| 1 | However, it is impossible to avoid a very thin layer of 1 nanometre of aluminium oxide 'leaking' in certain spots. | |
| 2 | As China's largest producer of the metal tries to stabilise prices and cut costs, it has reduced its aluminium capacity by 18% and alumina by 10%. | |
| 3 | These are tiny pieces of a superconducting material consisting of a niobium film on an aluminium oxide wafer with gaps etched into it. | |
| 4 | Darker soils are often rich in iron and aluminum oxides, and are typical of highly weathered soil that forms in hot, humid climates. | |
| 5 | Methods outlined in the monograph include: use of crushed clay pots, bone charcoal, contact precipitation, or use of activated alumina (absorptive filter). |
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