Additive Manufacturing
·
2024
·
IF 10.3
Shuaipeng Wang,Jintai Fan,Beining Li,Tao Feng,Xiaofeng Wang,Xiaobo Xiong,Jiangchun Li,Benxue Jiang,Long Zhang,Jin He,Fei Li
3D printing of transparent ceramics has attracted great attention recently but faces the challenges of limited compositional system and low transparency. Herein, transparent Y 2 O 3 -MgO nanocomposite ceramics with transmittance reaching 98.5 % of the theoretical limit are successfully fabricated using a materials extrusion-based 3D printing method assisted by hot isostatic pressing and the critical factors governing the superior printability and transparency are revealed. Various complex-shaped transparent nanocomposite ceramics are printed at a high resolution of 200 µm. The 3D printed transparent ceramics demonstrate fairly good infrared imaging ability, which significantly enhance its temperature resistant compared with classical infrared transparent sapphire ceramics. Compared with other 3D printed single phase transparent ceramics, the printed multi-phases transparent nanocomposite ceramics have the advantages of design complex microstructure for a targeted set of improved properties, including but not limited to mechanical properties, thermal stability, chemical resistance and optical properties , have great potential to be used in various advanced optical device under harsh environments.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Ajiao Liu,Zhe Tang,Lexing Liang,Yucheng Ye,Shiwei Deng,Haifeng Yuan,Jianqi Qi,Tiecheng Lu
Via a powder pretreatment process, transparent La 0.4 Gd 1.6 Zr 2 O 7 ceramics were successfully fabricated through the aqueous AM (acrylamide) gel-casting technique. Our research shows that the water absorption of La 2 O 3 has significant influence on the viscosity of slurry, leading to low density of the green body and poor transparency of ceramic. By pretreating the mixed powder via a solid-state reaction, the viscosity and pH results have shown that the single-phase pretreated powder has a positive improvement on the gel-casting process. Compared with the mixed powder, the pretreating method has effectively improved the slurry with higher solid content and lower viscosity. Therefore, the pretreated powder combined with gel-casting method have a positive influence on the density of green body and the optical quality of obtained La 0.4 Gd 1.6 Zr 2 O 7 ceramics. The polished ceramics with 40 mm in diameter (Ø = 40 mm) and 1.5 mm in thickness (δ = 1.5 mm) exhibited the in-line transmittance of 78% at 1100 nm and a maximum transmittance of about 80% in the infrared region, as well as a wide range of high stable transmittance among 0.6–6.0 µm wavelength. Our work opens a way for highly transparent ceramic preparation by aqueous AM gelling system with hygroscopic rare earth oxide as raw materials.
研究领域:
材料科学
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光学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Industrial Textiles
·
2022
·
IF 2.926
Yang Lei,Rong-Rong Cai,Rui-Qi Lin,Li-Zhi Zhang
Face masks are commonly used to protect an individual’s respiratory system from inhaling fine particulate matter (PM2.5) in polluted air, as well as the airborne pathogens, especially during the ongoing coronavirus disease 2019 (COVID-19) pandemic. However, all conventional masks with anti-PM2.5 function suffer from insufficient facial thermal comfort, particularly in a hot and humid environment. Herein, we demonstrated a novel infrared-transmittance visible-opaque PM2.5 media for radiative cooling utilizing rutile titanium dioxide particle-embedded polyamide 6 (PA6-TiO2). The transmission of visible light and infrared and PM2.5 removal performance of composite media containing a variety of microstructures, such as TiO2 particles of varying sizes, shapes, and contents, were numerically examined to determine the optimal ranges. Then the PA6-TiO2 media was effectively electrospun by controlling the arrangement of fibers and the morphology of TiO2 particles. By transmitting more than 85% of the thermal radiation from the human body and selectively blocking solar irradiance, the developed PA6-TiO2(flower-shaped) media cooled the simulative skin by 10.3°C as compared with commercial masks under strong solar irradiance. Additionally, they demonstrated a high PM2.5 removal efficiency of 95.3%, a low air resistance of 22.5 Pa (at 5.3 cm/s), and a sound water vapor transmission rate of 0.0169 g cm−2 h−1. This study presents an effective strategy for making thermally comfortable anti-PM2.5 masks, which will significantly benefit the public health prevention and control.
研究领域:
材料科学
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环境科学
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公共卫生
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2023
·
IF 3.5
Chaoqun Zhang,Minghui Zhang,Kun Chen,Xuechao Liu,Yinghui Shi,Xiangyuan Wang,Jiabao Wan,Sheng Cui
A new mid-infrared fluoroaluminate-tellurite glass with low hydroxyl absorption coefficient and high visible-infrared transmittance was fabricated by the high temperature melt casting method. The melting equipment was innovatively designed by placing lift furnaces in the glove box filled with dry oxygen to assure waterless preparation. The glass prepared in the glove box had low hydroxyl absorption coefficients (0.09 cm −1 ), validating the effectiveness of the water removal equipment. The glass was obtained with excellent thermal stability (T g > 450 °C) and good resistance to crystallization based on thermodynamic analysis (ΔT > 100 °C). The transmittance of glass maintained 80–91.30 % from 371 to 5572 nm, achieving high transmittance in multi-waveband. The glass had excellent optical and composition homogeneity indicated by refractive index and EDAX. The results showed that this glass had high thermal stability, visible-infrared transmittance and optical homogeneity, making it a good candidate for multi-waveband optical window materials.
