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Effect of a Metallic Implant on the Hysteresis of Ferroelectric BaTiO 3 Ceramics 金属植入物对铁电batio3陶瓷迟滞性能的影响
4区 物理与天体物理 Q4 Materials Science Pub Date : 2023-10-05 DOI: 10.1080/07315171.2023.2238176
Nataly Asul García-Morales, Jose de Jesus Agustin Flores-Cuautle, Carlos Omar González Moran, Daniel Hernández Rivera, Ernesto Suaste-Gómez
AbstractThe dielectric constant and hysteresis loops of BaTiO3 ceramics with and without Pt implants were compared to determine the effect of the implant on the ceramic behavior. Ceramics with 90% relative density and 13.28 µm average grain size were analyzed. The results showed alterations in the ceramic’s coercive field, remanent polarization, and dielectric constant with an implant. The metallic implant affected the internal structure of the BaTiO3 ceramic, which reduced the ferroelectric properties of the material. In principle, these alterations can be seen as drawbacks, but they open new applications. The results provide insights into the real impact of metallic implants on the ferroelectric properties of the samples.Keywords: Barium titanateimplanted piezoelectric ceramicferroelectric hysteresisCurie temperature Disclosure StatementNo potential conflict of interest was reported by the author(s).
摘要比较了Pt掺杂和未掺杂BaTiO3陶瓷的介电常数和磁滞回线,以确定Pt掺杂对陶瓷性能的影响。分析了相对密度为90%,平均晶粒尺寸为13.28µm的陶瓷。结果表明,植入物改变了陶瓷的矫顽力场、剩余极化和介电常数。金属植入物影响了BaTiO3陶瓷的内部结构,降低了材料的铁电性能。原则上,这些更改可以被视为缺点,但它们打开了新的应用程序。研究结果揭示了金属植入物对样品铁电性能的实际影响。关键词:钛钡植入压电陶瓷铁电迟滞居里温度披露声明作者未报告潜在利益冲突。
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引用次数: 0
Study of the Lattice Thermal Conductivity of Janus In 2 Ge 2 S 6 and In 2 Ge 2 S 3 Se 3 Bilayers Janus in2ge2s6和in2ge2s3s3双分子层晶格导热性的研究
4区 物理与天体物理 Q4 Materials Science Pub Date : 2023-10-05 DOI: 10.1080/07315171.2023.2238178
Wei Ding, Yuhang Wang, Yifeng Tao
AbstractIn this paper, we investigate the lattice thermal conductivity of Janus In2Ge2S6 and In2Ge2S3Se3 bilayers by solving the phonon Boltzmann transport equation using first-principles calculations. We found that this is mainly due to the fact that the frequencies at which larger gaps appear in the intermediate and high frequency optical branches of In2Ge2S3Se3 are smaller than those of In2Ge2S6, which shifts the phonon dispersion curve of In2Ge2S3Se3 downward, which makes the overall phonon group velocity of In2Ge2S3Se3 material smaller than that of In2Ge2Se6 material, and also due to the fact that In2Ge2S3Se3 soft bending in the finite layer thickness coupling and the tight connection of the in-plane acoustic modes, resulting in increased phonon-phonon scattering processes, shorter phonon relaxation times, and larger Grüneisen parameters indicating a stronger anharmonic In2Ge2S3Se3 structure, all these factors combined lead to a lattice thermal conductivity of In2Ge2S3Se3 smaller than the lattice thermal conductivity of In2Ge2S6. At a temperature of 1000 K, the In2Ge2S3Se3 structure has a minimum lattice thermal conductivity of about 0.22 W/mK, and In2Ge2S6 has a minimum lattice thermal conductivity of about 0.4 W/mK. Our results suggest that Janus In2Ge2S6 and In2Ge2S3Se3 bilayers are potential for future thermal management of nanoelectronic devices and thermoelectric devices. two-dimensional materials.Keywords: Two-dimensional materialsFirst-principles calculationsLattice thermal conductivity Disclosure StatementNo potential conflict of interest was reported by the author(s).
