CERAMICS INTERNATIONAL
·
2024
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IF 5.1
Yuxin Xiao,Aihu Feng,Junge Chen,Qianying Cao,Le Mi,Yang Yu,Yanfeng Gao,Yun Yu
In this study, the viability of MgGa 2 O 4 as a pigment for thermal control coatings is discussed. Notably, the MgGa 2 O 4 based coating exhibited excellent initial optical properties and irradiation stability. After irradiation with 40 keV proton at a dose of 1.4 × 10 14 P/cm 2 , the optical performance of the coating remained essentially unchanged, while the solar absorption of the coating is still maintained below 0.10 after irradiation with 40 keV electron at a dose of 1.6 × 10 16 e/cm 2 . Further, the mechanism of the optical changes induced by electron irradiation was elucidated through experimental and computational methods. In MgGa 2 O 4 lattice, two different types of oxygen vacancies and a transition process of them were found. This process was accompanied by the leakage of some oxygen atoms from the lattice, leading to an increased number of color centers and the change in optical properties. Despite the solar absorption raised after electron irradiation , the MgGa 2 O 4 based thermal control coating showed minimal change and low end-of-irradiation-life values, which suggests that they have excellent stability and promising applications.
研究领域:
材料科学
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航天工程
·
光学
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产品关联
DOI
高影响因子
Nanoscale
·
2018
·Vol. 10
·期 47
·22335-22347
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IF 7.233
Vitaly Neshchimenko,Chundong Li,Mikhail Mikhailov,Jinpeng Lv
Zinc oxide has multifunctional physical properties depending on its microstructure and morphology. Herein, we reported the in situ investigations of the radiation stability of ZnO particles with hollow, ball, star and flower shapes under electron and proton irradiation. 100 keV protons with a fluence of 5 × 1015 cm−2 and 50 keV electrons with fluence ranging from 0.5 to 7 × 1016 cm−2 are employed to investigate the radiation stability of nanostructured ZnO particles. In situ reflectance, X-ray photoelectron spectra and photoluminescence were characterized in the irradiation environment to avoid the effects of the atmospheric environment on radiation induced defects. The experimental results reveal that, compared to the other shapes, the hollow structure with the best radiation stability due to the hollow structure facilitates the decrease of the accumulation of radiation defects. This study clearly demonstrates the promise of ZnO hollow particles as a plasmonic nanostructure for achieving high radiation stability, and they could be easily employed to serve as the radiation stability pigment for coatings.
研究领域:
材料科学
·
纳米技术
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
·
2023
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IF 5.2
Jinpeng Lv,Jiadi Xie,Neshchimenko Vitaly
Implementation of lightweight and long-lasting thermal-control coatings (TCCs) is vital for regulating the surface temperature and energy consumption of spacecraft. Herein, Zn 2 SiO 4 and hexagonal boron nitride (hBN) based inorganic TCCs are developed with potassium silicate binder. The α s /ε H (solar absorptance/ hemispherical emittance) ratio of the Zn 2 SiO 4 , ZnO and hBN coatings are 0.096, 0.190 and 0.107, respectively. Compared to the classical ZnO based Z-93 coating, both Zn 2 SiO 4 /K 2 SiO 3 and hBN/K 2 SiO 3 coatings show superior initial thermophysical properties. After vacuum-proton irradiation, the α s of Zn 2 SiO 4 , Z-93 and hBN coatings increased from 0.091, 0.167 and 0.098 to 0.193, 0.253 and 0.241, respectively. Apparently, the as-developed Zn 2 SiO 4 coating exhibits exceptional heat-dissipation and radiation-resistance features in relation to the hBN and Z-93 TCCs.
研究领域:
材料科学
·
航天工程
✓ 已验证
产品关联
DOI
高影响因子
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
·
2017
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IF 1.109
M.M. Mikhailov,V.V. Neshchimenko,C. Li,V.A. Vlasov
The effect on band gap (E g ) and crystal structure of ZnO modified by Al 2 O 3 , ZrO 2 , SiO 2 , CeO 2 , TiO 2 and Y 2 O 3 nanoparticles at concentrations less than 30 wt% has been investigated. Established that change of E g reach to 0.03 eV and determined by charge of cations and their radius, as well as the concentration of the nanoparticles. Lattice parameters changes at modifying by nanoparticles with a smaller and larger radius of cations than the ion Zn 2+ . Influence of 100 keV protons irradiation result in blue shift in absorption edge of polycrystalline zinc oxide modified by Al 2 O 3 , ZrO 2 , SiO 2 , CeO 2 , TiO 2 and Y 2 O 3 nanoparticles.
