Phase transition regulation and piezoelectric performance optimization of fresnoite crystal for high temperature acceleration sensing

2021 ◽  
Author(s):  
Chao Jiang ◽  
Caizi Zhang ◽  
Fangfei Li ◽  
Li Sun ◽  
Yanlu Li ◽  
...  
Keyword(s):  
Phase Transition ◽  
Electrical Resistivity ◽  
High Temperature ◽  
Performance Optimization ◽  
Elevated Temperatures ◽  
Piezoelectric Response ◽  
Potential Candidate ◽  
High Electrical Resistivity ◽  
Sensing Applications ◽  
Piezoelectric Performance

Fresnoite crystal, Ba2TiSi2O8 (BTS), is a potential candidate for high temperature piezoelectric sensing applications, due to high electrical resistivity and strong piezoelectric response at elevated temperatures. However, anomalies of electro-elastic...

scholarly journals Cooper Pair-Like Systems at High Temperature and their Role on Fluctuations Near the Critical Temperature

1998 ◽  
Vol 12 (29n31) ◽  
pp. 3216-3219 ◽  
Author(s):  
M. Ausloos ◽  
S. Dorbolo
Keyword(s):  
Phase Transition ◽  
Electrical Resistivity ◽  
High Temperature ◽  
Critical Temperature ◽  
Oxygen Diffusion ◽  
Cooper Pair ◽  
Anomalous Behavior ◽  
Anomalous Effect ◽  
Linear Temperature ◽  
Ybco Sample

A logarithmic behavior is hidden in the linear temperature regime of the electrical resistivity R(T) of some YBCO sample below 2T c where "pairs" break apart, fluctuations occur and "a gap is opening". An anomalous effect also occurs near 200 K in the normal state Hall coefficient. In a simulation of oxygen diffusion in planar 123 YBCO, an anomalous behavior is found in the oxygen-vacancy motion near such a temperature. We claim that the behavior of the specific heat above and near the critical temperature should be reexamined in order to show the influence and implications of fluctuations and dimensionality on the nature of the phase transition and on the true onset temperature.

Mn-Mg disordering in cummingtonite: a high-temperature neutron powder diffraction study

2000 ◽  
Vol 64 (2) ◽  
pp. 255-266 ◽  
Author(s):  
J. J. Reece ◽  
S. A. T. Redfern ◽  
M. D. Welch ◽  
C. M. B. Henderson
Keyword(s):  
Crystal Structure ◽  
Phase Transition ◽  
New York ◽  
High Temperature ◽  
Powder Diffraction ◽  
Elevated Temperatures ◽  
Neutron Powder Diffraction ◽  
Site Preference ◽  
A Site

AbstractThe crystal structure of a manganoan cummingtonite, composition [M4](Na0.13Ca0.41Mg0.46Mn1.00) [M1,2,3](Mg4.87Mn0.13)(Si8O22)(OH)2, (Z = 2), a = 9.5539(2) Å, b = 18.0293(3) Å, c = 5.2999(1) Å, β = 102.614(2)° from Talcville, New York, has been refined at high temperature using in situ neutron powder diffraction. The P21/m to C2/m phase transition, observed as spontaneous strains +ε1 = −ε2, occurs at ˜107°C. Long-range disordering between Mg2+ and Mn2+ on the M(4) and M(2) sites occurs above 550°C. Mn2+ occupies the M(4) and M(2) sites preferring M(4) with a site-preference energy of 24.6±1.5 kJ mol−1. Disordering induces an increase in XMnM2 and decrease in XMnM4 at elevated temperatures. Upon cooling, the ordered states of cation occupancy are ‘frozen in’ and strains in lattice parameters are maintained, suggesting that re-equilibration during cooling has not taken place.

scholarly journals On the high temperature phase transition in Ba(Zr0.20Ti0.80)O3 ceramic

2017 ◽  
Vol 07 (04) ◽  
pp. 1750025 ◽  
Author(s):  
K. P. Chandra ◽  
A. R. Kulkarni ◽  
K. Prasad
Keyword(s):  
Phase Transition ◽  
High Temperature ◽  
Lattice Structure ◽  
High Temperature Phase ◽  
Monoclinic Space Group ◽  
Temperature Phase ◽  
Potential Candidate ◽  
Space Group ◽  
Structure Changes ◽  
Temperature Phase Transition

Temperature dependent X-ray diffraction (XRD) and dielectric properties of perovskite Ba(Zr[Formula: see text]Ti[Formula: see text]O3 ceramic prepared using a standard solid-state reaction process is presented. Along with phase transitions at low temperature, a new phase transition at high temperature (873[Formula: see text]C at 20[Formula: see text]Hz), diffusive in character has been found where the lattice structure changes from monoclinic (space group: [Formula: see text] to hexagonal (space group: [Formula: see text]). This result places present ceramic in the list of potential candidate for intended high temperature applications. The AC conductivity data followed hopping type charge conduction and supports jump relaxation model. The experimental value of [Formula: see text][Formula: see text]pC/N was found. The dependence of polarization and strain on electric field at room temperature suggested that lead-free Ba(Zr[Formula: see text]Ti[Formula: see text]O3 is a promising material for electrostrictive applications.