摘要本文利用第一性原理计算方法求解声子玻尔兹曼输运方程,研究了Janus In2Ge2S6和In2Ge2S3Se3双分子层的晶格热导率。我们发现这主要是由于In2Ge2S3Se3的中高频光学分支出现较大间隙的频率小于In2Ge2S6,这使得In2Ge2S3Se3的声子色散曲线向下移动,使得In2Ge2S3Se3材料的整体声子群速度小于In2Ge2Se6材料。由于In2Ge2S3Se3在有限层厚耦合中的软弯曲和面内声模的紧密连接,导致声子-声子散射过程增加,声子弛豫时间缩短,grisen参数增大,表明In2Ge2S3Se3的非调和结构更强,所有这些因素综合起来导致In2Ge2S3Se3的晶格导热系数小于In2Ge2S6的晶格导热系数。在1000 K温度下,In2Ge2S3Se3结构的最小晶格导热系数约为0.22 W/mK, In2Ge2S6结构的最小晶格导热系数约为0.4 W/mK。我们的研究结果表明,Janus In2Ge2S6和In2Ge2S3Se3双分子层在未来纳米电子器件和热电器件的热管理方面具有潜力。二维材料。关键词:二维材料第一性原理计算晶格热导率披露声明作者未报告潜在利益冲突。
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引用次数: 0
Optimization of MPB for Sn Substituted Lead Bismuth Zirconate Titanate Thin Films by the Electromechanical Behavior Related to Energy Storage Capacity 利用与储能容量相关的机电行为优化锡取代锆钛酸铅铋薄膜的MPB
4区 物理与天体物理 Q4 Materials Science Pub Date : 2023-10-05 DOI: 10.1080/07315171.2023.2238173
Hitesh Kumar, Pratiksha Agnihotri, Ratnamala Chatterjee, Radheshyam Rai
AbstractIn this article, we examined the electromechanical behavior of Sn-substituted Lead Bismuth Zirconate Titanate thin films (PBZST thin films). Using the pulsed laser deposition technique (PLD), the thin film growth parameters of bismuth-doped PZST close to MPB were adjusted by varying the ∼(Zr, Sn)/Ti ratios. Thin films (∼250 nm) with the stoichiometric formula Pb0.985Bi0.01(Zr0.7Sn0.3)xTi1 – xO3, (x = 0.935, 0.940, 0.945, and 0.950) were grown on a Pt/TiO2/SiO2/Si substrate using PLD technique at optimized conditions. P-E loop confirms that MPB is near x = 0.945, and further PFM measurements also confirmed the same. Analyzing the PFM phase and amplitude hysteresis loops, local piezo-electric coefficient and remnant strain values were computed as d33 = 330 pm/V and 0.33 at the MPB composition (x = 0.945).Keywords: Electromechanicalceramicsenergy storageMPBpulsed laser depositionsubstrate Disclosure StatementNo potential conflict of interest was reported by the author(s).
摘要本文研究了锡取代锆铋钛酸铅薄膜(PBZST薄膜)的机电性能。利用脉冲激光沉积技术(PLD),通过改变掺杂铋的~ (Zr, Sn)/Ti的比例来调整接近MPB的PZST薄膜生长参数。在优化条件下,利用PLD技术在Pt/TiO2/SiO2/Si衬底上生长出化学计量公式为Pb0.985Bi0.01(Zr0.7Sn0.3)xTi1 - xO3 (x = 0.935, 0.940, 0.945和0.950)的薄膜(~ 250 nm)。P-E环证实MPB在x = 0.945附近,进一步的PFM测量也证实了这一点。通过对PFM相位和幅值滞回线的分析,计算出在MPB成分下,局部压电系数d33 = 330 pm/V,残余应变值0.33 (x = 0.945)。关键词:机电陶瓷储能脉冲激光沉积衬底披露声明作者未报告潜在利益冲突。
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引用次数: 0
Investigation of Structural and Dielectric Behavior of Ba0.7Gd0.3MoxFe12-xO19 (Where x = 0.02) Hexaferrite Ceramics Ba0.7Gd0.3MoxFe12-xO19 (x = 0.02)六铁体陶瓷的结构和介电行为研究
IF 0.4 4区 物理与天体物理 Q4 Materials Science Pub Date : 2023-05-04 DOI: 10.1080/07315171.2023.2189851
Pratiksha Agnihotri, Abhijeet Kumar, R. Rai, Budhendra Singh
Abstract Multiferroic ceramic composites of (Ba0.7Gd0.3MoxFe12-xO19 were prepared by using the solid-state reaction method with mol% fractions of x = 0.02, The preliminary structural studies carried out by X-ray diffraction at room temperature. It reveals that the samples have a hexagonal structure ferrite phase. The impurity phase of x-Fe2O3 appear at 32 ∼ 34 degree. Debye–Scherer and Williamson–Hall method were used to analysis for peak broadening Ba0.7Gd0.3MoxFe12-xO19 (where x = 0.02). Dielectric graphs show that curie temperature shifted towards the high temperature with increasing the frequency. the dielectric transitions at 200–300 °C.
