CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Junge Chen,Yang Yu,Aihu Feng,Le Mi,Huixin Xiu,Yun Yu
Thermal control coatings (TCCs) are an essential part of the thermal control systems in the spacecraft. Solar absorptance and emittance are the key performance parameters of TCCs. To develop an ultra-low solar absorption and stable inorganic TCCs for surface radiator, different TCCs were prepared by co-sintering ZnO and SiO 2 nanoparticles to form Zn 2 SiO 4 /SiO 2 pigment in this work, and the optical properties and radiation stability were systematically studied. It is found that the coating based on composite pigment has high reflectivity in the ultraviolet band and excellent optical performance possessing the low solar absorption of 0.06. In addition, the Zn 2 SiO 4 /SiO 2 coating demonstrates the highest proton and electron radiation stability because that SiO 2 between Zn 2 SiO 4 particles acts as the relaxation center of the defects caused by radiation.
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
CERAMICS INTERNATIONAL
·
2024
·
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
·
航天工程
·
光学
✓ 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
·
2022
·
IF 1.279
Tao Li,Hongjun Kang,Songtao Lu,Wei Qin,Xiaohong Wu
As space exploration moves further and further into deep space, it is a big challenge to develop antistatic inorganic thermal control coating with lightweight and strong adhesion to substrates. Herein, this work reported an inorganic antistatic AZO/Al 2 O 3 -ZnO-Y 2 O 3 composite coating fabricated by PEO combined with ALD methods. The results show that when the Zn/Al ratio of deposited AZO film is 24:1, its overall performance is the optimal, and the emissivity, absorptivity and resistivity are 0.892, 0.409 and 1.15 × 10 –3 Ω·cm, respectively, which can meet thermal control application requirements of spacecraft. Furthermore, the AZO/Al 2 O 3 -ZnO-Y 2 O 3 composite coating shows a good electron-resistance irradiation performance, which is because AZO conductive film is easy to generate free carriers, speed up some electron transport and make electrons better disperse and conduct, thus reducing the penetration depth of electron irradiation. This work provides a material basis for thermal control system of spacecraft with long life and high reliability.
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
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
·
2023
·
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
Surfaces and Interfaces
·
2025
·
IF 6.3
Henghao Liu,Guangyao Hou,Hongjun Kang,Xinzhi Wang,Xiaohong Wu,Wei Qin
Thermal control coatings (TCCs) play a crucial role in managing the temperature of spacecraft. However, most of the reported organic TCCs have a relatively high ratio of solar absorptivity to emissivity ( α s / ε ) and their space stability still needs to be improved, which cannot meet the thermal control requirements of future miniaturized and integrated spacecraft. Therefore, it is urgent to develop high-performance organic antistatic TCCs. Herein, hierarchically porous ZrO 2 @AZO-acrylate (ZrO 2 @AZO-ACR) antistatic TCCs were synthesized by combining the atomic layer deposition (ALD) technology and the non-solvent polarity difference induced phase separation method. The developed coating by using water and ethanol mixed solvents exhibits excellent thermal control performance ( α s ∼0.118, α s / ε ∼0.132) and a low volume resistivity (2.5 × 10 6 Ω·m). Both experimental results and FDTD simulations indicate that the presence of a hierarchically porous structure with a wider size distribution and a high content of large-sized micropores enhances the scattering efficiency within the solar spectrum, thereby increasing the solar reflectivity of the ZrO 2 @AZO-ACR coating. Furthermore, the obtained ZrO 2 @AZO-ACR antistatic coating demonstrates strong adhesion to multi-substrate materials and good space stability under electron irradiation, UV irradiation and extreme temperatures. This study provides a novel strategy for preparing high-performance TCCs with good space stability.
研究领域:
材料科学
·
航天工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 21
·13261-13266
·
IF 4.036
Tao Li,Hongjun Kang,Songtao Lu,Wei Qin,Xiaohong Wu
As deep space exploration moves farther and farther away, thermal control coating of the in-orbit spacecraft will suffer a serious vacuum-ultraviolet radiation environment, which seriously threatens the reliability of the spacecraft in orbit. Therefore, it is important to improve the vacuum-ultraviolet resistance performance of the thermal control coating. In this work, the inorganic Al2O3–ZnO–Y2O3 thermal control coating was in situ fabricated on a 6061 aluminum alloy surface by PEO technology, and its vacuum-ultraviolet resistance performance was investigated. The results show that the Al2O3–ZnO–Y2O3 thermal control coating has a good resistance performance to vacuum-ultraviolet radiation, which is mainly because the large extinction coefficients of the ZnO and Y2O3 materials in the ultraviolet band are conducive to improving the ultraviolet resistance performance. Furthermore, the life prediction model of the Al2O3–ZnO–Y2O3 thermal control coating shows that its Δαs value first slightly increases and then tends to be stable with the increase of ultraviolet irradiation time from 0 ESH to 25 000 ESH, and the maximum variation of Δαs is about 0.0536. This work provides a material basis and technical support for the thermal control system of spacecraft with long life and high reliability.
研究领域:
材料科学
·
航天工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）