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Effect of Methyl Methacrylate– Acrylonitrile -Butadiene–Styrene (MABS) on the Mechanical and Thermal Properties of Poly (Methyl Methacrylate) (PMMA)-Fly Ash Cenospheres (FAC) Filled Composites 被引量:1
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作者 M. B. Kulkarni P. A. Mahanwar 《Journal of Minerals and Materials Characterization and Engineering》 2012年第4期365-383,共19页
With the advent of plastics and the wide range of fillers that are available have made modifications as precise as the tailored resins themselves. To modify the properties of polymer either by using fillers or by prep... With the advent of plastics and the wide range of fillers that are available have made modifications as precise as the tailored resins themselves. To modify the properties of polymer either by using fillers or by preparation of polymer blends gives rise to new materials with tailored properties. More complex, three-component systems, obtained by the addition of polymeric modifier to polymer filled composites may be of interest. Use of Fly ash cenospheres is very attractive because it is inexpensive and its use can reduce the environmental pollution to a significant extent. In the present study, Poly (Methyl Methacrylate) (PMMA)-Fly ash cenospheres composites were prepared using extrusion followed by Injection molding. The effect of matrix modification with Methyl methacrylate– acrylonitrile -butadiene–styrene (MABS) on the performance of PMMA- Fly ash cenospheres compositions was also, studied. It was found that with the addition of Fly ash cenospheres particulate as filler in PMMA showed marginal reduction in Tensile Strength, % Elongation and Impact strength and improvement in Flexural Strength, Heat Deflection Temperature and Vicat Softening Point. Compared with PMMA-cenospheres composites, the notched Impact Strength of the PMMA/MABS/cenospheres composites showed marginal enhancement in values at higher loading of cenospheres. The optimum performances in mechanical and thermal properties were obtained when the ratio of MABS to cenospheres was 1:2. 展开更多
关键词 Poly (Methyl Methacrylate) (PMMA) fly ash cenospheres (fac) Methyl methacrylate– ACRYLONITRILE -butadiene–styrene (MABS) Mechanical and Thermal Properties.
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Structure and Properties of BaFe_(12)O_(19) Coated Fly Ash Cenospheres by Sol-Gel Process 被引量:4
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作者 曾爱香 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2006年第3期129-131,共3页
Thin films of barium hexaferrite were prepared on fly ash cenosphere particles by the sol-gel method using Fe( NO3 )3 ·9H2O, Ba( NO3 )2 and citric acid as raw materials. The prepared films were characterized ... Thin films of barium hexaferrite were prepared on fly ash cenosphere particles by the sol-gel method using Fe( NO3 )3 ·9H2O, Ba( NO3 )2 and citric acid as raw materials. The prepared films were characterized by differential thermal and thermogravimetric analysis (DTA-TG), X-ray diffraction analysis (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS), and vibrating sample magnetometry . The magnetic and structural properties of barium hexaferrite coated cenosphere particles were also studied. The experimental results show that even and continual barium hexaferrite coatings were prepared on fly ash cenospheres , and the magnetic conductivity was imparted to these non-conducting oxide ceramic particles. The low density barium hexaferrite coated cenosphere particles may be atilized for manufacturing microwave absorbing materials. 展开更多
关键词 barium hexaferrite COATING fly ash cenosphere particles SOL-GEL
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Hollow Cancrinite Zeolite Spheres in situ Transformed from Fly Ash Cenosphere 被引量:3
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作者 De Ju WANG Yi TANG +2 位作者 An Gang DONG Ya Hong ZHANG Ya Jun WANG 《Chinese Chemical Letters》 SCIE CAS CSCD 2003年第12期1299-1302,共4页
A novel hollow microsphere structure with cancrinite zeolite grown from the shell of fly ash cenosphere has been successfully prepared through in situ transformation in vapor phase; the orientation and morphology of c... A novel hollow microsphere structure with cancrinite zeolite grown from the shell of fly ash cenosphere has been successfully prepared through in situ transformation in vapor phase; the orientation and morphology of cancrinite can be greatly improved by adding tetrapropylammonium hydrate into the synthetic system. 展开更多
关键词 CANCRINITE fly ash cenosphere ZEOLITE hollow microsphere.
