S 98 Synthesis of La1-xSrxMnO3+delta Manganites by Pyrohydrolysis of Nitrates / E. V. Mikhaleva, V. G. Vasil'ev, A. P. Nosov, E. V. Vladimirova, B. V. Slobodin // Glass Physics and Chemistry. - 2009. - Vol. 35, № 1. - P.81-86 : il. - Bibliogr. : p. 85-86 (29 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): МАНГАНИТЫ ПЕРОВСКИТОПОДОБНЫЕ -- ПИРОГИДРОЛИЗ НИТРАТОВ -- МАГНИТОСОПРОТИВЛЕНИЕ Аннотация: Single-phase finely dispersed perovskite-like manganites La1 –xSrxMnO3 +δ (0≤x≤0.33) with an average particle size of approximately 3μm were synthesized by the pyrohydrolytic method from a stoichiometric mixture of the corresponding metal nitrates at a temperature of 500° C in a water vapor atmosphere. The parameter δ was changed as a result of the subsequent heat treatment. It was established that the manganite La0.67Sr0.33MnO3 +δ synthesized by the pyrohydrolytic method is characterized by a more pronounced change in the magnetoresistance as compared to the manganite that had the same composition but was synthesized according to the conventional ceramic technique Полный текст |