OPTICAL MATERIALS
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2024
·
IF 3.8
Xiaoman Li,Xinyu Liu,Pengfei Zhai,Ruijin Fan,Rongfei Wei,Hai Guo
The demand for white-light luminescent materials for the white-light-emitting diodes (W-LEDs) field has been growing in modern life. In this work, a series of Sn 2+ and Mn 2+ ions co-doped highly transparent white-light emitting oxyfluoride glasses (precursor glass, PG) and Sr 2 LuF 7 glass-ceramics (GC) were successfully prepared by the melt-quenching technique. Their luminescent and structural properties were investigated by the transmission spectra, excitation and emission spectra at different temperatures (300-500 K), luminescent decay curves, XRD, and TEM characterizations. Upon excitation with ultraviolet (UV) light, tunable broadband blue-white light emissions of Sn 2+ were obtained by adjusting the concentration of Sn 2+ ions. A conspicuous energy transfer process from Sn 2+ to Mn 2+ was observed in Sn 2+ /Mn 2+ co-doped samples. Tunable broadband luminescence between blue-white light and orange-red light regions and nearly pink-white light emission was realized by varying Mn 2+ concentration. Furthermore, compared to PG samples, the emissions were enhanced in GC samples due to the crystallization of Sr 2 LuF 7 nanocrystals. Excellent thermal stability was also performed in these Sn 2+ doped PG and GC samples with a recovering value of 96 % and 98.8 %, respectively. Simultaneously, Sn 2+ doped PG and GC samples also own good optical thermal sensitivities with an S A value of 2.28 % and 2.47 % K - 1 , respectively. Our results indicate that these Sn 2+ /Mn 2+ co-doped PG and GC may serve as tunable light sources under UV excitation and have prospects on the ratiometric optical thermometry fields.
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
·
2020
·Vol. 103
·期 8
·4203-4213
·
IF 3.502
Guoquan Qian,Guowu Tang,Qi Qian,Yongbao Xiao,Dongdan Chen,Zhonghong Jiang,Zhongmin Yang
Germanate laser glasses have received much attention as a promising host materials for mid-infrared fiber lasers in recent years because of the outstanding infrared transparency, low phonon energy, and high rare earth solubility of such glasses. However, the development of high-performance germanate laser glasses is usually based on intuition and a trial-and-error method, which can involve long experimental periods and high costs, and thus, this approach is highly inefficient. Recently, with proposals for materials genome engineering, the concept of the “glass genome” has grown of interest to us. Herein, the structures of Tm 3+ -doped germanate laser glasses (BaO–GeO 2 and BaO–La 2 O 3 –GeO 2 ) were investigated by Fourier transform infrared spectra (FTIR) and Raman spectra analyses, which revealed that the resulting glass contains similar structural groups to the neighboring congruently melted glassy compounds (NCMGCs) in the composition diagram. What is more, the structure and properties of the resulting laser glasses largely depend on NCMGCs. Then, the glass-forming region, physical properties, and luminescence properties were calculated via the use of NCMGCs in Tm 3+ -doped BaO–GeO 2 binary and BaO–La 2 O 3 –GeO 2 ternary laser glass systems. The calculated results were in good agreement with the experimental results, thus demonstrating that our approach is practical for predicting the glass-forming region, physical properties, and luminescence properties in Tm 3+ -doped BaO–GeO 2 binary and BaO–La 2 O 3 –GeO 2 ternary laser glass systems. This work may provide an effective method to develop Tm 3+ -doped germanate laser glasses rapidly and at low cost.
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
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Ziwei Chen,Weiyi Ji,Xiangping Xian,S. Thomas Ng,Chi Sun Poon
Vitrification technology is an effective solution for rapid stabilization and resource utilization of heavy metal-containing hazardous waste. Waste soda-lime-silica (SLS) glass is an abundantly available vitrification flux and can contribute to the sustainable waste-treating-waste strategy. Understanding the interactions between the SLS glass network and heavy metals is vital for optimizing the vitrified composition systems. This study adopted molecular dynamics simulations and various experimental techniques to comprehensively elucidate the immobilization mechanism of the representative heavy metal ion of Pb 2+ in SLS glass. Our results indicated Pb ions were incorporated into the glass matrix primarily as three forms, namely, [PbO 3 ] triangles, [PbO 4 ] tetrahedra, and highly coordinated [PbO n ] ( n > 4) polyhedra. With the increasing amount of Pb ions immobilized, the dominant role of Pb ions transformed from the network modifiers of highly coordinated [PbO n ] units to the network formers of [PbO 3 ] and [PbO 4 ] units. As a result, the degree of network polymerization first decreased and then increased with the turning point of 7.5 wt% PbO content. Different from regular [SiO 4 ] tetrahedra, the [PbO 3 ] and [PbO 4 ] units were less stable and prone to deformation, resulting in the small inter-polyhedral bond angle Pb-O-Si. The structural transformations significantly affected the macroscopic thermal and chemical stability of the vitrification products. Generally, the vitrification products with a PbO content of below 11 wt% were allowed to be recycled in construction materials according to the Chinese standard. This study has a high value for tuning vitrification chemistry and developing green Pb-containing vitrification materials.
