In contrast, the crystallite size of Fe 3 O 4 shows a decreasing trend (from 8 to 6 nm) with increasing ultrasonic time, while the crystallite size of CuO lacks a consistent pattern, fluctuating between 8 and 12 nm.
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Graphene/Fe<sub>3</sub>O<sub>4</sub>/CuO Nanocomposite as an Evaluation of Enhanced Thermal Decomposition of Ammonium Perchlorate via the Ultrasonic-Assisted Method.
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