Determination of the solid-solution region of infinite-layer compound (SrxCa1−xCuO2 under ambient pressure by X-ray diffraction

1996 ◽  
Vol 264 (1-2) ◽  
pp. 19-21 ◽  
Author(s):  
J. Zhao ◽  
C. Dong ◽  
Y.K. Fan ◽  
F. Wu ◽  
H. Chen ◽  
...  
Keyword(s):  
Solid Solution ◽  
Ambient Pressure ◽  
X Ray Diffraction ◽  
Layer Compound ◽  
X Ray ◽  
Infinite Layer ◽  
Solid Solution Region ◽  
Solution Region

Re-investigation of the structure and crystal chemistry of the Bi2O3–W2O6 `type (Ib)' solid solution using single-crystal neutron and synchrotron X-ray diffraction

2010 ◽  
Vol 66 (2) ◽  
pp. 165-172 ◽  
Author(s):  
Neeraj Sharma ◽  
Rene B. Macquart ◽  
Maxim Avdeev ◽  
Mogens Christensen ◽  
Garry J. McIntyre ◽  
...  
Keyword(s):  
Solid Solution ◽  
Single Crystal ◽  
X Ray Diffraction ◽  
Cation Site ◽  
X Ray ◽  
Oxide Ion Conductivity ◽  
Solid Solution Region ◽  
Solution Region ◽  
First Time ◽  
Oxide Ion

Single crystals of composition Bi35.66W4.34O66.51 (or Bi8.2WO15.3, bismuth tungsten oxide), within the type (Ib) solid-solution region of the Bi2O3–WO3 system, were synthesized using the floating-zone furnace method. Synchrotron X-ray and neutron single-crystal diffraction data were used to confirm the previously tentative assignment of the room-temperature space group as I41. Fourier analysis of the combined X-ray and neutron datasets was used to elucidate and refine fully the cation and anion arrays for the first time. The mixed cation site M1 is shown to be coordinated by eight O atoms in an irregular cube when M = Bi, and by six O atoms in an octahedron when M = W. The resulting disorder in the average structure around M1 is discussed in the context of experimentally observed oxide-ion conductivity.

Microstructure and polarization behavior of Ni/WC+GO (graphene oxide) composite cladding fusion coating

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Ouyang Li ◽  
Guirong Yang ◽  
Wenming Song ◽  
Dawen Gao ◽  
Xianming Sun
Keyword(s):  
Solid Solution ◽  
Graphene Oxide ◽  
Steel Substrate ◽  
Composite Coatings ◽  
Corrosion Current ◽  
X Ray Diffraction ◽  
X Ray ◽  
Solid Solution Region ◽  
Polarization Characteristics ◽  
Solution Region

Abstract Ni/WC/graphene oxide (GO) composite cladding fusion coatings were fabricated through the vacuum cladding technique on a medium carbon structure steel (45# steel) substrate whose carbon content was 0.45 ± 0.03%. The microstructural characteristics, phase composition, and electrochemical polarization characteristics of the composite cladding fusion coatings were analyzed with scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, and the electrochemical workstation CHI660E. Results show that the microstructure was compact and was micro-crack free, and without inclusions or other defects. It was comprised of four micro-zones, namely, the composite, transition, diffusion fusion, and diffusion-affected zones with thicknesses of approximately 4 mm, 1 mm, 20 μm, and 250 μm, respectively. The main phases of the composite coating were γ-Ni solid solution, WC, Cr7C3, Ni2.9Cr0.7Fe0.36, Cr23C6, Ni3Fe, Ni3Si, Ni3B, W2C, and C. The self-corrosion potential of the composite coatings had increased by 0.3269 V compared with that of the substrate, and the corrosion current density of the composite coatings had decreased by nearly two orders of magnitude. The Ni-based solid solution region with relatively high C and Cr contents was difficult to dissolve.

X-ray diffraction determination of the composition of In x Ga1 − x Sb solid solution

2010 ◽  
Vol 46 (14) ◽  
pp. 1526-1528 ◽  
Author(s):  
Yu. N. Parkhomenko ◽  
A. A. Shlenskii ◽  
V. F. Pavlov ◽  
G. V. Shepekina ◽  
T. G. Yugova
Keyword(s):  
Solid Solution ◽  
X Ray Diffraction ◽  
X Ray ◽  
Diffraction Determination

X-Ray Characterization of Phase Equilibria of the Raveau and 2212 Phases in the Bi-Sr-Ca-Cu-0 System

1995 ◽  
Vol 39 ◽  
pp. 731-738
Author(s):  
Winnie Wong-Ng ◽  
Lawrence P. Cook ◽  
F. Jiang
Keyword(s):  
Solid Solution ◽  
Phase Equilibria ◽  
Powder Diffraction ◽  
Primary Crystallization ◽  
Primary Crystallization Field ◽  
X Ray ◽  
Solid Solution Region ◽  
Ca Substitution ◽  
Solution Region

Phase equilibria of two superconductor phases, namely the 20K Raveau phase (Bi2.2-xSr1.8+xCuOz, currently referred to as the 11905 phase) and the 80K 2212 phase of the Bi-Sr-Ca-Cu-0 system were investigated. The amount of Ca-substitution of the Raveau solid solution was determined and the solid solution region can be approximately described as Bi2.2+xSr1.8-X-Y CayCu1±x/2Ow (referred to as the Ca-Raveau phase or the 119x5, ‘ with 0<x<0.15, 0<y<0.5. To determine the melting equilibria of the 2212 phase, a procedure involving the use of a wicking technique to capture the melt was applied. X-ray powder diffraction (XPD) and quantitative energy dispersive x-ray spectroscopy (EDS) were used to analyse the phases present in the residual and melt, respectively. The approximate primary crystallization field of the incongruently melting 2212 phase was illustrated.

