International Journal of Applied Ceramic Technology
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2022
·Vol. 20
·期 2
·747-753
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IF 2.328
Shen Zhenguang,Xiaohui Zhao,Muzhang Huang,Yi Han,Wei Pan
Fabrication of transparent or pore-free oxide ceramics usually requires sintering in a vacuum or reducing atmosphere. In the present paper, a near-infrared transparent Dy 2 Zr 2 O 7 ceramic was prepared by ordinary pressureless sintering under the air atmosphere, with a controlled pre-calcining of raw powders process. The key point of the process is to control the content of the phases by pre-calcination of the starting mixture of ZrO 2 and Dy 2 O 3 powders. The influence of pre-calcining temperature on the content of phases, the particle sizes, on the sinterability of the mixture of Dy 2 O 3 and ZrO 2 powders has been investigated. It was found that when the pre-calcination was conducted at 1200°C for 2 h, the powder contains 4 mol% Dy 2 Zr 2 O 7 , 18 mol% m-ZrO 2 , 30 mol% Dy 2 O 3 , and about 50 mol% t/c-ZrO 2 which is beneficial for the sintering of pore-free Dy 2 Zr 2 O 7 ceramics. The mechanism is discussed in the paper. The transparency of the sintered Dy 2 Zr 2 O 7 ceramic was measured, and their transmittance is about 63% at 1450 nm and 73% at 1900 nm. This work provides a simple and convenient way to prepare the near-infrared transparency ceramic without special sintering facilities.
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
Materials Today Energy
·
2021
·
IF 7.311
R. He,Y. Liao,J. Huang,T. Cheng,X. Zhang,P. Yang,H. Liu,K. Liu
Air-conditioning in buildings is energy intensive and takes up large proportion of global energy consumption. To pursue low energy expenditure, herein, we propose a radiant air-conditioning strategy with infrared transparent and low thermal conductive porous polyethylene aerogels . The aerogel allows direct heat exchange between the cooling panel and human body via radiation and avoids cooling the entire space. Compared with traditional space air conditioning, a 6-mm polyethylene aerogel–assisted radiant air-conditioning saves the electricity by 31% under the same cooling and ambient temperature. Moreover, high solar reflectance and low thermal conductivity of the porous polyethylene hold great promise of the strategy in working outdoors. Our calculation demonstrates two-thirds of energy saving compared with direct space cooling in a typical summer day in Wuhan. These results show great potential of the cooling method in building cooling both in closed spaces and open conditions.
研究领域:
材料科学
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能源工程
·
建筑环境
✓ 已验证
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2019
·Vol. 103
·期 4
·2663-2673
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IF 3.094
Boo-Hyun Choi,Dae-Su Kim,Ku-Tak Lee,Bum-Joo Kim,Jeong-Su Kang,Sahn Nahm
Hydrothermally synthesized ZnS nanopowders comprising small and large particles were used to synthesize ZnS ceramics. Small particles (200 nm) existed in the gaps between the large particles (0.7 μm) and assisted the densification of the ZnS ceramics. ZnS ceramics sintered at low temperatures (<1000°C) exhibited small grains with large grain-boundary areas that provided diffusion paths for carbon ions from the graphite mold, resulting in carbonate absorption bands. ZnS ceramics sintered at high temperatures (≥1000°C) for a long time (≥2.0 hours) exhibited a dense microstructure with very large grains (>500 μm). The ZnS liquid phase, which was formed at approximately 980°C, assisted the densification and grain growth of the ZnS ceramics. A 3.0-mm-thick ZnS ceramic sintered at 1000°C for 16 hours showed a high Knoop hardness (321 kgf/mm 2 ) and a high transmittance of 71% in the wavelength range 6.0-12 μm without carbonate absorption bands.
