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Improved pressure discharge property of surface modified Al/Bi2O3 composites

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Abstract

Al/Bi2O3 nanothermites were prepared via a self-assembly method using poly-4-vinylpyridine and surface modification of particles by a kind of binder oleic acid respectively. The structures, morphology, and energetic properties were characterized. The pressure discharge properties were studied by a closed bomb. The peak pressures and pressurization rates of Al/Bi2O3/P4VP and Al/Bi2O3/OA were 5590 kPa, 13.976 GPa s–1 and 4858 kPa, 12.146 GPa s–1, respectively, better than those of Al/Bi2O3 prepared by normal ultrasonic method (4559 kPa, 11.397 GPa s–1 ). However, the decreased ignition delay time for self-assembled method and the increased one for modifying with oleic acid suggested different mechanism in accelerating the reaction of Al/Bi2O3. Moreover, the effect of mass fraction of oleic acid on nanothermite reaction was demonstrated.

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Correspondence to Yajun Wang.

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Wang, Y., Yu, H., Jiang, Z. et al. Improved pressure discharge property of surface modified Al/Bi2O3 composites. Russ J Appl Chem 90, 1330–1336 (2017). https://doi.org/10.1134/S1070427217080237

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  • DOI: https://doi.org/10.1134/S1070427217080237

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