“…Crystallisation of perovskite from amorphous precursors completely occurred in freshly prepared sample as calcination transformed amorphous precipitate to intermediate pyrochlore and then cubic LST [11]. The process involved the formation of titanium octahedral and reorganisation to crystalline LST with the other cations where peroxide-based route helped promote A-site substitution of lanthanum into strontium [12]. It is crucial that ammonia during peroxide route contributed to the formation of perovskite structure.…”
Section: Resultsmentioning
confidence: 99%
“…TEM micrographs in Figure 2 show that the particle size of LST powder was in the range of ∼20-30 nm, which is in good agreement with the calculation using the Scherrer equation (∼30 nm). The porous structure of LST powder was caused by the decomposition of peroxide decomposition resulting in oxygen gas release [12]. Figure 2 TEM images of the LST powder after calcination at 500°C.…”
Lanthanum-doped strontium titanate powder, La 0.05 Sr 0.95 TiO 3+δ , was fabricated by peroxidebased route and calcination of freshly prepared precipitate and precipitate after ageing was carried out. The starting titanium precursor was titanium nitride, which underwent the reaction to form titanium peroxohydroxide and then compound containing strontium and lanthanum. A perovskite structure of strontium titanate with 5 mol-% doped lanthanum was obtained after calcination of the freshly-prepared precipitate at 500°C. However, the ageing powder revealed the presence of the second phase of strontium carbonate after calcination at the same condition. Thermogravimetric results showed that the decomposition of ammonia promoted a reaction to form the pure phase of ceramic oxide only in the freshly calcined sample.
“…Crystallisation of perovskite from amorphous precursors completely occurred in freshly prepared sample as calcination transformed amorphous precipitate to intermediate pyrochlore and then cubic LST [11]. The process involved the formation of titanium octahedral and reorganisation to crystalline LST with the other cations where peroxide-based route helped promote A-site substitution of lanthanum into strontium [12]. It is crucial that ammonia during peroxide route contributed to the formation of perovskite structure.…”
Section: Resultsmentioning
confidence: 99%
“…TEM micrographs in Figure 2 show that the particle size of LST powder was in the range of ∼20-30 nm, which is in good agreement with the calculation using the Scherrer equation (∼30 nm). The porous structure of LST powder was caused by the decomposition of peroxide decomposition resulting in oxygen gas release [12]. Figure 2 TEM images of the LST powder after calcination at 500°C.…”
Lanthanum-doped strontium titanate powder, La 0.05 Sr 0.95 TiO 3+δ , was fabricated by peroxidebased route and calcination of freshly prepared precipitate and precipitate after ageing was carried out. The starting titanium precursor was titanium nitride, which underwent the reaction to form titanium peroxohydroxide and then compound containing strontium and lanthanum. A perovskite structure of strontium titanate with 5 mol-% doped lanthanum was obtained after calcination of the freshly-prepared precipitate at 500°C. However, the ageing powder revealed the presence of the second phase of strontium carbonate after calcination at the same condition. Thermogravimetric results showed that the decomposition of ammonia promoted a reaction to form the pure phase of ceramic oxide only in the freshly calcined sample.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
