Sub-solidus phase relations and a structure determination of new phases in the CaO–La2O3–TiO2 system. Issue 10 (September 2015)

• Record Type: Journal Article
• Authors: Vidmar, Maja; Golobič, Amalija; Meden, Anton; Suvorov, Danilo; Škapin, Srečo D.
• Is Part Of: Journal of the European Ceramic Society. Volume 35:Issue 10(2015:Oct.)
• Page Start: 2801
• Page End: 2814
• Publication Date: 2015-09
• Subjects: Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2015.03.038
• Languages: English
• ISSNs: 0955-2219

Abstract

<abstract abstract-type="author" id="abs0005"> <title id="sect0005">Abstract</title> <sec> <p id="spar0005">Sub-solidus phase relations in the ternary CaO–La₂O₃–TiO₂ system at 1400 °C in air were determined. The multi-phase samples were prepared by a solid-state reaction method, whereas the single-phase samples for the structure analysis of selected solid solutions were prepared by a wet-precipitation method in order to provide good homogeneity of the starting mixtures. The phases in the prepared samples were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS). The oxides form seven ternary compounds in the equilibrium state, many solid solutions (which extend across a broad concentration region), and a large, single-phase area based on the CaTiO₃ solid solution. The structures of several new phases – solid solutions on the tie lines CaTiO₃–Ca₃La₄Ti₃O₁₅ and La₂TiO₅–Ca₃La₄Ti₃O₁₅ – were determined in detail.</p> </sec> </abstract>