研究领域:
材料科学
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环境工程
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固态化学
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废物处理
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分子模拟
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2021
·Vol. 13
·期 4
·505
·
IF 4.329
Jintao Sun,Fei Cai,Dongzhi Tao,Qingqing Ni,Yaqin Fu
Glass fiber fabrics/hollow glass microspheres (HGM)–waterborne polyurethane (WPU) textile composites were prepared using glass fiber, WPU, and HGM as skeleton material, binder, and insulation filler, respectively, to study the effect of HGM on the thermal insulation performance of glass fiber fabrics. Scanning electron microscopy, Instron 3367 tensile test instrument, thermal constant analysis, and infrared thermal imaging were used to determine the cross-sectional morphology, mechanical property, thermal conductivity, and thermal insulation property, respectively, of the developed materials. The results show that the addition of HGM mixed in WPU significantly enhanced thermal insulation performance of the textile composite with the reduction of thermal conductivity of 45.2% when the volume ratio of HGM to WPU is 0.8 compared with that of material without HGM. The composite can achieve the thermal insulation effect with a temperature difference of 17.74 °C at the temperature field of 70 °C. Meanwhile, the tensile strength of the composite is improved from 14.16 to 22.14 MPa. With these results, it is confirmed that designing hollow glass microspheres (HGM) is an effective way to develop and enhance the high performance of insulation materials with an obvious lightweight of the bulk density reaching about 50%.Keywords:hollow glass microsphere (HGM);thermal insulation;glass fiber fabric;composites
研究领域:
材料科学
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热物理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2021
·
IF 8.067
Guang Yang,Yunhang Qi,Daming Hu,Haochen Wang,Hongfei Chen,Liangmiao Zhang,Chuanxiang Cao,Bin Liu,Fang Xia,Yanfeng Gao
Tungsten bronze coatings and films have attracted global attention for their applications in near-infrared (NIR)-shielding windows. However, they are unstable in strong ultraviolet, humid heat, alkaline and/or oxidizing environments and are difficult to be coated on glass surfaces with complex shape. Here, we address these limitations by doping sodium tungsten bronze (Na x WO 3 ) into bulk glasses using a simple glass melting method. X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, TEM and SEM-EDS characterization confirmed the presence of sodium tungsten bronze (Na x WO 3 ) functional units inside the 34SiO 2 -38B 2 O 3 -28NaF glass matrix. Because the functional units are well protected by the glass matrix, the fabricated glasses are stable under hot, humid, oxidizing conditions, as well as under ambient conditions, with no change after 360 days. The NIR-shielding performance of these glasses can be adjusted to as high as 100 % by varying WO x concentration (2−8 mol%) and quenching temperature (1000−1400 °C). With a content of 6 mol% WO x and a quenching temperature of 1000 °C, the bulk glass shows 63 % transmission of visible light and only 11 % transmission of NIR light at 1100 nm. Thermal insulation experiments show that the NIR-shielding performance of the glasses are far superior to commercial soda lime window glass or indium-doped tin oxide (ITO) glass, and comparable to cesium tungsten bronze coated glass. The novel bulk glasses have higher stability, simpler processing, and can be easily made into complex shapes, making them excellent alternative materials for energy-saving glasses.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Dewei Ma,Panli Zhu,Jun Huang,Xiuhua Cao
The research on low-temperature lead-free glass is of great significance for the miniaturization, integration and intelligence of current electronic products, as well as environmental protection. In this article, we report the preparation of low-temperature lead-free B 2 O 3 -BaO-ZnO-SiO 2 -Al 2 O 3 -TeO 2 glasses by a melt-quenching technique. With the increase of TeO 2 content in glass, the glass transition temperature and melting temperature of sintered glass powder decrease, while its wettability and acid corrosion resistance show an increasing trend. The application of glass powder in the sintering experiment of terminal electrode slurry further proves this viewpoint. Compared with the poor sintering performance of the slurry with TeO 2 -free glass powder, the slurry containing TeO 2 glass powder forms a very dense sintered solid, and the sintered slurry is tightly bonded to the ceramic substrate .
