Elasticity of MgO and a primary pressure scale to 55 GPa
AUTOR(ES)
Zha, Chang-Sheng
FONTE
The National Academy of Sciences
RESUMO
We have studied the elasticity and pressure–density equation of state of MgO in diamond cells to 55 GPa and have doubled the previous pressure limit of accurate elasticity determinations for crystals. Integrating single-crystal velocity data from Brillouin scattering measurements and density data from polycrystalline x-ray diffraction, we obtained the three principal elastic tensor elements (C11, C12, and C44) and various secondary elasticity parameters, including single-crystal elastic anisotropy, Cauchy relation, aggregate sound velocities, and Poisson's ratio, as functions of pressure. The present study also provides a direct determination of pressure without recourse to any prior pressure standard, thus creating a primary pressure scale. The commonly used ruby fluorescence pressure scale has thus been improved to 1% accuracy by the new MgO scale.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=17603Documentos Relacionados
- MgO nanoparticles as antibacterial agent: preparation and activity
- Nanosize MgO as antibacterial agent: preparation and characteristics
- Compósitos à base de Al2O3, com adições de NbC e de MgO
- Formation of Aluminum Titanate with Small Additions of MgO and SiO2
- MgO Saturation Analisys of CaO-SiO2-FeO-MgO-Al2O3 Slag System