Crystallite-size dependency of the pressure and temperature response in nanoparticles of magnesia
- 149 Downloads
We have carefully measured the hydrostatic compressibility and thermal expansion for a series of magnesia nanoparticles. We found a strong variance in these mechanical properties as crystallite size changed. For decreasing crystallite sizes, bulk modulus first increased, then reached a modest maximum of 165 GPa at an intermediate crystallite size of 14 nm, and then decreased thereafter to 77 GPa at 9 nm. Thermal expansion, meanwhile, decreased continuously to 70% of bulk value at 9 nm. These results are consistent to nano-ceria and together provide important insights into the thermal-mechanical structural properties of oxide nanoparticles.
KeywordsMagnesia Bulk modulus Size-dependent Compressibility Thermal expansion Nanoparticle Lattice parameter
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
- Angel RJ, Alvaro M, Gonzalez-Platas J (2014) EosFit7c and a Fortran module (library) for equation of state calculations. Zeitschrift für Krist—Cryst Mater. 229(5)Google Scholar
- Marquardt H, Speziale S, Marquardt K, Reichmann HJ, Konôpková Z, Morgenroth W, Liermann HP (2011) The effect of crystallite size and stress condition on the equation of state of nanocrystalline MgO. J Appl Phys 110(11)Google Scholar
- Rodenbough PP (2016) Crystallite size dependency of the pressure and temperature response in nanoparticles of ceria and other oxides. Columbia University, PhD dissertationGoogle Scholar
- Rodenbough PP, Zheng C, Liu Y, Hui C, Xia Y, Ran Z, Hu Y, Chan S-W (2016) Lattice expansion in metal oxide nanoparticles: MgO, Co3O4, and Fe3O4. J Am Ceram SocGoogle Scholar
- Zvoriste-Walters, C. E.; Heathman, S.; Jovani-Abril, R.; Spino, J. L.; Janssen, A.; Caciuffo, R. Crystal size effect on the compressibility of nano-crystalline uranium dioxide. J Nucl Mater 2013, 435 (1–3), 123–127.Google Scholar