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

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.

Authors:
;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1375341
Resource Type:
Journal Article
Journal Name:
Journal of Nanoparticle Research
Additional Journal Information:
Journal Volume: 19; Journal Issue: 7; Journal ID: ISSN 1388-0764
Publisher:
Tsinghua University Press
Country of Publication:
United States
Language:
ENGLISH
Subject:
36 MATERIALS SCIENCE; magnesia; bulk modulus; size dependent; compressibility; thermal expansion; nanoparticle; lattice parameter

Citation Formats

Rodenbough, Philip P., and Chan, Siu-Wai. Crystallite-size dependency of the pressure and temperature response in nanoparticles of magnesia. United States: N. p., 2017. Web. doi:10.1007/s11051-017-3922-7.
Rodenbough, Philip P., & Chan, Siu-Wai. Crystallite-size dependency of the pressure and temperature response in nanoparticles of magnesia. United States. doi:10.1007/s11051-017-3922-7.
Rodenbough, Philip P., and Chan, Siu-Wai. Sat . "Crystallite-size dependency of the pressure and temperature response in nanoparticles of magnesia". United States. doi:10.1007/s11051-017-3922-7.
@article{osti_1375341,
title = {Crystallite-size dependency of the pressure and temperature response in nanoparticles of magnesia},
author = {Rodenbough, Philip P. and Chan, Siu-Wai},
abstractNote = {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.},
doi = {10.1007/s11051-017-3922-7},
journal = {Journal of Nanoparticle Research},
issn = {1388-0764},
number = 7,
volume = 19,
place = {United States},
year = {2017},
month = {7}
}

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