Artículos de revistas
Diamond Thermal Expansion Measurement Using Transmitted X-ray Back-diffraction.
Registro en:
Journal Of Synchrotron Radiation. v. 12, n. Pt 3, p. 349-53, 2005-May.
0909-0495
10.1107/S0909049505003432
15840921
Autor
Giles, Carlos
Adriano, Cris
Lubambo, Adriana Freire
Cusatis, Cesar
Mazzaro, Irineu
Hönnicke, Marcelo Goncalves
Institución
Resumen
The linear thermal expansion coefficient of diamond has been measured using forward-diffracted profiles in X-ray backscattering. This experimental technique is presented as an alternative way of measuring thermal expansion coefficients of solids in the high-resolution Bragg backscattering geometry without the intrinsic difficulty of detecting the reflected beam. The temperature dependence of the lattice parameter is obtained from the high sensitivity of the transmitted profiles to the Bragg angle variation with temperature. The large angular width of the backscattering profiles allows the application of this technique to mosaic crystals with high resolution. As an application of this technique the thermal expansion coefficient of a synthetic type-Ib diamond (110) single crystal was measured from 10 to 300 K. Extremely low values (of the order of 1 x 10(-7) +/- 5 x 10(-7)) for the linear thermal expansion coefficient in the temperature range from 30 to 90 K are in good agreement with other reported measurements. 12 349-53