摘要:采用固相反应法制备了(Ba0.7Gd0.3MoxFe12-xO19)多铁陶瓷复合材料,其摩尔%分数为x = 0.02,在室温下用x射线衍射对其结构进行了初步研究。结果表明,样品具有六方结构的铁素体相。x-Fe2O3的杂质相出现在32 ~ 34度。采用Debye-Scherer和Williamson-Hall方法分析Ba0.7Gd0.3MoxFe12-xO19(其中x = 0.02)的峰展宽。电介质图显示,随着频率的增加,居里温度向高温方向移动。电介质在200 ~ 300℃时发生跃迁。
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引用次数: 1
Photoluminescence Properties of Ho3+-doped Fluoroborate Optical Glasses 掺杂氟硼酸盐光学玻璃的光致发光性能
IF 0.4 4区 物理与天体物理 Q4 Materials Science Pub Date : 2023-05-04 DOI: 10.1080/07315171.2023.2189849
Z. T. Naik, B. H. Rudramadevi
Abstract A trivalent rare earth ion Holmium doped zinc magnesium lithium fluoroborate (ZMLB) glasses with the composition of 10ZnO-10MgO-20LiF-(60-x)B2O3-xHo2O3 (where x = 0, 0.1, 0.3, 0.5 and 1 mol%) were prepared by a well-known melt quenching procedure. The produced glass samples structural, optical, emission and decay curve characteristics have been investigated. From the X-ray diffraction investigation, it is confirmed all the produced glasses possess amorphous nature. The borate-oxygen and vibration bonds were noticed by using Fourier transform infrared analysis. From the ultraviolet-visible absorption studies, the produced glasses absorption peaks were noticed and optical energy band gap values also identified by using Tauc’s relation. Under excitation with 456 nm, the Ho3+ activated ZMLB glasses luminescence spectra consist of three luminescence bands positioned at 550, 677 and 764 nm were corresponding electronic transitions are 5S2 + 5F4 → 5I8, 5F5→ 5I8 and 5F4→ 5I7, respectively. From all these emission bands the prominent emission band observed at 550 nm (green). For the Ho3+ activated ZMLB glasses, the lifetimes were decreased with the enhance of Ho3+ doping content owing to energy transfer in resonance form in between Ho3+ ions. From emission spectra, the CCT and CIE coordinates were estimated, and the CIE values are pointed greenish-yellow area in CIE image. Therefore, all these findings convey that the current zinc magnesium lithium fluoroborate glasses conceivably significant candidate for green display and lighting applications.
摘要:采用熔体淬火法制备了一种三价稀土离子掺氟硼酸锌镁锂(ZMLB)玻璃,其组成为10ZnO-10MgO-20LiF-(60-x)B2O3-xHo2O3(其中x = 0、0.1、0.3、0.5和1 mol%)。研究了制备的玻璃样品的结构、光学、发射和衰减曲线特性。通过x射线衍射分析,证实了所制备的玻璃均具有无定形性质。利用傅里叶变换红外分析发现了硼氧键和振动键。从紫外-可见吸收研究中,观察到产生的玻璃吸收峰,并利用Tauc关系确定了光能带隙值。在456nm激发下,Ho3+活化ZMLB玻璃的发光光谱由位于550、677和764 nm的三个发光带组成,对应的电子跃迁分别为5S2 + 5F4→5I8、5F5→5I8和5F4→5I7。在所有这些发射波段中,在550 nm处观测到突出的发射波段(绿色)。对于Ho3+活化的ZMLB玻璃,随着Ho3+掺杂量的增加,由于Ho3+离子之间以共振形式的能量转移,寿命降低。从发射光谱中估计出CCT和CIE坐标,CIE值在CIE图像中为指向的黄绿色区域。因此,所有这些发现都表明,目前氟硼酸锌镁锂玻璃是绿色显示和照明应用的重要候选者。
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引用次数: 0
High-frequency inlaid cylindrical piezoelectric transducer for high-sensitivity acoustics 用于高灵敏度声学的高频镶嵌圆柱形压电换能器
IF 0.4 4区 物理与天体物理 Q4 Materials Science Pub Date : 2023-05-04 DOI: 10.1080/07315171.2023.2189852
Tian Rong, Qinghua Luo, Chenxu Wang, Yingchun Li, Guangle Jia, Zhaoxiang Yu
Abstract This work develops a high-frequency high-sensitivity inlaid cylindrical hydroacoustic transducer by enhancing the electromechanical coupling coefficient, amplifying stress, and adopting circumferential inlaid techniques. Equivalent circuit and finite element simulation methods were used to determine the optimum parameters of the unit, then the transducer was fabricated. Tests show that the resonant frequency of every array unit was 220 kHz. The maximum emission voltage response and reception sensitivity were respectively about 172 dB and −177 dB, with emission and reception bandwidths both about 40 kHz at 3 dB loss. The horizontal and vertical beamwidths were 15° and 4° for each unit respectively.