研究领域:
材料科学
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光学工程
✓ 已验证
DOI
高影响因子
iScience
·
2022
·
IF 6.107
Meijie Chen,Dan Pang,Hongjie Yan
Passive daytime radiative cooling (PDRC) can dissipate heat to outer space with high solar reflectance ( R ¯ solar ) and thermal emittance ( ε ¯ LWIR ) in the atmospheric transmission window. However, for the non-contact heat dissipation, besides the high R ¯ solar , a high infrared transmittance ( τ ¯ LWIR ) is needed to directly emit thermal radiation through the IR-transparent coating to outer space. In this work, An IR-transparent porous PE (P-PE) coating with R ¯ solar = 0.96 and τ ¯ LWIR = 0.88 was prepared for non-contact heat dissipations. Under the direct sunlight of 860 W m −2 , the IR-transparent coating obtained a 4°C lower heater temperature than the normal PDRC coating under the same condition. In addition, the spectral reflectance of the P-PE coating after immersing in air or water changed little, which showed excellent durability for long-term outdoor applications. These results indicate the P-PE coating can be a potential IR-transparent coating for non-contact heat dissipations under direct sunlight.
研究领域:
材料科学
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能源工程
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光学工程
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2015
·Vol. 44
·期 46
·19856-19864
·
IF 4.197
Kui Wu,Xin Su,Zhihua Yang,Shilie Pan
A series of new metal chalcongenides, BaCdSnSe4 (1), Ba2SnSe4 (2), Mg2GeSe4 (3), and Ba2Ge2S6 (4), were successfully synthesized for the first time. Among them, compounds 2 and 4 were prepared by a molten flux method with Zn as the flux. In their structures, all of them have MQ4 (M = Sn, Ge; Q = S, Se) units. For compound 1, the CdSe4 and SnSe4 groups are connected to form CdSnSe6 layers and these layers are linked together by the Ba atoms. Compounds 2 and 3 are composed of isolated MSe4 (M = Sn, Ge) units and charge-balanced by the Ba or Mg atoms, respectively, while compound 4 has infinite ∞(GeS3)n chains, which is different from the structures of the other three compounds that only have isolated MSe4 (M = Sn, Ge) units. The measured IR and Raman data of the title compounds show wide infrared transmission ranges. The experimental band gaps of compounds 1, 2, and 3 were determined to be 1.79, 1.90, and 2.02 eV, respectively. Band structures were also calculated and indicate that their tetrahedral units, such as [SnSe4], [GeS4] and [GeSe4], determine the energy band gaps of the title compounds, respectively. As for compound 1, based on fundamental light at 2.09 μm, the experimental second harmonic generation (SHG) response is about 1.6 times that of the benchmark AgGaS2, which is also consistent with the calculated value. Based on the above results, compound 1 has promising applications in the IR field as a NLO material.
研究领域:
材料科学
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凝聚态物理
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无机化学
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光学工程
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功能材料
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2025
·
IF 6.2
Xincheng Cai,Junjing Duan,Zhangyi Huang,Lexing Liang,Zhenyu Zhang,Mao Deng,Jianqi Qi,Tiecheng Lu
Y 2 O 3 MgO composites have emerged as promising mid-infrared (MIR) materials owing to their exceptional broadband transmittance and remarkable thermal stability at elevated temperatures. Nevertheless, the presence of uncontrollable absorption bands within the 4–7 μm spectral range, compromises their optical performance in advanced MIR systems. To address this limitation, we systematically investigated annealing as a strategic approach for modulating defect chemistry in oxide composites. In this paper, the absorption peaks of Y 2 O 3 MgO composites were controlled by varying the annealing conditions. As the annealing temperature increases from 600 °C to 1100 °C, the absorption peaks of Y 2 O 3 MgO composites gradually shift from ∼4.9 μm to ∼6.8 μm, with a transition temperature ∼900°C. This behavior is attributed to the oxidation of metal-organic coordination (MOC) to CO 3 2- in high-temperature air. Ultimately, Y 2 O 3 MgO composites featuring controllable absorption peaks were obtained, demonstrating a transmittance of ∼81 % at 7 μm - the highest value ever reported for this composite system, which broadens the potential application space, particularly in fields requiring mid-infrared transparency such as gas detection, materials characterization, and biomedical imaging. This study not only elucidates specific strategies for enhancing the performance and microstructure of Y 2 O 3 MgO composites but also furnishes reliable methodologies and datasets to support the annealing processes of other material systems.
