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Nanocrystalline Bi2Cu0.1V0.9O5.35 (BCVO) powders were synthesized by solution-based chemical methods. Materials have been characterized by the thermogravimetric analysis, X-ray diffraction, and scanning/transmission electron microscopy. The sintering temperatures to complete phase transition are above 330 °C, 320 °C and 470 °C for the primary powders obtained by the sol-gel technique, an ethylenediaminetetra acetate-citrate combustion gel route and a modified reversing titration co-precipitation method (RP), respectively, which were much lower than the 600 °C required by conventional solid state method (SS). The powders synthesized by EC with 2 wt. % of surfactant, polyethylene glycol PEG 4000 have rather a narrow size distribution, within 30-50 nm, and as the PEG 4000 content increases, they form agglomerates irregular in shapes. In RP the optimal concentration of PEG 4000 is about 5 wt. % and the average grain size of the sample is 20 nm. The modified reaction in homogeneous solutions can be controlled to produce uniform BCVO nanoparticles.
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1055--1066
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Bibliogr. 19 poz.
Bibliografia
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Typ dokumentu
Bibliografia
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bwmeta1.element.baztech-article-BPW7-0012-0013