Electrical and thermal conductivities of rare-earth A2Zr2O7 (A = Pr, Nd, Sm, Gd, and Er)

A. Quiroz, V. Garcia-Vazquez, C. Guarneros Aguilar, R. Agustin-Serrano, E. Chavira, M. Abatal

Abstract


Structural and thermoelectric properties of rare-earth zirconates A2Zr2O7, with A = Pr, Nd, Sm, Gd, and Er, were studied. Samples were prepared by solid-state reaction at ambient pressure with temperatures between 1000 and 1400 °C. The resulting compounds were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM/EDS). The XRD analyses showed the formation of polycrystalline Pr2Zr2O7, Nd2Zr2O7, Sm2Zr2O7, Gd2Zr2O7 and Er2Zr2O7 phases, with a cubic cell (space group Fm3m) and traces of the raw used materials. The micrographs obtained by SEM show the formation of heterogeneous grains with a size that ranges from 0.7 to 4.7 μm. All A2Zr2O7 samples present porous surfaces. Thermal conductivities were measured at different temperatures, from 300 to 900 K. In most of the samples, the thermal conductivity monotonically decreases with temperature, from 0.40 – 1.17 W/mK at 300 K to 0.27 – 0.77 W/mK at 773.15 K. At a fixed temperature, the thermal conductivity decreases almost monotonically with the ionic radius (IR) of the rare-earth elements (where IR (Er3+) = 0.890 Å < IR (Gd3+) = 0.938 Å < IR (Sm3+) = 0.958 Å < IR (Nd3+) = 0.983 Å < IR (Pr3+) = 0.99 Å).


Keywords


Solid state chemistry; Thermal analysis; X-ray diffraction and scattering; Thermoelectrics; Zirconates

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Snyder, G. J.; Christensen, M.; Nishibori, E.; Caillat, T.; Iversen, B. B. Disordered Zinc in Zn4Sb3 with Phonon-Glass and Electron- Crystal Thermoelectric Properties. Nat. Mater. 2004, 3, 458−463.

Hsu, K. F.; Loo, S.; Guo, F.; Chen, W.; Dyck, J. S.; Uher, C.; Hogan, T.; Polychroniadis, E. K.; Kanatzidis, M. G. Cubic AgPbmSbTe2+m: Bulk Thermoelectric Materials with High Figure of Merit. Science 2004, 303, 818−821.

Heremans, J. P.; Jovovic, V.; Toberer, E. S.; Saramat, A.; Kurosaki, K.; Charoenphakdee, A.; Yamanaka, S.; Snyder, G. J. Enhancement of Thermoelectric Efficiency in PbTe by Distortion of the Electronic Density of States. Science 2008, 321, 554−557.

Sales, B. C.; Mandrus, D.; Williams, R. K. Filled Skutterudite Antimonides: A New Class of Thermoelectric Materials. Science 1996, 272, 1325.

Sootsman, J. R.; Chung, D. Y.; Kanatzidis, M. G. New and Old Concepts in Thermoelectric Materials. Angew. Chem., Int. Ed. 2009, 48, 8616−8639.

Nolas, G. S.; Sharp, J.; Goldsmid, J. Thermoelectrics: Basic Principles and New Materials Developments; Springer Science & Business Media: Berlin, Germany, 2013; Vol. 45.

Snyder, G. J.; Toberer, E. S. Complex Thermoelectric Materials. Nat. Mater. 2008, 7, 105−114.

Bevan, D. J. M.; Summerville, E. Mixed Rare Earth Oxides; in Handbook on the Physics and Chemistry of Rare Earths: Non-Metallic Compounds I. Edited by K. A. Gschneider and L. R. Eyring. North–Holland Physics Publishing, New York. 1979; pp. 412–515.

Subramanian, M. A.; Sleight, A. W. Rare Earth Pyrochlores; in Handbook on the Physics and Chemistry of Rare Earths. Edited by K. A. Gschneider and L. Erying. Elsevier Science Publishers, Oxford, U.K. 1993; pp. 225–48.

Shimamura, K.; Arima, T.; Idemitsu, K., Inagaki, Y. Thermophysical Properties of Rare-Earth-Stabilize Zirconia and Zirconate Pyrochlores as Surrogates for Actinide-Doped Zirconia. Int. J. Thermophys. 2007, 28, 1074–1084.

