Electrophysical properties of A3 IILaNb3O12 (AII = Sr, Ba) with slab perovskite-like structure





An 1BnO3n 1-type compounds, slab perovskite-like structure, ceramics, impedance, electroconductivity, dielectric constant.


High-stoichiometric polycrystalline samples of cation-deficient niobates A3IILaNb3O12(AII = Sr, Ba) with a three-slab perovskite-like structure were synthesized by the heat treatment of a charge of co-precipitated hydroxycarbonates. The electrophysical properties of ceramic samples made from them are investigated by the method of impedance spectroscopy. To simulate the impedance spectrum, the method of equivalent circuits represented by radio engineering elements was used. It allows one to isolate, in pure form, the properties of microcrystalline grains of a ceramics, that is, the substance under study itself, without the influence of the intercrystalline and electrode effects. The dependences of the complex impedance Z (v) of these compounds on the frequency (0.1-106 Hz) of the probing sinusoidal electrical signal and temperature (300-700 K) have been established and analyzed. The temperature dependence of the d. c. electrical conductivity, temperature and frequency dependences of the real component of the dielectric constant ε'‎, as well as the activation energies of the electrical conductivity of A3IILaNb3O12 ceramic grains (AII = Sr, Ba) were determined. The possibility of using the synthesized materials for the manufacture of thermistors highly sensitive and resistant to aggressive operating conditions with a nonlinear characteristic and a wide range of operating temperature has been established.


Sebastian, M. T. (2008). Dielectric materials for wireless communication. Oxford: Elsevier.

Lichtenberg, F., Herrnberger, A., Wiedenmann, K. (2008). Synthesis, structural, magnetic and transport properties of layered perovskite-related titanates, niobates and tantalates of the type AnBnO3n+2, A'Ak–1BkO3k+1 and AmBm–1O3m. Prog. Solid State Chem., 36, No. 4, pp. 253-387. https://doi.org/10.1016/j.progsolidstchem.2008.10.001

Fang, L., Zhang, H., Yu, Q., Su, H., Wu, B. & Cui, X. (2009). Sr3LaNb3O12: A new low loss and temperature stable A4B3O12-type microwave dielectric ceramic. J. Am. Ceram. Soc., 92, No. 2, pp. 556-558. https://doi.org/10.1111/j.1551-2916.2008.02917.x

Fang, L., Li, C., Peng, X., Hu, C. & Wu, B. (2010). Two novel A4B3O12-type microwave ceramics with high-Q and nea-zero f. J. Mater. Res., 25, No. 7, pp. 1239-1242. ttps://doi.org/10.1557JMR.2010.0178

Hu, C., Fang, L., Su, H., Liu, L. & Wu, B. (2009). Effects of Sr substitution on microwave dielectric properties of Ba3LaNb3O12 ceramics. J. Alloys Compd., 487, No. 1-2, pp. 504-506. https://doi.org/10.1016/j.jallcom.2009.07.175

Rawal, R., Feteira, A. M., Hyatt, N. C., Sinclair, D. C., Sarma, K. & Alford, N. McN. (2006). Microwave dielectric properties of hexagonal 12R–Ba3LaNb3O12 ceramics. J. Am. Ceram. Soc., 89, No. 1, pp. 332-335. https://doi.org/10.1111/j.1551-2916.2005.00664.x

Rawal, R., McQueen, A. J., Gillie, L. J., Hyatt, N. C., McCabe, E. E., Samara, K., Alford, N. McN., Feteira, A., Reaney, I. M. & Sinclair, D. C. (2009). Influence of octahedral tilting on the microwave dielectric properties of A3LaNb3O12 hexagonal perovskites (A = Ba, Sr). Appl. Phys. Lett., 94, 192904. https://doi.org/10.1063/1.3129867

Antonov, V. А., Arsenev, P. А., Bagdasarov, H. S., Evdokimov, А. А., Kopylova, Е. K. & Tadgi-Ashlaev, H. G. (1986). Synthesis and some properties of single crystals Ba3LaNb3O12. Inorg. Mater., 22, No. 3, pp. 466-470 (in Russian).

Tabacaru, C., Aguadero, A., Sanz, J., Chinelatto, A. L., Thursfield, A., Pérez-Coll, D., Metcalfe, I. S., Fernandez-Díaz, M. T. & Mather, G. C. (2013). Protonic and electronic defects in the 12R-type hexagonal perovskite Sr3LaNb3O12. Solid State Ionics, 253, pp. 239-246. https://doi.org/10.1016/j.ssi.2013.10.031

Chinelatto, A. L., Boulahya, K., Pérez-Coll, D., Amador, U., Tabacaru, C., Nicholls, S., Hoelzel, M., Sinclair, D. C., Mather, G. C. (2015). Synthesis of a 12R-type hexagonal perovskite solid solution Sr3NdNb3–xTixO12−δand the influence of acceptor doping on electrical properties. Dalton Trans., 44, No. 16, pp. 7643-7653. https://doi.org/10.1039/C5DT00170F

Titov, Y. A., Belyavina, N. M., Markiv, V. Ya., Slobodyanik, M. S. & Polubinskii, V. V. (2012). Crystal structure of Sr3LaNb3O12. Dopov. Naс. akad. nauk Ukr., No. 8, pp. 102-108 (in Ukrainian).

Titov, Y. A., Slobodyanik, N. S., Polubinskii, V. V. & Chumak, V. V. (2012). Mechanisms for the formation of layered A4B3O12 compounds from coprecipitated hydroxocarbonate and hydroxide systems. Theor. Exp. Chem., 47, No. 6, pp. 394-398. https://doi.org/10.1007/s11237-012-9233-2

Barsoukov, E. & Macdonald, J.R. (Eds.). (2005). Impedance spectroscopy: theory, experiment, and applications. Hoboken, New Jersey: John Wiley & Sons Inc.

Boukamp, B. A. (1986). A Nonlinear Least Squares Fit procedure for analysis of immittance data of electrochemical systems. Solid State Ionics, 20, No. 1, pp. 31-44. https://doi.org/10.1016/0167-2738(86)90031-7

V’yunov, O. I., Kovalenko, L. L. & Belous, A. G. (2003). The effect of isovalent substitution and dopants of 3d-metals on the properties of ferroelectrics-semiconductors. Condens. Matter Phys., 6, No. 2, pp. 213-220. https://doi.org/10.5488/CMP.6.2.213



How to Cite

Titov Ю., Slobodyanik М., Kuzmin Р., & Chumak В. (2021). Electrophysical properties of A3 IILaNb3O12 (AII = Sr, Ba) with slab perovskite-like structure. Reports of the National Academy of Sciences of Ukraine, (4), 53–60. https://doi.org/10.15407/dopovidi2021.04.053