High Conducting Heterovalent Substituted NASICON-like Phases in ScPO4-Na3PO4Quasibinary System

2008 ◽  
Vol 1100 ◽  
Author(s):  
Anna Potapova ◽  
Mariya Zhuravleva ◽  
Irina Smirnova ◽  
Felix Spiridonov ◽  
Galina Zimina ◽  
...  
Keyword(s):  
Ionic Conductivity ◽  
Impedance Spectroscopy ◽  
Phase Equilibria ◽  
Powder Diffraction ◽  
Solid Solutions ◽  
X Ray ◽  
Quasibinary System ◽  
Complex Phosphate

AbstractPhase equilibria in quasibinary system ScPO4-Na3PO4 and formation of heterovalent Zr-substituted solid solutions (up to 10 mol%) for Sc3+ in Na3Sc2(PO4)3 complex phosphate were studied by ceramic technique at 1050°C. Obtained samples were investigated with X-ray powder diffraction and impedance spectroscopy. Zr-substituted (10 mol%) Na3Sc2(PO4)3has ionic conductivity of 3.18.10-1 S/cm at 300°C.

NASICON-like phases in ScPO4-Na3PO4-Li3PO4 quasiternary system

2006 ◽  
Vol 936 ◽  
Author(s):  
Mariya Zhuravleva ◽  
Ruslan Zakalyukin ◽  
Valeriy Fomichev ◽  
Andrey Novoselov ◽  
Akira Yoshikawa ◽  
...  
Keyword(s):  
Ionic Conductivity ◽  
Impedance Spectroscopy ◽  
Ternary System ◽  
Phase Formation ◽  
Powder Diffraction ◽  
Temperature Dependency ◽  
X Ray ◽  
Quasiternary System

ABSTRACTPhase formation in ternary system of complex Sc, Na and Li phosphates was studied at 950°C and synthesis of new phases of definite composition was carried out. Obtained samples were investigated with X-ray powder diffraction, infrared and impedance spectroscopy. Compositions of fields of homogeneity with the NASICON-like structure were discovered. Temperature dependency of ionic conductivity was measured.

Phase Equilibria in Copper(I) Bromide-MBr Systems (M = Li, Na, K)

2007 ◽  
Vol 62 (9) ◽  
pp. 507-512 ◽  
Author(s):  
Alina Wojakowska ◽  
Edward Krzyżaka ◽  
Andrzej Wojakowski ◽  
Marek Wołcyrz
Keyword(s):  
Phase Equilibria ◽  
Powder Diffraction ◽  
Solid Solutions ◽  
Solid Solubility ◽  
Room Temperature ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Mutual Solid Solubility

The phase equilibria of CuBr-LiBr, CuBr-NaBr and CuBr-KBr were studied by difference scanning calorimetry (DSC) and X-ray powder diffraction. Extended solid solutions have been found in CuBr-LiBr, while mutual solid solubility of the components of CuBr-NaBr and CuBr-KBr seems to be negligible. It has been confirmed that K2CuBr3 is stable at room temperature.

X-ray powder diffraction and Mössbauer spectroscopic studies on the solubility limits in γ-FeOOH/γ-AIOOH solid solutions

1994 ◽  
Vol 29 (12) ◽  
pp. 3269-3273 ◽  
Author(s):  
E. Wolska ◽  
J. Šubrt ◽  
Z. Hába ◽  
J. Tláskal ◽  
U. Schwertmann
Keyword(s):  
Powder Diffraction ◽  
Solid Solutions ◽  
Spectroscopic Studies ◽  
X Ray

scholarly journals SOLUBILITY OF GERMANIUM DISELENIDE IN THE Cu3AsSe4

2021 ◽  
Vol 0 (4) ◽  
pp. 67-70
Author(s):  
Z.T. Hasanova ◽  
Keyword(s):  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Phase Equilibria ◽  
Solid Solutions ◽  
X Ray Diffraction ◽  
X Ray

