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Wenwu Cao - One of the best experts on this subject based on the ideXlab platform.
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relaxor based ferroelectric Single Crystals growth domain engineering characterization and applications
Progress in Materials Science, 2014Co-Authors: Enwei Sun, Wenwu CaoAbstract:Abstract In the past decade, domain engineered relaxor-PT ferroelectric Single Crystals, including (1 − x )Pb(Mg 1/3 Nb 2/3 )O 3 – x PbTiO 3 (PMN–PT), (1 − x )Pb(Zn 1/3 Nb 2/3 )O 3 – x PbTiO 3 (PZN–PT) and (1 − x − y )Pb(In 1/2 Nb 1/2 )O 3 – y Pb(Mg 1/3 Nb 2/3 )O 3 – x PbTiO 3 (PIN–PMN–PT), with compositions near the morphotropic phase boundary (MPB) have triggered a revolution in electromechanical devices owing to their giant piezoelectric properties and ultra-high electromechanical coupling factors. Compared to traditional PbZr 1− x Ti x O 3 (PZT) ceramics, the piezoelectric coefficient d 33 is increased by a factor of 5 and the electromechanical coupling factor k 33 is increased from 90%. Many emerging rich physical phenomena, such as charged domain walls, multi-phase coexistence, and domain pattern symmetries, have posed challenging fundamental questions for scientists. The superior electromechanical properties of these domain engineered Single Crystals have prompted the design of a new generation electromechanical devices, including sensors, transducers, actuators and other electromechanical devices, with greatly improved performance. It took less than 7 years from the discovery of larger size PMN–PT Single Crystals to the commercial production of the high-end ultrasonic imaging probe “PureWave”. The speed of development is unprecedented, and the research collaboration between academia and industrial engineers on this topic is truly intriguing. It is also exciting to see that these relaxor-PT Single Crystals are being used to replace traditional PZT piezoceramics in many new fields outside of medical imaging. The new ternary PIN–PMN–PT Single Crystals, particularly the ones with Mn-doping, have laid a solid foundation for innovations in high power acoustic projectors and ultrasonic motors, hinting another revolution in underwater SONARs and miniature actuation devices. This article intends to provide a comprehensive review on the development of relaxor-PT Single Crystals, spanning material discovery, crystal growth techniques, domain engineering concept, and full-matrix property characterization all the way to device innovations. It outlines a truly encouraging story in materials science in the modern era. All key references are provided and 30 complete sets of material parameters for different types of relaxor-PT Single Crystals are listed in Appendix A . It is the intension of this review article to serve as a resource for those who are interested in basic research and practical applications of these relaxor-PT Single Crystals. In addition, possible mechanisms of giant piezoelectric properties in these domain-engineered relaxor-PT systems will be discussed based on contributions from polarization rotation and charged domain walls.
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relaxor based ferroelectric Single Crystals growth domain engineering characterization and applications
Progress in Materials Science, 2014Co-Authors: Enwei Sun, Wenwu CaoAbstract:In the past decade, domain engineered relaxor-PT ferroelectric Single Crystals, including (1-x)Pb(Mg1/3Nb2/3)O3-xPbTiO3 (PMN-PT), (1-x)Pb(Zn1/3Nb2/3)O3-xPbTiO3 (PZN-PT) and (1-x-y)Pb(In1/2Nb1/2)O3-yPb(Mg1/3Nb2/3)O3-xPbTiO3 (PIN-PMN-PT), with compositions near the morphotropic phase boundary (MPB) have triggered a revolution in electromechanical devices owing to their giant piezoelectric properties and ultra-high electromechanical coupling factors. Compared to traditional PbZr1-x Ti x O3 (PZT) ceramics, the piezoelectric coefficient d33 is increased by a factor of 5 and the electromechanical coupling factor k33 is increased from 90%. Many emerging rich physical phenomena, such as charged domain walls, multi-phase coexistence, domain pattern symmetries, etc., have posed challenging fundamental questions for scientists. The superior electromechanical properties of these domain engineered Single Crystals have prompted the design of a new generation electromechanical devices, including sensors, transducers, actuators and other electromechanical devices, with greatly improved performance. It took less than 7 years from the discovery of larger size PMN-PT Single Crystals to the commercial production of the