Dehydration of brucite

Garn, Paul D.; Kawalec, B.; Chang, Jemei

doi:10.1016/0040-6031(78)80081-1

Cited by 16 publications

(3 citation statements)

References 14 publications

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“…Diehm suggested that the main reason for lattice expansion in magnesium oxide can be attributed to the formation of Mg(OH) 2 at the surface, as a result of adsorption of water vaporation in air, which is not unreasonable because the formation of Mg(OH) 2 at the surface of MgO is well-documented. 5,53,54 Furthermore, Liu's lattice expansion of nanomagnesia happened with the surface adsorption of Mg (OH) 2 and the molecular infrared absorption peak was directly observed by IR spectroscopy. 55 It should be noted that many of the theories that explain variable lattice parameter assume a constant bulk modulus.…”

Section: Discussionmentioning

confidence: 99%

“…The nanoparticles of MgO prepared in low partial pressure of oxygen environment such as under vacuum (10 −5 torr) showed lattice contraction, while nanoparticles of MgO prepared by decomposition in air showed lattice expansion. Diehm suggested that the main reason for lattice expansion in magnesium oxide can be attributed to the formation of Mg(OH) 2 at the surface, as a result of adsorption of water vaporation in air, which is not unreasonable because the formation of Mg(OH) 2 at the surface of MgO is well‐documented . Furthermore, Liu's lattice expansion of nano‐magnesia happened with the surface adsorption of Mg(OH) 2 and the molecular infrared absorption peak was directly observed by IR spectroscopy…”

Section: Discussionmentioning

confidence: 99%

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Lattice Expansion in Metal Oxide Nanoparticles: MgO, Co₃O₄, & Fe₃O₄

et al. 2016

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Uniform sets of mono‐crystalline nanoparticles ranging from 6 nm to over 100 nm were prepared for the MgO, Co3O4, and Fe3O4 oxide systems. The nanoparticles were characterized by transmission electron microscopy (TEM) and x‐ray diffraction (XRD). A careful analysis shows increased lattice parameter for smaller nanoparticles of each oxide system: 0.47% expansion from bulk for 7 nm MgO crystallites, 0.15% expansion from bulk for 9 nm Co3O4 crystallites, and 0.13% expansion from bulk for 6 nm Fe3O4 crystallites. The compressive surface stresses and expansion energies against hydrostatic pressure for each oxide system were calculated, respectively, to be 4.13 N/m and 1.8 meV/formula unit for MgO, 3.09 N/m and 0.87 meV/formula unit for Co3O4, and 1.26 N/m and 0.67 meV/formula unit for Fe3O4. The fundamental understanding of oxide nanoparticle mechanics as presented here will facilitate integration of these materials into technological applications in a rationally designed manner.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Lattice Expansion in Metal Oxide Nanoparticles: MgO, Co₃O₄, & Fe₃O₄

et al. 2016

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“…It is confirmed that a fraction of hydrogen in the brucite lattice is diffusible even at 230 K, although this is $400 K lower than the dehydration temperature (Garn et al, 1978;Shand, 2006) Table 1 Summary of parameters of hydrogen transport processes in brucite.…”

Section: Discussionmentioning

confidence: 93%