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Related Experiment Videos

Diamond thermal expansion measurement using transmitted X-ray back-diffraction.

Carlos Giles1, Cris Adriano, Adriana Freire Lubambo

  • 1Instituto de Física, Universidade Estadual de Campinas, SP, Brazil. giles@ifi.unicamp.br

Journal of Synchrotron Radiation
|April 21, 2005
PubMed
Summary

This study introduces a novel X-ray backscattering technique for measuring the linear thermal expansion coefficient of solids. The method accurately determined diamond

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Area of Science:

  • Materials Science
  • Solid-State Physics
  • Crystallography

Background:

  • Accurate measurement of thermal expansion coefficients is crucial for understanding material properties under varying temperatures.
  • Traditional methods for measuring thermal expansion can be complex, especially in high-resolution Bragg backscattering geometries.

Purpose of the Study:

  • To present and validate a novel experimental technique for measuring linear thermal expansion coefficients using X-ray backscattering.
  • To determine the temperature dependence of the lattice parameter and thermal expansion coefficient of synthetic diamond.

Main Methods:

  • Utilized forward-diffracted profiles in X-ray backscattering geometry.
  • Employed high-sensitivity transmitted profiles to detect Bragg angle variations with temperature.

Related Experiment Videos

  • Applied the technique to a synthetic type-Ib diamond (110) single crystal from 10 to 300 K.

    • Main Results:

    • Successfully measured the linear thermal expansion coefficient of diamond.
    • Observed extremely low values for the linear thermal expansion coefficient of diamond between 30 and 90 K.
    • Results are in good agreement with previously reported measurements for diamond.

    Conclusions:

    • The presented X-ray backscattering technique offers a viable alternative for measuring thermal expansion coefficients of solids.
    • The technique is suitable for mosaic crystals and high-resolution measurements.
    • The study provides accurate thermal expansion data for synthetic diamond in a wide temperature range.