A powder X-ray diffraction and Landau theory investigation of the cubic to tetragonal phase transition in NbN1 − x

1988 ◽  
Vol 143 (1-2) ◽  
pp. 339-343 ◽  
Author(s):  
S.-J Kim ◽  
H.F Franzen
Keyword(s):  
Phase Transition ◽  
Tetragonal Phase ◽  
Landau Theory ◽  
X Ray Diffraction ◽  
X Ray ◽  
Tetragonal Phase Transition

Variable temperature and high-pressure crystal chemistry of perovskite formamidinium lead iodide: a single crystal X-ray diffraction and computational study

2017 ◽  
Vol 53 (54) ◽  
pp. 7537-7540 ◽  
Author(s):  
Shijing Sun ◽  
Zeyu Deng ◽  
Yue Wu ◽  
Fengxia Wei ◽  
Furkan Halis Isikgor ◽  
...  
Keyword(s):  
Phase Transition ◽  
High Pressure ◽  
Low Temperature ◽  
Tetragonal Phase ◽  
Computational Study ◽  
Variable Temperature ◽  
X Ray Diffraction ◽  
Lead Iodide ◽  
X Ray ◽  
Tetragonal Phase Transition

Single crystals of [(NH2)2CH]PbI3 undergo a cubic-to-tetragonal phase transition at low temperature and high pressure.

Investigation of orthorhombic–tetragonal structural crossover in (Ba0.92Ca0.08)(Zr0.05Ti0.95)O3

2014 ◽  
Vol 47 (5) ◽  
pp. 1647-1650 ◽  
Author(s):  
G. Singh ◽  
A. Upadhaya ◽  
A. K. Sinha ◽  
V. S. Tiwari
Keyword(s):  
Phase Transition ◽  
High Temperature ◽  
Tetragonal Phase ◽  
Profile Analysis ◽  
Line Profile Analysis ◽  
Monoclinic Structure ◽  
Structural Refinement ◽  
X Ray Diffraction ◽  
X Ray ◽  
Tetragonal Phase Transition

The orthorhombic to tetragonal phase transition in (Ba0.92Ca0.08)(Zr0.05Ti0.95)O3was investigated using high-temperature X-ray diffraction between 260 and 333 K. The results established the presence of tetragonal (P4mm) and orthorhombic (Amm2) phase co-existence in the temperature range of 293 ≤T≤ 313 K. The tetragonal phase was found to increase from 27% at 293 K to 76% at 313 K. The structural refinement and line-profile analysis ruled out the presence of an intermediate monoclinic structure duringP4mm→Amm2 crossover. The analysis shows a pure orthorhombic (Amm2) structure forT< 293 K and tetragonal forT> 313 K.

High-Temperature Synchrotron X-Ray Powder Diffraction Study of the Orthorhombic–Tetragonal Phase Transition in La0.63(Ti0.92,Nb0.08)O3

2002 ◽  
Vol 164 (1) ◽  
pp. 51-59 ◽  
Author(s):  
Roushown Ali ◽  
Masatomo Yashima ◽  
Masahiko Tanaka ◽  
Hideki Yoshioka ◽  
Takeharu Mori ◽  
...  
Keyword(s):  
Phase Transition ◽  
High Temperature ◽  
Diffraction Study ◽  
Powder Diffraction ◽  
Tetragonal Phase ◽  
X Ray ◽  
Tetragonal Phase Transition

scholarly journals Phase diagram and dielectric properties of Pb(In1/2Nb1/2)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3 ceramics

2015 ◽  
Vol 05 (02) ◽  
pp. 1550014 ◽  
Author(s):  
Dabin Lin ◽  
Haohua Chen ◽  
Zhenrong Li ◽  
Zhuo Xu
Keyword(s):  
Phase Transition ◽  
Phase Diagram ◽  
Dielectric Measurements ◽  
X Ray Diffraction ◽  
Precursor Method ◽  
X Ray ◽  
Pbtio3 Ceramics ◽  
Curie Temperatures ◽  
Columbite Precursor ◽  
Tetragonal Phase Transition

x Pb ( In 1/2 Nb 1/2) O 3- Pb ( Mg 1/3 Nb 2/3) O 3- PbTiO 3(x PIN –y PMN –z PT ) ternary ceramics with morphotropic phase boundary (MPB) composition were synthesized by columbite precursor method. x PIN –y PMN –z PT phase diagram was investigated by x-ray diffraction and dielectric measurements. According to the results of dielectric measurements, the Curie temperatures (Tc) and rhombohedral to tetragonal phase transition temperature (Tr−t) were found to be in the range of 173–212°C and 114–155°C, respectively, indicating that the Tr-t was increased with adding PIN component. In the MPB region, the highest Tr-t = 155° C was found in 0.32PIN–0.38PMN–0.30PT ceramic, that greatly expanded temperature usage range.

X-ray diffraction study revealing phase coexistence in barium titanate stannate

2004 ◽  
Vol 19 (10) ◽  
pp. 2834-2840 ◽  
Author(s):  
Volkmar Mueller ◽  
Horst Beige ◽  
Hans-Peter Abicht ◽  
Christian Eisenschmidt
Keyword(s):  
Phase Transition ◽  
Ferroelectric Phase ◽  
Cubic Phase ◽  
X Ray Diffraction ◽  
Temperature Dependent ◽  
X Ray ◽  
Temperature Range ◽  
Xrd Study ◽  
Xrd Patterns ◽  
Tetragonal Phase Transition

In this paper, the results of a temperature dependent x-ray diffraction (XRD) study on BaTi0.95Sn0.05O3 (BTS-5) ceramics are compared with dielectric measurements. The orthorhombic-tetragonal phase transition at T2 = 306 K is found to proceed in a considerably wider temperature range than expected from the dielectric anomaly. Although the macroscopic properties of BTS-5 indicate a rather sharp ferroelectric phase transition at Tc = 358K, we observe anomalous XRD-patterns in a 25 K wide temperature range. This is interpreted in terms of mechanically clamped tetragonal and cubic phase, coexisting in the vicinity of Tc in grains with inhomogeneous Sn-distribution.

Orthorhombic to tetragonal phase transition in the RBa2Cu3O7−δ system studied by in - situ X-ray powder diffraction measurements

1988 ◽  
Vol 23 (10) ◽  
pp. 1409-1415 ◽  
Author(s):  
Y. Ueda ◽  
A. Mitushima ◽  
H. Toda ◽  
N. Kojima ◽  
M. Yoshikawa ◽  
...  
Keyword(s):  
Phase Transition ◽  
Powder Diffraction ◽  
Tetragonal Phase ◽  
X Ray ◽  
Tetragonal Phase Transition
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