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Microstructures and compressive properties of AZ91D/fly-ash cenospheres composites 被引量:2
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作者 黄志求 于思荣 李慕勤 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2010年第B07期458-462,共5页
Novel AZ91D Mg alloy/fly-ash cenospheres(AZ91D/FACs)composites were fabricated by melt stir technique.Fly-ash cenosphere particles with 4%,6%,8%,10%in mass fraction and 100μm in size were used.Hardness and compressiv... Novel AZ91D Mg alloy/fly-ash cenospheres(AZ91D/FACs)composites were fabricated by melt stir technique.Fly-ash cenosphere particles with 4%,6%,8%,10%in mass fraction and 100μm in size were used.Hardness and compressive strength of the composites were measured.The effects of mass fraction of cenospheres on the microstructure and compressive properties were characterized.The results show that the cenospheres are uniformly distributed in the matrix and there is no sign of cenosphere cluster or residual pore.The densities of the composites are 1.85-1.92 g/cm 3 .By comparing with matrix,the compressive yield strength of the composites is improved,and the cenospheres is filled with Mg matrix alloy.SEM,XRD and EDX results of the composites show clear evidence of reaction product at cenosphere/matrix interface.On the basis of XRD and EDX,composition, structure and thermodynamic analysis,the main interfacial phase between the cenosphere and AZ91D Mg alloy was identified to be MgAl2O4. 展开更多
关键词 fly ash cenosphere microstructure compressive properties interface
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Compression behavior and constitutive model establishment of fly ash cenosphere/polyurethane aluminum alloy syntactic foam 被引量:2
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作者 XU Peng WANG Yonghuan 《Journal of Measurement Science and Instrumentation》 CAS CSCD 2021年第3期369-378,共10页
The aluminum matrix syntactic foam was fabricated by pressure infiltration technique,and the filling material is syntactic foam material with fly ash cenosphere as the main component and polyurethane foam as the binde... The aluminum matrix syntactic foam was fabricated by pressure infiltration technique,and the filling material is syntactic foam material with fly ash cenosphere as the main component and polyurethane foam as the binder.Split Hopkinson pressure bar(SHPB)dynamic compression and quasi-static tests were carried out to examine the compressive response of syntactic foam in this study.Then the dynamic constitutive model was established.Results show that the compressive stress-strain curve of syntactic aluminum foam is similar to that of other metallic foam materials:both kinds of aluminum matrix syntactic foams have strain rate effect,and the syntactic foam has higher compressive strength and energy absorption than the same density aluminum foams.However,due to the different sizes of cenospheres,the dynamic compression results of two kinds of syntactic foams are different,and the energy absorption effect of syntactic foam with small size under dynamic impact is the best.In the range of strain rate and density studied experimentally,the curves of constitutive model fit well with the curves of experimental data. 展开更多
关键词 fly ash cenosphere POLYURETHANE composite foam aluminum strain rate effect mechanical property constitutive model
