Damping constant and the inverse relaxation time calculated as a function of pressure using the X-ray diffraction data close to the cubic-tetragonal phase transition in SrTiO3

2019 ◽  
Vol 551 (1) ◽  
pp. 143-151
Author(s):  
H. Yurtseven ◽  
A. Kiraci
Keyword(s):  
Phase Transition ◽  
Relaxation Time ◽  
Diffraction Data ◽  
Tetragonal Phase ◽  
X Ray Diffraction ◽  
X Ray ◽  
Inverse Relaxation Time ◽  
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.

X-ray powder diffraction data of A-formula lanthanum and titanium substituted lead zirconate

2003 ◽  
Vol 18 (3) ◽  
pp. 252-262 ◽  
Author(s):  
Else Breval ◽  
Nichole Wonderling ◽  
Joseph P. Dougherty
Keyword(s):  
Powder Diffraction ◽  
Diffraction Data ◽  
Tetragonal Phase ◽  
Hexagonal Phase ◽  
Lead Zirconate ◽  
Powder Diffraction Data ◽  
X Ray Diffraction ◽  
X Ray ◽  
Phase Pure

PLZT of the compositions 0≤L≤12, and 0≤T≤10 was studied in order to describe the structure of the phases as a function of composition. This range contains a mixed region with PLZT+La2Zr2O7, an orthorhombic, a rhombohedral (hexagonal) phase, a tetragonal phase, and a mixture of different PLZT phases. Each phase pure composition is described by X-ray diffraction.

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

The two-step phase transition of titanite, CaTiSiO5: a synchrotron radiation study

1997 ◽  
Vol 212 (1) ◽  
Author(s):  
S. Kek ◽  
M. Aroyo ◽  
U. Bismayer ◽  
C. Schmidt ◽  
K. Eichhorn ◽  
...  
Keyword(s):  
Phase Transition ◽  
Synchrotron Radiation ◽  
Diffraction Data ◽  
Structural Changes ◽  
X Ray Diffraction ◽  
X Ray ◽  
Radiation Study

AbstractIn this study it is shown that the antiferrodistortive phase transition in titanite, CaTiSiOIn order to study the stepwise structural changes synchrotron radiation was used to collect X-ray diffraction data at 100 K, 295 K and 530 K on the 4-circle diffractometer at HASYLAB using a wavelength of 0.560(1) Å. A total of 2292 reflections were recorded at 100 K, 1540 at 295 K and 1442 at 530 K and reduced to 705 (100 K), 707 (295 K) and 358 (530 K) unique observations respectively (sin

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.

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