Synthesis and peculiarities of electric properties of Li1.3Zr1.4Ti0.3Al0.3(PO4)3 solid electrolyte ceramics

• Published in: Electrochimica acta Vol. 51; no. 27; pp. 6194 - 6198
• Main Authors: ORLIUKAS, A. F, DINDUNE, A, KANEPE, Z, RONIS, J, BAGDONAS, B, KEZIONIS, A
• Format: Conference Proceeding Journal Article
• Language: English
• Published: Oxford Elsevier 25.08.2006
• Subjects: Chemistry; Electrochemistry; Exact sciences and technology; General and physical chemistry; Properties of electrolytes: conductivity; Alkali metal Compounds; Relaxation dispersion; Transition metal Compounds; Dielectric properties; Ionic conductivity; Solid electrolyte; Experimental study; Zirconium phosphate; Multi-element compound; Dielectric relaxation; Intercalation compound; Electrochemical properties; Synthesis; Lithium phosphate; Titanium phosphate; Sintering; Ceramic; Aluminium phosphate; Permittivity; Ceramic materials
• ISSN: 0013-4686; 1873-3859
• DOI: 10.1016/j.electacta.2005.11.049

The solid electrolyte Li1.3Zr1.4Ti0.3Al0.3(PO4)3 compound was synthesized by a solid-state reaction. The ceramic samples were sintered 1, 2 and 3 h and studied by X-ray and complex impedance spectroscopy in the frequency range from 106 to 1.2 x 10(9) Hz in temperature range from 300 to 600 K. The investigated compound at room temperature belongs to rhombohedral symmetry (s.g. R3c) with six formula units in the lattice. Two regions of relaxation dispersion were found. The dispersions are related to the fast Li+ ion transport in the grain and grain boundaries of ceramics. Varying of the sintering time affects the density of the ceramics, the values of total conductivity and its activation energy. The values of grain conductivity, its activation energy, and relaxation frequency in grain, dielectric permittivity and dielectric losses are independent from sintering duration of the ceramics. The value of activation energy of grain conductivity and activation energy of relaxation frequency is the same. That can be attributed to the fact that the temperature dependence of the grain conductivity is caused only by the mobility of Li+ ions, while a number of charge carriers remains constant with temperature.