Controllable Assembly of BaCrO4@B Core Shell Energetic Microspheres Based on Micro-scale Multiphase Flow: Precise Structural Design and Energy Modulation

IF 4.7 Q2 CHEMISTRY, MULTIDISCIPLINARY

Energetic Materials Frontiers Pub Date : 2026-06-01 DOI:10.1016/j.enmf.2026.06.001

J LIU, Meng Wang, Zhe Zhai, Fang-le Wu, Ze-yu CHENG, Li Liu, Bin Zhou, Peng Zhu

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Abstract

Precise structural modulation is critical for the functionalization of energetic materials. This study proposes a novel assembly strategy for BaCrO 4 @B core-shell microspheres based on micro-scale multiphase flow regulation. High-quality BaCrO 4 cores (sphericity >95%) were prepared via droplet ejection, followed by uniform coating of Boron/NC shells using pneumatic atomization. The surface morphology, elemental distributions, crystal structures, and pore architectures of the composite microspheres were systematically characterized, while their non-isothermal thermal decomposition behaviors and laser-ignited combustion characteristics were comprehensively evaluated. The study elucidates a self-limiting deposition mechanism and binder bridging effect, enabling precise shell thickness regulation (12.5 wt%–19.2 wt% B). This "core-shell decoupling and sequential refinement" strategy provides an ideal platform for elucidating structure-performance relationships and customizing functional energetic materials.

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基于微尺度多相流的BaCrO4@B核壳含能微球可控装配：精密结构设计与能量调制

精确的结构调制是高能材料功能化的关键。本研究提出了一种基于微尺度多相流调节的BaCrO 4 @B核壳微球装配策略。采用液滴喷射法制备高质量的BaCrO 4芯（球度>95%），然后采用气动雾化对硼/NC壳进行均匀涂层。系统表征了复合微球的表面形貌、元素分布、晶体结构和孔隙结构，并对其非等温热分解行为和激光点燃燃烧特性进行了综合评价。该研究阐明了一种自限性沉积机制和粘结剂桥接效应，实现了精确的壳层厚度调节（12.5 wt% -19.2 wt% B）。这种“核壳解耦和顺序细化”策略为阐明结构-性能关系和定制功能含能材料提供了理想的平台。

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