高氯酸钾粒径对热电池用加热片性能影响研究

Influences of KClO4 particle sizes on properties of the heat pellets

制备了20~40μm、50~80μm、150~180μm KClO4材料,采用X射线衍射仪(XRD)和扫描电子显微镜(SEM)等对制备的KClO4材料进行了表征。将不同粒径KClO4材料制备成热电池用加热片,研究了密度和KClO4材料粒径对加热片燃速和点火灵敏度的影响。研究结果表明,在相同的KClO4粒径条件下,加热片的压实密度提高,加热片的点火能提高,燃速降低。当KClO4材料的粒径增加时,KCl04材料比表面积降低,加热片中KClO4颗粒间距增大,加热片的点火灵敏度下降,燃速降低。

20~40 μm,50~80 and 150~180 μm KClO4 materials were investigated by XRD and SEM.The heat powders with different KClO4 particle sizes were fabricated,and the influences of the heat powder densities and the particle sizes of KClO4 on the burning rates and ignition energies of the heat pellets had been studied.The results showed that,the ignition energy increased and the burning rate decreased as the heat powder density increased.The ignition energy decreased and the burning rate increased as the KCl04 particle sizes decreased.The smaller KClO4 particle size resulted in higher burn rate and lower ignition sensitivity.