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Analysis of Mechanical Characteristics of Fly Ash Cenospheres Reinforced Epoxy Composites 被引量:1
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作者 陈平 LI Jianchao ZHANG Lei 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2018年第1期139-145,共7页
Fly ash cenospheres(FACs) as a recycling material of industrial waste has become a competitor for other inorganic particle fillers. Epoxy resin(EP) composites reinforced with different content of FACs as well as d... Fly ash cenospheres(FACs) as a recycling material of industrial waste has become a competitor for other inorganic particle fillers. Epoxy resin(EP) composites reinforced with different content of FACs as well as different size grading ratio were prepared. The surface modification of FACs particles was conducted before incorporating into EP matrix. The impact and flexural strengths and the flexural modulus were investigated, and the fracture surfaces of the testing samples were analyzed using SEM. Results showed that FACs had an obvious effect on the mechanical characteristics of the FACs/EP composites. With increasing weight fraction of FACs, the impact and flexural strengths and the flexural modulus of EP composite samples increased, and reached the highest values when the weight fraction of FACs reached 15 wt%. The mechanical characteristics of the FACs/EP composites however deteriorated with further increasing of FACs content. For the EP composites reinforced with different size grading ratio of FACs, the larger proportion of small FACs particles, the better mechanical properties of the EP composites. The results were analyzed from the aspect of the plastic deformation, new surface formation and fracture absorption energy. The synergistic effect of the size grading ratio of FACs was not obvious, which would be further investigated. 展开更多
关键词 fly ash cenospheres epoxy resin mechanical characteristics surface modification
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A Review on Utilization of Light Weight Fly Ash Cenosphere as Filler in both Polymer and Alloy-Based Composites
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作者 Shashikant Kushnoore Nitin Kamitkar +2 位作者 Vinay Atgur Mallikarjun S Uppin MSatishkumar 《Journal of Mechanical Engineering Research》 2020年第2期17-23,共7页
Fly Ash Cenospheres(FACs)are obtained from the coal power plants in the form of hollow spherical particles by burning the coal.FAC was started to use in early 1980-1985 as lightweight filler material in producing comp... Fly Ash Cenospheres(FACs)are obtained from the coal power plants in the form of hollow spherical particles by burning the coal.FAC was started to use in early 1980-1985 as lightweight filler material in producing composites of cementitious and at present many researchers are focusing on use of FAC as filler in polymer and metals.In this paper,the systematic review on research activities and application of FAC in manufacturing light weight products are done.The influence of FAC on the physical and mechanical properties of incorporated polymer and alloy-based composites were summarized.Prospects of future for its use were also suggested and summarized in this paper. 展开更多
关键词 fly ash cenosphere Polymer and Alloy composites Mechanical and Physical properties
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Ag2O/FACs复合材料的制备及其光催化性能 被引量:4
