A New Technique to Measure the Viscosity and Density of Silicate Melts at High Pressure

  1. Murli H. Manghnani and
  2. Yasuhiko Syono
  1. M. Kanzaki1,
  2. K. Kurita1,
  3. T. Fujii2,
  4. T. Kato3,
  5. O. Shimomura4 and
  6. S. Akimoto5

Published Online: 21 MAR 2013

DOI: 10.1029/GM039p0195

High-Pressure Research in Mineral Physics: A Volume in Honor of Syun-iti Akimoto

High-Pressure Research in Mineral Physics: A Volume in Honor of Syun-iti Akimoto

How to Cite

Kanzaki, M., Kurita, K., Fujii, T., Kato, T., Shimomura, O. and Akimoto, S. (1987) A New Technique to Measure the Viscosity and Density of Silicate Melts at High Pressure, in High-Pressure Research in Mineral Physics: A Volume in Honor of Syun-iti Akimoto (eds M. H. Manghnani and Y. Syono), American Geophysical Union, Washington, D. C.. doi: 10.1029/GM039p0195

Author Information

  1. 1

    Geophysical Institute, University of Tokyo, Tokyo, Japan

  2. 2

    Earthquake Research Institute, University of Tokyo, Tokyo, Japan

  3. 3

    Department of Earth Science, Nagoya University, Nagoya, Japan

  4. 4

    National Institute for Research in Inorganic Materials, Sakura, Ibaraki, Japan

  5. 5

    Institute for Solid State Physics, University of Tokyo, Tokyo, Japan

Publication History

  1. Published Online: 21 MAR 2013
  2. Published Print: 1 JAN 1987

ISBN Information

Print ISBN: 9780875900667

Online ISBN: 9781118664124

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Keywords:

  • Mineralogy and Crystal Chemistry;
  • Phase transformations;
  • High Pressure-High Temperature Research

Summary

A new method to measure viscosity and density of silicate melts at high pressure has been developed. With this method, the movement of the spheres falling within silicate melts that are contained in a high-pressure apparatus can be monitored in real time through an X-ray shadowgraph, and the settling velocity can be measured without quenching the charge. Because of the difference between the X-ray absorption coefficients of metal spheres and silicate melts, the image of the falling spheres can be clearly traced through an X-ray TV camera. The experiment was conducted with high-pressure and high-temperature apparatus (MAX80) using synchrotron radiation. The high intensity and the parallelism of the X-rays of synchrotron radiation and of the high-resolution Saticon X-ray TV camera allow accurate measurement of the falling velocity of the spheres, even for melts with low viscosity. With the present method, the measurable range of viscosity can be extended down to 10−3 Pa s. Because of the multianvil type of high-pressure apparatus used, the experimental range of pressure can be extended up to 10 GPa.