研究领域:
材料科学
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光学材料
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陶瓷
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红外技术
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固态化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 43
·22745-22753
·
IF 11.301
Kang Yan,Xiao Li,Xiao-Xiong Wang,Miao Yu,Zhiyong Fan,Seeram Ramakrishna,Han Hu,Yun-Ze Long
Children often face more dangers than adults because of their unsound awareness of self-protection. Ensuring that modern technology is child safe has become an important research field. Conventional household electricity is dangerous for babies due to its high voltage. Considering that babies like to bite, some common low-voltage energy sources, such as lithium-ion batteries, also present certain risks. Therefore, the development of non-toxic and harmless energy sources for children is urgently needed. Considering that children tend to be more active than adults, nanogenerators are ideal for such applications, due to their effective use of abundant mechanical energy, and they will not cause the risk of electric shock or poisoning by accidental swallowing. Herein, we report a triboelectric nanogenerator (TENG) based on carboxymethyl chitosan (CMCS) and carboxymethyl cellulose sodium (CMC-Na). The TENG can dissolve quickly when it encounters water, and it will not affect the environment after dissolution. We measured the electrical performance of the TENG with an effective area of 3 × 3 cm2 under a frequency of 2 Hz. The output power of this TENG can reach 120 mW m−2. Meanwhile, it contains no flavor, which avoids active consumption by children. It can continuously power electronic watches, temperature-hygrometers, and calculators. In addition, we confirmed the edibility of the TENG through feeding experiments. Even if a baby eats it by mistake, it will not affect the baby's health. The good infrared transmission effect allows this material to be used in baby diapers and other applications to dissipate heat and improve wearing comfort.
研究领域:
纳米技术
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材料科学
·
儿童安全
·
能量收集
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2024
·
IF 13
Kai Feng,Yanfei Ma,Lina Zhang,Yubo Liu,Yizhe Liu,Zhencai Xing,Xiaowei Pei,Yang Wu,Feng Zhou
Smart windows offer a sustainable solution for energy-efficient buildings by adapting to various weather conditions. However, the challenge lies in achieving precise control over specific sunlight bands to effectively respond to complex weather changes and individual needs. Herein, a novel electrochromic smart window fabricated by integrating a self-assembled cellulose nanocrystals (CNCs) layer with an electrochromic poly(3,4-ethylenedioxythiophene):poly(styrene sulfonic acid) (PEDOT:PSS) layer is reported, which exhibits high near-infrared transmittance, low solar reflectivity (26%), and infrared emissivity (20%) in winter, and low near-infrared transmittance, high solar reflectivity (91%), and infrared emissivity (≈94%) in summer. Interestingly, the material offers dynamic temperature control based on its photothermal properties, maintaining the internal temperature of buildings within a comfortable range of 20–25 °C from morning to night, particularly in winter with significant daily temperature fluctuations. Simulations show that the CNC-PED device demonstrates excellent energy-saving and CO 2 emission reduction capacities across various global climate zones. This study presents a feasible pathway for constructing season-adaptive smart windows, making them suitable for energy-efficient buildings.
研究领域:
材料科学
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能源工程
·
环境科学
·
建筑技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Ruixin Guo,Shu Guo,Mingjun Xia,Lijuan Liu,Minjuan Li,Sangen Zhao,Xiaoyang Wang
Ba1.09Pb0.91Be2(BO3)2F2 (BPBBF), a previously unreported lead-containing beryllium borate fluoride, has been successfully grown through a high-temperature flux method. Its structure is solved by single-crystal X-ray diffraction (SC-XRD), and it is optically characterized via infrared, Raman, UV–vis–IR transmission, and polarizing spectra as well. SC-XRD data suggests that it can be indexed by a trigonal unit cell (space group P3m1) with lattice parameters a = 4.7478(6) Å, c = 8.3856(12) Å, Z = 1, and V = 163.70(5) Å. This material could be considered as a derivative of the Sr2Be2B2O7 (SBBO) structural motif. It consists of 2D [Be3B3O6F3]∞ layers in the crystallographic ab plane, with divalent Ba2+ or Pb2+ cations serving as spacers among the adjacent layers. Ba and Pb were found to adopt a disordered arrangement in the trigonal prismatic coordination within the BPBBF structural lattice, which is evidenced by both structural refinements against SC-XRD data and energy dispersive spectroscopy. The UV absorption edge (279.1 nm) and birefringence (Δn = 0.054@ 546.1 nm) of BPBBF are confirmed by UV–vis–IR transmission and polarizing spectra, respectively. The discovery of this previous unreported SBBO-type material, BPBBF, along with other reported analogues such as BaMBe2(BO3)2F2 (M = Ca, Mg, and Cd), provide a prodigious example for tuning the bandgap, birefringence, and short UV absorption edge via simple chemical substitution.
研究领域:
材料科学
·
晶体学
·
光学材料
✓ 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）