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在亚纳米尺寸的化陶中观察稀土分离

Naoya Shibata1, Stephen J Pennycook, Tim R Gosnell

  • 1Condensed Matter Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.

Nature
|April 16, 2004
PubMed
概括

化 (Si3N4) 陶中的兰 (La) 补充剂优先分离到颗粒边界. 这种原子层次的理解使得设计更坚固,高性能Si3N4陶成为可能.

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Precipitation Gravimetry01:03

Precipitation Gravimetry

Precipitation gravimetry is based on converting an analyte into a sparingly soluble precipitate, which is separated by filtration and weighed. An ideal precipitate should be pure, insoluble, of known composition, and easily filtered from the reaction mixture.
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...