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
Nature Communications
·
2025
·Vol. 16
·期 1
·1-10
·
IF 15.7
Chen Zipeng,Zhang Qian,Ding Liping,Lv Guangxin,Liu Tianji,Yang Zhengwei,Jiang Yi,Li Longnan,Li Wei,Ding Feng,Xu Weilin,Zhu Jia,Zhu Bin
Infrared (IR)-transparent radiative cooling textiles show great promise for achieving personal thermal comfort and reducing energy consumption. However, besides a few synthetic fiber materials proposed as IR-transparent textiles, traditional textile materials used to achieve IR transparency have not been realized, impeding large-scale practical applications. Here, based on a common textile material Nylon 6 (PA6), we design a high drawing process with rapid solvent evaporation to achieve IR-transparent PA6 textiles. By altering the chain conformations and crystal structures, the molecular vibrations in the IR region (IR absorption) of PA6 can be significantly weakened. Meanwhile, this process also tailors the fiber to the nanoscale and minimizes IR reflection. Consequently, a human body covered by our textile can stay 2.1 °C cooler than with cotton, corresponding to ~20% indoor energy savings in cooling. We expect that our work offers an innovative pathway to regulate IR radiation for personal thermal management.
研究领域:
材料科学
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能源工程
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纺织科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Wen-Fa Chen,Bin-Wen Liu,Xiao-Ming Jiang,Guo-Cong Guo
Nonlinear optical (NLO) crystals can produce tunable lasers through the direct second-harmonic generation (SHG) process, which is of great significance in modern laser technology. Herein, a new chalcogenide β -PbGa 2 S 4 ( 1 ) crystallized in space group of Pna 2 1 was synthesized via high-temperature solid-state reactions. Compound 1 is composed of a three-dimensional framework [Ga 8 S 16 ] 8− with hexagonal voids filled by Pb atoms via covalent Pb–S interactions. Importantly, it exhibits promising NLO performances, such as phase-matchable SHG efficiency (0.6×AgGaS 2 @1200 nm and 0.1×AgGaS 2 @1910 nm), moderate band-gap (2.46 eV), suitable laser-induced damage threshold (3.0×AgGaS 2 ), and a broad IR transparency window (0.5–25.0 µm). SHG response of 1 is mainly attributable to the occupied S–3p and Ga–4p states and unoccupied S–3p and Pb–6p states.
研究领域:
材料科学
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光学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Jiazheng Zhou,Ling Luo,Yu Chu,Peng Wang,Zhiyong Guo,Xin Su,Junjie Li
The Pb x Sn 2−x SiS 4 series from 0 ≤ x ≤ 2 were investigated to study the influence of partial congener cationic substitution on structure and properties. While the centrosymmetric (CS) compounds Pb 2 SiS 4 and Sn 2 SiS 4 crystallizing in the centrosymmetric (CS) P 2 1 / c space group have been reported previously, the partial congener cationic substitution induced CS to noncentrosymmetric (NCS) structural transformation in this system and the formed NCS substitution variant PbSnSiS 4 are introduced here for the first time. PbSnSiS 4 crystallizes in P 2 1 space group with the cell parameters a = 6.4334(8) Å; b = 6.6912(8) Å, c = 8.5037(10) Å, β = 108.576(4) °, Z = 2. The title compound shows a strong second harmonic generation (SHG) response (~ 1.1 × AgGaS 2 ), high laser induced damage threshold (LIDT) (~3 × AgGaS 2 ), and wide IR transparent region from 0.58 to 16.85 µm (down to zero). What’s more, PbSnSiS 4 exhibits good crystal growth habits, and millimeter-scale single crystals (~ 2 × 2 × 1 mm 3 ) were obtained in a spontaneous crystallization way. The theoretical calculations indicate that the optical band gaps decrease with increasing Sn content from Pb 2 SiS 4 (1.94 eV), PbSnSiS 4 (1.82 eV), to Sn 2 SiS 4 (1.69 eV). The results give an insight into the exploration of new NCS compounds with the congener cationic substitution strategy.