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2022
·Vol. 105
·期 8
·5167-5177
·
IF 4.186
Ruili Zhang,Delong Ma,Jianrong Wang,Yang Chen,Xun Hu
A detailed structural investigation of a series of phosphate laser glasses with composition x Bi 2 O 3 – y Al 2 O 3 –(100 − x – y )NaPO 3 ( x = 0, 10; y = 0, 5, 10, 15, 20) has been conducted using solid-state nuclear magnetic resonance (NMR) techniques and X-ray photoelectron spectroscopy (XPS). 31 P MAS NMR spectroscopy demonstrates that the addition of Bi 2 O 3 and Al 2 O 3 leads to the depolymerization of the phosphorus chain in the process of Q 2 → Q 1 → Q 0 . The various phosphorus species (Q n , n = 0, 1, 2) are identified by 31 P single pulse, 31 P{ 27 Al} rotational echo adiabatic passage double resonance, 31 P{ 27 Al} J-coupling-based heteronuclear multiple-quantum coherence, and 1D refocused INADEQUATE experiments. The results of 23 Na{ 31 P}, 31 P{ 23 Na}, 27 Al{ 31 P} rotational echo double resonance, and XPS consistently confirm that Na + , Al 3+ , and Bi 3+ ions are all bound by phosphorus tetrahedron [PO 4 ] 3− . No bond is formed between these glass modifiers. Based on the complementary evidence from previous experiments, comprehensive local structure models are developed for these Bi 2 O 3 –Al 2 O 3 –NaPO 3 glasses.
研究领域:
材料科学
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固体物理学
✓ 已验证
DOI
高影响因子
INFRARED PHYSICS & TECHNOLOGY
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2024
·
IF 3.1
Yin Liu,Jie Wan,Yongbao Xiao,Dechao Yu
Glass forming regions of Al 2 O 3 -CaO-SrO (AlCaSr) system were systematically studied and clearly depicted by a combination of thermodynamic calculation method and traditional melt-quenching experiments. The glass forming region was first found with a composition range of Al 2 O 3 : 12–32 mol%, CaO: 43–68 mol%, and SrO: 20–36 mol%. Moreover, two representative glass compositions, 26.6Al 2 O 3 -49.4CaO-24SrO (AlCaSr-1) and 17.48Al 2 O 3 -58.52CaO-24SrO (AlCaSr-2), in central part of the experimental glass forming region and the corresponding glass doped with 1 mol% Er 2 O 3 , i.e., AlCaSr-1-Er and AlCaSr-2-Er, were selected and carefully prepared in our lab. Detailed investigations proved that the AlCaSr glasses had excellent comprehensive properties with high T g temperature (∼ 800 °C), wide transparency wavelength range (0.3–6 μm), and low maximum phonon energy (∼ 770 cm −1 ), and good 2.7 μm mid-infrared emitting properties via doping Er 3+ activators. These results highlight the potential application of AlCaSr glasses as infrared materials, and could benefit the development of high-performance infrared glasses.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Fangyi Huang,Jiaqing Du,Xiaoli Tang,Qin Zhang,Xingyu Huo,Yuanxun Li,Xian Jian,Hua Su
Ba 0.8 Sr 0.2 CuSi 2 O 6 ceramics have a low dielectric constant, which is useful for low-latency 5G communication. To enable the preparation of Ba 0.8 Sr 0.2 CuSi 2 O 6 low-temperature co-fired ceramic (LTCC) materials, LBSCA and LBBS were used in this paper to reduce the sintering temperature of Ba 0.8 Sr 0.2 CuSi 2 O 6 . The effects of LBSCA and LBBS on the phase composition, densification, microscopic morphology, and vibrational characteristics of the ceramics were investigated by X-ray diffraction, scanning electron microscopy, density measurements, and Raman spectroscopy , and the causal factors influencing the microwave dielectric properties with the addition of glass were analyzed. It was found that 0.4 wt% LBSCA glass and 1 wt% LBBS glass reduced the sintering temperature to 925 °C, and these prepared ceramics had excellent microwave dielectric properties. The ceramic prepared with 0.4 wt% LBSCA glass had an ε r value of 7.672, Q × f value of 37193 GHz, and τ f value of −14.93 ppm/°C, while the ceramic prepared with 1 wt% LBBS glass had an ε r value of 7.512, Q × f value of 32136 GHz, and τ f value of −13.92 ppm/°C. The phase composition of the ceramics did not significantly change, indicating that neither glass reacted with the ceramics. The ε r value was affected by both density and Raman shift, the trend in the Q × f values was consistent with the density, and the τ f value decreased with increasing glass content, which was attributed to the liquid phase generated by the glass in the ceramic. In addition, co-firing these glass-doped ceramics with Ag at a low temperature resulted in good chemical compatibility. Combined with the near-zero τ f , these results demonstrate the excellent promise of these two ceramics as alternative materials for LTCC microwave devices and their application in 5G communication.
