Article
Physics, Applied
Kaiyang Xia, Chaoliang Hu, Chenguang Fu, Xinbing Zhao, Tiejun Zhu
Summary: Half-Heusler compounds with 18 valence electrons are considered promising high-temperature thermoelectric materials, while nominal 19-electron compounds have gained popularity due to their unexpected high performance. The focus is now on the discovery and challenges of cation-deficient 19-electron half-Heusler compounds with vacancy-related short-range order, offering insights into defect-tailored thermoelectric properties.
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Physical
Amin Nozariasbmarz, Udara Saparamadu, Wenjie Li, Han Byul Kang, Carter Dettor, Hangtian Zhu, Bed Poudel, Shashank Priya
Summary: This study demonstrates a TEG fabrication process that can achieve high electrical conversion efficiency at high temperatures by reducing thermal and electrical resistances between metal electrodes and TE legs, improving TEG performance and stability.
JOURNAL OF POWER SOURCES
(2021)
Article
Physics, Condensed Matter
Bindu Rani, Aadil Fayaz Wani, Shakeel Ahmad Khandy, Utkir Bahodirovich Sharopov, Lokanath Patra, Kulwinder Kaur, Shobhna Dhiman
Summary: In this work, the authors investigated the properties of a novel PdVGa half Heusler compound and found its potential as a thermoelectric material.
SOLID STATE COMMUNICATIONS
(2022)
Article
Energy & Fuels
Robert J. Quinn, Gavin B. G. Stenning, Jan-Willem G. Bos
Summary: Understanding the electronic scattering mechanism is crucial for optimizing thermoelectric materials. This report highlights the significance of residual resistivity in identifying the dominant scattering mechanism. A straightforward method for analyzing resistivity data is proposed and applied to different thermoelectric systems. The results show that the scattering mechanism depends sensitively on composition and can be quantified by studying the interaction between phonons and carriers.
JOURNAL OF PHYSICS-ENERGY
(2022)
Article
Materials Science, Multidisciplinary
Sung-Jae Joo, Ji-Hee Son, JeongIn Jang, Bong-Seo Kim, Bok-Ki Min
Summary: The study synthesized half-Heusler thermoelectric materials and analyzed their properties, fabricated generator modules and tested the electrical conversion efficiency. The results were affected by non-negligible contact resistivity at the brazed interfaces.
KOREAN JOURNAL OF METALS AND MATERIALS
(2021)
Article
Chemistry, Physical
Shakeel Ahmad Khandy, Jeng-Da Chai
Summary: The study reveals satisfactory thermoelectric properties of ZrRhSb under strain, especially achieving optimal performance at 10% compression. The phonon dynamic stability as well as the material's mechanical and elastic properties have an impact on its thermoelectric performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
Nagendra S. Chauhan, Dipanwita Bhattacharjee, Tanmoy Maiti, Yury V. Kolen'ko, Yuzuru Miyazaki, Amrita Bhattacharya
Summary: This study reports a stable n-type biphasic-quaternary half-Heusler alloy with low lattice thermal conductivity, comparable to nanostructured half-Heusler alloys, within a wide temperature range. The alloy undergoes a solid-state transformation that significantly enhances phonon scattering, and its electrical properties correlate with the electronic band structure and valence electron count.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Dhurba R. Jaishi, Sujit Bati, Nileema Sharma, Bishnu Karki, Bishnu P. Belbase, Madhav Prasad Ghimire
Summary: Thermoelectric phenomena provide an alternative solution to the energy crisis by utilizing waste heat energy, and this study investigates the properties of rhodium-based half-Heusler alloys and finds that p-type doping improves the thermoelectric properties.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Engineering, Electrical & Electronic
Khadidja Berarma, Saber Saad Essaoud, Ahmad A. Mousa, Said M. Azar, Anas Y. Al-Reyahi
Summary: A computational study using ab initio calculations was conducted to investigate the structural, electronic, and optical properties of double half-Heusler alloys Ta2FeNiSn2 and Nb2FeNiSn2. The results showed that both alloys exhibit high stability and thermoelectric efficiency.