Differential thermal analysis and powder X-ray diffraction methods were used for phase equilibria studying in the Cu3AsSe4-GeSe2 system. It was established that wide (up to 30 mol.%) solid solutions based on Cu3AsSe4 are formed. GeSe2-rich alloys consist of various heterogeneous mixtures, including phases outside the T–x plane of this section

Stability and Conductivity of Gd2((Mo1/3Mn2/3)xTi1-x)2O7

1997 ◽  
Vol 500 ◽  
Author(s):  
J. J. Sprague ◽  
O. Porat ◽  
H. L. Tuller
Keyword(s):  
Solid State ◽  
Ionic Conductivity ◽  
Impedance Spectroscopy ◽  
Stability Region ◽  
X Ray Diffraction ◽  
X Ray ◽  
The Stability ◽  
Stability Limits ◽  
Composite Solid ◽  
Solid State Electrochemical Device

ABSTRACTA composite solid state electrochemical device, with (Gd1-xCax)2Ti2O7 serving as the electrolyte and Gd2(Ti1-xMox)2O7 (GT-Mo) as the anode has recently been proposed. The latter exhibits high levels of mixed conduction under reducing atmospheres, but decomposes at high Po2. We have recently succeeded in extending the stability limits of the GT-Mo to higher Po2 with the addition of Mn. In this study, we report on the conductivity and stability of Gd2((Mo13Mn2/3)xTi1-x)207 (GMMT) as a function of Po2, T, and composition utilizing impedance spectroscopy and x-ray diffraction. The addition of Mn extends the stability region of the material to Po2 = 1 atm with little change in the magnitude of the conductivity. Defect models explaining the dependence of the conductivity on oxygen partial pressure are presented. Preliminary results from the use of an electronic blocking sandwich cell used to isolate the ionic conductivity of GMMT are also presented.

Powder-diffraction data for several solid solutions with the compositions (CaxSr1−x)CuO2 and (CaxSr1−x)2CuO3

1995 ◽  
Vol 10 (4) ◽  
pp. 296-299 ◽  
Author(s):  
S. T. Misture ◽  
C. Park ◽  
R. L. Snyder ◽  
B. Jobst ◽  
B. Seebacher
Keyword(s):  
High Temperature ◽  
Solid State ◽  
Powder Diffraction ◽  
Solid Solutions ◽  
Diffraction Data ◽  
Solid State Reaction ◽  
High Temperature Superconductors ◽  
Powder Diffraction Data ◽  
X Ray ◽  
Diffraction Patterns

Several compositions of the solid solutions (CaxSr1−x)CuO2 and (CaxSr1−x)2CuO3, both of which are found as minor phases in the high-temperature superconductors, were prepared by solid-state reaction. X-ray powder-diffraction patterns for three compositions of (CaxSr1−x)CuO2 and two for (CaxSr1−x)2CuO3 are presented.

High-temperature X-ray powder diffraction study of the tetragonal-cubic phase transition in nanocrystalline, compositionally homogeneous ZrO2–CeO2 solid solutions

2008 ◽  
Vol 23 (S1) ◽  
pp. S70-S74 ◽  
Author(s):  
L. M. Acuña ◽  
R. O. Fuentes ◽  
D. G. Lamas ◽  
I. O. Fábregas ◽  
N. E. Walsöe de Reca ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Phase Transition ◽  
High Temperature ◽  
Powder Diffraction ◽  
Solid Solutions ◽  
Tetragonal Phase ◽  
Room Temperature ◽  
Cubic Phase ◽  
X Ray ◽  
First Order

Crystal structure of compositionally homogeneous, nanocrystalline ZrO2–CeO2 solutions was investigated by X-ray powder diffraction as a function of temperature for compositions between 50 and 65 mol % CeO2. ZrO2-50 and 60 mol % CeO2 solid solutions, which exhibit the t′-form of the tetragonal phase at room temperature, transform into the cubic phase in two steps: t′-to-t″ followed by t″-to-cubic. But the ZrO2-65 mol % CeO2, which exhibits the t″-form, transforms directly to the cubic phase. The results suggest that t′-to-t″ transition is of first order, but t″-to-cubic seems to be of second order.

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