【摘要】 针对硼(B)元素燃烧热值和燃烧效率的提高,设计并通过粉末烧结的方法制备了B含量分别为38.8wt.%、41.8wt.%、42.8wt.%的三种Al-B合金粉,研究了Al-B合金粉中B含量以及Al-B粉粒度对其燃烧热值和燃烧效率的影响。研究结果表明,三种Al-B合金粉中,B含量为41.8wt.%的Al-B粉体燃烧热值最高;B含量为41.8wt.%的Al-B粉体平均粒径约为8μm时,因粉体粒径减小可缩短氧气的扩散距离而减小了氧气扩散阻力并提高了氧化放热程度,燃烧热值可高达36.28MJ/kg,Al-B粉燃烧效率为87.3%。更多还原

【Abstract】 In order to improve the combustion calorific value and combustion efficiency of element B,Al-B alloy powders with different B contents of 38.8 wt.%,41.8 wt.% and 42.8 wt.% were designed and prepared by powder sintering method.The effects of B content and particle size of the Al-B alloy powders on combustion calorific value and combustion efficiency were studied.The results show that the Al-B alloy powder with a B content of 41.8 wt.% exhibits the highest combustion heat value among the Al-B alloy powders.Moreover,when the average particle size is approximately 8μm,the Al-B alloy powder with 41.8 wt.% B shows a combustion calorific value as high as 36.28 MJ/kg and a combustion efficiency of 87.3%,because of the decrease of oxygen diffusion resistance by shortening the diffusion distance within finer powders.更多还原