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Kumar Saurabh, Vineet Kumar Pandey, Ankit Kumar, Prasenjit Ghosh, Surjeet Singh
Summary: Half-Heusler alloys have the potential to be used as mid-to-high temperature range thermoelectric materials due to their high power factor and solid structural stability. However, the high lattice thermal conductivity of these materials hinders their practical applications. In this study, we investigate the effects of excess Nb and Sn doping in defective half-Heuslers and show that Sn doping allows for a finer control of carrier concentration and a higher concentration of Nb in the structure. The optimized carrier concentration and changes in the band structure lead to suppression of bipolarity and enhancement of thermopower at high temperatures, resulting in a high zT value exceeding 1 at 1100 K. This value is approximately 15% higher than the highest zT previously reported.
MATERIALS TODAY PHYSICS
(2023)
Article
Chemistry, Inorganic & Nuclear
Rajveer Jha, Naohito Tsujii, Cedric Bourges, Weihong Gao, Ernst Bauer, Takao Mori
Summary: The effects of Cu doping in Fe2-xCuxVAl on thermoelectric properties were investigated. The results showed that Cu doping for Fe sites led to an increase in Seebeck coefficient and a decrease in thermal conductivity. Furthermore, co-doping with Si for Al sites improved the thermoelectric properties. The study suggests a correlation between the magnetic character and the larger Seebeck coefficient.
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
(2022)
Article
Multidisciplinary Sciences
Zirui Dong, Jun Luo, Chenyang Wang, Ying Jiang, Shihua Tan, Yubo Zhang, Yuri Grin, Zhiyang Yu, Kai Guo, Jiye Zhang, Wenqing Zhang
Summary: This study reports the discovery of TiRu1+xSb solid solution with wide homogeneity range and tunable thermoelectric properties. It bridges the composition gap between half-Heusler and full-Heusler phases. TiRu1.8Sb exhibits unusually low lattice thermal conductivity among reported half-Heusler phases. In a certain range of Ru composition, TiRu1+xSb shows abnormal semiconductor behavior seemingly related to localized d electrons.
NATURE COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
J. Mayandi, R. K. Madathil, C. Abinaya, K. Bethke, V. Venkatachalapathy, K. Rademann, T. Norby, T. G. Finstad
Summary: This study reports on the structural and electrical characterization of zinc oxide material containing aluminum prepared using a co-precipitation technique with different zinc and aluminum precursors. The resulting material exhibits a nanostructured form with significantly reduced thermal conductivity.
Article
Engineering, Environmental
Ruonan Min, Yanxia Wang, Xue Jiang, Rongchun Chen, Huijun Kang, Enyu Guo, Zongning Chen, Xiong Yang, Tongmin Wang
Summary: By doping Nb into ZrNiSn-based compounds, the thermoelectric and mechanical properties have been significantly improved, with enhanced power factor and reduced thermal conductivity. This research demonstrates the potential for industrial applications.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Multidisciplinary Sciences
Wuyang Ren, Wenhua Xue, Shuping Guo, Ran He, Liangzi Deng, Shaowei Song, Andrei Sotnikov, Kornelius Nielsch, Jeroen van den Brink, Guanhui Gao, Shuo Chen, Yimo Han, Jiang Wu, Ching-Wu Chu, Zhiming Wang, Yumei Wang, Zhifeng Ren
Summary: Studies have shown that vacancy-mediated anomalous transport properties are flourishing in various fields due to their fascinating effects on photoelectric, ferroelectric, and spin-electric behaviors in solid materials. In this study, the authors reveal the multifunctionality of vacancy in tailoring the transport properties of a defective half-Heusler ZrNiBi material, providing insights into the phononic and electronic transport processes. These findings not only demonstrate the potential of this thermoelectric material but also promote further exploration of vacancy-mediated transport properties.
