Density of Superheated and Undercooled Liquid Alumina by a Contactless Method
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The density of liquid alumina drops maintained in levitation with an aerodynamic device and heated with CO2 lasers is determined by analysis of high-speed video digital images between 2000 and 3100 K in various gases. It is shown that consistent results can be achieved for the lighter drops (m<100 mg) which do not depend on the nature of the gas. Experiments performed with lasers impinging the drop surface or during free cooling of the preheated drop gave similar results. The density is represented by the following expression: d=(2.79±0.01)(l−α(T−2500)) g·cm−3, where α=(4.22 ±0.14) × 10−5K−1.
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- Density of Superheated and Undercooled Liquid Alumina by a Contactless Method
International Journal of Thermophysics
Volume 20, Issue 4 , pp 1085-1094
- Cover Date
- Print ISSN
- Online ISSN
- Kluwer Academic Publishers-Plenum Publishers
- Additional Links
- contactless techniques
- high-speed digital video
- high temperatures
- laser heating
- liquid alumina
- Industry Sectors