刚玉
勃姆石
材料科学
球磨机
纳米颗粒
纳米
化学工程
陶瓷
氧化物
铝
纳米技术
矿物学
冶金
复合材料
化学
工程类
作者
Amol P. Amrute,Zbigniew Łodziana,Hannah Schreyer,Claudia Weidenthaler,Ferdi Schüth
出处
期刊:Science
[American Association for the Advancement of Science (AAAS)]
日期:2019-10-24
卷期号:366 (6464): 485-489
被引量:148
标识
DOI:10.1126/science.aaw9377
摘要
Milling corundum nanoparticles High-purity corundum (α-Al 2 O 3 ) nanoparticles could enable applications such as more stable catalyst supports or precursors for high-strength ceramics. Milling of corundum only produces micrometer-scale particles, and direct synthesis from other aluminum oxides that would be likely starting materials, such as γ-Al 2 O 3 , fails because of the high activation barrier for converting the lattice structure of these cubic close-packed oxides. Amrute et al. show that ball milling of boehmite, γ-AlOOH, created ∼13-nanometer-diameter corundum nanoparticles of high purity through a mechanically induced dehydration reaction and by the effect of milling impacts on the surface energy of the particles. Science , this issue p. 485
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