high-end ultrasonic imaging probe "PureWave". The speed of development is unprecedented, and the research collaboration between academia and industrial engineers on this topic is truly intriguing. It is also exciting to see that these relaxor-PT Single Crystals are being used to replace traditional PZT piezoceramics in many new fields outside of medical imaging. The new ternary PIN-PMN-PT Single Crystals, particularly the ones with Mn-doping, have laid a solid foundation for innovations in high power acoustic projectors and ultrasonic motors, hinting another revolution in underwater SONARs and miniature actuation devices. This article intends to provide a comprehensive review on the development of relaxor-PT Single Crystals, spanning material discovery, crystal growth techniques, domain engineering concept, and full-matrix property characterization all the way to device innovations. It outlines a truly encouraging story in materials science in the modern era. All key references are provided and 30 complete sets of material parameters for different types of relaxor-PT Single Crystals are listed in the Appendix. It is the intension of this review article to serve as a resource for those who are interested in basic research and practical applications of these relaxor-PT Single Crystals. In addition, possible mechanisms of giant piezoelectric properties in these domain-engineered relaxor-PT systems will be discussed based on contributions from polarization rotation and charged domain walls.
Enwei Sun - One of the best experts on this subject based on the ideXlab platform.
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relaxor based ferroelectric Single Crystals growth domain engineering characterization and applications
Progress in Materials Science, 2014Co-Authors: Enwei Sun, Wenwu CaoAbstract:Abstract In the past decade, domain engineered relaxor-PT ferroelectric Single Crystals, including (1 − x )Pb(Mg 1/3 Nb 2/3 )O 3 – x PbTiO 3 (PMN–PT), (1 − x )Pb(Zn 1/3 Nb 2/3 )O 3 – x PbTiO 3 (PZN–PT) and (1 − x − y )Pb(In 1/2 Nb 1/2 )O 3 – y Pb(Mg 1/3 Nb 2/3 )O 3 – x PbTiO 3 (PIN–PMN–PT), with compositions near the morphotropic phase boundary (MPB) have triggered a revolution in electromechanical devices owing to their giant piezoelectric properties and ultra-high electromechanical coupling factors. Compared to traditional PbZr 1− x Ti x O 3 (PZT) ceramics, the piezoelectric coefficient d 33 is increased by a factor of 5 and the electromechanical coupling factor k 33 is increased from 90%. Many emerging rich physical phenomena, such as charged domain walls, multi-phase coexistence, and domain pattern symmetries, have posed challenging fundamental questions for scientists. The superior electromechanical properties of these domain engineered Single Crystals have prompted the design of a new generation electromechanical devices, including sensors, transducers, actuators and other electromechanical devices, with greatly improved performance. It took less than 7 years from the discovery of larger size PMN–PT Single Crystals to the commercial production of the high-end ultrasonic imaging probe “PureWave”. The speed of development is unprecedented, and the research collaboration between academia and industrial engineers on this topic is truly intriguing. It is also exciting to see that these relaxor-PT Single Crystals are being used to replace traditional PZT piezoceramics in many new fields outside of medical imaging. The new ternary PIN–PMN–PT Single Crystals, particularly the ones with Mn-doping, have laid a solid foundation for innovations in high power acoustic projectors and ultrasonic motors, hinting another revolution in underwater SONARs and miniature actuation devices. This article intends to provide a comprehensive review on the development of relaxor-PT Single Crystals, spanning material discovery, crystal growth techniques, domain engineering concept, and full-matrix property characterization all the way to device innovations. It outlines a truly encouraging story in materials science in the modern era. All key references are provided and 30 complete sets of material parameters for different types of relaxor-PT Single Crystals are listed in Appendix A . It is the intension of this review article to serve as a resource for those who are interested in basic research and practical applications of these relaxor-PT Single Crystals. In addition, possible mechanisms of giant piezoelectric properties in these domain-engineered relaxor-PT systems will be discussed based on contributions from polarization rotation and charged domain walls.
