Propane gas sensing with high-density SrTi0.6Fe0.4O(3−δ) ceramics evaluated by thermogravimetric analysis

Insight into the Effects of Fe Addition on the Local Structure and Electronic Properties of SrTiO3

“…21−29 In STFO, replacing Ti 4+ by iron as Fe 3+ creates negatively charged defects (Fe Ti ′ ), 24,27,29−31 which are compensated by the formation of oxygen vacancies, leading to an increase in ionic conductivity. 32,33 In the case of transition metal oxides, oxygen vacancies are generally electron donors, and in STO, oxygen vacancies are particularly important because they have a tendency to retain high carrier mobilities, even at elevated carrier densities. 34 The requirement for easy integration of this material into electronic devices makes the synthesis of high-quality STFO nanostructures interesting from both applied and fundamental standpoints.…”

Síntese e Caracterização do Composto SrTi1-xFexO3 Nanoestruturado

“…Por estas razões, os compostos cristalinos e amorfos de estrutura perovskita têm sido extensivamente estudados nas últimas décadas e em especial, os zirconatos AZrO 3 e titanatos 30,32,34 . A preparação das amostras na forma de filmes tem sido realizada principalmente por dois processos "screen printing" [35][36][37] onde uma pasta produzida com o pó cristalino é depositada sobre um substrato, e deposição a laser pulsado (PLD -"pulsed laser deposition") 31,38,39 , sendo o alvo PLD obtido via reação de estado sólido.…”

Development of stable oxygen transport membranes

“…Due to its higher chelating power, a far more extensive range of cations can be chelated with EDTA compared to CA [22]. Possessing three carboxyl groups and one hydroxyl group, however, CA is the chelating agent with the stronger gelation ability [23]. The sole use of CA as chelating agent, however, may result in a highly exothermic, non-uniform combustion reaction, adversely affecting the morphology of the powder [24].…”

“…The sole use of CA as chelating agent, however, may result in a highly exothermic, non-uniform combustion reaction, adversely affecting the morphology of the powder [24]. For these reasons CA and EDTA are often employed as combined chelating agents [20,23,25,26].…”

“…mixed ionic and electronic conductivity is introduced by substitution of Ti by Fe. Such SrTi 1-x Fe x O 3-δ (STF100·x) perovskite materials are widely investigated as oxygen sensor material [22][23][24].…”