Microwave dielectric properties of (1 − x)Cu3Nb2O8−xZn3Nb2O8 ceramics

2001 ◽  
Vol 16 (5) ◽  
pp. 1465-1470 ◽  
Author(s):  
Dong-Wan Kim ◽  
In-Tae Kim ◽  
Byungwoo Park ◽  
Kug Sun Hong ◽  
Jong-Hee Kim
Keyword(s):  
Solid Solution ◽  
Dielectric Properties ◽  
Microwave Dielectric Properties ◽  
Sintering Behavior ◽  
X Ray Diffraction ◽  
Two Phase ◽  
Sintering Aid ◽  
Microwave Dielectric ◽  
Solid Solution Region ◽  
Solution Region

The sintering behavior and microwave dielectric properties of (1 − x)Cu3Nb2O8−xZn3Nb2O8 have been investigated using dilatometry, x-ray diffraction, and a network analyzer. It was found that (1 − x)Cu3Nb2O8−xZn3Nb2O8 ceramics have a much lower melting temperature than Zn3Nb2O8 ceramics without Cu3Nb2O8 additives. Samples sintered at 900 °C for 2 h exhibited densities >97% of the theoretical density. Cu3Nb2O8 acts as a sintering aid. Two phase regions were identified with increasing Zn3Nb2O8 contents. A Cu3Nb2O8−Zn3Nb2O8 solid solution exists from 0 < x < 0.5 while a mixture of Cu3Nb2O8 and Zn3Nb2O8 exists from 0.5 < x < 1. The microwave dielectric properties correlated to the crystal structure. In Cu3Nb2O8−Zn3Nb2O8 solid solution region, the variation of dielectric properties could be explained by the structure distortion of Cu3Nb2O8 due to electronic anisotropies of Cu2+ cations.

Impedance spectroscopy study of ionic diffusion in polycrystalline ZrO2:Y2O3 solid solution

2001 ◽  
Vol 699 ◽  
Author(s):  
Fábio C. Fonseca ◽  
Eliana N. S. Muccillo ◽  
R. Muccillo
Keyword(s):  
Solid Solution ◽  
Impedance Spectroscopy ◽  
Diffraction Line ◽  
X Ray Diffraction ◽  
Solid Solution Formation ◽  
X Ray ◽  
Experimental Sequence ◽  
Impedance Spectroscopy Study ◽  
Different Temperatures

AbstractThe ZrO2:Y2O3 solid solution formation has been followed by impedance spectroscopy and X-ray analysis. The experimental sequence, after mixing 8 mol% Y2O3 to ZrO2, was: attrition milling the mixture, drying, weighing, cold pressing, thermally treating at several different temperatures and times, performing the X-ray diffraction measurements at room temperature, applying metallic electrodes, and performing the impedance spectroscopy measurements in the 300°C-600°C temperature range. A good correlation was found between the decrease of the yttria main diffraction line and the increase of the stabilized zirconia main diffraction line, showing that solid solution is attained at the expenses of yttria, as expected. The impedance spectroscopy data Z(ω, T, t) show that the bulk response follows a t1/2 law, an evidence of yttrium diffusion to zirconia. Moreover, a relationship is found between the bulk resistivity and the elimination of ion blockers for increasing sintering times. The result allowed for the determination of the activation energy for the diffusion of the slowest diffusing species (Zr4+) in ZrO2:Y2O3.

Determination of inhomogeneity of cast solid solution by X-ray diffraction

1983 ◽  
Vol 79 (5-6) ◽  
pp. 347-360
Author(s):  
P. B�rczy ◽  
A. Ro�sz
Keyword(s):  
Solid Solution ◽  
X Ray Diffraction ◽  
X Ray

Effect of hydrostatic pressures on the crystal structure of InS

1995 ◽  
Vol 210 (7) ◽  
Author(s):  
U. Schwarz ◽  
H. Hillebrecht ◽  
K. Syassen
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Diffraction Data ◽  
Ambient Pressure ◽  
Lattice Parameters ◽  
Ambient Conditions ◽  
X Ray Diffraction ◽  
X Ray

AbstractWe have measured single crystal X-ray diffraction data of InS at ambient pressure and under hydrostatic pressures up to 4.3 GPa. The redetermination of the crystal structure at ambient conditions shows no major deviations from previous results. Determination of lattice parameters at various pressures confirms an extraordinary large compressibility for the

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