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relaxor based ferroelectric Single Crystals growth domain engineering characterization and applications
Progress in Materials Science, 2014Co-Authors: Enwei Sun, Wenwu CaoAbstract:In the past decade, domain engineered relaxor-PT ferroelectric Single Crystals, including (1-x)Pb(Mg1/3Nb2/3)O3-xPbTiO3 (PMN-PT), (1-x)Pb(Zn1/3Nb2/3)O3-xPbTiO3 (PZN-PT) and (1-x-y)Pb(In1/2Nb1/2)O3-yPb(Mg1/3Nb2/3)O3-xPbTiO3 (PIN-PMN-PT), with compositions near the morphotropic phase boundary (MPB) have triggered a revolution in electromechanical devices owing to their giant piezoelectric properties and ultra-high electromechanical coupling factors. Compared to traditional PbZr1-x Ti x O3 (PZT) ceramics, the piezoelectric coefficient d33 is increased by a factor of 5 and the electromechanical coupling factor k33 is increased from 90%. Many emerging rich physical phenomena, such as charged domain walls, multi-phase coexistence, domain pattern symmetries, etc., have posed challenging fundamental questions for scientists. The superior electromechanical properties of these domain engineered Single Crystals have prompted the design of a new generation electromechanical devices, including sensors, transducers, actuators and other electromechanical devices, with greatly improved performance. It took less than 7 years from the discovery of larger size PMN-PT Single Crystals to the commercial production of the high-end ultrasonic imaging probe "PureWave". The speed of development is unprecedented, and the research collaboration between academia and industrial engineers on this topic is truly intriguing. It is also exciting to see that these relaxor-PT Single Crystals are being used to replace traditional PZT piezoceramics in many new fields outside of medical imaging. The new ternary PIN-PMN-PT Single Crystals, particularly the ones with Mn-doping, have laid a solid foundation for innovations in high power acoustic projectors and ultrasonic motors, hinting another revolution in underwater SONARs and miniature actuation devices. This article intends to provide a comprehensive review on the development of relaxor-PT Single Crystals, spanning material discovery, crystal growth techniques, domain engineering concept, and full-matrix property characterization all the way to device innovations. It outlines a truly encouraging story in materials science in the modern era. All key references are provided and 30 complete sets of material parameters for different types of relaxor-PT Single Crystals are listed in the Appendix. It is the intension of this review article to serve as a resource for those who are interested in basic research and practical applications of these relaxor-PT Single Crystals. In addition, possible mechanisms of giant piezoelectric properties in these domain-engineered relaxor-PT systems will be discussed based on contributions from polarization rotation and charged domain walls.
Eric M Taleff - One of the best experts on this subject based on the ideXlab platform.
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dynamic abnormal grain growth a new method to produce Single Crystals
Scripta Materialia, 2009Co-Authors: James R Ciulik, Eric M TaleffAbstract:Dynamic abnormal grain growth (DAGG) is a newly discovered phenomenon which can be used to produce large Single Crystals from polycrystalline material in the solid state at temperatures above approximately half the melting temperature. The unique aspect of DAGG, compared to previously understood abnormal grain growth phenomena, is the requirement of plastic straining for initiation and propagation of abnormal grain growth. Our findings demonstrate that DAGG can be used to produce large Single Crystals of molybdenum in the solid state.
Gang Chen - One of the best experts on this subject based on the ideXlab platform.
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seeded growth of boron arsenide Single Crystals with high thermal conductivity
Applied Physics Letters, 2018Co-Authors: Fei Tian, Bai Song, Jingying Sun, Shuyuan Huyan, Jun Mao, Zhiwei Ding, Samuel Huberman, Tehuan Liu, Gang ChenAbstract:Materials with high thermal conductivities are crucial to effectively cooling high-power-density electronic and optoelectronic devices. Recently, zinc-blende boron arsenide (BAs) has been predicted to have a very high thermal conductivity of over 2000 W m−1 K−1 at room temperature by first-principles calculations, rendering it a close competitor for diamond which holds the highest thermal conductivity among bulk materials. Experimental demonstration, however, has proved extremely challenging, especially in the preparation of large high quality Single Crystals. Although BAs Crystals have been previously grown by chemical vapor transport (CVT), the growth process relies on spontaneous nucleation and results in small Crystals with multiple grains and various defects. Here, we report a controllable CVT synthesis of large Single BAs Crystals (400–600 μm) by using carefully selected tiny BAs Single Crystals as seeds. We have obtained BAs Single Crystals with a thermal conductivity of 351 ± 21 W m−1 K−1 at room ...