NATURE COMMUNICATIONS
(2023)
Article
Physics, Applied
Kengo Kishimoto, Koji Akai, Kazuo Nagase, Atsushi Yamamoto
APPLIED PHYSICS EXPRESS
(2020)
Article
Energy & Fuels
Raju Chetty, Kazuo Nagase, Makoto Aihara, Priyanka Jood, Hiroyuki Takazawa, Michihiro Ohta, Atsushi Yamamoto
Article
Physics, Applied
Yoji Imai, Naomi Hirayama, Atsushi Yamamoto, Ken-ichi Takarabe
JAPANESE JOURNAL OF APPLIED PHYSICS
(2020)
Article
Chemistry, Inorganic & Nuclear
Haruno Kunioka, Kunihiro Kihou, Daichi Kato, Hidetomo Usui, Tsutomu Iida, Hirotaka Nishiate, Kazuhiko Kuroki, Atsushi Yamamoto, Chul-Ho Lee
INORGANIC CHEMISTRY
(2020)
Article
Energy & Fuels
Pawel Ziolkowski, Raju Chetty, Przemyslaw Blaschkewitz, Michihiro Ohta, Atsushi Yamamoto, Eckhard Mueller
Article
Multidisciplinary Sciences
Masayuki Murata, Kazuo Nagase, Kayo Aoyama, Atsushi Yamamoto, Yuya Sakuraba
Summary: The study developed a thermoelectric module utilizing the Nernst effect as a prototype and evaluated its performance, but thermoelectric modules operating with the Nernst effect have not been implemented yet. The proposed module achieved an output power of 0.48 mW at a temperature difference of 149 K in a 5 T magnetic field.
Article
Instruments & Instrumentation
Xiaokai Hu, Xixi Liu, Zuteng Guo, Liming Zhu
Summary: A commercial instrument has been demonstrated for the first time to extract the contact resistivity of thermoelectric legs, showing the variation of contact resistivity at different temperatures.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2021)
Article
Materials Science, Multidisciplinary
Shinichi Fujimoto, Kazuo Nagase, Hironori Ohshima, Masayuki Murata, Atsushi Yamamoto, Chul Ho Lee
Summary: Thermoelectric power generation is a promising technology for converting waste heat into electrical energy. Researchers have successfully developed a thermoelectric module without electrodes, which demonstrates stable power generation performance and high conversion efficiency.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Thermodynamics
Minhyeok Lee, Gyeonghun Yoo, Junjie Peng, Shintaro Uchida, Atsushi Yamamoto, Yuji Suzuki
Summary: A novel micro thermoelectric power generation module has been proposed, which directly heats the hot junction of high-temperature plate-type TEG elements through localized catalytic combustion. The convection effect with unburned mixture flows is utilized to recover heat losses caused by heat conduction. The study shows that with the aid of the convection effect, temperature differences over 700 degrees C can be achieved between the hot/cold junctions while maintaining a low unreacted fuel concentration.
APPLIED THERMAL ENGINEERING
(2023)
Article
Chemistry, Physical
Kazuki Imasato, Philipp Sauerschnig, Shashwat Anand, Takao Ishida, Atsushi Yamamoto, Michihiro Ohta
Summary: In this study, triple half-Heusler compound Mg2VNi3Sb3 with unconventional valence balance strategy was successfully synthesized. It exhibits semiconductor behavior with a small bandgap and low lattice thermal conductivity. This research demonstrates a new strategy for further improvement of thermoelectric performance and extended tunability of intermetallic compounds.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Nanoscience & Nanotechnology
Daisuke Ohori, Min-Hui Chuang, Asahi Sato, Sou Takeuchi, Masayuki Murata, Atsushi Yamamoto, Ming-Yi Lee, Kazuhiko Endo, Yiming Li, Jenn-Hwan Tarng, Yao-Jen Lee, Seiji Samukawa
Summary: By controlling the gaps between nanowires, phonon transport in the lateral direction can be regulated, preventing phonon transportation from the drain region and potential heat generation. This structure represents a promising solution for heat management in advanced CMOS devices.
IEEE OPEN JOURNAL OF NANOTECHNOLOGY
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
Daisuke Ohori, Masayuki Murata, Atsushi Yamamoto, Kazuhiko Endo, Min-Hui Chuang, Ming-Yi Lee, Yiming Li, Jenn-Hwan Tarng, Yao-Jen Lee, Seiji Samukawa
Summary: The research team demonstrated a thermally managed Si nanopillar/SiGe composite structure, achieving a 1/100 times lower thermal conductivity compared to Si bulk through phonon transport control. Thermal conductivity measurements showed that the nanopillar structure could eliminate electron-phonon scattering, offering a promising solution for advanced CMOS technologies.
