Journal of Materials Research and Technology-JMR&T
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2023
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IF 6.4
Jianwei Gao,Xiaoqing Si,Hanyue Ding,Xiaoyang Wang,Mushi Zheng,Chun Li,Junlei Qi,Jian Cao
Glass/Glass-ceramic sealing is always accompanied by issues of high porosity and brittle joints. To migrate these problems, an Ag foam was innovatively induced as an interlayer in the process of glass sealing the yttria-stabilized zirconia (YSZ) ceramic to Mn–Co spinel-coated Crofer 22 H stainless steel. Interlayer-added joints showed a significant reduction in porosity, and the shear strength was improved to 52.3 MPa, with an enhancement of 37.8 %. The influence of interlayer on the microstructure of the joint has been investigated and the formation process of the joint is illustrated. The Ag interlayer expels gases from the sealant material through expansion at high temperatures and promotes finer nucleation grains of crystallites integrating with the interlayer, reducing the porosity and alleviating the brittleness as well.
研究领域:
材料科学
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陶瓷工程
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连接技术
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固体氧化物燃料电池（SOFC）
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金属-陶瓷界面
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
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2013
·Vol. 2
·期 4
·1150-1158
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IF 0
Bin Hua,Meng Li,Bo Chi,Li Jian
Two types of anode were prepared for a comparative study of their electrochemical performance and carbon deposition resistance. The first one was the Ni–YSZ cermet anode; and the other, designated as the Ni–MnO/Ni–YSZ, was the Ni–YSZ anode plus an on-cell reforming layer of Ni–MnO in situ reduced from MnNi2O4 with a microstructure of fine Ni particles embedded in MnO matrix. With the Ni–MnO layer on the top surface, open circuit polarization resistance of the Ni–YSZ anode decreased approximately by 1/2 in H2-3 mol% H2O and by more than 1/3 in CH4-3 mol% H2O at temperatures ranging from 650 to 800 °C. Carbon fibers were observed in the Ni–YSZ anode, rather than in the Ni–MnO/Ni–YSZ anode, after initial impedance measurements in CH4-3 mol% H2O for 1 h. The polarization resistance of both anodes at 800 °C increased with time up to 6 h in CH4-3 mol% H2O due to carbon deposition; however, the carbon formed in the Ni–MnO/Ni–YSZ anode had a lower degree of graphitization. In the atmosphere of CH4-20 mol% H2O, carbon deposition was completely depressed in the Ni–MnO/Ni–YSZ anode at 800 °C and 200 mA cm−2, which ensured a higher and more stable electrochemical performance than that of the Ni–YSZ anode.
研究领域:
材料科学
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电化学
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能源工程
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催化
✓ 已验证
DOI
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Yuhui Chen,Ruolin Zhang,Shen Hu,Pengyang Jiang,Jun Song,Xiani Huang
In this study, the corrosion resistance and thermal shock resistance of Sc x Ta 0.5−x YSZ (x = 0, 0.05, 0.25, 0.45, and 0.5 mol%) coatings prepared via the solid-state reaction method were compared and evaluated. The corrosion resistance and thermal shock resistance of different materials were analyzed using X-ray diffraction, field-emission scanning electron microscopy, energy-dispersive spectrometry, and stereomicroscopy. Results show that Sc 0.25 Ta 0.25 YSZ has the best corrosion resistance and thermal shock resistance among all tested materials and the number of thermal cycles exceeds 679 at 1150 °C. The excellent properties can be attributed to the small ionic radius of Sc 3+ in the Sc 0.25 Ta 0.25 YSZ composite, which gives the material good thermal stability at high temperatures. In the corrosion process, Sc 0.25 Ta 0.25 YSZ forms highly stable zirconia tantalum , affording good corrosion resistance.
研究领域:
材料科学
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陶瓷
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高温材料
✓ 已验证
DOI
高影响因子
ENERGY & FUELS
·
2023
·
IF 5.3
Mengliang Gao,Jie Gao,Ge Pu,Cong Yuan,Xingqiang Lu
The redox activity and thermal stability of oxygen carriers (OCs) during multi-cycle processes are important performance criteria. In this paper, the effects of three supports, i.e., ZrO2, TiO2, and YSZ (yttria-stabilized zirconia), on the reactivity, redox stability, hydrogen recovery capacity, and purity, as well as the sintering behavior of La-modified CoFe2O4 (LCF) OCs, were investigated. The results indicated that the unsupported LCF had severe sintering behavior, the aggregation of grains, the collapse of pore structure, and surface densification after multiple cycles led to a significant reduction in its activity. Meanwhile, the interaction between different supports and active components had a remarkable influence on fuel conversion and hydrogen recovery capacity. The formation of Fe2TiO5 in LCF6T4 weakened the initial reduction activity of the OC. Also, phase separation occurred after multiple cycles, forming separated Fe2O3 and TiO2, which further accelerated the sintering and resulted in irreversible deactivation. In contrast, LCF6Z4 and LCF6YZ4 exhibited excellent initial activity and cyclic stability, which was attributed to their improved pore structure and surface properties. Interestingly, the generated La2Zr2O7 pyrochlore structure was also conducive to the enhancement of cyclic stability properties for OCs. In addition, all OCs displayed high-purity hydrogen (>99.5%) generation properties. Overall, the ion-conductive YSZ-supported OC showed excellent reactivity and stability. After 11 cycles, the fuel conversion deactivation and hydrogen production deactivation for LCF5YZ5 were merely 6.23 and 8.26%, respectively.
研究领域:
化学工程
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材料科学
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能源技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Yucheng Lv,Tao Yang,Xinmei Hou,Zhi Fang,Karthikeyan Rajan,Yao Di,Wenkun Peng,Yiqun Deng,Tongxiang Liang
Yttrium-stabilized zirconia@reduced graphene oxide (YSZ@rGO) nanofibers with uniform porous structure were prepared by electrospinning and thermal reduction process. On this basis, PEDOT/YSZ@rGO electrode was fabricated via the electrodeposition for sensitive detection of methyl parathion (MP). Among this, YSZ exhibited outstanding adsorption, rGO improved electron mobility and PEDOT enhanced electrocatalytic properties. The electrochemical impedance spectroscopy (EIS), square wave voltammetry (SWV) and cyclic voltammetry (CV) demonstrated the successful preparation of the sensor. The pH value of the buffer, the pre-deposition time of the working electrode, and the adsorption time have been optimized. Under the optimum condition, the detection limit of the sensor is 1.57 ng·mL −1 (S/N = 3), and the linear detection ranges from 5 to 4000 ng·mL −1 , which is superior to most related electrochemical sensors . Furthermore, the sensor exhibits good anti-interference, reproducibility, stability, and satisfactory recovery in real sample, indicating wide commercial applications in detecting food safety and monitoring wastewater emission.
研究领域:
材料科学
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电化学
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环境科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）