研究领域:
材料科学
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电子工程
✓ 已验证
产品关联
DOI
高影响因子
Advanced Science
·
2024
·Vol. 12
·期 6
·2411861
·
IF 14.3
Xu Feng,Guanfeng Gao,Quanhua Lin,Yongkang Yang,Jiajia Tan,Ziang Liu,Jianrong Qiu,Xiaofang Jiang,Shifeng Zhou
The entropy mediated temperature-structure evolution has attracted significant interest, which is used for the development of functional alloys and ceramics. But such strategy has not yet been demonstrated for development of non-metallic glasses. Herein, the successful application of the entropy engineering concept to non-metallic glass to manipulate its in situ crystallization process is demonstrated. The comparison of the entropy concept in alloys, ceramics, and non-metallic glass is discussed. As a typical example, the activation and preservation of the entropy stabilized effect of a typical niobosilicate glass system at different temperatures are studied. The relation between the micro-configurations and the entropic property is analyzed. Via the entropy engineering strategy, the crystallization of the niobosilicate glass can be manipulated. As a result, the LiNbO 3 nanocrystal-in-glass (NiG) composite with high crystallinity is developed, which exhibits 8 times higher nonlinearity compared with the β -BBO crystal. The developed NiG composite is demonstrated for practical application in precise measurement of the duration and phase of ultra-short femtosecond pulse.
研究领域:
材料科学
·
凝聚态物理
✓ 已验证
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2022
·
IF 7.693
Hongwei Li,Rui Wang,Wei Zhao,Hongwei Guo,Bingji Yan,Peng Li
Lightweight glass-ceramic foams as novel building and decoration materials exhibit great advantages. Herein, fluorite tailings and waste glass were recycled to sinter glass-ceramic foams by introducing calcined kaolin and calcium phosphate. The effects of calcium phosphate addition and sintering temperature on the crystalline phase, microstructure evolution, fluoride leaching performance and physical properties of the glass-ceramic foams were systematically investigated using X-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy, Fourier transform infrared spectra, computed tomography, and differential scanning calorimetry. The obtained glass-ceramic foams sintered at 1110 °C exhibited relatively homogeneous pore sizes and distributions, low densities and thermal conductivities, and high compressive strengths. Moreover, the addition of calcium phosphate promoted the formation of fluorapatite, which benefited the toxic fluorine stabilization in the glass-ceramic foams. Thermodynamic data were calculated using Factsage 8.1 and verified through experiments to establish the physical structure transition during sintering. This study provides an efficient utilization route to convert fluorite tailings and waste glass into stable and valuable lightweight glass-ceramic foams.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN NUCLEAR ENERGY
·
2022
·
IF 2.461
Pan Tan,Xiaoyan Shu,Mingfen Wen,Lingshuang Li,Yuexiang Lu,Xirui Lu,Shuaipeng Chen,Faqin Dong
Various cerium doped aluminosilicate glass was prepared by a high-temperature melting method using natural granite material as the only origin of the glass substrate . TG-DSC was used to understand the changes of this aluminosilicate material in the melting process. The structure of the glass was systematically studied by X-ray diffraction, scanning electron microscopy, infrared spectroscopy, X-ray photoelectron spectra. This type of aluminosilicate material begins to vitrify at about 1000 °C, and its maximum vitrification degree was obtained at 1500 °C. The structure of the glassy waste forms prepared at this temperature is mainly composed of Q 3 and Q 4 structural units. With the addition of cerium ions, the proportion can even reach 82%. Such good glass integrity makes this type of aluminosilicate glass density and hardness up to 2.89 g cm −3 and 7.80 GPa, respectively. However, the addition of excessive cerium ions destroys the integrity of the network, resulting in that the glass can only carry 17 wt % cerium ions at most. At this point, 55.93% of Ce 4+ ions are reduced to Ce 3+ . In the meantime, cerium ions are evenly distributed in the glass network. This study provides a strategy for the treatment of radioactive waste with similar properties with cerium ions.
研究领域:
材料科学
·
环境科学
✓ 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）