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Compressibility and thermal expansion of cubic silicon nitride

Jiang, J. Z.; Lindelov, H.; Gerward, L.; Ståhl, K.; Recio, J. M.; Mori-Sanchez, P.; Carlson, S. LU ; Mezouar, M.; Dooryhee, E. and Fitch, A., et al. (2002) In Physical Review B (Condensed Matter) 65(16). p.1612021-1612024
Abstract

The compressibility and thermal expansion of the cubic silicon nitride (c-Si3N4) phase have been investigated by performing in situ x-ray powder-diffraction measurements using synchrotron radiation, complemented with computer simulations by means of first-principles calculations. The bulk compressibility of the c-Si3N4 phase originates from the average of both Si-N tetrahedral and octahedral compressibilities where the octahedral polyhedra are less compressible than the tetrahedral ones. The origin of the unit cell expansion is revealed to be due to the increase of the octahedral Si-N and N-N bond lengths with temperature, while the lengths for the tetrahedral Si-N and N-N bonds remain almost... (More)

The compressibility and thermal expansion of the cubic silicon nitride (c-Si3N4) phase have been investigated by performing in situ x-ray powder-diffraction measurements using synchrotron radiation, complemented with computer simulations by means of first-principles calculations. The bulk compressibility of the c-Si3N4 phase originates from the average of both Si-N tetrahedral and octahedral compressibilities where the octahedral polyhedra are less compressible than the tetrahedral ones. The origin of the unit cell expansion is revealed to be due to the increase of the octahedral Si-N and N-N bond lengths with temperature, while the lengths for the tetrahedral Si-N and N-N bonds remain almost unchanged in the temperature range 295-1075 K.

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Contribution to journal
publication status
published
in
Physical Review B (Condensed Matter)
volume
65
issue
16
pages
4 pages
publisher
American Physical Society
external identifiers
  • Scopus:0037091634
ISSN
0163-1829
language
English
LU publication?
yes
id
afa9bfb0-ebcb-4a07-9fbc-b36b498ef7ff
date added to LUP
2016-05-04 12:41:47
date last changed
2016-12-04 04:51:04
@misc{afa9bfb0-ebcb-4a07-9fbc-b36b498ef7ff,
  abstract     = {<p>The compressibility and thermal expansion of the cubic silicon nitride (c-Si<sub>3</sub>N<sub>4</sub>) phase have been investigated by performing in situ x-ray powder-diffraction measurements using synchrotron radiation, complemented with computer simulations by means of first-principles calculations. The bulk compressibility of the c-Si<sub>3</sub>N<sub>4</sub> phase originates from the average of both Si-N tetrahedral and octahedral compressibilities where the octahedral polyhedra are less compressible than the tetrahedral ones. The origin of the unit cell expansion is revealed to be due to the increase of the octahedral Si-N and N-N bond lengths with temperature, while the lengths for the tetrahedral Si-N and N-N bonds remain almost unchanged in the temperature range 295-1075 K.</p>},
  author       = {Jiang, J. Z. and Lindelov, H. and Gerward, L. and Ståhl, K. and Recio, J. M. and Mori-Sanchez, P. and Carlson, S. and Mezouar, M. and Dooryhee, E. and Fitch, A. and Frost, D. J.},
  issn         = {0163-1829},
  language     = {eng},
  month        = {04},
  number       = {16},
  pages        = {1612021--1612024},
  publisher    = {ARRAY(0x6bfb330)},
  series       = {Physical Review B (Condensed Matter)},
  title        = {Compressibility and thermal expansion of cubic silicon nitride},
  volume       = {65},
  year         = {2002},
}