Ren, K., Wang, Q., Shao, G., Zhao, X. and Wang, Y. Multicomponent high-entropy zirconates with comprehensive properties for advanced thermal barrier coating. Scr. Mater. 2020, 178, 382–386.

Kim, S.Y., Lee, G.E; Kim, I.H. Thermoelectric Properties of Mechanically-Alloyed and Hot-Pressed Cu12-x Cox Sb4S13 Tetrahedrites. J. Korean Phy. Soc. 2019, 74, 967-971.

Aguilar, C.G., Moreno, C.E., Castillo, M.P.; Caballero-Briones, F. Effect of calcination temperature on structure and thermoelectric properties of CuAlO2 powders J. Mater. Sci. 2018, 53, 1646–1657.

Park, K.; Ko, K.Y.; Seo, W.-S. Thermoelectric properties of CuAlO2. J. Eur. Ceram. Soc. 2005, 25, 2219 –2222

Kingery, W. D.; Bowen, H. K.; Uhlmann, D. R. Introduction to Ceramics (2nd ed.). John Wiley & Sons, New York, 1976, p. 519.

Moon, J.W.; Seo, W.S.; Okabe, H.; Okawa, T. and Koumoto K. Ca-doped RCoO3 (R = Gd, Sm, Nd, Pr) as thermoelectric materials. J. Mater. Chem. 2000, 10, 2007–2009.

Vassen, R.; Cao, X.; Tietz, F.; Basu, D.; Stoever, D. Zirconates as New Materials for Thermal Barrier Coatings. J. Am. Ceram. Soc. 2000, 83, 2023–2028.

Maloney, M. J. Thermal Barrier Coatings Systems and Materials. U.S. Pat. 2000, No. 6, 117-560.

Maloney, M. J. Thermal Barrier Coating Systems and Materials. U.S. Pat. 2001, No. 6, 284-323.

Subramanian, R. Thermal Barrier Coating Having High Phase Stability. U.S. Pat. 2001, No. 6, 258-467.

Suresh, G.; Seenivasan, G.; Krishnaiah, M. V.; Murti, P. S. Investigation of the Thermal Conductivity of Selected Compounds of Gadolinium and Lanthanum. J. Nucl. Mater. 1997, 249, 259–61.

Suresh, G.; Seenivasan, G.; Krishnaiah, M. V.; Murti, P. S. Investigation of the Thermal Conductivity of Selected Compounds of Lanthanum, Samarium and Europium. J. Alloys Compd. 1998, 269, L9–L12.

Jie, W.; Xuezheng W.; Nitin P. P.; Paul G. K.; Maurice G.; Eugenio G.; Pilar M.; Maria I. O. Low-Thermal-Conductivity Rare-Earth Zirconates for Potential Thermal-Barrier-Coating Applications. J. Am. Ceram. Soc. 2002, 85, 3031-3035.

Zhan-Guo, L; Ouyang, J-H.; Zhou, Y.; Jing, L.; and Xiao-Liang, X. (Ln0.9Gd0.05Yb0.05)2Zr2O7 Ceramics with Pyrochlore Structure as Thermal Barrier Oxides. Adv. Eng. Mater. 2008, 8, 535, 754-758.

Zhan-Guo, L; Ouyang, J-H.; Zhou, Y.; Jing, L.; and Xiao-Liang, X. (Ln0.9Gd0.05Yb0.05)2Zr2O7 Ceramics with Pyrochlore Structure as Thermal Barrier Oxides. Adv. Eng. Mater. 2010, 8, 535, 754-758.

Kendrick, E; Sansom, J. E.; Tolchard, J. R.; Islam, J. R.; Slater, P. R. Neutron diffraction and atomistic simulation studies of Mg doped apatite-type oxide ion conductors. Faraday. Discuss. 2007, 134, 181-194.

Sansom, J. E. H.; Najib. A.; Slater, P. R. Oxide ion conductivity in mixed Si/Ge-based apatite-type systems. Solid. State. Ion. 2004, 175, 353-355.

Quiroz, A.; Chavira, E.; Garcia-Vazquez, V.; González, G.; Abatal, M. Structural, electrical and magnetic properties of the pyrochlorate Er2-xSrxRu2O7 (0 ≤ x ≤ 0.10) system. Rev. Mex. Fis. 2018, 64, 222-227.

Lutterotti, L. MAUD, Int. Union of Crystallography CPD Newsletter (IUCr), No. 24. 2000

Wenk, H.-R.; Matthies S. and Lutterotti, L. "Texture analysis from diffraction spectra", Mater. Sci. Forum, 1994, 157-162, 473-480.

