The production of materials with dimensions in the nanometre range has continued to increase in recent years. In order to ensure safety when handling these products, the hazard potential of such innovative materials must be known. While several studies have already investigated the effects of explosions (such as maximum explosion pressure and maximum pressure rise) of powders with primary particles in the nanometre range, little is known about the ignition temperatures and flame velocities. Therefore, the minimum ignition temperature (MIT) of metallic nano powders (aluminium, iron, copper and zinc) was determined experimentally in a so called Godbert-Greenwald (GG) oven. Furthermore, the flame velocities were determined in a vertical tube. In order to better classify the test results, the tested samples were characterised in detail and the lower explosion limits of the tested dust samples were determined. Values for the burning velocity of aluminium nano powders are higher compared to values of micrometre powders (from literature). While MIT of nanometre aluminium powders is within the range of micrometre samples, MIT of zinc and copper nano powders is lower than values reported in literature for respective micrometre samples.

近年来，尺寸在纳米范围内的材料的生产持续增长。为了确保在处理这些产品时的安全性，必须知道这种创新材料的潜在危害。尽管有几项研究已经研究了具有纳米级初级粒子的粉末爆炸（例如最大爆炸压力和最大压力上升）的影响，但对点火温度和火焰速度知之甚少。因此，金属纳米粉（铝，铁，铜和锌）的最低着火温度（MIT）是在所谓的戈德伯特·格林瓦尔德（GG）烘箱中通过实验确定的。此外，在垂直管中确定火焰速度。为了更好地对测试结果进行分类，对测试样品进行了详细表征，并确定了测试粉尘样品的爆炸下限。与微米级粉末的值相比，铝纳米粉末的燃烧速度值更高（来自文献）。虽然纳米铝粉的MIT在微米样品的范围内，但是锌和铜纳米粉的MIT低于文献中报道的相应微米样品的值。