Reactivity of Aluminum and Titanium Oxides under the Conditions of the Synthesis of Strontium and Barium Titanates in Water Fluid Media

2020 ◽  
Vol 14 (8) ◽  
pp. 1252-1259
Author(s):  
E. A. Lagunova ◽  
Yu. D. Ivakin ◽  
M. Yu. Sinev ◽  
D. P. Shashkin ◽  
Yu. A. Gordienko ◽  
...  
Keyword(s):  
Titanium Oxides ◽  
Barium Titanates ◽  
Fluid Media

scholarly journals Carbothermic Reduction and Nitridation Mechanism of Vanadium-Bearing Titanomagnetite Concentrate

Minerals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 730
Author(s):  
Wen Yu ◽  
Xiaojin Wen ◽  
Wei Liu ◽  
Jiangan Chen
Keyword(s):  
Phase Transformation ◽  
Carbothermic Reduction ◽  
Titanium Oxides ◽  
Distribution Characteristic ◽  
Reaction Behavior ◽  
Microstructure Transformation ◽  
Rate Limiting Step ◽  
Limiting Step ◽  
Roasting Process ◽  
Rate Limiting

In this study, the carbothermic reduction and nitridation mechanism of vanadium-bearing titanomagnetite concentrate are investigated in terms of phase transformation, microstructure transformation, and thermodynamic analyses. The differences in the reaction behavior of titanomagnetite and ilmenite in vanadium-bearing titanomagnetite concentrate, as well as the distribution characteristic of V in the roasted products, are emphatically studied. It is observed that the reaction sequences of titanomagnetite and ilmenite transformations into nitride are as follows: Fe3−xTixO4→Fe2TiO4→FeTiO3→M3O5→(Ti, V)(N, C); FeTiO3→M3O5→Ti(N, C). The reduction of M3O5 to TiN is the rate-limiting step of the entire reaction, and metal iron is an important medium for transferring C for the reduction of M3O5. Titanomagnetite is faster to convert into nitride than ilmenite is, and the reasons for this are discussed in detail. During the entire roasting process, V mainly coexists with Ti and seems to facilitate the conversion of titanium oxides into (Ti, V)(N, C).

scholarly journals From Slater to Mott physics by epitaxially engineering electronic correlations in oxide interfaces

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Carla Lupo ◽  
Evan Sheridan ◽  
Edoardo Fertitta ◽  
David Dubbink ◽  
Chris J. Pickard ◽  
...  
Keyword(s):  
Phase Diagram ◽  
High Pressure ◽  
Charge Transfer ◽  
Lower Mantle ◽  
Random Structure ◽  
Titanium Oxides ◽  
Oxide Interfaces ◽  
Electronic Correlations ◽  
Epitaxial Strain ◽  
Magnetic Switching

AbstractUsing spin-assisted ab initio random structure searches, we explore an exhaustive quantum phase diagram of archetypal interfaced Mott insulators, i.e. lanthanum-iron and lanthanum-titanium oxides. In particular, we report that the charge transfer induced by the interfacial electronic reconstruction stabilises a high-spin ferrous Fe2+ state. We provide a pathway to control the strength of correlation in this electronic state by tuning the epitaxial strain, yielding a manifold of quantum electronic phases, i.e. Mott-Hubbard, charge transfer and Slater insulating states. Furthermore, we report that the electronic correlations are closely related to the structural oxygen octahedral rotations, whose control is able to stabilise the low-spin state of Fe2+ at low pressure previously observed only under the extreme high pressure conditions in the Earth’s lower mantle. Thus, we provide avenues for magnetic switching via THz radiations which have crucial implications for next generation of spintronics technologies.

Modifying of microstructure and toughness in the weld metal prepared by welding wire containing nanosized titanium oxides

2021 ◽  
Vol 807 ◽  
pp. 140897
Author(s):  
Xiang Luo ◽  
Zidong Wang ◽  
Xiaohua Chen ◽  
Yanlin Wang ◽  
Guang Xu
Keyword(s):  
Weld Metal ◽  
Titanium Oxides ◽  
Welding Wire

Strong molecular alignment in anisotropic fluid media

1996 ◽  
Vol 260 (3-4) ◽  
pp. 441-446 ◽  
Author(s):  
A.J. Bain ◽  
P. Chandna ◽  
G. Butcher
Keyword(s):  
Molecular Alignment ◽  
Anisotropic Fluid ◽  
Fluid Media

Ti and O K edges for titanium oxides by multiple scattering calculations: Comparison to XAS and EELS spectra

1997 ◽  
Vol 55 (16) ◽  
pp. 10382-10391 ◽  
Author(s):  
Z. Y. Wu ◽  
G. Ouvrard ◽  
P. Gressier ◽  
C. R. Natoli
Keyword(s):  
Multiple Scattering ◽  
Titanium Oxides

scholarly journals AN AUTOMATIC DELIVERY APPARATUS FOR FLUID MEDIA.

The Lancet ◽  
1916 ◽  
Vol 188 (4860) ◽  
pp. 716-717
Author(s):  
SydneyW. Cole
Keyword(s):  
Fluid Media

Reduction in the Thermal Conductivity of Thermoelectric Titanium Oxide by Introduction of Planar Defects

2009 ◽  
Vol 1218 ◽  
Author(s):  
Shunta Harada ◽  
Katsushi Tanaka ◽  
Haruyuki Inui
Keyword(s):  
Thermal Conductivity ◽  
Titanium Oxide ◽  
Hot Pressing ◽  
Oxygen Deficiency ◽  
Nominal Composition ◽  
Titanium Oxides ◽  
X Ray Diffraction ◽  
Planar Defects ◽  
Magnéli Phase ◽  
Magneli Phase

AbstractThermoelectric properties of a homologous series of Magnéli phase titanium oxides TinO2n-1 (n = 2, 3..) have been investigated. Dense polycrystalline specimens with nominal composition of TiO2-x (x = 0.10, 0.20) have been prepared by conventional hot-pressing. X-ray diffraction analysis has revealed that prepared specimens are slightly reduced during hot-pressing. Electrical conduction is of n-type for all prepared titanium oxides and electrical resistivity and absolute values of Seebeck coefficient decrease with increasing oxygen deficiency. The carrier concentration of Magnéli phase titanium oxide increases with increasing oxygen deficiency. Lattice thermal conductivity decreases with increasing oxygen deficiency by more than 60% at room temperature and 40% at 773K compared to TiO2, which can be due to the presence of dense planar defects. The largest thermoelectric figure of merit Z, 1.6×10-4 K-1 at 773K, was obtained in TiO1.90 hot pressed specimen.

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