Получение пенографита, содержащего ферромагнитные сплавы железа, кобальта и никеля

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Abstract

Предложена новая методика синтеза металлсодержащего пенографита, суть которой заключается в терморасширении смеси окисленного графита с нитратами металлов (Fe3+, Co2+, Ni2+) и восстановителем (меламином). При термообработке смеси в инертной атмосфере азота при 900°С происходит образование пенографита, на поверхности которого находятся мелкодисперсные частицы того или иного металлического сплава (FeCo, FeNi, FeCoNi, CoNi). Полученные образцы пенографита характеризуются низкой насыпной плотностью (до 6 г/л) и высокими значениями намагниченности насыщения (до 41.2 эме/г).

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About the authors

А. Д. Муравьев

Московский государственный университет им. М.В. Ломоносова

Author for correspondence.
Email: alex.mur97@mail.ru
Russian Federation, Москва

А. В. Иванов

Московский государственный университет им. М.В. Ломоносова

Email: alex.mur97@mail.ru
Russian Federation, Москва

В. А. Муханов

Московский государственный университет им. М.В. Ломоносова

Email: alex.mur97@mail.ru
Russian Federation, Москва

В. А. Разуваева

Московский государственный университет им. М.В. Ломоносова

Email: alex.mur97@mail.ru
Russian Federation, Москва

А. В. Васильев

Московский государственный университет им. М.В. Ломоносова

Email: alex.mur97@mail.ru
Russian Federation, Москва

П. Е. Казин

Московский государственный университет им. М.В. Ломоносова

Email: alex.mur97@mail.ru
Russian Federation, Москва

В. В. Авдеев

Московский государственный университет им. М.В. Ломоносова

Email: alex.mur97@mail.ru
Russian Federation, Москва

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Supplementary files

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2. Fig. 1. Diffractograms of PG-FeCo samples obtained in air atmosphere (1) and nitrogen atmosphere (2)

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3. Fig. 2. Diffractograms of PG-FeNi samples obtained in air atmosphere (1) and nitrogen atmosphere (2)

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4. Fig. 3. Diffractograms of PG-FeCoNi samples obtained in air atmosphere (1) and nitrogen atmosphere (2)

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5. Fig. 4. Diffractograms of PG-CoNi samples obtained in air atmosphere (1) and nitrogen atmosphere (2)

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6. Fig. 5. SEM image, EDX spectrum and elemental surface mapping of PG-FeCo-N2 sample

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7. Fig. 6. SEM image, EDX spectrum and elemental mapping of the surface of the PG-CoNi-N2 sample

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8. Fig. 7. PG-FeCoNi-N2 sample containing an alloy of iron with nickel and cobalt attracted to a magnet

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9. Fig. 8. Magnetic hysteresis curves of PG samples containing different alloys

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