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Development of covalent-organic frameworks derived hierarchical porous hollow carbon spheres based LiOH composites for thermochemical heat storage
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作者 Xiangyu Yang Shijie Li +2 位作者 Jianguo Zhao Hongyu Huang Lisheng Deng 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2022年第10期301-310,I0007,共11页
Under the joint assistance of its excellent storage strength, accessible long storage lifespan, and high heat utilization efficiency, salt hydrate-based thermochemical heat storage(THS) materials give renewable energy... Under the joint assistance of its excellent storage strength, accessible long storage lifespan, and high heat utilization efficiency, salt hydrate-based thermochemical heat storage(THS) materials give renewable energy an important outlet to alleviate the pressure of underutilization. Herein, an activated hollow spherical carbon(AHSC) with hierarchical porous architectures converted from covalent-organic frameworks(COFs) is constructed and utilized as the supporting matrix for Li OH.THS composite material for the first time. The obtained Li/AHSC_(3) composites have distinguished hydration performance while manifesting impressive storage ability up to 1916.4 k J kg^(-1)with low operating temperature stemming from the collective effect of the void spherical framework, multimodal porosity, and high surface area of AHSC3. And the Li/AHSC3-40 composite with evidently progressed thermal conductivity is capable of realizing 94.5% heat preservation after twenty-five adsorption-desorption cycles, exhibiting its eminent cyclability and great heat transfer performance. This study not only brings new hope for overcoming the underutilization of low-grade heat but also may enlighten new ideas for enriching the application scenarios of COFs-derived carbonaceous materials. 展开更多
关键词 Activated hollow spherical carbon Hierarchical porous architectures LiOH·THS composite material Storage ability COFs-derived carbonaceous materials
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Preparation,Structure and Mechanical Properties of Nickel Based Porous Spherical Superalloy
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作者 MI Guo fa LI Hong-yu +1 位作者 LIU Xiang-yu WANG Kuang-fei 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2009年第1期92-96,共5页
The porous superalloy materials with hollow spherical pores were fabricated by using metal powder sintering process. The scanning electron microscope (SEM) observation was applied to the test samples and it revealed... The porous superalloy materials with hollow spherical pores were fabricated by using metal powder sintering process. The scanning electron microscope (SEM) observation was applied to the test samples and it revealed that the pores of the porous material exhibited a uniform distribution and the apertures were of same size in principle. The sintering necks appeared between adjacent particles on metal skeleton after sintering. The mechanical properties of the test samples were analyzed and the result showed that this kind of materials possessed excellent energy absorption capability, and the compression resistance decreased with increasing the porosity and aperture. 展开更多
关键词 porous superalloy material metal powder sintering hollow spherical pore oriented linear pore
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Facile synthesis of La_2Mo_2O_9 nanoparticles via an EDTA complexing approach 被引量:1
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作者 CHENG Hua WANG Hongen +2 位作者 LI Liang LU Zhouguang QIAN Dong 《Rare Metals》 SCIE EI CAS CSCD 2008年第4期340-344,共5页
A facile EDTA (ethylene diamine tetraacetic acid) complexing technique has been successfully employed to prepare La2Mo2O9 nanoparticles. The as-synthesized products are characterized by X-ray diffraction (XRD), sc... A facile EDTA (ethylene diamine tetraacetic acid) complexing technique has been successfully employed to prepare La2Mo2O9 nanoparticles. The as-synthesized products are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and Fourier transform infrared spectroscopy (FT-IR). The results show that a homogeneous transparent gel can be obtained with EDTA as the organic complexing reagent under the pH value of 3.0. Further thermal decomposition of the as-synthesized transparent gel by increasing the temperature up to 600℃ for 3 h results in the formation of La2Mo2O9 nanoparticles with a crystal size of about 30 nm. Moreover, the nanoparticles tend to form micrometer-sized aggregates with a three-dimensional network structure, which shows promising applications in solid oxide fuel cells (SOFC), catalysts and so on. 展开更多
关键词 inorganic non-metal materials EDTA complexing SOL-GEL La2Mo2O9 NANOPARTICLES porous structure
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Vital role of hydroxyapatite particle shape in regulating the porosity and mechanical properties of the sintered scaffolds 被引量:2
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作者 Jinchuan Wu Changshun Ruan +2 位作者 Yufei Ma Yuanliang Wang Yanfeng Luo 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2018年第3期503-507,共5页
The effect of particle shape on the porosity and compressive strength of porous hydroxyapatite (HA) scaffolds was investigated by sintering the mixture of rod-shaped HA (r-HA) and spherical HA (s-HA) with polyac... The effect of particle shape on the porosity and compressive strength of porous hydroxyapatite (HA) scaffolds was investigated by sintering the mixture of rod-shaped HA (r-HA) and spherical HA (s-HA) with polyacrylamide used as the sacrificial template. It was found, for the first time, that addition of r-HA into s-HA could exponentially decrease the porosity of sintered HA scaffolds and enhance their compressive strength with the increase of r-HA content. The mechanism, according to the results from scanning electron microscopy and X-ray diffraction, lies in the restriction of s-HA to the grain formation and growth of r-HA during sintering and results in the fusion of r-HA with s-HA. These findings suggest that mixture of r-HA and s-HA might provide a new and facile way to improve the compressive strength of oorous HA scaffolds. 展开更多
关键词 spherical/rod-shaped hydroxyapatite Bioceramics porous materials Sintering Compressive strength
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