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Effect of Fe_(2)O_(3)on the Structure,physical properties and Crystallization of CaO-Al_(2)O_(3)-SiO_(2)Glass

Journal of Wuhan University of Technology(Materials Science) 2024年第4期39卷 954-961页

作者：张峰 XIONG Dehua 谢俊张继红 HAN Jianjun CHEN Dequan WEN Zhongquan FAN Zhenhua CHEN Lina SUN Tengfei State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070China Hepu Research Center for Silicate Materials Industry Technology Beihai 536100China Hainan Institute of Wuhan University of Technology Sanya 430079China Shenzhen Research Institute of Wuhan University of Technology Shenzhen 518000China Chongqing Polycomp Inter-national Corporation Chongqing 400400China

The calcium aluminosilicate-based glasses(CaO-Al_(2)O_(3)-SiO_(2),CAS)with different Fe_(2)O_(3)content(0.10wt%,0.50wt%,0.90wt%,and 1.30wt%)were prepared by traditional melt-quenching *** glass network structure,thermal and mechanical properties,and crystallization behavior changes were investigated by nuclear magnetic resonance spectrometer,Fourier-transform infrared spectro-photometer,X-ray diffractometer,differential scanning calorimetry and field emission scanning electron microscope *** change of Q^(n)in glass structures reveals the glass network connectivity decreases due to the increasing content of Fe_(2)O_(3)addition,resulting in the increasing of non-bridging number in glass *** glass densities slightly rise from 2.644 to 2.681 g/cm^(3),while Vickers’s hardness increases at first,from 6.469 to 6.901 GPa,then slightly drops to 6.745 GPa,with Fe_(2)O_(3)content *** is almost no thermal expansion coefficient change from different Fe_(2)O_(3)*** glass transmittance in visible range gradually decreases with higher Fe_(2)O_(3)content,resulting from the strong absorption of Fe^(2+)and Fe^(3+)*** calculated activation energy from thermal analysis results first decreases from 282.70 to 231.18 kJ/mol,and then increases to 244.02 kJ/mol,with the Fe_(2)O_(3)content increasing from 0.10wt%to 1.30wt%.Meanwhile,the maximum Avrami constant of 2.33 means the CAS glasses exhibit two-dimensional *** of the CAS glass-ceramics samples contain main crystal phase of anorthite,the microstructure appears lamellar and columnar crystals.

关键词： calcium aluminosilicate glass network structure physical properties crystallization

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Progress in the preparation and physical properties of two-dimensional Cr-based chalcogenide materials and heterojunctions

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Frontiers of physics 2024年第2期19卷 105-130页

作者： Xiulian Fan Ruifeng Xin Li Li Bo Zhang Cheng Li Xilong Zhou Huanzhi Chen Hongyan Zhang Fangping OuYang Yu Zhou School of Physics and Electronics Hunan Key Laboratory of Nanophotonics and DevicesCentral South UniversityChangsha 410083China Jincheng Research Institute of Opto-mechatronics Industry Jincheng 048000China Shanxi Key Laboratory of Advanced Semiconductor Optoelectronic Devices and Integrated Systems Jincheng 048000China School of physical Science and Technology Xinjiang UniversityUrumqi 830046China State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China

Two-dimensional transition metal dichalcogenides(TMDs)exhibit promising application prospects in the domains of electronic devices,optoelectronic devices and spintronic devices due to their distinctive energy band structures and spin−orbit coupling ***-based chalcogenides with narrow or even zero bandgap,covering from semiconductors to metallic materials,have considerable potential for wide-band photodetection and two-dimensional ***,the preparation of 2D CrX_(n)(X=S,Se,Te)nanosheets primarily relies on chemical vapor deposition(CVD)and molecule beam epitaxy(MBE),which enable the production of high-quality large-area *** review article focuses on recent progress of 2D Cr-based chalcogenides,including unique crystal structure of the CrX_(n)system,phase-controlled synthesis,and heterojunction ***,a detailed introduction of room-temperature ferromagnetism and electrical/optoelectronic properties of 2D CrXn is ***,this paper summarizes the challenges associated with utilizing 2D Cr-based chalcogenides in preparation strategies,optoelectronics devices,and spintronic devices while providing further insights.

