Synthesis and Research of the Properties of Lanthanum and Neodymium Indates
Tóm tắt
Single-phase nanocrystalline (18–20 nm) lanthanum indate powder (LaInO3) and neodymium indate powder (NdInO3) with the structure of orthorhombic perovskite are synthesized by the coprecipitation of hydroxides with the simultaneous ultrasonic treatment of the precipitation and subsequent firing of the powder-precursors at a temperature of 700°C. Ceramic samples with an open porosity of 4 to 5% are obtained during the sintering of the LaInO3 and NdInO3 powders at 1300°C (2 h). The range of changes in the electrical resistance of the sintered ceramics in the temperature range 400–1000°C is established. It is revealed that the heat treatment (1000°C) of indates of lanthanum and neodymium in argon reduces the electrical resistance by 2–3 orders of magnitude compared to their heat treatment in air.
Tài liệu tham khảo
Arsen'ev, P.A., Kovba, L.M., and Bagdasarov, Kh.S., Soedineniya redkozemel’nykh elementov. Sistemy s oksidami I–III grupp (Compounds of Rare Earth Elements. Systems with Oxides of Groups I–III), Moscow: Nauka, 1983.
Boulon, G., Fifty years of advance in solid-state laser materials, Opt. Mater., 2012, vol. 34, no. 3, pp. 499–512.
Bünzli, J.C.G., Comby, S., Chauvin, A.S., and Vandevyver, C.D.B., New opportunities for lanthanide luminescence, J. Rare Earths, 2007, vol. 25, no. 3, pp. 257–274.
Liu, X. and Lin, J., Synthesis and luminescent properties of LaInO3: Re3+ (Re = Sm, Pr and Tb) nanocrystalline phosphors for field emission displays, Solid State Sci., 2009, vol. 11, no. 12, pp. 2030–2036.
Yukhno, E.K. and Bashkirov, L.A., Physical and chemical properties of solid solutions based on lanthanum indate doped by Pr3+, Cr3+, Mn3+ ions, Tr. BGTU, Khim. Tekhnol. Neorg. V-v., 2015, no. 3, pp. 102–107.
Kandidatova, I.N., Bashkirov, L.A., and Petrov, G.S., Thermal expansion, thermal analysis of solid solutions of indices Sm1-xLaxInO3, Fiz. Khim. Stekla, 2013, vol. 39, no. 1, pp. 147–152.
Gusev, A.I., Nanomaterialy, nanostruktury, nanotekhnologii (Nanomaterials, Nanostructures, Nanotechnologies), 2nd ed., Moscow: Nauka-Fizmatlit, 2007.
Fedorov, P.I., Mokhosoev, M.V., and Alekseev, F.P., Khimiya galliya, indiya i talliya (Chemistry of Gallium, Indium and Thallium), Novosibirsk: Nauka, 1977.
Morozova, L.V., Tikhonov, P.A., and Glushkova, V.B., The processes of evaporation of indium oxide from ceramic compositions in the ZrO2–In2O3 system, Zh. Prikl. Khim., 1989, vol. 62, no. 4, pp. 941–942.
Morozova, L.V., Kalinina, M.V., Arsent’ev, M.Yu., and Shilova, M.V., Influence of cryochemical and ultrasonic processing on the texture and thermal decomposition of xerogels and properties of nanoceramics in the ZrO2–Y2O3–Al2O3 system, Inorg. Mater., 2017, vol. 53, no. 6, pp. 640–647.
Al’myasheva, O.V., Fedorov, B.A., Smirnov, A.V., and Gusarov, V.V., Size, morphology and particle structure of zirconia nanopowder obtained under hydrothermal conditions, Nanosist.: Fiz., Khim.,Mat., 2010, vol. 1, no. 1, pp. 26–36.
Gusev, A.I. and Kurlov, A.S., Certification of nanocrystalline materials by particle (grain) size, Metallofiz. Noveishie Tekhnol., 2008, vol. 30, no. 5, pp. 679–694.
Khasanov, O.L., Dvilis, E.S., Polisadova, V.V., and Zykova, A.P., Effekty moshchnogo ul’trazvukovogo vozdeistviya na strukturu i svoistva nanomaterialov, Uchebnoe posobie (Effects of Powerful Ultrasonic Effects on the Structure and Properties of Nanomaterials, The School-Book), Tomsk: Tomsk. Politekh. Univ., 2008.
Oreshkin, P.T., Fizika poluprovodnikov i dielektrikov (Physics of Semiconductors and Insulators), Moscow: Vysshaya shkola, 1977.
Morozova, L.V., Kalinina, M.V., Tikhonov, P.A., Drozdova, I.A., and Shilova, O.A., Electroconducting ceramics based on In2O3, CdO, and LaCrO3, Glass Phys. Chem., 2017, vol. 43, no. 3, p. 276.