研究领域:
材料科学
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光学
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DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2021
·Vol. 127
·期 1
·1-13
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IF 2.584
Xie Ping,Li Bin,Chen Gang,Zheng Weimin,Ma Xiaofeng,Luo Haihan,Liu Dingquan
The dielectric function of phase-change materials (PCMs) presents a tremendous difference for the amorphous and crystalline states. Therefore, the measurement of the mid-infrared transparency of thin films of PCMs will provide a cost-efficient method to reveal the dependence of amorphous-crystalline phase transition on their compositions. Although Sb–Te–Se system has shown the advantages of the high speed, low power consumption and long retention life, the information on the mid-infrared transparency of Sb–Te–Se thin films is still insufficient. In our investigation, combinatorial materials libraries of Sb–Te–Se thin films were synthesized. The composition and mid-infrared spectral transmittance of each pixel of Sb–Te–Se thin film in the library were characterized using the energy dispersive X-ray analysis (EDX) and Fourier-transform infrared (FTIR) spectrometer, respectively. The in-depth chemical composition for randomly selected pixels was identified using secondary ions mass spectroscopy (SIMS). The crystallographic structure of some pixels was also identified using micro-area X-ray diffraction (μ-XRD). It can be found that, with the change of composition in Sb–Te–Se thin films, their mid-infrared spectral transmittance can be organized into three distinctive groups, corresponding to amorphous Sb–Se, Sb 2 Se 3 orthorhombic structure and Sb 2 Te 3 rhombohedral structure, respectively. Therefore, the amorphous-crystalline phase transition and the phase-change from the orthorhombic structure of Sb 2 Se 3 to the rhombohedral structure of Sb 2 Te 3 can be completely reflected in the mid-infrared spectral transmittance of Sb–Te–Se thin films.
研究领域:
材料科学
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光学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2015
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IF 2.999
Guowu Tang,Qi Qian,Xin Wen,Guanxiang Zhou,Xiaodong Chen,Min Sun,Dongdan Chen,Zhongmin Yang
For the first time to the best of our knowledge phosphate glass-clad optical fibers comprising tellurium (Te) semiconductor core have been fabricated using a molten core approach. The cores were found to be highly crystalline and phase-pure as evidenced by X-ray diffraction (XRD) and corroborated by Micro-Raman spectrum. Elemental analysis across the core/clad interface suggests that there is some diffusion of oxygen and phosphorus into the core region and, conversely, diffusion of Te into the cladding region. Unfortunately, the propagation loss of the Te core fibers was too high to measure due to the significant scattering from the grain boundaries, oxygen and phosphor precipitates. However, the larger Raman gain, infrared and terahertz transparency of tellurium over silicon and germanium should make these fibers of significant value for fiber-based mid- to long-wave infrared, terahertz waveguides and Raman-shifted infrared light sources.
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 THE AMERICAN CERAMIC SOCIETY
·
2025
·
IF 3.8
Siyuan Cheng,Song Hu,Wenjie Wu,Jianghuai Yang,Pingsun Qiu,Xiyun He
A series of Bi-doped gadolinium iron garnet (Bi:GdIG) infrared-transparent ceramics were fabricated by a hot-press sintering process. The effects of Bi doping on the phase structure, microstructure and optical transmittance of GdIG ceramics were analyzed systematically. The grain size of Bi x Gd 3- x Fe 5 O 12 ( x = 0, 0.3, 0.6, 0.9) ceramic samples gradually decreased with the increase of Bi doping, and their optical transmittance gradually decreased, reaching about 70.7%, 62.9%, 56.9%, and 29.8% at 1550 nm, respectively. Meanwhile, the effects of Bi doping on the magnetic and magneto-optical properties of GdIG ceramics were investigated systematically. The saturation specific Faraday rotation angles ( θ F ) of the Bi x Gd 3- x Fe 5 O 12 ceramic samples reached about 51, −266, −595, and −968 deg./cm, respectively, which increased linearly with the increase of the Bi doping amount. The θ F increased by about 34 deg./cm for each 1 at% increase in the Bi doping amount, achieving comparable magneto-optical properties with Bi:GdIG single crystals produced by liquid phase epitaxy. It shows the bright prospects of Bi:GdIG ceramic materials in the field of magneto-optical applications.
