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Development and applications of ultrafine aluminium powders

机译：超细铝粉的开发与应用

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Over the last 20 years or so, a variety of new technologies has been developed to produce sub-micron powders. Among the products attracting interest is nanoaluminium which is being evaluated in specialist propulsion and exothermic end-uses. This paper examines the advances made in 'nanopowder' production in the context of the existing aluminium powder industry where finest commercial grades have a median size of ～6 μm (one or two orders of magnitude coarser than nanopowders) and which today supplies the markets being targeted by nanopowders with coarser, but effective products. Are there genuine market opportunities for nanoaluminium and if so, how will they be produced? One the one hand there are the novel nanopowder production methods which are high yielding but generally slow and costly, while on the other, there is the very fine fraction from conventional atomising routes which generate a very low yield of sub-micron powder but which nevertheless can translate into a meaningful rate as part of the bulk production. Can conventional routes ever hope to make sufficient volumes of nanopowders cost effectively and which will be the favoured routes in future? Moreover, what of the 'ultrafine' size range (～0.5—5 μm) which is of more immediate potential interest to today's powder users. This paper seeks to identify the near term opportunities for application of low volume/high value ultrafine and nano powders.
机译：在过去的20年左右的时间里，已经开发出了多种新技术来生产亚微米粉末。在引起关注的产品中，纳米铝正在专业推进和放热最终用途中进行评估。本文考察了在现有铝粉行业中“纳米粉”生产的进展，现有的铝粉行业中最好的商业粉级粉的中值粒径约为6μm（比纳米粉粗1到2个数量级），而今天，这些粉尘为市场提供了纳米粉针对的是粗糙但有效的产品。纳米铝是否有真正的市场机会，如果有，将如何生产？一方面，有一种新颖的纳米粉末生产方法，该方法产量高，但通常速度慢且成本高，而另一方面，传统雾化路线中存在非常细的部分，产生的亚微米粉末产量非常低，但是可以转化为有意义的价格，作为批量生产的一部分。常规路线能否曾经希望以高成本效益的方式制造足够数量的纳米粉，并且将来会成为首选路线？此外，“超细”尺寸范围（约0.5-5μm）对于当今的粉末使用者而言具有更直接的潜在意义。本文力图找出应用小体积/高价值超细和纳米粉末的近期机会。

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