Thermal fluctuations near a phase transition probed through the electrical resistivity of high-temperature superconductors

2010 ◽  
Vol 78 (3) ◽  
pp. 310-316
Author(s):  
Noelia Cotón ◽  
Francisco J. Guzmán ◽  
Manuel V. Ramallo ◽  
Alexandre Ríos ◽  
Carolina Torrón ◽  
...  
Keyword(s):  
Phase Transition ◽  
Electrical Resistivity ◽  
High Temperature ◽  
High Temperature Superconductors ◽  
Thermal Fluctuations

ALLEGHENY LUDLUM OHMALOY 30

Alloy Digest ◽  
1996 ◽  
Vol 45 (2) ◽  
Keyword(s):  
Stainless Steel ◽  
Electrical Resistivity ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Heat Treating ◽  
Good Oxidation Resistance ◽  
High Electrical Resistivity ◽  
Temperature Performance

Abstract AL Ohmaloy 30 alloy is a moderately magnetic, ductile stainless steel with high electrical resistivity and good oxidation resistance. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fatigue. It also includes information on high temperature performance and corrosion resistance as well as heat treating and joining. Filing Code: SS-639. Producer or source: Allegheny Ludlum Corporation.

Phase Transition and Formation of TiSi2 Codeposited on Atomically Clean Si(111).

1993 ◽  
Vol 311 ◽  
Author(s):  
Hyeongtag Jeon ◽  
Y. S. Cho ◽  
E. Y. Kang ◽  
J. W. Park ◽  
R.R. Nemanich
Keyword(s):  
Phase Transition ◽  
Phase Transformation ◽  
High Temperature ◽  
Rough Surface ◽  
Smooth Surface ◽  
Elevated Temperatures ◽  
Titanium Silicide ◽  
Surface And Interface ◽  
Si Substrates ◽  
Si Films

ABSTRACTIn this study, the phase transformation and the surface and interface morphologies of TiSi2 formed on atomically clean Si substrates are investigated. 200Å Ti and 400A Si films on Si(111) have been co-deposited at elevated temperatures (400°C - 800°C) in ultrahigh vacuum. The phase transition of TiSi2 is characterized with using XRD. The results distinguish the formation of the C49 and C54 crystalline titanium silicides. The surface and interface morphologies of titanium silicides have been examined with SEM and TEM. A relatively smooth surface is observed for the C49 phase while a rough surface and interface are observed for the C54 phase. The islanding of the C54 phase becomes severe at high temperature (800°C). Islands of TiSi2 have been observed at temperatures above 700°C but no islands are observed at temperatures below 600°C. For films deposited at 400TC and 500°C, weak XRD peaks corresponding to TiSi were observed and TEM micrographs exhibited small crystalline regions of titanium silicide at the interface.

ALLEGHENY LUDLUM OHMALOY 40

Alloy Digest ◽  
1996 ◽  
Vol 45 (4) ◽  
Keyword(s):  
Stainless Steel ◽  
Electrical Resistivity ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Heat Treating ◽  
Good Oxidation Resistance ◽  
High Electrical Resistivity ◽  
Temperature Performance

Abstract AL Ohmaloy 40 is a moderately magnetic, ductile stainless steel with high electrical resistivity and good oxidation resistance. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fatigue. It also includes information on high temperature performance and corrosion resistance as well as heat treating and joining. Filing Code: SS-641. Producer or source: Allegheny Ludlum Corporation.

The Electrical Conductance of Some Alkali- and Divalent Transition Metal TCNQ Salts

1978 ◽  
Vol 33 (3) ◽  
pp. 344-346 ◽  
Author(s):  
H. H. Afify ◽  
F. M. Abdel-Kerim ◽  
H. F. Aly ◽  
A. A. Shabaka
Keyword(s):  
Phase Transition ◽  
Activation Energy ◽  
Electrical Resistivity ◽  
High Temperature ◽  
Transition Metal ◽  
Temperature Region ◽  
Electrical Conductance ◽  
Metal Cations ◽  
High Temperature Region ◽  
Transition Metal Cations

AbstractThe electrical resistivity of the tetracyanoquinodimethane salts of ten alkali and transition metal cations has been investigated at temperatures from 300 to 470 K. The measurements indicate a phase transition, the activation energy of conductance being smaller in the high temperature region. The nature of this phase transition is discussed.

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