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Chen, Wei (author), Liu, Xu (author), Hu, D. (author), Liu, X. (author), Zhu, Xi (author), Fan, Xuejun (author), Zhang, Kouchi (author), Fan, J. (author)During operation in environments containing hydrogen sulfide (H<sub>2</sub>S), such as in offshore and coastal environments, sintered nanoCu in power electronics is susceptible to degradation caused by corrosion. In this study, experimental and molecular dynamics (MD) simulation analyses were conducted to investigate the evolution and...journal article 2024
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Guo, Baotong (author), Wen, Minzhen (author), Tang, Hongyu (author), Lishik, Sergey (author), Fan, X. (author), Zhang, Kouchi (author), Fan, J. (author)MAlSiN<sub>3</sub>:Eu<sup>2+</sup> (M = Ca, Sr) is commonly used in high-power phosphor-converted white-light-emitting diodes and laser diodes to promote their color-rendering index. However, the wide application of this phosphor is limited by the degradation of its luminescent properties in high-temperature, high-humidity, and high-sulfur...journal article 2024
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Yun, Minghui (author), Yang, Daoguo (author), Cai, Miao (author), Yan, Haidong (author), Yu, Jiabing (author), Liu, Mengyuan (author), He, Siliang (author), Zhang, Kouchi (author)Metal-oxide-semiconductor field-effect transistors (MOSFETs) undergo fatigue degradation under high thermal and electrical stresses. This process results in changes in their parasitic parameters, which can be detected using frequency domain reflectometry (FDR). Frequency domain impedance analysis is employed to characterize the various...journal article 2024
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Zhang, Letian (author)Board-level reliability (BLR) looks at the reliability problem in the package and PCB interconnection, which is an important topic in microelectronics. The current criterion in the BLR test is to look if the connection is open, which can only detect the failure and there is no available method that can detect the degradation of the solder joints...master thesis 2023
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Inamdar, A.S. (author), van Soestbergen, Michiel (author), Mavinkurve, Amar (author), van Driel, W.D. (author), Zhang, Kouchi (author)Moulding compounds used for encapsulating electronics typically occupy a large portion of package volume and are most exposed to the external environment. Under harsh conditions such as high temperature, humidity, and mechanical vibrations, constituent materials of electronic components degrade, resulting in a change in their thermal, mechanical...conference paper 2023
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Hu, Zhi Yi (author), Lin, Yi Peng (author), Wang, Qing Ting (author), Zhang, Yi Xin (author), Tang, Jie (author), Wang, Shuai (author), van Loosdrecht, Mark C.M. (author), Zeng, Raymond Jianxiong (author), Zhang, Fang (author)By maintaining the cell integrity of waste activated sludge (WAS), structural extracellular polymeric substances (St-EPS) resist WAS anaerobic fermentation. This study investigates the occurrence of polygalacturonate in WAS St-EPS by combining chemical and metagenomic analyses that identify ∼22% of the bacteria, including Ferruginibacter and...journal article 2023
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Wen, Minzhen (author), Guo, Baotong (author), Chen, Shanghuan (author), Hu, X. (author), Fan, Xuejun (author), Zhang, Kouchi (author), Fan, J. (author)The (Ca, Sr) AlSiN₃:Eu²⁺(CSASN:Eu) red phosphor is widely used to improve color rendering of high-power phosphor-converted lighting diode (pc-WLED), but it is always unstable under high temperature and high humidity environments. Therefore, the studies on the temperature and humidity resistance of red phosphors and their aging mechanism have...conference paper 2023
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Ren, Jie (author), Zhang, Lihai (author), Zhu, Yingcan (author), Li, Z. (author), San Nicolas, Rackel (author)This study compares the degradation behavior of the alkali-activated slag/fly ash (AASF) and ordinary Portland cement (OPC) mortars exposed to phosphoric acid with different pH values. The experimental results show that AASF mortars exhibit better resistance than OPC mortars against surface damage, although both systems get white deposits on the...journal article 2022
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Jiang, Jing (author), Wang, S. (author), Liu, X. (author), Liu, Jianhui (author), Li, Jun (author), Zhou, Dexiang (author), Zhang, Kouchi (author), Ye, H. (author), Tan, C. (author)High electric-field stress is an effective solution to the recovery of irradiated devices. In this paper, the dependence of the recovery level on the magnitude of gate voltage and duration is investigated. Compared with the scheme of high gate-bias voltage with a short stress time, the transfer characteristics are significantly recovered by...journal article 2022
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Zhang, Zhao (author), Liu, Kai (author), Chong, Dan (author), Niu, D. (author), Lin, P. (author), Liu, X. (author), Niu, Yanhui (author), Jing, R. (author)To purify severe air pollution in traffic-intensive urban areas and tunnels, an innovative type of photocatalytic micro-surfacing mixture (PMM) was designed, which was enhanced by polypropylene (PP) fiber and nano-TiO<sub>2</sub>. In this work, the road performance of sixteen PMMs with the different contents of PP and nano-TiO<sub>2</sub>...journal article 2022
