MATERIALS & DESIGN
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2025
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IF 7.9
Yuannong Qu,Ji Zou,Weimin Wang,Wei Ji,Zhengyi Fu
The h-BN/ZrO 2 composites for preparing ceramic side sealing plate were obtained with spark plasma sintering (SPS) at 1700 °C for 10 min in the study. By varying AlN content from 0 to 20 wt%, we systematically explored its influence on sintering behavior, microstructure evolution, mechanical performance, and corrosion mechanism at1600 °C. Results show that the rapid heating and uniaxial pressure during SPS and the in-situ reactions between AlN and ZrO 2 promoted the densification of composites. The main reaction products were ZrN, which acted as an effective oxygen scavenger, consuming dissolved oxygen ([O]) and converting into ZrO 2 . These newly formed ZrO 2 particles filled residual porosity within the matrix and nucleated around pre-existing ZrO 2 grains, progressively coalescing into continuous Zr-rich barrier layer.Thereby preventing molten steel from further penetrating into the matrix. The corrosion depth of the composite with 5 wt% AlN content in molten steel at 1600 °C after 2 h was only 69 μm. Meanwhile, it showed a thermal conductivity of 25 W m −1 K −1 and a coefficient of thermal expansion of 3.7 × 10 -6 K −1 , demonstrating excellent thermal shock resistance. The composites are expected to be used to manufacture side sealing plates for the novel continuous casting of thin strip.
研究领域:
材料科学
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陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Tongtong Zhu,Xu Liang,Yanrong Liang,Yusai Xu,Haitao Wang,Lingling Dong,Jiaying Zheng,Youqing Dong,Weidong Xiang,Xiaojuan Liang
The low thermal regulation and reflectivity of reflective converters limit their use in high brightness and power applications. The well-known "efficiency degradation" effect causes significant heat accumulation, leading to thermal quenching. This highlights the urgent need for the development of phosphor conversion materials with enhanced heat dissipation and reflectivity. In this study, zinc oxide (ZnO), with excellent thermal conductivity and reflectivity, was incorporated into titanium dioxide (TiO 2 ) and co-printed onto an aluminum nitride (AlN) substrate. The LuAG: Ce-PiF-TiO 2 -ZnO-AlN (LuAG: Ce PT-ZAF) reflective green converter with outstanding optothermal performance was designed. The experimental results show that the reflectivity of the doped ZnO reflective layer can reach 90.95 %, while the thermal conductivity and thermal diffusivity of LuAG: Ce PT-ZAF containing 7 % ZnO are 50.23 W·m −1 ·K −1 and 19.84 mm 2 /s, respectively. The optimized LuAG: Ce PT-ZAF glass film can withstand a maximum laser power density of up to 22.96 W/mm 2 , with a maximum luminous flux (LF max ) of 3091.40 lm and a luminous efficiency (LE max ) of 206.15 lm/W, which is 1934.40 lm and 19.21 lm/W higher than that of undoped glass films. At 498.15 K, the emission intensity of LuAG: Ce PT-ZAF reaches 91.19 %. This indicates that LuAG: Ce PT-ZAF is a promising green laser phosphor conversion material with high stability, high reflectivity, and high thermal conductivity.
研究领域:
材料科学
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光学工程
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热管理
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固态照明
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光电子学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Bio
·
2024
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IF 8.7
Lei Huang,Peihao Cai,Mengxuan Bian,Jieqin Yu,Lan Xiao,Shunyi Lu,Jiayi Wang,Weisin Chen,Guanjie Han,Xingdong Xiang,Xin Liu,Libo Jiang,Yulin Li,Jian Zhang
Osteoporosis (OP) can result in slower bone regeneration than the normal condition due to the imbalance between osteogenesis and osteoclastogenesis, making osteoporotic bone defects healing a significant clinical challenge. Calcium phosphate cement (CPC) is a promising bone substitute material due to its good osteoinductive activity, however, the drawbacks such as fragility, slow degradation rate and incapability to control bone loss restrict its application in osteoporotic bone defects treatment. Currently, we developed the PLGA electrospun nanofiber sheets to carry alendronate (ALN) and magnesium oxide nanoparticle (nMgO) into CPC, therefore, to obtain a high-strength bone cement (C/AM-PL/C). The C/AM-PL/C bone cement had high mechanical strength, anti-washout ability, good injection performance and drug sustained release capacity. More importantly, the C/AM-PL/C cement promoted the osteogenic differentiation of bone marrow mesenchymal stem cells and neovascularization via the release of Mg 2+ (from nMgO) and Ca 2+ (during the degradation of CPC), and inhibited osteoclastogenesis via the release of ALN in vitro . Moreover, the injection of C/AM-PL/C cement significantly improved bone healing in an OP model with femur condyle defects in vivo . Altogether, the injectable C/AM-PL/C cement could facilitate osteoporotic bone regeneration, demonstrating its capacity as a promising candidate for treatment of osteoporotic bone defects.
