2012
DOI: 10.1111/j.1551-2916.2012.05101.x
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Abstract: LaNbO4/La3NbO7 and LaNbO4/LaNb3O9 cer‐cer composites were prepared by impregnating Ca‐doped LaNbO4 powder, synthesized by spray pyrolysis, with La‐ or Nb‐precursor solutions. The sintering of the calcined powders was investigated by dilatometry, and dense composites were prepared by conventional sintering, hot pressing, and spark plasma sintering. The particle size of the starting powders was about 50 nm, and the average grain size of the dense materials ranged from 100 nm and upwards, depending on the sinteri… Show more

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Cited by 12 publications
(4 citation statements)
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“…At the time, it was considered somewhat of a breakthrough, as LaNbO 4 represented a new oxide system posing as an alternative electrolyte material to the traditional Y-doped BaZrO 3 or BaCeO 3 perovskites. Following that paper, significant attempts went into optimizing the performance of the oxide by investigating alternative doping strategies [63,64,200,201,205,[211][212][213][214], as well as different synthesis routes and conditions [202,[215][216][217][218][219]. However, most of this work ultimately resulted in minimal improvements compared to the original work by Haugsrud and Norby.…”
Section: Abo 4 Oxidesmentioning
confidence: 99%
“…At the time, it was considered somewhat of a breakthrough, as LaNbO 4 represented a new oxide system posing as an alternative electrolyte material to the traditional Y-doped BaZrO 3 or BaCeO 3 perovskites. Following that paper, significant attempts went into optimizing the performance of the oxide by investigating alternative doping strategies [63,64,200,201,205,[211][212][213][214], as well as different synthesis routes and conditions [202,[215][216][217][218][219]. However, most of this work ultimately resulted in minimal improvements compared to the original work by Haugsrud and Norby.…”
Section: Abo 4 Oxidesmentioning
confidence: 99%
“…LaNbO 4 is also a 'line' compound and offset from the nominal 1:1 ratio of La:Nb leads to the formation of secondary phases of either La 3 NbO 7 or LaNb 3 O 9 [10]. As these two phases have significantly different melting points, segregation of even a small amount of one of these phases will influence on the sintering and grain growth of LaNbO 4 [10].…”
Section: Spray-pyrolysed Powdersmentioning
confidence: 96%
“…LaNbO 4 is also a 'line' compound and offset from the nominal 1:1 ratio of La:Nb leads to the formation of secondary phases of either La 3 NbO 7 or LaNb 3 O 9 [10]. As these two phases have significantly different melting points, segregation of even a small amount of one of these phases will influence on the sintering and grain growth of LaNbO 4 [10]. Moreover, the large number of binary and ternary oxide compounds reported in the ternary phase diagrams AO-La 2 O 3 -Nb 2 O 5 (A = Ca, Sr) [9,11] gives rise to significant challenges for controlling the stoichiometry to avoid formation of secondary phases.…”
Section: Spray-pyrolysed Powdersmentioning
confidence: 99%
“…Acceptor-doping on the Nb site or co-doping on both sites decreases the conductivity hydrogen versus inverse temperature materials with various dopants (1% Ca [3], 0.5% Sr [20], 1% Ti [19], nominally undoped LaNbO 4 [17], and SPS prepared Ca-doped LaNbO 4 [51] The cathode was a 50% LNO-50% LSM. Fuel gas: wet 5% H 2 /Ar.…”
Section: Summarising Conclusionmentioning
confidence: 99%