Ferrari, M.; Lutterotti, L. Method for the simultaneous determination of anisotropic residual stresses and texture by x-ray diffraction. J. Appl. Phys. 76 (1994) 7246

Zhang, Y., Mack, D. E., Jarligo, M. O., Cao, X., Vaßen, R., and Stöver, D. Partial evaporation of strontium zirconate during atmospheric plasma spraying. J. Therm. Spray. Tech. 2009, 184, 694-701.

Yige Wang, Bo Gao, Qian Wang, Xiaohui Li, Zhi Su, and Aimin Chang. A2Zr2O7 (A = Nd, Sm, Gd, Yb) zirconate ceramics with pyrochlore-type structure for high-temperature negative temperature coefficient thermistor. J Mater Sci Ceramics. 2020, 55, 15405–15414

Popov, V.V.; Menushenkov, A.P.; Ivanov, A.A.; Gaynanov, B.R.; Yastrebtsev, A.A.; d’Acapito, F.; Puri, A.; Castro, G.R.; Shchetinin, I.V.; Zheleznyi, M.V.; Zubavichus, Ya.V.; Ponkratov. K.V. Comparative analysis of long- and short-range structures features in titanates Ln2Ti2O7 and zirconates Ln2Zr2O7 (Ln = Gd, Tb, Dy) upon the crystallization process. J. Phys. and Chem. of Solid. 2019, 130, 144-153.

ICDD , International Center for Diffraction Data, http://www.icdd.com

Shannon, R. D.; Prewitt, C. T. Acta Cryst. 1976, B25, 925

Lucuta, P. GR.; Constantinescu, FL.; Barb, D. Structural Dependence on Sintering Temperature of Lead Zirconate-Titanate Solid Solutions. J. Am. Ceram. Soc. 1985, 68 (10), 533-37.

Pranav P. Naik; Snehal S. Hasolkar. Consequence of B-site substitution of rare earth (Gd+3) on electrical properties of manganese ferrite nanoparticles. J. Mater. Sci. Electronics. 2020, 31, 13434–13446.

Chetty, R.; Bali, A., Naik, M. H., Rogl, G., Rogl, P., Jain, M.; Suwas, S.; Malli, R.C. Thermoelectric properties of Co substituted synthetic tetrahedrite. Acta Mater. 2015, 100, 266-274.

Li, Y.; Kowalski, P. M.; Beridze, G.; Birnie, A. R.; Finkeldei, S.; Bosbach, D. Defect formation energies in A2B2O7 pyrochlores. Scr. Mater. 2015, 107, 18-21.

Minervini, L.; Grimes, R. W; Sickafus, K. E. Disorder in Pyrochlore Oxides. J. Am. Ceram. Soc. 2000, 83, 1873-78.

Sickafus, K. E.; Minervini, L.; Grimes, R. W.; Valdez, J. A.; Ishimaru, M.; Li, F.; McClellan, K. J.; Hartmann, T. Radiation tolerance of complex oxides. Science 2000, 289, 748.

Ma, W.; E. Mack, D.; Vaßen, R.; Stöver, D. Perovskite-Type Strontium Zirconate as a New Material for Thermal Barrier Coatings. J. Am. Ceram. Soc. 2008, 91 (8), 2630–2635.




DOI: https://doi.org/10.31349/RevMexFis.67.255

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REVISTA MEXICANA DE FÍSICA, year 67, issue 3, May-June 2021. Bimonthly Journal published by Sociedad Mexicana de Física, A. C. Departamento de Física, 2º Piso, Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad Universitaria, Alcaldía Coyacán, C.P. 04510 , Ciudad de México. Apartado Postal 70-348. Tel. (+52)55-5622-4946, https://rmf.smf.mx/ojs/rmf, e-mail: rmf@ciencias.unam.mx. Chief Editor: José Alejandro Ayala Mercado. INDAUTOR Certificate of Reserve: 04-2019-080216404400-203, ISSN: 2683-2224 (on line), 0035-001X (print), both granted by Instituto Nacional del Derecho de Autor. Responsible for the last update of this issue, Technical Staff of Sociedad Mexicana de Física, A. C., Fís. Efraín Garrido Román, 2º. Piso, Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad Universitaria, Alcaldía Coyacán, C.P. 04510 , Ciudad de México. Date of last modification, May 1st., 2021.

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