通过提高机电耦合系数,放大应力,采用周向镶嵌技术,研制了一种高频高灵敏度的嵌装圆柱形水声换能器。采用等效电路法和有限元仿真法确定了换能器的最佳参数,并对换能器进行了制作。试验表明,各阵列单元的谐振频率为220 kHz。最大发射电压响应和接收灵敏度分别约为172 dB和- 177 dB,发射和接收带宽均约为40 kHz,损耗为3db。每个单元的水平和垂直光束宽度分别为15°和4°。
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引用次数: 0
A ring-type traveling wave linear ultrasonic motor based on in-plane third-order modal vibration 一种基于面内三阶模态振动的环形行波直线超声电机
IF 0.4 4区 物理与天体物理 Q4 Materials Science Pub Date : 2023-05-04 DOI: 10.1080/07315171.2023.2189853
Junlin Yang, Ye Chen, Jinbo Yang, Chaoqun Xiang, Liang Li
Abstract This paper proposes a new type of circular ring traveling wave linear ultrasonic motor with incomplete teeth. The motor’s movable slider is pressed against the end face of the tooth structure on the outer surface of the circular ring vibrator under a certain pre-pressure, four piezoelectric ceramic plates are evenly distributed at 90° intervals on the inner side of the circular structure, and four sets of driving teeth are arranged at 45° intervals from the position of the piezoelectric ceramic plates.When the motor is in operation, only one driving tooth works, and the life of the ultrasonic motor can be increased by rotating the different working teeth. The motor operates in two in-plane third-order bending modes that are orthogonal to each other at the same frequency. The dynamic design and simulation of the vibrator was carried out using ANSYS finite element software to analyze the effect of the structure on the mode. The principle prototype was fabricated, and the operating mode of the vibrator was measured using a laser Doppler vibrometer (LDV), and the vibration characteristics and output performance of the prototype were tested. Experimental results show that the motor runs smoothly at the excitation voltage of 240 V peak-to-peak, the excitation frequency of 30.459 kHz and the pre-pressure of 0.6 N, with the maximum output force of 90 mN and the motor no-load speed of 102 mm/s.
提出了一种新型不完整齿环行波直线超声电机。电机的活动滑块在一定的预压力下压在环形振动器外表面的齿状结构端面上,四块压电陶瓷板以90°的间隔均匀分布在圆形结构内侧,四组驱动齿距压电陶瓷板位置以45°的间隔布置。当电机工作时,只有一个驱动齿工作,通过旋转不同的工作齿可以增加超声波电机的寿命。电机在两个平面内三阶弯曲模式下工作,这两个模式在相同频率下彼此正交。利用ANSYS有限元软件对激振器进行了动态设计与仿真,分析了结构对振型的影响。制作了原理样机,利用激光多普勒测振仪(LDV)测量了振动器的工作模式,测试了样机的振动特性和输出性能。实验结果表明,在激励电压为240 V峰对峰、激励频率为30.459 kHz、预压为0.6 N时,电机运行平稳,最大输出力为90 mN,电机空载速度为102 mm/s。
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引用次数: 1
Research on a high-frequency unfilled layered symmetrical piezoelectric material with a high effective electromechanical coupling coefficient 具有高效机电耦合系数的高频非填充层状对称压电材料的研究
IF 0.4 4区 物理与天体物理 Q4 Materials Science Pub Date : 2023-05-04 DOI: 10.1080/07315171.2023.2189848
Tian Rong, Chenxu Wang
Abstract As the demand for high-performance hydrophones for marine communication systems grows, this paper develops a high-frequency unfilled layered symmetrical piezoelectric material with high effective electromechanical coupling coefficient. The vibration mode of piezoelectric material is converted into vibration mode of the piezoelectric pillar to improve the effective electromechanical coupling coefficient of the material. The material is determined by the equivalent circuit method and ANSYS finite element simulation method. Test results show that the resonant frequency is 117.8 kHz and the effective electromechanical coupling coefficient is 0.67, which shows that the developed material has a good electromechanical conversion performance.
