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Preparation of steel slag porous sound-absorbing material using coal powder as pore former 被引量:4
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作者 Peng Sun Zhancheng Guo 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2015年第10期67-75,共9页
The aim of the study was to prepare a porous sound-absorbing material using steel slag and fly ash as the main raw material, with coal powder and sodium silicate used as a pore former and binder respectively. The infl... The aim of the study was to prepare a porous sound-absorbing material using steel slag and fly ash as the main raw material, with coal powder and sodium silicate used as a pore former and binder respectively. The influence of the experimental conditions such as the ratio of fly ash, sintering temperature, sintering time, and porosity regulation on the performance of the porous sound-absorbing material was investigated. The results showed that the specimens prepared by this method had high sound absorption performance and good mechanical properties, and the noise reduction coefficient and compressive strength could reach 0.50 and 6.5 MPa, respectively. The compressive strength increased when the dosage of fly ash and sintering temperature were raised. The noise reduction coefficient decreased with increasing ratio of fly ash and reducing pore former, and first increased and then decreased with the increase of sintering temperature and time. The optimum preparation conditions for the porous sound-absorbing material were a proportion of fly ash of 50%(wt.%), percentage of coal powder of 30%(wt.%), sintering temperature of 1130°C,and sintering time of 6.0 hr, which were determined by analyzing the properties of the sound-absorbing material. 展开更多
关键词 Steel slag porous sound-absorbing material Noise reduction coefficient Apparent porosity Compressive strength
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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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