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Developing energetic composite materials consisting of fuel and oxidizer is an effective strategy to enhance the energy release property. However, this strategy has rarely been applied in Potassium Perchlorate (KClO₄)-containing energetic materials, even though KClO₄ is a much stronger oxidizer than most previously reported metal-oxide oxidizer. One of the main obstacles is the lack of simple and in situ ways to introduce KClO₄ into the composite. In present work, micrometer KClO₄/Zirconium (KClO₄/Zr) composite particles were successfully prepared using a facile chemical solution-deposition method. The structure and particle morphologies of as-obtained KClO₄/Zr composite were characterized by X-ray diffraction (XRD) and scanning electronic microscope (SEM)-EDS (Energy Dispersive Spectrometer). The evolutionary combustion behavior was evaluated using flame-based light-radiation spectra and successive photography technique. Results showed that the morphology, light-radiation properties and flame-evolution characteristics of KClO₄/Zr composite varied with the content of KClO₄ and the particle size of Zr. Compared with the mechanical mixture of KClO₄/Zr, the KClO₄/Zr composite showed much higher light-radiation intensity and longer light-emission duration time after reasonably controlling the preparation parameters. Flame photographs revealed that the enhanced light radiation of KClO₄/Zr composite should be ascribed to higher use efficiency of "oxygen" in the oxidizer, which promoted both the solid⁻solid and solid⁻gas reaction pathways between KClO₄ and Zr.

Facile Preparation of Micrometer KClO4/Zr Energetic Composite Particles with Enhanced Light Radiation