High-temperature elasticity of magnesioferrite spinel

Elasticity of CaSiO3 perovskite at high pressure and high temperature

Ab initio molecular dynamic (AIMD) simulations were performed to calculate the equation of state (EOS) of CaSiO3 perovskite at mantle pressure–temperature conditions. At temperatures above 2000 K, even though the hydrostatic crystal structure is metrically tetragonal in the pressure range of 13–123 GPa, the symmetry of the elastic moduli is consistent with cubic symmetry. Our results show that ...

Compressional and shear wave velocities of Fe2SiO4 spinel at high pressure and high temperature

LOW TEMPERATURE SYNTHESIS OF NANOCRYSTALLINE MgAl2O4 SPINEL VIA SUCROSE PROCESS

Abstract: Nanocrystalline MgAl2O4 spinel powder was synthesized using metal nitrates and a polymer matrix-based composed of sucrose and polyvinyl alcohol (PVA). The precursor and the calcined powders were characterized by simultaneous thermal analysis (STA), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and scanning electron microscopy (SEM). According to XRD res...

PLANAR, IMPEDANCE- METRIC NOx SENSOR WITH SPINEL- TYPE SE FOR HIGH TEMPERATURE APPLICATIONS

This study displays the results obtained with a planar, impedancemetric sensor having a NiCr2O4SE and a specially manufactured FSZ electrolyte. The sensing characteristics to NO and to O2/NO-gas mixtures were analyzed at temperatures up to 700 °C. The cross-selectivity to other flue-gases was tested. As a new capable type of sensing parameter the total impedance was applied.

T.E.M. investigations of room temperature microplasticity in MgAl2O 4 spinel

2014 Dislocations produced by room temperature Vickers indentation on a single crystal of MgO.1.1 Al2O3 spinel have been characterized by T.E.M. These dislocations belong to 1/2 110 > { 111 } glide systems. No trace of { 100 } nor { 110 } glide is found. Moreover these dislocations show no preferred orientation nor visible dissociation. However after annealing for 1 day at 1 000 °C, dissoc...