Study on Optimum Composition and Characteristics of Pour-Casting Red Phosphorus Smoke Agents with Different Oxidizers

This study used experimental methods to explore the optimum composition and characteristics of pour-casting red phosphorus (RP) smoke agents with KNO3, MnO2 or SiO2 as the oxidizer.Taguchi experimental design method was adopted to design the experimental conditions, and three series of scaled-down test samples were prepared by vacuum pour-casting method in order to analyze the optimum parameter combinations for the minimum average burning rate.The combustion phenomena of these scaled-down test samples were recorded by the visual-image capture system, and the ignition and combustion temperatures were measured by the temperature measurement system.Subsequently, the uniformity of composition distribution, hardness and mechanical strength of three scaleddown test samples prepared with the optimum parameter combination were observed and measured by scanning electron microscopy coupled with energy