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Updated: Jul 4, 2025

Niobium Oxide Films Deposited by Reactive Sputtering: Effect of Oxygen Flow Rate
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Niobium Oxide Films Deposited by Reactive Sputtering: Effect of Oxygen Flow Rate

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在氧化物中的负热膨胀的混合离子控制

Eliza K Dempsey1,2, James Cumby1,2

  • 1School of Chemistry, University of Edinburgh, David Brewster Road, Edinburgh, EH9 3FJ, UK. james.cumby@ed.ac.uk.

Chemical communications (Cambridge, England)
|February 9, 2024
PubMed
概括

研究人员发现,改变氧化中的离子组成,NbO2-Fx,显著改变其热膨胀. 兴奋剂诱导热膨胀从正向负的转变,使新的低膨胀材料成为可能.

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Thermal expansion and Thermal stress: Problem Solving01:27

Thermal expansion and Thermal stress: Problem Solving

San Francisco's Golden Gate Bridge is exposed to temperatures ranging from -15 °C to 40 °C. At its coldest, the main span of the bridge is 1275 m long. Assuming that the bridge is made entirely of steel, what is the change in its length between these temperatures?
To solve the problem, first, identify the known and unknown quantities. The initial length (L) of the bridge is 1275 m, the coefficient of linear expansion (α) for steel is 12 x 10-6/°C, and the change in...
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