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Chen, Wei (author), Chen, Ye (author), Cao, Yixing (author), Cui, Z. (author), Fan, Xuejun (author), Zhang, Kouchi (author), Fan, J. (author)In a light-emitting diode (LED) package, silicone encapsulant serves as a chip protector and enables the light to transmit, since it exhibits the advantages of high light transmittance, high refractive index, and high thermal stability. However, its reliability is still challenged under harsh operation conditions. In this study, the optical...journal article 2022
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Zhang, Jie (author), Tan, Lirong (author), Hagedoorn, P.L. (author), Wang, Ruiqi (author), Wen, Li (author), Wu, Siwei (author), Tan, Xuemei (author), Xu, Hui (author), Zhou, Xing (author)Bisphenols are important industrial materials for example for the production of plastics, but are also well known for their adverse health effects, in particular bisphenol A (BPA) is an endocrine disruptor. The widespread use of plastics has raised concerns. Therefore, the removal of bisphenols from wastewater has sparked the interest of the...journal article 2022
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He, Yingdong (author), Zhou, Yuekuan (author), Wang, Zhe (author), Liu, Jia (author), Liu, Zhengxuan (author), Zhang, Guoqiang (author)Hydrogen-based (H<sub>2</sub>-based) interactive energy networks for buildings and transportations provide novel solutions for carbon-neutrality transition, regional energy flexibility and independence on fossil fuel consumption, where vehicle fuel cells are key components for H<sub>2</sub>-electricity conversion and clean power supply....journal article 2021
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Fan, J. (author), Jing, Zhou (author), Cao, Yixing (author), Ibrahim, Mesfin Seid (author), Li, Min (author), Fan, Xuejun (author), Zhang, Kouchi (author)With their advantages of high efficiency, long lifetime, compact size and being free of mercury, ultraviolet light-emitting diodes (UV LEDs) are widely applied in disinfection and purification, photolithography, curing and biomedical devices. However, it is challenging to assess the reliability of UV LEDs based on the traditional life test or...journal article 2021
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Bian, Dong (author), Zhou, Xiaochen (author), Liu, Jianing (author), Li, Wenting (author), Shen, Danni (author), Zheng, Yufeng (author), Gu, Wenda (author), Jiang, Jingjun (author), Li, Mei (author), Chu, Xiao (author), Ma, Limin (author), Wang, Xiaolan (author), Zhang, Yu (author), Leeflang, M.A. (author), Zhou, J. (author)Biodegradable stents can provide scaffolding and anti-restenosis benefits in the short term and then gradually disappear over time to free the vessel, among which the Mg-based biodegradable metal stents have been prosperously developed. In the present study, a Mg-8.5Li (wt.%) alloy (RE- and Al-free) with high ductility (> 40%) was...journal article 2021
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Yazdan Mehr, M. (author), Bahrami, A. (author), van Driel, W.D. (author), Fan, X.J. (author), Davis, J.L. (author), Zhang, Kouchi (author)In this paper, degradation mechanisms of optical materials, used in the light emitting diode (LED)-based products, are reviewed. The LED lighting is one of the fastest technology shifts in human history. Lighting accounts for almost 20% of the global electrical energy use, inferring that replacement of traditional lighting sources with LEDs...journal article 2020
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Guo, Y. (author), Markine, V.L. (author), Zhang, X. (author), Qiang, Weile (author), Jing, Guoquig (author)The performance and deformation of ballast bed are significantly influenced by the particle morphology (size and shape), the rheology (translation and rotation), and the degradation (breakage and abrasion). Regarding the ballast particle morphology, the ballast particle size is generally measured by sieving and described with the Particle Size...review 2019
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Guo, Y. (author), Markine, V.L. (author), Qiang, Weile (author), Zhang, Hui (author), Jing, Guoqing (author)Higher speed, more freight and frequent maintenance increase ballast degradation and reduce the ballast lifespan. To reduce ballast degradation, crumb rubber used as buffering aggregates in ballast bed is relatively unexplored and needs more studies, because using it has the advantage of reusing the waster rubber and absorbing the noises. The...journal article 2019
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Cai, Miao (author), Liang, Yonghu (author), Yun, Minghui (author), Chen, Xuan-You (author), Yan, Haidong (author), Yu, Zhaozhe (author), Yang, Daoguo (author), Zhang, Kouchi (author)A novel silicone rubber elastic key (SREK) is proposed in this paper for surface mounting technology (SMT) applications. Effects of thermal reflowing stress on the mechanical properties of SMT-SREKs are investigated. The manufactured SMT-SREKs, which underwent various reflowing conditions in advance, are subjected to pressing force and...journal article 2019
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Chen, Wei (author), Fan, J. (author), Qian, Cheng (author), Pu, Bin (author), Fan, Xuejun (author), Zhang, Kouchi (author)The inherent luminous characteristics and stability of LED packages during the operation period are highly dependent on their junction temperatures and driving currents. In this paper, the luminous flux of LED packages operated under a wide range of driving currents and junction temperatures are investigated to develop a luminous flux...journal article 2019
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