Density measurement of molten silicon by a pycnometric method

Y. Sato, T. Nishizuka, K. Hara, T. Yamamura, Y. Waseda

研究成果: Article

33 引用 (Scopus)

抜粋

The density of molten silicon was measured using a newly developed pycnometer made of boron nitride. The present method has many advantages for measuring the density of molten silicon, which has a high temperature and can be easily oxidized. The pycnometer was precisely machined, and its volume at high temperatures was acculately determined. The procedure to overflow the excess melt was carried out in a closed apparatus under a helium atmosphere. A special procedure was introduced to avoid the error generated by the volume expansion of silicon when it solidified. The total uncertainty of the measurement was estimated to be within 0.5%. The measured density showed a linear relationship with respect to temperature and agreed well with literature values. The expansion coefficient of molten silicon was similar to those of typical molten metals in spite of the low expansion coefficient of solid silicon. This suggested that the structural change of molten silicon was similar to those of typical metals.

元の言語English
ページ(範囲)1463-1471
ページ数9
ジャーナルInternational Journal of Thermophysics
21
発行部数6
DOI
出版物ステータスPublished - 2000 11 1

ASJC Scopus subject areas

  • Condensed Matter Physics

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  • これを引用

    Sato, Y., Nishizuka, T., Hara, K., Yamamura, T., & Waseda, Y. (2000). Density measurement of molten silicon by a pycnometric method. International Journal of Thermophysics, 21(6), 1463-1471. https://doi.org/10.1023/A:1006661511770