Synthesis of nanocrystalline YSZ (ZrO2–8Y2O3) powder by polymerized complex method

Effect of Y2O3 addition on the phase composition and crystal growth behavior of YSZ nanocrystals prepared via coprecipitation process

“…Solutions with Y 2 O 3 to (Y 2 O 3 + ZrO 2 ) ratios varying from 3, 5, 7, to 8wt% were prepared and labeled as nYSZ (n=3, 5,7,8). The mixed solution was agitated at 25 °C with a magnetic stirrer for 30 min, and then ammonia was added slowly until the pH value reached 10.…”

“…Due to the exceptional properties, such as inherent oxidation resistance, high thermal expansion coefficient, low thermal conductivity, excellent thermal stability and high ionic conductivity, zirconia find wide applications in high-temperature structural materials [1,2], thermal barrier coatings [3,4], oxygen sensors [5,6], interferometric filters [7], and electrolyte for solid oxide fuel cells (SOFCs) [8,9]. It is generally known that pure zirconia exists in three crystallographic phases: low-temperature monoclinic phase (m-ZrO 2 , space group P2 1 /c), intermediate-temperature tetragonal phase (t-ZrO 2 , space group P4 2 /nmc) and high-temperature cubic phase (c-ZrO 2 , space group Fm3m).…”

Prominent enhancement of La2O3 addition to the support on the NOx storage and sulfur-resistance performance of Pt/K/TiO2–Al2O3 lean-burn NOx trap catalysts

“…For the support precursor TAL(3) dried at 120 C, there are three bands appearing at 1738, 1635 and 1398 cm À1 , which are related to the stretching modes of carboxylate. The band at 1738 cm À1 is attributed to C]O stretching mode of the ester group which was formed by esterification of citric acid and ethylene glycol [24]. The bands around 1398 and 1635 cm À1 correspond to the symmetric and asymmetric stretching vibrations of carboxylate group, respectively.…”

Fuel Cell: A Review and a New Approach About YSZ Solid Oxide Electrolyte Deposition Direct on LSM Porous Substrate by Spray Pyrolysis

“…The bands presented around 2330 cm -1 (zone II) correspond to adsorbed atmospheric CO 2 , according to (Andrade et al, 2006). In the region from 1630 to 1619 cm -1 (zone III), the bands correspond to asymmetric and symmetric stretch of COO-group (Farhikhte, 2010). Variations of the solvent used in the precursor solution cause changes in the solution characteristics.…”