2021 IEEE 21ST INTERNATIONAL CONFERENCE ON NANOTECHNOLOGY (IEEE NANO 2021)
(2021)
Article
Chemistry, Inorganic & Nuclear
Aichi Yamashita, Kunihiro Kihou, Haruno Kunioka, Hirotaka Nishiate, Atsushi Yamamoto, Yosuke Goto, Yoshikazu Mizuguchi, Tsutomu Iida, Yoshihiko Takano, Chul-Ho Lee
JOURNAL OF SOLID STATE CHEMISTRY
(2020)
Article
Engineering, Multidisciplinary
Sicheng Jiao, Shixiang Wang, Minge Gao, Min Xu
Summary: This paper presents a non-contact method of thickness measurement for thin-walled rotary shell parts based on a chromatic confocal sensor. The method involves using a flip method to obtain surface profiles from both sides of the workpiece, measuring the decentration and tilt errors of the workpiece using a centering system, establishing a unified reference coordinate system, reconstructing the external and internal surface profiles, and calculating the thickness. Experimental results show that the method can accurately measure the thickness of a sapphire spherical shell workpiece and is consistent with measurements of other materials.
Article
Engineering, Multidisciplinary
Rajeev Kumar, Sajal Agarwal, Sarika Pal, Alka Verma, Yogendra Kumar Prajapati
Summary: This study evaluated the performance of a CaF2-Ag-MXene-based surface plasmon resonance (SPR) sensor at different wavelengths. The results showed that the sensor achieved the maximum sensitivity at a wavelength of 532 nm, and higher sensitivities were obtained at shorter wavelengths at the expense of detection accuracy.
Article
Engineering, Multidisciplinary
Attilio Di Nisio, Gregorio Andria, Francesco Adamo, Daniel Lotano, Filippo Attivissimo
Summary: Capacitive sensing is a widely used technique for a variety of applications, including avionics. However, current industry standard Capacitive Level Sensors (CLSs) used in helicopters perform poorly in terms of sensitivity and dynamic characteristics. In this study, novel geometries were explored and three prototypes were built and tested. Experimental validation showed that the new design featuring a helicoidal slit along the external electrode of the cylindrical probe improved sensitivity, response time, and linearity.
Article
Engineering, Multidisciplinary
Kai Yang, Huiqin Wang, Ke Wang, Fengchen Chen
Summary: This paper proposes an effective measurement method for dynamic compaction construction based on time series model, which enables real-time monitoring and measurement of anomalies and important construction parameters through simulating motion state transformation and running time estimation.
Article
Engineering, Multidisciplinary
Hui Fu, Qinghua Song, Jixiang Gong, Liping Jiang, Zhanqiang Liu, Qiang Luan, Hongsheng Wang
Summary: An automatic detection and pixel-level quantification model based on joint Mask R-CNN and TransUNet is developed to accurately evaluate microcrack damage on the grinding surfaces of engineering ceramics. The model is effectively trained on actual micrograph image dataset using a joint training strategy. The proposed model achieves reliable automatic detection and fine segmentation of microcracks, and a skeleton-based quantification model is also proposed to provide comprehensive and precise measurements of microcrack size.
Review
Engineering, Multidisciplinary
Sang Yeob Kim, Da Yun Kwon, Arum Jang, Young K. Ju, Jong-Sub Lee, Seungkwan Hong
Summary: This paper reviews the categorization and applications of UAV sensors in forensic engineering, with a focus on geotechnical, structural, and water infrastructure fields. It discusses the advantages and disadvantages of sensors with different wavelengths and addresses the challenges of current UAV technology and recommendations for further research in forensic engineering.
Article
Engineering, Multidisciplinary
Anton Nunez-Seoane, Joaquin Martinez-Sanchez, Erik Rua, Pedro Arias
Summary: This article compares the use of Mobile Laser Scanners (MLS) and Aerial Laser Scanners (ALS) for digitizing the road environment and detecting road slopes. The study found that ALS data and its corresponding algorithm achieved better detection and delimitation results compared to MLS. Measuring the road from a terrestrial perspective negatively impacted the detection process, while an aerial perspective allowed for scanning of the entire slope structure.
