Abstract Samples containing CuFe2O4 and CuO nanoparticles were synthesized by coprecipitation method and subjected to thermal treatment at 300 °C, 500 °C, 700 °C, 900 °C and 1100 °C. Depending on the synthesis conditions, high-temperature treatment of the prepared samples brought to the formation of CuFe2O4 with a tetragonal or cubic structure, which was confirmed by X-ray diffraction analysis. The influence of formation mechanism onto the crystallite sizes of nanoparticles and structural transformation of CuFe2O4 is discussed. For the first time it was shown that variations of the initial amount of Fe3+and Cu2+ ions precursors resulted in the formation of low- and high-temperature CuFe2O4 phase at the same annealing temperature, 1100 °C.

中文翻译：

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1100℃低温和高温CuFe2O4相观察：Fe3+离子对CuFe2O4结构转变的影响

摘要 采用共沉淀法合成了含有CuFe2O4和CuO纳米颗粒的样品，并在300℃、500℃、700℃、900℃和1100℃下进行热处理。根据合成条件，所制备样品的高温处理导致形成具有四方或立方结构的 CuFe2O4，X 射线衍射分析证实了这一点。讨论了形成机制对纳米颗粒微晶尺寸和CuFe2O4结构转变的影响。首次表明 Fe3+ 和 Cu2+ 离子前驱体初始量的变化导致在相同的退火温度 1100 °C 下形成低温和高温 CuFe2O4 相。