研究领域:
材料科学
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生物材料
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生物医学工程
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骨科
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组织工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2022
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IF 7.305
Ye Wang,Jianfeng Hu,Zeming Zhu,Guohao Du,Xin Lai,Zhengguo Zhang
Phase change materials (PCMs) have the advantages of high heat storage density and wide phase transition temperature, which can effectively solve the intermittent and random problems of solar energy. However, problems such as low light conversion efficiency and easy leakage of PCMs limit their application in the field of solar water heating . In this work, graphene nanoplatelets (GNPs) aerogel is prepared by mixing GNPs with solidum alginate by freeze-drying method. Then, composite PCMs with high latent heat and photothermal conversion efficiency are successfully prepared by impregnation polyethylene glycol (PEG) mixed with aluminum nitride (AlN) into GNPs aerogel . GNPs aerogel exhibits lighter mass and obvious pore structure , and the adsorption rate of PEG can be as high as 87%. The prepared composite PCM with 1% AlN (mass fraction) exhibits 176.6 J/g and the photothermal conversion efficiency is 80.3%. Moreover, the encapsulated PEG maintains good shape stability and only loses 0.4% in heat storage capacity after 100 cycles. These properties make it present great potential in the practical application of solar water heaters .
研究领域:
材料科学
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能源工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF DRUG TARGETING
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2023
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IF 4.5
Fengbo Yu,Hongyuan Wang,Qiang Wang,Fengguo Zhai,Jinghua Wang,Chunming Huang,Liao Cui
Tanshinol (Tan) has good therapeutic effects on osteoporosis, fracture, and bone trauma repair. However, it is easily oxidised, has low bioavailability and a short half-life. To solve these problems, the study aimed to develop a novel bone-targeted nano-sustained-release drug delivery system PSI-HAPs for the systemic administration of Tan. This proposed system has hydroxyapatite (HAP) as the core to load drug and polysuccinimide (PSI), PEG-PSI (Polyethylene glycol, PEG), and ALN-PEG-PSI (Alendronate sodium, ALN) as the coating materials to form nanoparticles. The article examines the various PSI-HAPs’ entrapping efficiency (EE, %), drug loading capacity (DLC, %), and distribution to determine the best PSI-HAP formulation in vivo. The in vivo experiment showed that the ALN-PEG-PSI-HAP (ALN-PEG/PSI molar ratio = 1:20) was the best preparation due to its higher distribution on bone (120 h) and lower distribution in the other tissues. The determined preparation was a uniformly spherical or sphere-like nanoparticle with a negative zeta potential. Additionally, it exhibited pH-sensitive drug release in PBS based on an in vitro drug release test. The proposed PSI-HAP preparations were prepared in the water solution using a facile preparation process without ultrasound, heating, and other conditions, which can significantly affect the stability of drugs.
研究领域:
药学
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纳米技术
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药物递送系统
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骨骼健康
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2023
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IF 5.7
Lifu Lin,Haidong Wu,Yehua Li,Junye Wang,Shanghua Wu
In this work, the influence of AlN particle size (250 nm, 1.2 µm, and 5 µm) on the curing behavior, stability and viscosity of ceramic suspensions was evaluated. It was revealed that an increase in the particle size of AlN powders reduced the stability and viscosity of the suspension. For curing behavior, the ceramic suspension prepared with 250 nm AlN powder exhibited the smallest curing depth and excess width, whereas the 5-μm ceramic suspension had the largest curing depth. The analysis of the scattering length revealed that a decrease in AlN powder particle size reduced the scattering length. After sintering, both the 250-nm and 1.2-μm samples could be sintered densely at temperatures more than 1800 °C with the relative density greater than 99%. Finally, following a 5 h sintering at 1850 °C, the 250-nm and 1.2-μm samples obtained thermal conductivities of 171 and 174 W/mK, respectively.
研究领域:
材料科学
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陶瓷
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增材制造
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）