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engineering mesoporous Single Crystals co doped fe2o3 for high performance lithium ion batteries
Inorganic Chemistry, 2017Co-Authors: Huabin Kong, Chunshuang Yan, Gang ChenAbstract:To achieve high-efficiency lithium ion batteries (LIBs), an effective active electrode material is vital. For the first time, mesoporous Single Crystals cobalt-doped Fe2O3 (MSCs Co-Fe2O3) is synthesized using formamide as a pore forming agent, through a solvothermal process followed by calcination. Compared with mesoporous Single Crystals Fe2O3 (MSCs Fe2O3) and cobalt-doped Fe2O3 (Co-Fe2O3), MSCs Co-Fe2O3 exhibits a significantly improved electrochemical performance with high reversible capacity, excellent rate capability, and cycling life as anode materials for LIBs. The superior performance of MSCs Co-Fe2O3 can be ascribed to the combined structure characteristics, including Co-doping and mesoporous Single-Crystals structure, which endow Fe2O3 with rapid Li+ diffusion rate and tolerance for volume change.
Naoki Koshizuka - One of the best experts on this subject based on the ideXlab platform.
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high critical current density of nd ba nd 2cu3o7 δ Single Crystals
Applied Physics Letters, 1995Co-Authors: T Egi, Jianguo Wen, Kiyoshi Kuroda, H Unoki, Naoki KoshizukaAbstract:We have studied the superconducting properties of Nd(Ba1-xNdx)2Cu3O7-δ (Nd123, x≈0.1) Single Crystals grown by the traveling-solvent floating-zone method under 0.1% O2 in Ar atmosphere. An anomalous peak effect in the magnetization hysteresis (M-B) loop is observed in the Nd123 Single Crystals as well as in the Nd123 bulk Crystals prepared by the oxygen-controlled-melt-growth (OCMG) method. The critical current density (JC) of the Nd123 Single Crystals is 70,600 A/cm2 in 1.0T at 77K for the applied field perpendicular to the ab-plane. The existence of Nd and Ba composition variation in the matrix of Nd123 Crystals is observed by an analytical TEM equipped with a field-emission gun. The high Jc value of the Nd123 Single Crystals in the applied field is explained by the field-induced pinning centers caused by the Nd-Ba substitutions in the Nd123 matrix.
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high critical current density of nd ba nd 2cu3o7 δ Single Crystals
Applied Physics Letters, 1995Co-Authors: T Egi, Jianguo Wen, Kiyoshi Kuroda, H Unoki, Naoki KoshizukaAbstract:We have studied the superconducting properties of Nd(Ba1−xNdx)2Cu3O7−δ (Nd123, x≊0.1) Single Crystals grown by the traveling‐solvent floating‐zone method under 0.1% O2 in Ar atmosphere. An anomalous peak effect in the magnetization hysteresis (M–B) loop is observed in the Nd123 Single Crystals as well as in the Nd123 bulk Crystals prepared by the oxygen‐controlled melt growth (OCMG) method. The critical current density (Jc) of the Nd123 Single Crystals is 70 600 A/cm2 in 1.0 T at 77 K for the applied field perpendicular to the a‐b plane. Uniform flux density distribution with the same shape as the sample is observed in the field perpendicular to the a‐b plane by the magneto‐optical flux‐density observation. Finely dispersed white regions in the dark‐field image due to Nd substitutions for Ba are observed in the Nd123 matrix by the transmission electron microscopy. The high Jc value of the Nd123 Single Crystals in the applied field is explained by the field‐induced pinning centers caused by the Nd–Ba subst...
