Ferroelectric Q and antiferroelectric P phases' coexistence and local phase transitions in oxygen-deficient NaNbO3 single crystal: micro-Raman, dielectric and dilatometric studies

2012 ◽  
Vol 43 (8) ◽  
pp. 1141-1145 ◽  
Author(s):  
R. A. Shakhovoy ◽  
S. I. Raevskaya ◽  
L. A. Shakhovaya ◽  
D. V. Suzdalev ◽  
I. P. Raevski ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Single Crystal ◽  
Local Phase ◽  
Dilatometric Studies

Complex structure and Mössbauer effect observed in the course of phase transitions in PbZr0.72Sn0.28O3 single crystal

2020 ◽  
Vol 153 (22) ◽  
pp. 224202
Author(s):  
Irena Jankowska-Sumara ◽  
Mariola Kądziołka-Gaweł ◽  
Maria Podgórna ◽  
Andrzej Majchrowski ◽  
Krystian Roleder
Keyword(s):  
Phase Transitions ◽  
Single Crystal ◽  
Mössbauer Effect ◽  
Complex Structure ◽  
Mossbauer Effect

scholarly journals The Influence of Wire Speed on Phase Transitions and Residual Stress in Single Crystal Silicon Wafers Sawn by Resin Bonded Diamond Wire Saw

Micromachines ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 429
Author(s):  
Tengyun Liu ◽  
Peiqi Ge ◽  
Wenbo Bi
Keyword(s):  
Residual Stress ◽  
Surface Layer ◽  
Phase Transitions ◽  
Single Crystal ◽  
Amorphous Silicon ◽  
Silicon Wafer ◽  
Single Crystal Silicon ◽  
Silicon Wafers ◽  
Crystal Silicon ◽  
Diamond Wire

Lower warp is required for the single crystal silicon wafers sawn by a fixed diamond wire saw with the thinness of a silicon wafer. The residual stress in the surface layer of the silicon wafer is the primary reason for warp, which is generated by the phase transitions, elastic-plastic deformation, and non-uniform distribution of thermal energy during wire sawing. In this paper, an experiment of multi-wire sawing single crystal silicon is carried out, and the Raman spectra technique is used to detect the phase transitions and residual stress in the surface layer of the silicon wafers. Three different wire speeds are used to study the effect of wire speed on phase transition and residual stress of the silicon wafers. The experimental results indicate that amorphous silicon is generated during resin bonded diamond wire sawing, of which the Raman peaks are at 178.9 cm−1 and 468.5 cm−1. The ratio of the amorphous silicon surface area and the surface area of a single crystal silicon, and the depth of amorphous silicon layer increases with the increasing of wire speed. This indicates that more amorphous silicon is generated. There is both compressive stress and tensile stress on the surface layer of the silicon wafer. The residual tensile stress is between 0 and 200 MPa, and the compressive stress is between 0 and 300 MPa for the experimental results of this paper. Moreover, the residual stress increases with the increase of wire speed, indicating more amorphous silicon generated as well.

Stress and temperature-induced phase transitions and thermal expansion in (001)-cut PMN-31PT single crystal

2015 ◽  
Vol 652 ◽  
pp. 287-291 ◽  
Author(s):  
Xiaojuan Li ◽  
Zengzhe Xi ◽  
Peng Liu ◽  
Wei Long ◽  
Pinyang Fang
Keyword(s):  
Thermal Expansion ◽  
Phase Transitions ◽  
Single Crystal

Calorimetric and Dilatometric Studies on Successive Phase Transitions in Ferroelastic NH4BeF3

1984 ◽  
Vol 53 (8) ◽  
pp. 2600-2605 ◽  
Author(s):  
Hideyo Yoshida ◽  
Hiroaki Takemasa ◽  
Yasuo Oshino ◽  
Yasuharu Makita
Keyword(s):  
Phase Transitions ◽  
Dilatometric Studies ◽  
Successive Phase

scholarly journals Guest-Dependent Single-Crystal-to-Single-Crystal Phase Transitions in a Two-Dimensional Uranyl-Based Metal–Organic Framework

