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2006 | 4 | 4 | 632-645
Tytuł artykułu

Synthesis and characterization of Al-and Y-Al-citrates as potential precursors for YAlO3

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Al-and Y-Al-citric complexes have been synthesized in ethylene glycol medium at conditions close to the ones used in polymerized complex method and their composition and spectral characteristics have been studied. Proofs have been found for the formation in the bimetallic system of a mixed-metal Al-Y-complex. Doubly ionized and esterified ligands take place in the Al-complex. All of the ligands forming Y-Al-complex are mono-or doubly esterified. Deprotonation of the alcoholic group takes place in the formation of the mixed-metal complex. Both complexes contain adduct-bonded ethylene glycol. Heating of the bimetallic complex or of the polyester resin formed leads to not phase-homogeneous YAlO3-along with cubic YAlO3, its orthorhombic modification as well as Y4All2O9 are found by X-ray diffractometry.
Wydawca

Czasopismo
Rocznik
Tom
4
Numer
4
Strony
632-645
Opis fizyczny
Daty
wydano
2006-12-01
online
2006-12-01
Twórcy
  • Faculty of Chemistry, University of Sofia, Sofia, 1164, Bulgaria
  • Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Sofia, 1113, Bulgaria
  • Faculty of Chemistry, University of Sofia, Sofia, 1164, Bulgaria
Bibliografia
  • [1] M. Kakihana, S. Kato, M. Yashima and M. Yoshimura: “Preparation of tetragonal ZrO2-12 mol% CeO2 and ZrO2-6 mol% YO1.5 solid solutions at reduced temperature by a simple aqueous solution route using citric acid as a complexant”, J. Alloys Comp., Vol. 280, (1998), pp. 125–130. http://dx.doi.org/10.1016/S0925-8388(98)00716-6[Crossref]
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  • [3] R. Todorovska, N. Petrova and D. Todorovsky: “Spray-Pyrolysis Deposition of Y2O3 Thin Films Using Citric Complexes as a Starting Material”, C. R. Acad. bulg. Sci., Vol. 56, (2003), pp. 41–44.
  • [4] R. Todorovska, St. Groudeva-Zotova, D. Todorovsky, G. Tzvetkov and P. Stefanov: “Highly Crystalline Y3Fe5O12 Thin Films by Citric Spray Pyrolysis”, J. Math. Synth. Process. Vol. 10, (2002), pp. 283–288. http://dx.doi.org/10.1023/A:1023050311111[Crossref]
  • [5] R. Todorovska, N. Petrova and D. Todorovsky: “Spray-pyrolysis deposition of LaMnO3 and La1 − x CaxMnO3 thin film”, Appl. Surf. Sci., (2005). [Crossref]
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  • [16] M. Arnaudov, M. Getsova, D. Todorovsky and M. Milanova: “IR spectral study of the system ethylene glycol-citric acid”, Anal. Lab., Vol. 7, (1998), pp. 70–74.
  • [17] M. Milanova, M. Kakihana, M. Arima, M. Yashima and M. Yoshimura: “A simple solution route to the synthesis of pure La2Ti2O7 and Nd2Ti2O7 at 700–800°C by polymerized complex method”, J. Alloys Comp., Vol. 224, (1996), pp. 6–10.
  • [18] M. Getsova and D. Todorovsky: “Thermochemical behaviour of lanthanide and lanthanide-titanium complexes”, Bulg. Chem. Commun., Vol. 32, (2000), pp. 89–104.
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  • [20] N. Petrova, D. Todorovsky and V. Vasileva: “Synthesis and characterization of Mn-, La-Mn and La-Ca-Mn citrates as precursors for LaMnO3 and La1−x CaxMnO3”, Centr. Europ. J. Chem., Vol. 3, (2005), pp. 263–278. http://dx.doi.org/10.2478/BF02475995[Crossref]
  • [21] V.A. Lysenko and G.F. Voronin: “Optimization of the thermodinamic properties and phase equilibria of Y and Al oxides”, Vestn. Mosk. Univ., Vol. 31, Ser. 2, (1990), pp. 30–33 (in Russian).
  • [22] V.B. Glushkova, V.A. Krzhizhanovskaya and O.N. Egorova: “Physicochemical investigations of the compounds in the system Y2O3-Al2O3”, Dokl. AN SSSR, Vol. 260, (1981), pp. 1157–1160 (in Russian).
  • [23] K.I. Portnoj and N.I. Timofeeva: Kislorodnye soedineniya redkozemel’nykh elementov (Oxygen compounds of the rare earths), Metallurgiya, Moskva, 1986, p. 132 (in Russian).
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Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_2478_s11532-006-0032-2
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