研究领域:
材料科学
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光学
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2023
·Vol. 10
·期 12
·3595-3604
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IF 7
Yuheng She,Fei Liang,Jinmiao Jiao,Wenli Zhao,Ning Ye,Zhanggui Hu,Yicheng Wu,Conggang Li
Polymorphism is crucial for unraveling crystallization mechanisms, predicting crystal structures and discovering novel materials. A new high-symmetry polymorph of Li2TeMo3O12, β-Li2TeMo3O12, was identified successfully by a spontaneous crystallization technique, and it exhibits improved thermal stability and crystallizes in the trigonal space group R (No. 148) in contrast to the metastable α-Li2TeMo3O12. Thermal analysis and variable-temperature X-ray diffraction powder patterns demonstrated an irreversible phase transition of Li2TeMo3O12 from α-Li2TeMo3O12 to β-Li2TeMo3O12. High-quality and centimetre-sized single crystals of β-Li2TeMo3O12 were extracted via a facile flux approach. Moreover, optical characterization showed that it has a large bandgap of 3.05 eV accompanied by high transparency from 0.34 to 5.4 μm, encompassing a 3–5 μm atmospheric window. Remarkably, the title compound features the intriguing merits of an intrinsically strong Raman shift located at 955 cm−1 and a narrow line width of 12.54 cm−1, which enable it to act as a stimulated Raman laser, making it a promising mid-infrared Raman crystal. Additionally, theoretical investigations are used to evaluate the fundamental relationships between the compound's structure and optical properties.
研究领域:
材料科学
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光学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2024
·
IF 5.8
Siyuan Cheng,Shun Zou,Zhengjuan Wang,Liang Ling,Xia Zeng,Pingsun Qiu,Dazhi Sun,Xiyun He
A series of GdIG ceramics with good infrared transparency have been fabricated by a hot-press sintering process with vacuum/oxygen atmosphere. The effects of the powder synthesizing temperature and the ceramic sintering temperature on the phase structure and microstructure of the GdIG ceramics were examined and analyzed. The GdIG ceramic sample sintered at 1275 °C from the Gd 2 O 3 and Fe 2 O 3 powders pre-synthesized at 1000 °C demonstrated an exceptionally high infrared transmittance, it is ≥ 68% within the wavelength range of 1500–5000 nm (t = 0.5 mm). Furthermore, the magnetic and magneto-optic property of the GdIG ceramic samples were investigated and discussed. When a saturation external magnetic field of ∼50 mT acting on the GdIG ceramic sample, the specific Faraday rotation angles are about 104 deg./cm and 51 deg./cm at 1064 and 1550 nm wavelength respectively. It exhibits a good faraday effect of GdIG ceramics which is rarely reported until now.
研究领域:
材料科学
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光学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Xincheng Cai,Junjing Duan,Zhangyi Huang,Zhenyu Zhang,Shengquan Yu,Xiaoqiang Li,Jianqi Qi,Tiecheng Lu
Y 2 O 3 -MgO composites are promising for mid-infrared windows and domes in harsh environments. However, the insufficient transmittance range (the transmittance >30 % only in ∼2–7 μm) and strong absorption peak (the transmittance <32 % at 7.0 μm) of Y 2 O 3 -MgO composites severely limit their application range because of agglomerations and carbon contamination from organics in the raw materials, currently. In this study, utilizing carbon-free raw materials and high molecular motions, the reduction of carbon contamination and agglomerations within the as-synthesized nanopowers was achieved via the modified co-precipitation synthesis. A highly mid-infrared transparent (the maximum transmittance of 79 % at 6.0 μm) Y 2 O 3 -MgO composite with wide transmittance range (the transmittance >30 % in 2.2–9.7 μm) and weak absorption peaks (the transmittance ≈68.57 % at 7.0 μm) was fabricated by the hot-pressing sintering method using the as-obtained nanopowders in the absence of exogenous dopants. And the modified co-precipitation synthesis is a method with great potential for the development of mid-infrared transparent Y 2 O 3 -MgO composites with wide transmittance range and weak absorption peaks.
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
危险品化学品经营许可证（带存储）