2018 ◽  
Vol 19 (1) ◽  
pp. 506-512 ◽  
Author(s):  
Sylvia L. Hanna ◽  
Xuan Zhang ◽  
Ken-ichi Otake ◽  
Riki J. Drout ◽  
Peng Li ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Single Crystal ◽  
Metal Organic Framework ◽  
Crystal Phase ◽  
Two Dimensional ◽  
Metal Organic ◽  
Organic Framework

scholarly journals Phase transitions in Zr-rich lead zirconate-titanate studied by single-crystal diffuse and inelastic X-ray scattering

2019 ◽  
Vol 75 (a2) ◽  
pp. e429-e429
Author(s):  
Daria Andronikova ◽  
Iurii Bronwald ◽  
Alexei Bosak ◽  
Dmitry Chernyshov ◽  
Alexey Filimonov ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Single Crystal ◽  
Lead Zirconate Titanate ◽  
Lead Zirconate ◽  
X Ray ◽  
X Ray Scattering ◽  
Zirconate Titanate ◽  
Ray Scattering

scholarly journals Single-crystal-to-single-crystal transformations triggered by dehydration in polyoxometalate-based compounds

2018 ◽  
Vol 74 (11) ◽  
pp. 1222-1242 ◽  
Author(s):  
Santiago Reinoso ◽  
Beñat Artetxe ◽  
Juan M. Gutiérrez-Zorrilla
Keyword(s):  
Phase Transitions ◽  
Single Crystal ◽  
Crystal Engineering ◽  
Structural Response ◽  
Transformation Process ◽  
External Stimulus ◽  
Stimuli Responsive ◽  
Feature Article ◽  
Crystal Transformation ◽  
Solvent Molecules

Single-crystal-to-single-crystal transformations are solid-state phase transitions between different crystalline states in which the crystal integrity and the long-range structural order are retained through the whole transformation process. Such a phenomenon constitutes the structural response that some compounds afford when being exposed to a given external stimulus (temperature, pressure, light, etc.) and, therefore, its study has become a relevant focus of interest within crystal engineering because it allows for monitoring how certain properties (colour, magnetism, luminescence, porosity) of the stimuli-responsive material are modified as the structure evolves into the activated form. A range of organic, inorganic and hybrid systems have been found to undergo such phase transitions, but these examples only include a small number of compounds that incorporate polyoxometalate anions, among which the removal of guest solvent molecules (dehydration) stands out as the most common external stimulus able to induce the occurrence of a single-crystal-to-single-crystal transformation. This feature article compiles the examples of dehydration-triggered single-crystal-to-single-crystal transformation studies that have been reported to date for polyoxometalate-based compounds and reviews some of their most relevant structural aspects.

scholarly journals A high-pressure single-crystal X-ray study of ZnSiO3 pyroxene: possible phase transitions at 19kbar and 51kbar.

1989 ◽  
Vol 14 (8) ◽  
pp. 383-387 ◽  
Author(s):  
Yasuhiro KUDOH ◽  
Hiroshi TAKEDA ◽  
Haruo OHASHI
Keyword(s):  
High Pressure ◽  
Phase Transitions ◽  
Single Crystal ◽  
X Ray

scholarly journals Heat capacity of lithium tungstate single crystal by DSC calorimetry data in the temperature range of 319-997 K

2021 ◽  
Vol 2057 (1) ◽  
pp. 012048
Author(s):  
N I Matskevich ◽  
V N Shlegel ◽  
A A Chernov ◽  
D A Samoshkin ◽  
S V Stankus ◽  
...  
Keyword(s):  
Heat Capacity ◽  
Phase Transitions ◽  
Single Crystal ◽  
Weight Control ◽  
Czochralski Technique ◽  
Temperature Range ◽  
First Time ◽  
Lithium Tungstate ◽  
Dsc Calorimetry ◽  
Calorimetry Data

Abstract The heat capacity of lithium tungstate single crystal (Li2WO4) was measured for the first time in the temperature range of 319-997 K. The experiments were carried out by DSC calorimetry. The Li2WO4 single crystal was first grown by low-temperature-gradient Czochralski technique with weight control. The temperature dependence of Li2WO4 heat capacity in the temperature range 319-997 K was monotonic. According to results of our studies, there were no phase transitions in Li2WO4 in the investigated temperature range.

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