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作者 张惠灵 陈润泽 +3 位作者 龚洁 蒋炘鑫 胡传智 石磊 《武汉科技大学学报》 CAS 北大核心 2019年第5期343-348,共6页
以经过酸化刻蚀改性的粉煤灰漂珠(FACs)为催化剂载体制备Ag 2O/FACs复合材料。借助SEM、XRD、FTIR、BET等对相关样品的物相结构及微观形貌进行表征,并通过亚甲基蓝(MB)溶液的光降解实验评价了所制复合材料的光催化性能。结果表明,尽管F... 以经过酸化刻蚀改性的粉煤灰漂珠(FACs)为催化剂载体制备Ag 2O/FACs复合材料。借助SEM、XRD、FTIR、BET等对相关样品的物相结构及微观形貌进行表征,并通过亚甲基蓝(MB)溶液的光降解实验评价了所制复合材料的光催化性能。结果表明,尽管FACs改性前后的结构及化学组成差别不大,但酸化刻蚀处理能有效提高FACs的吸附性能;Ag 2O/FACs复合材料在近红外光条件下对亚甲基蓝溶液的降解率可达97.5%,并具有较高的催化稳定性;Ag 2O光生空穴在降解反应中起到重要作用。 展开更多
关键词 AG 2O 粉煤灰漂珠 AG 2O/facs复合材料 亚甲基蓝降解 光催化性能 酸化改性
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Synthesis of CeO_2/fly ash cenospheres composites as novel photocatalysts by modified pyrolysis process 被引量:2
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作者 张进 王冰 +3 位作者 崔皓 李闯 翟建平 李琴 《Journal of Rare Earths》 SCIE EI CAS CSCD 2014年第12期1120-1125,共6页
A novel fly ash cenospheres(FACs)-supported CeO2 composite(CeO2/FACs) was successfully synthesized by the modified pyrolysis process.The prepared composites were characterized by X-ray diffraction(XRD), scanning... A novel fly ash cenospheres(FACs)-supported CeO2 composite(CeO2/FACs) was successfully synthesized by the modified pyrolysis process.The prepared composites were characterized by X-ray diffraction(XRD), scanning electron microscopy(SEM), X-ray photoelectron spectroscopy(XPS), and diffuse reflection spectra(DRS) techniques.XRD results indicated that the CeO2 film coated on cenospheres was a face-centered cubic structure.SEM images confirmed that the CeO2 film was relatively compact.XPS results showed that Ce was present as both Ce4+ and Ce3+ oxidation states in CeO2 film coated on FACs substrate.The bandgap of the composite was narrower compared with the pure CeO2.The as-prepared material exhibited good photocatalytic activity for the decolorization of methylene blue(MB) under visible light irradiation, and the first-order reaction rate constant(k) of 0.0028 min–1 for CeO2/FACs composite was higher than 0.0015 min–1 of pure CeO2.The fact that they floated on water meant that CeO2/FACs composites were easily recovered from water by filtration after the reaction.The recycling test revealed that the composites were quite stable during the MB photocatalytic decolorization.The CeO2/ FACs catalyst was therefore promising for practical use in the degradation of pollutants or water cleanup. 展开更多
关键词 CeO2 fly ash cenospheres(facs) photocatalysis modified pyrolysis process rare earths
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Effects of Semi-solid Isothermal Heat Treatment on Microstructures and Damping Capacities of Fly Ash Cenosphere/AZ91D Composites
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作者 En-Yang Liu Si-Rong Yu +3 位作者 Ming Yuan Fan-Guo Li Yan Zhao Wei Xiong 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2018年第9期953-962,共10页
The fly ash cenosphere/AZ91D composites were successfully prepared and isothermally heat-treated at different tem- peratures for different time. The effects of semi-solid isothermal heat treatment on the microstructur... The fly ash cenosphere/AZ91D composites were successfully prepared and isothermally heat-treated at different tem- peratures for different time. The effects of semi-solid isothermal heat treatment on the microstructures and damping capacities of fly ash cenosphere/AZ91D composites were investigated. With the increase in isothermal temperature or holding time, the small liquid droplets within