Article
Engineering, Multidisciplinary
Nur Luqman Saleh, Aduwati Sali, Raja Syamsul Azmir Raja Abdullah, Sharifah M. Syed Ahmad, Jiun Terng Liew, Fazirulhisyam Hashim, Fairuz Abdullah, Nur Emileen Abdul Rashid
Summary: This study introduces an enhanced signal processing scheme for detecting mouth-click signals used by blind individuals. By utilizing additional band-pass filtering and other steps, the detection accuracy is improved. Experimental results using artificial signal data showed a 100% success rate in detecting obstacles. The emerging concepts in this research are expected to benefit radar and sonar system applications.
Article
Engineering, Multidisciplinary
Jiqiang Tang, Shengjie Qiu, Lu Zhang, Jinji Sun, Xinxiu Zhou
Summary: This paper studies the magnetic noise level of a compact high-performance magnetically shielded room (MSR) under different operational conditions and establishes a quantitative model for magnetic noise calculation. Verification experiments show the effectiveness of the proposed method.
Review
Engineering, Multidisciplinary
Krzysztof Bartnik, Marcin Koba, Mateusz Smietana
Summary: The demand for miniaturized sensors in the biomedical industry is increasing, and optical fiber sensors (OFSs) are gaining popularity due to their small size, flexibility, and biocompatibility. This study reviews various OFS designs tested in vivo and identifies future perspectives and challenges for OFS technology development from a user perspective.
Article
Engineering, Multidisciplinary
Yue Wang, Lei Zhou, Zihao Li, Jun Wang, Xuangou Wu, Xiangjun Wang, Lei Hu
Summary: This paper presents a 3-D reconstruction method for dynamic stereo vision of metal surface based on line structured light, overcoming the limitation of the measurement range of static stereo vision. The proposed method uses joint calibration and global optimization to accurately reconstruct the 3-D coordinates of the line structured light fringe, improving the reconstruction accuracy.
Article
Engineering, Multidisciplinary
Jaafar Alsalaet
Summary: Order tracking analysis is an effective tool for machinery fault diagnosis and operational modal analysis. This study presents a new formulation for the data equation of the second-generation Vold-Kalman filter, using separated cosine and sine kernels to minimize error and provide smoother envelopes. The proposed method achieves high accuracy even with small weighting factors.
Article
Engineering, Multidisciplinary
Tonglei Cao, Kechen Song, Likun Xu, Hu Feng, Yunhui Yan, Jingbo Guo
Summary: This study constructs a high-resolution dataset for surface defects in ceramic tiles and addresses the scale and quantity differences in defect distribution. An improved approach is proposed by introducing a content-aware feature recombination method and a dynamic attention mechanism. Experimental results demonstrate the superior accuracy and efficiency of the proposed method.
Article
Engineering, Multidisciplinary
Qinghong Fu, Yunxi Lou, Jianghui Deng, Xin Qiu, Xianhua Chen
Summary: Measurement and quantitative characterization of aging-induced gradient properties is crucial for accurate analysis and design of asphalt pavement. This research proposes the composite specimen method to obtain asphalt binders at different depths within the mixture and uses dynamic shear rheometer tests to measure aging-induced gradient properties and reveal internal mechanisms. G* master curves are constructed to investigate gradient aging effects in a wide range. The study finds that the composite specimen method can effectively restore the boundary conditions and that it is feasible to study gradient aging characteristics within the asphalt mixture. The study also observes variations in G* and delta values and the depth range of gradient aging effects for different aging levels.
Article
Engineering, Multidisciplinary
Min Li, Kai Wei, Tianhe Xu, Yali Shi, Dixing Wang
Summary: Due to the limitations of ground monitoring stations in China for the BDS, the accuracy of BDS Medium Earth Orbit (MEO) satellite orbits can be influenced. To overcome this, low Earth orbit (LEO) satellites can be used as additional monitoring stations. In this study, data from two LEO satellites were collected to improve the precise orbit determination of the BDS. By comparing the results with GPS and BDS-2/3 solutions, it was found that including the LEO satellites significantly improved the accuracy of GPS and BDS-2/3 orbits.