title: Structural Behaviour of Solid Solutions in the NdAlO3-SrTiO3 System.
abstract: Single-phase mixed aluminates-titanates Nd1-xSrxAl1-xTixO3(x = 0.3 ÷ 0.9) were prepared from stoichiometric amounts of constituent oxides Nd2O3, Al2O3, TiO2and strontium carbonate SrCO3by solid-state reaction technique in air at 1773 K. Crystal structure parameters of Nd1-xSrxAl1-xTixO3were refined by full-profile Rietveld refinement in space groups R [Formula: see text] c (x = 0.3, 0.5, 0.7 and 0.8) and Pm [Formula: see text] m (x = 0.9). Comparison of the obtained structural parameters with the literature data for the end members of the system NdAlO3and SrTiO3revealed formation of two kinds of solid solutions Nd1-xSrxAl1-xTixO3with the cubic and rhombohedral perovskite structure. Morphotropic rhombohedral-to-cubic phase transition in Nd1-xSrxAl1-xTixO3series occurs at x = 0.84. Based on the results obtained as well as the literature data for the parent compounds, the tentative phase diagram of the NdAlO3-SrTiO3pseudo-binary system have been constructed.
authors.affiliation: Lviv Polytechnic National University, 12 Bandera Street, Lviv, 79013, Ukraine.
authors.forename: Natalia
authors.initials: N
authors.lastname: Ohon
authors.affiliation: Lviv Polytechnic National University, 12 Bandera Street, Lviv, 79013, Ukraine.
authors.forename: Roman
authors.initials: R
authors.lastname: Stepchuk
authors.affiliation: Lviv Polytechnic National University, 12 Bandera Street, Lviv, 79013, Ukraine.
authors.forename: Kostiantyn
authors.initials: K
authors.lastname: Blazhivskyi
authors.affiliation: Lviv Polytechnic National University, 12 Bandera Street, Lviv, 79013, Ukraine. crystal-lov@polynet.lviv.ua.
authors.forename: Leonid
authors.initials: L
authors.lastname: Vasylechko
keywords: Crystal structure; Perovskite aluminates and titanates; Phase transition; Solid solution