grains increased in size but decreased in quantity. The average size and shape factor of Mg2Si particles increased with the rise of isothermal temperature. The damping capacities of the composites were improved by isothermal heat treatment. At room temperature, the composites after heat treatment at 520 and 550 ℃ had a higher damping capacity due to interface damping when the strain amplitude was lower than about 8.8 × 10^-5, and the composite after heat treatment at 580 ℃ had a better damping capacity because of the dislocation damping under the condition of high strain amplitude. The damping capacities of the composites increased with the rise of the test temper- ature, and the damping mechanisms varied depending on different test temperatures. The interface damping played an important role when the test temperature was below about 100 ℃, and the dislocation damping and grain boundary damping took effect with the rise of test temperature. 展开更多
关键词 fly ash cenosphere Magnesium matrix composite Semi-solid isothermal heat treatment Microstructuralevolution Damping capacity
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Experimental studies of ash film fractions based on measurement of cenospheres geometry in pulverized coal combustion
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作者 Siqi LIU Yanqing NIU +4 位作者 Liping WEN Yang LIANG Bokang YAN Denghui WANG Shi'en HUI 《Frontiers in Energy》 SCIE CSCD 2021年第1期91-98,共8页
In pulverized coal particle combustion, part of the ash forms the ash film and exerts an inhibitory influence on combustion by impeding the diffusion of oxygen to the encapsulated char core, while part of the ash diff... In pulverized coal particle combustion, part of the ash forms the ash film and exerts an inhibitory influence on combustion by impeding the diffusion of oxygen to the encapsulated char core, while part of the ash diffuses toward the char core. Despite the considerable ash effects on combustion, the fraction of ash film still remains unclear. However, the research of the properties of cenospheres can be an appropriate choice for the fraction determination, being aware that the formation of cenospheres is based on the model of coal particles with the visco-plastic ash film and a solid core. The fraction of ash film X is the ratio of the measuring mass of ash film and the total ash in coal particle. In this paper, the Huangling bituminous coal with different sizes was burnt in a drop-tube furnace at 1273, 1473, and 1673 K with air as oxidizer. A scanning electron microscope (SEM) and cross-section analysis have been used to study the geometry of the collected cenospheres and the effects of combustion parameters on the fraction of ash film. The results show that the ash film fraction increases with increasing temperature and carbon conversion ratio but decreases with larger sizes of coal particles. The high fraction of ash film provides a reasonable explanation for the extinction event at the late burnout stage. The varied values of ash film fractions under different conditions during the dynamic combustion process are necessary for further development of kinetic models. 展开更多
关键词 ash film fraction cenospheres coal combustion fly ash
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粉煤灰漂珠负载Bi_2WO_6复合材料的制备及光催化性能研究(英文) 被引量:13
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作者 张进 崔皓 翟建平 《无机化学学报》 SCIE CAS CSCD 北大核心 2014年第12期2857-2862,共6页
