Crystallite-size dependency of the pressure and temperature response in nanoparticles of magnesia

Research Paper
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Abstract

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.

Keywords

Magnesia Bulk modulus Size-dependent Compressibility Thermal expansion Nanoparticle Lattice parameter 

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Copyright information

© Springer Science+Business Media B.V. 2017

Authors and Affiliations

  1. 1.Work carried out at the Chemistry Department and Applied Physics Applied Math Department of Columbia UniversityNew YorkUSA
  2. 2.New York University Abu DhabiAbu DhabiUnited Arab Emirates
  3. 3.Applied Physics Applied Math Department of Columbia UniversityNew YorkUSA

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