Combined structural refinement of Bi(sub 3.5)La(sub 0.5)Ti(sub 3)O(sub 12) using neutron and X-ray powder diffraction data

Article Abstract:

The precise structural parameters of Bi(sub 3.5)La(sub 0.5)TiO(sub 12), including lattice parameters, atomic positions, thermal parameters, and La occupancies were determined by a combined refinement using both X-ray and neutron powder diffraction data. The refinement results and spontaneous polarization calculation, concluded that the monoclinic model was more suitable than the orthorhombic model as a crystal system of Bi(sub 3.5)La(sub 0.5)Ti(sub 3)O(sub 12) at 298 K.

Primary nonferrous metals, not elsewhere classified, Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), Bismuth, Titanium compounds, Atomic properties

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Mechanism of corrosion inhibition of AA2024 by rare-earth compounds

Article Abstract:

The mechanism of corrosion protection of 2024-T3 aluminum alloy by cerium and lanthanum inhibitors in chloride media is investigated by means of dc polarization and local measurement methods. The proposed mechanisms of pitting corrosion and corrosion inhibition with rare earth (RE) salts are based on thermodynamic analysis.

Cerium & Compounds, Thermodynamics, Cerium

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Cation self-diffusion in LaCo[O.sub.3] and [La.sub.2]Co[O.sub.4] studied by diffusion coupled experiments

Article Abstract:

The reaction kinetics between dense, polycrystalline pellets of [La.sub.2][O.sub.3] and CoO are examined at different temperatures and pressures. The results have shown a correlation between diffusion of the B cation and the melting point for LnB[O.sub.3] materials.

Cobalt Compounds, Oxides, Diffusion, Diffusion (Physics), Report

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