以工业固体废弃物粉煤灰漂珠(fly ash cenospheres,FACs)为载体,采用水热法制备了新颖的漂珠负载Bi2WO6复合材料(Bi2WO6/FACs),通过X射线衍射(XRD),扫描电子显微镜(SEM),X-射线光电子能谱(XPS),和紫外-可见漫反射光谱(DRS)技术对其进行... 以工业固体废弃物粉煤灰漂珠(fly ash cenospheres,FACs)为载体,采用水热法制备了新颖的漂珠负载Bi2WO6复合材料(Bi2WO6/FACs),通过X射线衍射(XRD),扫描电子显微镜(SEM),X-射线光电子能谱(XPS),和紫外-可见漫反射光谱(DRS)技术对其进行了表征。XRD数据显示了正交相Bi2WO6的特征衍射峰。DRS结果证实了引入FACs后Bi2WO6对可见光的吸收增强。在可见光的照射下,以亚甲基蓝溶液的光催化降解评价了Bi2WO6/FACs复合材料的光催化性能。结果表明:Bi2WO6/FACs的光催化性能优于纯Bi2WO6的,其一级反应速率常数(k)为后者的2.4倍。尤其是由于漂珠质轻中空的特性,Bi2WO6/FACS复合光催化剂可长时间漂浮于水面,既能充分吸收光能,又有利于催化剂的回收和重复利用。 展开更多
关键词 复合材料 Bi2WO6 粉煤灰漂珠 可见光
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一种漂浮型粉煤灰漂珠负载Pt-BiVO_4材料的制备及性能 被引量:4
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作者 张进 《化工新型材料》 CAS CSCD 北大核心 2014年第11期73-75,78,共4页
以工业固体废弃物粉煤灰漂珠(FACs)为载体,采用金属有机沉积法联合光还原法制备了新颖的复合材料Pt-BiVO4/FACs。利用XRD、SEM、XPS和DRS等手段对材料进行了表征。结果表明:Pt主要以游离态分散在材料的表面;Pt-BiVO4为单斜相结构;复合... 以工业固体废弃物粉煤灰漂珠(FACs)为载体,采用金属有机沉积法联合光还原法制备了新颖的复合材料Pt-BiVO4/FACs。利用XRD、SEM、XPS和DRS等手段对材料进行了表征。结果表明:Pt主要以游离态分散在材料的表面;Pt-BiVO4为单斜相结构;复合材料在可见光区的吸收增强。在λ>400nm的可见光照射下,研究了所制备的材料光催化降解亚甲基蓝的效能。研究发现:同BiVO4、BiVO4/FACs样品相比,Pt-BiVO4/FACs样品的光催化活性大为提高,其中2wt.%Pt-BiVO4/FACs的复合材料显示了最高的光催化效能,其一级反应速率常数(k1)是BiVO4的6.6倍,是BiVO4/FACs的2.8倍。由于漂珠质轻中空的特性,该材料可漂浮于水面,既能充分吸收光能,又利于催化剂的回收和重复利用。 展开更多
关键词 负载型催化剂 粉煤灰漂珠 BIVO4 PT 光催化
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偶联剂改性粉煤灰漂珠对水中苯酚的吸附研究 被引量:2
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作者 张进 《化工新型材料》 CAS CSCD 北大核心 2014年第8期209-212,共4页
利用含氮硅烷偶联剂γ-氨丙基三乙氧基硅烷改性粉煤灰漂珠,制备了硅烷偶联改性漂珠(KH550-FACs),对改性前后的漂珠样品进行了XRD、SEM和XPS表征,并通过静态吸附实验研究了材料对水中苯酚的吸附性能。结果表明,偶联剂成功负载于漂... 利用含氮硅烷偶联剂γ-氨丙基三乙氧基硅烷改性粉煤灰漂珠,制备了硅烷偶联改性漂珠(KH550-FACs),对改性前后的漂珠样品进行了XRD、SEM和XPS表征,并通过静态吸附实验研究了材料对水中苯酚的吸附性能。结果表明,偶联剂成功负载于漂珠表面;该吸附过程符合Langmuir单层吸附模型,其动力学行为符合准二级动力学方程;溶液pH值会影响苯酚的吸附性能,适宜的pH值为7~9。通过硅烷偶联剂对漂珠的改性,改善了材料的疏水性能,提高了材料对苯酚的去除效果;催化剂重复使用4次后,对苯酚的吸附率仍能达到83%。 展开更多
关键词 漂珠 硅烷偶联 氨基化 苯酚 吸附
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漂珠/AZ91D复合材料界面断裂数值模拟预测
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作者 李凡国 于思荣 +1 位作者 初宏超 韩晓玲 《中国铸造装备与技术》 CAS 2017年第2期1-3,共3页
基于代表性体积元的细观力学有限元方法,建立了三种有限元模型,预测漂珠/AZ91D复合材料界面断裂的倾向,对漂珠/AZ91D复合材料进行压缩断裂实验,与模拟结果相比较。结果表明,复合材料断裂裂纹可能最先出现在漂珠壁上;多颗粒均匀随机分布... 基于代表性体积元的细观力学有限元方法,建立了三种有限元模型,预测漂珠/AZ91D复合材料界面断裂的倾向,对漂珠/AZ91D复合材料进行压缩断裂实验,与模拟结果相比较。结果表明,复合材料断裂裂纹可能最先出现在漂珠壁上;多颗粒均匀随机分布的模型更能够从复合材料整体上判断出断裂损伤的趋势;三维模拟结果和实验结果更加接近。 展开更多
关键词 镁基复合材料 漂珠 代表性体积元 数值模拟
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漂珠/AZ91D镁合金复合材料的显微组织与力学性能 被引量:4
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作者 李景达 于思荣 +4 位作者 刘恩洋 赵严 张善保 唐梦龙 袁明 《机械工程材料》 CAS CSCD 北大核心 2016年第3期19-22,26,共5页
以AZ91D镁合金为基体,以不同粒径(45128μm)的漂珠为颗粒增强相,采用搅拌铸造法制备了漂珠质量分数为010%的AZ91D镁合金基复合材料,并研究了复合材料的显微组织和力学性能。结果表明:复合材料中的漂珠分布均匀,主要由α-Mg、Mg17Al12、M... 以AZ91D镁合金为基体,以不同粒径(45128μm)的漂珠为颗粒增强相,采用搅拌铸造法制备了漂珠质量分数为010%的AZ91D镁合金基复合材料,并研究了复合材料的显微组织和力学性能。结果表明:复合材料中的漂珠分布均匀,主要由α-Mg、Mg17Al12、Mg2Si、MgO等物相组成;复合材料的硬度随漂珠含量增加而增大;当漂珠的质量分数为6%、平均粒径为60μm时,复合材料的硬度最高,为82.1HBW;当漂珠的平均粒径为90μm、质量分数为6%时,复合材料的抗压强度最高,为348.3 MPa;复合材料的断裂方式是以解理断裂为主的脆性断裂,漂珠在复合材料断裂过程中发生破损。 展开更多
关键词 漂珠 镁基复合材料 颗粒增强 力学性能
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粉煤灰微珠负载碘氧化铋复合催化剂的光催化性能 被引量:1
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作者 张则东 张进 张钰国 《化工环保》 CAS CSCD 北大核心 2018年第6期716-719,共4页