摘要:随着船舶通信系统对高性能水听器需求的增长,本文开发了一种具有高效机电耦合系数的高频非填充层状对称压电材料。将压电材料的振动模式转换为压电柱的振动模式,提高了材料的有效机电耦合系数。材料采用等效电路法和ANSYS有限元模拟法确定。试验结果表明,该材料的谐振频率为117.8 kHz,有效机电耦合系数为0.67,具有良好的机电转换性能。
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引用次数: 0
Theoretical study on the negative differential resistance behavior of N-doped GeSe monolayer n掺杂GeSe单层负差分电阻行为的理论研究
IF 0.4 4区 物理与天体物理 Q4 Materials Science Pub Date : 2023-05-04 DOI: 10.1080/07315171.2023.2189850
Caixia Guo, Wenlong Jiao, Tianxing Wang
Abstract Using a combination of non-equilibrium Green’s function (NEGF) and density functional theory (DFT), the electronic structures and transport characteristics of N-doped GeSe monolayer were investigated systematically. The calculated band structures illustrated that the doping of N atoms changed GeSe monolayer from a semiconductor to a metal. Further, a clear negative differential resistance behavior (NDR) was found in the voltage-current curves of the N-doped GeSe based devices. Moreover, the current peak-to-valley ratio (PVR) varied with the doping concentration of N atoms. As the doping concentration decreased, the peak of NDR shifted toward the millivolt region. Especially, the NDR behavior with a PVR up to 103 entered the mV bias region when the doping concentration was reduced to 0.69%. These results provide a novel approach to design the low power nanodevice based on the GeSe monolayer.
采用非平衡格林函数(NEGF)和密度泛函理论(DFT)相结合的方法,系统地研究了n掺杂GeSe单层的电子结构和输运特性。计算的能带结构表明,N原子的掺杂使GeSe单层从半导体变为金属。此外,在n掺杂GeSe基器件的电压-电流曲线中发现了明显的负差分电阻行为(NDR)。此外,电流峰谷比(PVR)随N原子掺杂浓度的变化而变化。随着掺杂浓度的降低,NDR峰向毫伏区偏移。特别是当掺杂浓度降至0.69%时,PVR高达103的NDR行为进入mV偏置区。这些结果为设计基于GeSe单层的低功耗纳米器件提供了一种新的途径。
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引用次数: 0
Synergistic effect of self-poled fibre based flexible lead-free KNN/P(VDF-HFP) nanofiber mat for scavenging piezoelectric energy 自极性纤维基柔性无铅KNN/P(VDF-HFP)纳米纤维垫清除压电能量的协同效应
IF 0.4 4区 物理与天体物理 Q4 Materials Science Pub Date : 2022-11-02 DOI: 10.1080/07315171.2022.2122412
G. Kaur, Pratiksha, Mamta Shandilya, Sahil Kumar
Abstract KNN/P(VDF-HFP) based nanofiber composite was developed by using the electrospinning technique. The significant enhanced value of β-phase content on addition of KNN is evident from the XRD and FTIR spectrum. FE-SEM micrographs reveal the formation of dense and compact nanofillers and their embedment within polymer matrix results in homogenous, smooth and uniform nanofibers without any agglomeration. The piezoelectric response of the nanofiber mat was improved by enhancing the induced charge of P(VDF-HFP) and β-phase content on incorporating KNN within the matrix, which holds great potential to improve the self-power generation performance of piezoelectric nano-generators.
摘要采用静电纺丝技术制备了KNN/P(VDF-HFP)基纳米纤维复合材料。XRD和FTIR分析表明,加入KNN后,β相含量显著提高。FE-SEM显微图显示,纳米填料致密致密的形成及其在聚合物基体中的嵌入使纳米纤维均匀、光滑、均匀,无团聚现象。通过在基体中加入KNN,提高P(VDF-HFP)的诱导电荷和β相含量,改善了纳米纤维垫的压电响应,这对提高压电纳米发电机的自发电性能具有很大的潜力。
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引用次数: 1
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Ferroelectrics Letters Section
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