysis, 13 (1): 47-56 (doi:10.9767/bcrec.13.1.1188.47-56) 

Thermal Analysis and Magnetic Properties of Lanthanum Barium Manganite Perovskite

2014 ◽  
Vol 896 ◽  
pp. 381-384 ◽  
Author(s):  
Priyo Sardjono ◽  
Wisnu Ari Adi
Keyword(s):  
Thermal Analysis ◽  
Magnetic Properties ◽  
Phase Transformation ◽  
Double Exchange ◽  
Raw Material ◽  
Lanthanum Manganite ◽  
Magnetic Interactions ◽  
Exchange Mechanism ◽  
Ferromagnetic Behavior ◽  
Manganite Perovskite

The lanthanum manganite is the family of magnetic materials which had the magnetic properties are varied depend on the composition. This study has been carried out synthesis and characterization of thermal and magnetic properties of the lanthanum barium manganite perovskite. The perovskite material is prepared by oxides, namely La2O3, BaCO3, and MnCO3. The mixture was milled for 10h and then sintered at temperature of 1000 °C for 10h. Thermal analysis and magnetic properties are measured by differential thermal analysis (TG-DTA) and vibrating sample magnetometer (VSM), respectively. Decomposition phase of MnCO3become MnO occurred at temperatures around 390 °C with releasing in CO2. Since lanthanum manganite has a stable ion configuration, magnetic properties of these systems are built from MnO phase transformation become α-Mn2O3is arrayed anti-ferromagnetic due to the presence of lanthanum in the system. And this anti-ferromagnetic behavior occurred due to magnetic interactions between Mn3+adjacent ions through super-exchange mechanism. While lanthanum barium manganite had a less stable ion configuration, therefore magnetic properties of these systems are built from phase transformation MnO become α-Mn3O4is arrayed ferromagnetic due to the presence of lanthanum and barium in this system. The presence of lanthanum and barium trigger in the emergence of mixed-valence Mn ions, so that occur to magnetic interaction between Mn3+and Mn4+through the double-exchange mechanism. We concluded that the characteristic of magnetic properties on the lanthanum barium manganite system perovskite is affected by thermal properties, fundamental properties of raw material and the result of reaction is formed.

The effects of excess manganese in nano-size lanthanum manganite perovskite on enhancement of trichloroethylene oxidation activity

2013 ◽  
Vol 215-216 ◽  
pp. 827-837 ◽  
Author(s):  
Sarah Maghsoodi ◽  
Jafar Towfighi ◽  
Abbasali Khodadadi ◽  
Yadollah Mortazavi
Keyword(s):  
Lanthanum Manganite ◽  
Oxidation Activity ◽  
Manganite Perovskite ◽  
Nano Size
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