在固体废弃物粉煤灰微珠(FACs)上负载BiOI,通过水热法制备了BiOI/FACs复合催化剂。运用XRD、SEM、EDS、UV-VisDRS等技术对复合催化剂进行了分析表征。表征结果显示:FACs为壁薄中空的球形,粒径约100μm,壁厚约为3μm;BiOI为片状,直径约2... 在固体废弃物粉煤灰微珠(FACs)上负载BiOI,通过水热法制备了BiOI/FACs复合催化剂。运用XRD、SEM、EDS、UV-VisDRS等技术对复合催化剂进行了分析表征。表征结果显示:FACs为壁薄中空的球形,粒径约100μm,壁厚约为3μm;BiOI为片状,直径约2μm,颗粒团聚成球花状;球花状的BiOI负载在FACs表面;BiOI/FACs复合催化剂主要含Fe、Si、Al、Bi、I、O等元素。BiOI/FACs复合光催化剂具有较高的可见光催化活性,禁带宽度为1.74 eV。采用4 g/L的BiOI/FACs复合催化剂处理10 mg/L的亚甲基蓝溶液,在300 W氙灯照射240 min后,亚甲基蓝去除率达91%。重复使用4次亚甲基蓝去除率仍达80%。 展开更多
关键词 光催化 粉煤灰微珠 碘氧化铋 可见光
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漂珠/镁合金可溶复合材料切削加工表面粗糙度及其预测模型 被引量:1
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作者 牛亚峰 刘恩洋 +1 位作者 于思荣 刘林 《轻合金加工技术》 CAS 北大核心 2019年第10期51-57,共7页
为研究漂珠/镁合金可溶复合材料的切削加工质量,采用正交试验法对漂珠/镁合金可溶复合材料进行了不同切削参数下的切削加工试验。研究结果表明:进给量对切削加工表面粗糙度影响最大,其次是切削深度,切削速度影响最小;试样表面微观形貌... 为研究漂珠/镁合金可溶复合材料的切削加工质量,采用正交试验法对漂珠/镁合金可溶复合材料进行了不同切削参数下的切削加工试验。研究结果表明:进给量对切削加工表面粗糙度影响最大,其次是切削深度,切削速度影响最小;试样表面微观形貌呈平行沟槽状,且其深度和宽度随粗糙度的增大而增大;进给量通过影响试样表面相邻锯齿峰之间的宽度影响试样表面粗糙度;运用回归分析法建立了漂珠/镁合金可溶复合材料切削加工表面粗糙度预测模型,并通过方差分析和实验验证表明模型拟合良好,可以实现对复合材料切削加工表面粗糙度的预测和控制。 展开更多
关键词 漂珠 可溶复合材料 切削加工 表面粗糙度 预测模型
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Synthesis of novel CeO_2–BiVO_4/FAC composites with enhanced visible-light photocatalytic properties 被引量:7
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作者 Jin Zhang Bing Wang +3 位作者 Chuang Li Hao Cui Jianping Zhai Qin Li 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2014年第9期1936-1942,共7页
To utilize visible light more effectively in photocatalytic reactions, a fly ash cenosphere (FAC)-supported CeO2-BiV04 (CeO2-BiVO4/FAC) composite photocatalyst was prepared by modified metalorganic decomposition a... To utilize visible light more effectively in photocatalytic reactions, a fly ash cenosphere (FAC)-supported CeO2-BiV04 (CeO2-BiVO4/FAC) composite photocatalyst was prepared by modified metalorganic decomposition and impregnation methods. The physical and photophysical properties of the composite have been characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and energy dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS), and UV-Visible diffuse reflectance spectra. The XRD patterns exhibited characteristic diffraction peaks of both BiVO4 and Ce02 crystalline phases. The XPS results showed that Ce was present as both Ce4+ and Ce3+ oxidation states in Ce02 and dispersed on the surface of BiV04 to constitute a p-n heterojunction composite. The absorption threshold of the CeO2-BiVO4/FAC composite shifted to a longer wavelength in the UV-Vis absorption spectrum compared to the pure Ce02 and pure BiV04. The composites exhibited enhanced photocatalytic activity for Methylene Blue (MB) degradation under visible light irradiation. It was found that the 7.5 wt.% CeO2-BiVO4/FAC composite showed the highest photocatalytic activity for MB dye wastewater treatment. 展开更多
关键词 Ce02BiV04fly ash cenospheres (facs)PhotocatalysisComposites
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漂珠/AZ91D复合材料微观组织与性能 被引量:4
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作者 刘恩洋 于思荣 +4 位作者 赵严 李凡国 张善保 李景达 袁明 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2017年第11期3298-3304,共7页
采用搅拌铸造法,向镁合金熔体中添加漂珠,制备了漂珠/AZ91D复合材料,研究了该复合材料微观组织的均匀性、相组成、力学性能和阻尼性能。结果表明,漂珠在基体中分布均匀,无偏聚现象。在复合材料制备过程中,漂珠与镁合金熔体发生反应并被... 采用搅拌铸造法,向镁合金熔体中添加漂珠,制备了漂珠/AZ91D复合材料,研究了该复合材料微观组织的均匀性、相组成、力学性能和阻尼性能。结果表明,漂珠在基体中分布均匀,无偏聚现象。在复合材料制备过程中,漂珠与镁合金熔体发生反应并被填充,使得复合材料中有Mg_2Si和MgO相生成。与基体合金相比,复合材料的力学性能和阻尼性能均得到明显提高。复合材料的断裂是以解理断裂为主的脆性断裂,在断裂过程中漂珠壁被撕裂。复合材料的阻尼机制主要是位错阻尼和界面阻尼。 展开更多
关键词 漂珠 镁基复合材料 微观组织 力学性能 阻尼性能
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