scholarly journals Piezoelectric, dielectric, and ferroelectric properties of high Curie temperature bismuth layer-structured bismuth titanate-tantalate (Bi3TiTaO9)

2019 ◽  
Vol 68 (14) ◽  
pp. 147701
Author(s):  
Long-Li Zheng ◽  
Shi-Chao Qi ◽  
Chun-Ming Wang ◽  
Lei Shi
Keyword(s):  
Curie Temperature ◽  
Bismuth Titanate ◽  
Ferroelectric Properties ◽  
High Curie Temperature

scholarly journals Pb(Er1/2Nb1/2)O3–Pb(Zn1/3Nb2/3)O3–PbTiO3 Single Crystals with High Curie Temperature

Crystals ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 22
Author(s):  
Yifei Chen ◽  
Zengzhe Xi ◽  
Feifei Guo ◽  
Pinyang Fang ◽  
Xiaojuan Li ◽  
...  
Keyword(s):  
Curie Temperature ◽  
Single Crystals ◽  
Ferroelectric Properties ◽  
Green Light ◽  
High Curie Temperature ◽  
Flux Method ◽  
Pure Perovskite Structure ◽  
Absolute Quantum Yield ◽  
Curie Temperature Tc ◽  
Absolute Quantum

In this work, 0.15Pb(Er1/2Nb1/2)O3–0.63Pb(Zn1/3Nb2/3)O3–0.22PbTiO3 (15PEN–63PZN–22PT) single crystals with a pure perovskite structure are obtained through the flux method. The phase structure, dielectric, ferroelectric properties and upconversion photoluminescence of the crystals are studied. The ternary crystals along the [110] orientation have a high Curie temperature (Tc = 250 °C) and large coercive field (Ec = 11.0597 kV/cm) which are higher than those of crystals reported previously. Furthermore, the PEN–PZN–PT crystals are produced with a strong green light excited by a 980 nm laser. Being in the range 298–478 K, the emission intensity of all peaks decreases with increase in temperature. The absolute quantum yield (QY) for the crystals is 0.00059%. These excellent properties provide new possibilities for multifunctional materials of optoelectronic devices.

Layer Structured Calcium Bismuth Titanate by Mechanical Activation

2005 ◽  
Vol 23 ◽  
pp. 47-50 ◽  
Author(s):  
M.H. Sim ◽  
J.M. Xue ◽  
J. Wang
Keyword(s):  
Dielectric Constant ◽  
Curie Temperature ◽  
Mechanical Activation ◽  
Room Temperature ◽  
Bismuth Titanate ◽  
Elevated Temperatures ◽  
Layer Structure ◽  
Ferroelectric Properties ◽  
Nitrogen Atmosphere ◽  
Theoretical Density

Nanocrystalline calcium bismuth titanate (CaBi4Ti4O15), which exhibits a layer structure, has been successfully synthesized by mechanical activation of constituent oxides of CaO, Bi2O3 and TiO2 in a nitrogen atmosphere at room temperature. The phase-forming calcination at elevated temperatures that is always required is skipped. CaBi4Ti4O15 derived from mechanical activation consists of nanocrystallites, which occur as aggregates of ~50 nm in sizes. It demonstrates an improved sinterability and was sintered to a density of 93.4% theoretical density at 1175oC for 2 hours. Ferroelectric properties of sintered CaBi4Ti4O15 derived from mechanical activation have been studied. A peak dielectric constant of 1049 at the Curie temperature of 774oC was measured at 1MHz for CaBi4Ti4O15 sintered at 1175oC.

Complex morphotropic domain structure and ferroelectric properties in high-TC single crystals of a ternary perovskite solid solution

2018 ◽  
Vol 6 (34) ◽  
pp. 9216-9223
Author(s):  
Zeng Luo ◽  
Nan Zhang ◽  
Zenghui Liu ◽  
Jian Zhuang ◽  
Jinyan Zhao ◽  
...  
Keyword(s):  
Solid Solution ◽  
Curie Temperature ◽  
Phase Boundary ◽  
Single Crystals ◽  
Monoclinic Phase ◽  
Ferroelectric Properties ◽  
Boundary Region ◽  
High Curie Temperature ◽  
High Tc ◽  
Domain Structures

Complex domain structures and monoclinic phase of the high Curie temperature (TC) BiScO3–Pb(Cd1/3Nb2/3)O3–PbTiO3 crystals in the morphotropic phase boundary region are investigated.

Large Remanent Polarization and Low Leakage Current in High-Tc 0.2Bi (Ni1/2Ti1/2)O3-0.8PbTiO3 Ferroelectric Thin Films

2014 ◽  
Vol 602-603 ◽  
pp. 804-807
Author(s):  
Zhen Kun Xie ◽  
Zhen Xing Yue
Keyword(s):  
Thin Films ◽  
Curie Temperature ◽  
Leakage Current ◽  
Ferroelectric Properties ◽  
High Curie Temperature ◽  
Si Substrates ◽  
Low Leakage ◽  
Low Leakage Current ◽  
Average Grain Size ◽  
Measured Polarization

High Curie-temperature (Tc) polycrystalline 0.2Bi (Ni1/2Ti1/2)O3-0.8PbTiO3 (0.2BNT-0.8PT) thin films were fabricated on Pt (111)/Ti/SiO2/Si substrates via an aqueous chemical solution deposition (CSD) technique. The thin films exhibited good crystalline quality and dense, uniform microstructures with an average grain size of 55 nm. The dielectric, piezoelectric and ferroelectric properties of the films was investigated. The permittivity peak appeared at 485 °C, which was 100 °C higher than that of Pb (Zr,Ti)O3 thin films. The local effective piezoelectric coefficient d33 was 45 pm/V at 3V. Moreover, a large remnant polarization with 2Pr up to 92 uC/cm2 and a small leakage current of 2.2×10-5 A/cm2 under an electric field of 400 kV/cm were obtained. The magnitude of the measured polarization and the high Curie temperature make the 0.2BNT-0.8PT films promising candidates for application in high-temperature ferroelectric and piezoelectric devices.

NIMAG 105

Alloy Digest ◽  
1976 ◽  
Vol 25 (5) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Curie Temperature ◽  
Physical Properties ◽  
Surface Treatment ◽  
Tensile Properties ◽  
Nickel Alloy ◽  
High Temperatures ◽  
Heat Treating ◽  
High Curie Temperature ◽  
Magnetostriction Coefficient

Abstract NIMAG 105 is a wrought nickel alloy with a high magnetostriction coefficient. It is easily formed or drawn, has a high Curie temperature and has low oxidation at high temperatures. It is recommended for electronic and electrical applications. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Ni-228. Producer or source: Spang Industries Inc..

scholarly journals Enhancing the electrical properties of high-Curie temperature BNT–PZT piezoceramics by oxides-hydrothermal method

AIP Advances ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 075119
Author(s):  
Bo Li ◽  
Fei Zhu ◽  
Deyi Zheng ◽  
Chi pang ◽  
Zihao Fei
Keyword(s):  
Electrical Properties ◽  
Curie Temperature ◽  
Hydrothermal Method ◽  
High Curie Temperature
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