研究领域:
材料科学
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物理学
✓ 已验证
产品关联
DOI
高影响因子
TRIBOLOGY INTERNATIONAL
·
2022
·
IF 5.62
Yang Lei,Liping Zhang,Liang Zhou,Jiaxin Yu,Gai Zhao,Lihe Guo,Ding Zhang,Huimin Qi
The effects of proton irradiation on the tribological performance of polyimide (PI) composites filled with carbon nanotubes (CNTs) were explored. The results demonstrate that incorporating CNTs into PI decreased the friction coefficients of the composites after they were exposed to proton irradiation. In particular, the addition of 1.0 wt% CNT reduces the friction coefficient by up to 58.8%, which is attributed to the generation of a protective tribofilm. Further analysis of FIB-TEM images demonstrates that polymers and hydrogenated amorphous carbon promote the tribofilm growth, and improve the lubrication properties of the composites. Whereas, the proton radiation-induced mechanical changes result in the poor wear resistance of the PI composites.
研究领域:
材料科学
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摩擦学
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产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2020
·
IF 3.784
Mikhailov Mikhail,Iurina Victoria,Neshchimenko Vitaly,Li Chundong
The effects of proton (E = 100 keV, F = 5 × 10 15 сm −2 ) exposure on the reflective spectra of Al 2 O 3 , CeO 2 , TiO 2 , Y 2 O 3 , ZrO 2 , ZnO micro- and nanopowders in wavelength range from 250 to 2500 nm have been investigated. It has been established that titanium dioxide nanopowders have higher radiation stability to protons exposure in comparison with the other white powders (TiO 2 , Y 2 O 3 , Al 2 O 3 , ZnO, ZrO 2 ) used as pigments for coatings. This effect is caused by high specific surface area of the nanoparticle causing fast recombination processes of electrons and holes in various surface drains.
研究领域:
材料科学
·
核物理学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Jie Peng,Xiaoyu Pan,Peng Fei Hou,Bo Li
The pyroelectric-piezoelectric dual-mode sensor simultaneously decodes temperature and strain, serving as a core component for health monitoring, human-machine interfaces, and bionic skin applications. To achieve high fidelity, self-powering, and long-term endurance, the sensing materials must balance sensitivity, stability, and multi-physics field coordination across multiple scales. This study employs a synergistic strategy combining barium titanate (BaTiO3) doping with proton irradiation to regulate polyvinylidene fluoride-trifluoroethylene copolymer (P(VDF-TrFE)). By enhancing crystallinity and β-phase content of P(VDF-TrFE) while introducing oxygen vacancies and lattice distortions within the BaTiO3 lattice, the strategy significantly strengthens interfacial polarization coupling and charge transport efficiency. As a result, doping with 2wt% BaTiO3 increases pyroelectric coefficient (p) to 66.1 μC/m2•K. Although piezoelectric coefficient (d33) slightly decreases from 22.0 pC/N to 20.1 pC/N, its variation range (standard deviation) narrows from 3.9 to 3.1. Subsequent proton irradiation at 1×1010 p/cm2 further increases p to 86.6 μC/m2•K, accompanied by a slight decrease in d33. At 5×1010 p/cm2 fluence, p maintains a 6.8% increase compare to pre-irradiation levels, and d33 recovers to 20.0 pC/N with a standard deviation reduced to 2.4, effectively balancing piezoelectric uniformity and stability with high pyroelectric sensitivity. The composite film exhibits a linear sensitivity of 1.2 V/K over a temperature range of 0.1-12.2 K, with no degradation observed after 103 thermal cycles. It conformally adheres to the human body and enables real-time analysis of respiration, pulse, and touch signals, offering a novel approach for high-sensitivity, high-reliability dual-mode sensing in wearable electronics and bionic skin applications.
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）