搜索结果: 1-15 共查到“知识库 理学 perovskite”相关记录18条 . 查询时间(0.046 秒)
Influence of the Ringwoodite-Perovskite transition on mantle convection in spherical geometry as a function of Clapeyron slope and Rayleigh number
Ringwoodite-Perovskite transition mantle convection spherical geometry Clapeyron slope Rayleigh number
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2014/12/31
We investigate the influence on mantle convection of the negative Clapeyron slope ringwoodite to perovskite and ferro-periclase mantle phase transition, which is correlated with the seismic discontinu...
The MgSiO3 system at high pressure: Thermodynamic properties of perovskite, postperovskite, and melt from global inversion of shock and static compression data
perovskite postperovskite melt
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2014/4/8
We present new equation-of-state (EoS) data acquired by shock loading to pressures
up to 245 GPa on both low-density samples (MgSiO3
glass) and high-density,
Multiferroic phase competitions in perovskite manganite thin films
Multiferroic phase competitions perovskite manganite thin films
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2016/12/2
Based on the Mochizuki- Furukawa model, the cycloid al spin structures of orthorh ombic RMnO3 manganite thin films on various magnetic substrates are simulated using Monte Carlo method. It is revealed...
Elastic Tensor and Thermodynamic Property of Magnesium Silicate Perovskite from First-principles Calculations
Thermodynamic property Elastic property MgSiO3 perovskite
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2012/4/5
The thermodynamic and elastic properties of magnesium silicate (MgSiO3) perovskite at high pressure are investigated with the quasi-harmonic Debye model and the first-principles method based on the de...
NaIrO3 - a pentavalent post-perovskite
Post-perovskite NaIrO3 high oxidation state high pressure synthesis Rietveld refinement
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2010/11/25
Sodium iridium(V) oxide, NaIrO3, was synthesized by a high pressure solid state method and recovered to ambient conditions. It is found to be isostructural with CaIrO3, the much-studied structural ana...
Direct shock wave loading of Stishovite to 235 GPa: Implications for perovskite stability relative to an oxide assemblage at lower mantle conditions
perovskite stability ower mantle conditions Direct shock
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2014/4/8
Pure stishovite and coesite samples with zero porosity
and dimensions appropriate for planar shock wave
experiments have been synthesized with multi-anvil highpressure techniques. The equation of st...
Equation of state of MgSiO3 with the perovskite structure based on experimental measurements
MgSiO3 experimental measurement perovskite structure
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2012/3/30
WestudiedMgSiO withtheperovskitestructureheatedtotemperaturesupto1500K3
atpressuresbetween36and110GPawithin-situX-raydiffraction.Thenewpressure-
volume-temperature(P-V-T)datawerecombinedwithliteratu...
Shifts in thermal expansivity with Fe content for solid solutions of MgSiO3-FeSiO3 with the perovskite structure
MgSiO3-FeSiO3 perovskite structure
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2012/3/30
ThisstudypresentsevidencethatforasolidsolutionofMgFe SiO perovskite,the
x x-1 3
shiftinvolumethermalexpansivity,,issmallastheindex x ischanged.Accordingto
dataobtainedtheoreticallybyHamaandSuito(19...
High-resolution synchrotron X-ray powder diffraction and Rietveld structure refinement of two (Mg0.95,Fe0.05)SiO3 perovskite samples synthesized under different oxygen fugacity conditions
high-resolution synchrotron X-ray powder diffraction
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2012/3/30
Thispaperpresentshigh-resolutionsynchrotronX-raypowderdiffractiondataat290K
ontwoFe-bearing,polycrystallinesilicateperovskitesampleswithapproximatecompo-
Fe )SiO synthesizedat25GPaand1920Kinamulti-a...
Calculated role of aluminum in the incorporation of ferric iron into magnesium silicate perovskite
Calculated role aluminum incorporation ferric iron magnesium silicate perovskite
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2012/4/1
An atomistic computer simulation study was undertaken to address the role of Al in the substitution of ferric iron into magnesium silicate perovskite, MgSiO
3. Calculated substi-tution and vacancy en...
Molecular dynamics simulations of phase transitions and melting in perovskite MgSiO3 at mantle pressures
Molecular dynamics simulations phase transitions MgSiO3
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2012/4/1
The high pressure phase transitions and melting of the mantle mineral MgSiO3 with the perovskite structure were investigated using molecular dynamics (MD) simulations of a large system of atoms on a p...
Thermoelastic properties of MgSiO3 perovskite as the Debye approach
Thermoelastic properties MgSiO3 perovskite
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2012/3/30
MgSiO 3 perovskite is shown to be a Debye-like mineral by the determination of specific heat, CV, entropy, S, and thermal pressure, D P Th, using the Debye theory up to 1800 K.Sound velocities and bul...
Domain Structures of Epitaxial Perovskite Ferroelectric Films: Part II. Applications
Domain Structures Epitaxial Perovskite Ferroelectric Films
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2010/4/19
The use of domain stability maps for epitaxial perovskite ferroelectric films is illustrated with some examples. The equilibrium domain structure and domain fractions as a function of temperature are ...
Domain Structures of Epitaxial Perovskite Ferroelectric Films: Part I. Theory
Domain Structures Epitaxial Perovskite Ferroelectric Films
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2010/4/19
Possible equilibrium domain structures due to elastic interactions between the film and the substrate as a result of a cubic-tetragonal transformation observed in epitaxial perovskite ferroelectric fi...
Rietveld refinement of Ca2TiSiO6 perovskite
Rietveld refinement Ca2TiSiO6 perovskite
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2012/4/5
Thestructureofthehigh-pressurecubicdoubleperovskiteCa TiSiO wasre?nedusingsynchrotronX-raypowderdata[S.G. Fm3m,a 7.4105(1)A, Z 4].TiandSiarefullyorderedintoalternatingoctahedraintheperovskiteframework...