关键词： physical properties two-dimensional materials Cr-based chalcogenide controlled synthesis heterojunction eletronic and optoelectronic devices

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physical-Rheological properties and Performances of Rejuvenated(Styrene-Butadiene-Styrene)Asphalt with Polymerized-MDI and Aromatic Oil

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Fluid Dynamics & Materials Processing 2024年第7期20卷 1633-1646页

作者： Ao Lu Ming Xiong Chen Chen Liangjiang Li Haibei Tan Xiong Xu Hubei Regional Management Headquarters CCCC Asset Management Co.Ltd.Beijing101399China School of Civil Engineering and Architecture Wuhan Institute of TechnologyWuhan430073China Hubei Provincial Engineering Research Center for Green Civil Engineering Materials and Structures Wuhan Institute of TechnologyWuhan430073China

Traditional asphalt rejuvenators,like aromatic oil(AO),are known to be effective in improving the low-temperature properties and fatigue performances of aged SBS(styrene-butadiene-styrene)modified asphalt(SBSMA)binders and ***,these rejuvenators inevitably compromise their high-temperature properties and deformation resistances because they dilute asphalt binder but do not fix the damaged structures of aged *** this study,a highly-active chemical called polymerized 4,4-diphenylmethane diisocyanate(PMDI)was used to assist the traditional AO asphalt *** physical and rheological characteristics of rejuvenated SBSMA binders and the moisture-induced damage and rut deformation performances of corresponding mixtures were comparatively *** results showed that the increasing proportion of AO compromises the hightemperature property and hardness of aged SBSMA binder,and an appropriate amount of PMDI works to compensate such losses;3%rejuvenator at mass ratio of AO:PMDI=70:30 can have a rejuvenated SBSMA binder with a high-temperature performance similar to that of fresh binder,approximately at 71.4°C;the use of AO can help reduce the viscosity of PMDI rejuvenated SBSMA binder for improving its workability;PMDI can help improve the resistance of AO rejuvenated SBSMA binder to deformation,especially at elevated temperatures,through its chemical reactions with aged SBS;moisture induction can enhance the resistance to damage of rejuvenated mixtures containing AO/PMDI or only PMDI;and the rejuvenator with a mass ratio of AO:PMDI=70:30 can lead the rejuvenated mixture to meet the application requirement,with a rut depth of only 2.973 mm,although more PMDI can result in a higher resistance of rejuvenated mixtures to high-temperature deformation.

关键词： Aged SBS modified asphalt polymerized 4,4-diphenylmethane diisocyanate aromatic oil physical properties rheological properties mixture performance

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physical and mechanical properties and microstructures of submarine soils in the Yellow Sea

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Deep Underground Science and Engineering 2024年第2期3卷 197-206页

作者： Zhuangcai Tian Yihua Chang Sichao Chen Gengchen Wang Yanhong Hu Chuan Guo Lei Jia Lei Song Jianhua Yue State Key Laboratory for Geomechanics and Deep Underground Engineering China University of Mining and TechnologyXuzhouChina School of Mechanics and Civil Engineering China University of Mining and TechnologyXuzhouChina Research Center for Deep Ocean Science and Underwater Engineering China University of Mining and TechnologyXuzhouChina School of Resources and Geosciences China University of Mining and TechnologyXuzhouChina

In recent years,the exploration of seabed has been intensified,but the submarine soils of silt and sand in the Yellow Sea area have not been well investigated so *** this study,the physical and mechanical properties of silt and sand from the Yellow Sea were measured using a direct shear apparatus and their microstructures were observed using a scanning electron *** test results suggest that the shear strength of silt and sand increases linearly with the increase of normal *** on the direct shear test,the scanning electron microscope was used to observe the section surface of *** is observed that the section surface becomes rough,with many“V”‐shaped *** particles appear on the surface of the silt structure and tend to be *** X‐ray diffraction experiment reveals that the sand and silt have different *** shear strength of sand is slightly greater than that of silt under high stress,which is related to the shape of soil particles and the mineral *** results can be a reference for further study of other soils in the Yellow Sea;meanwhile,they can serve as soil parameters for the stability and durability analyses of offshore infrastructure construction.

关键词： direct shear test microscope physical properties submarine soil Yellow Sea

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physical and Chemical properties of Horns Sheaths Particles for the Manufacture of Composite Materials

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Journal of Materials Science and Chemical Engineering 2024年第5期12卷 1-9页

作者： Tawe Laynde Zakari Yaou Karga Tapsia Lionel Konai Noel Danwe Raidandi Department of Wood Construction University Institute for Wood Technology University of Yaounde 1 Yaounde Cameroon Department of Industrial and Mechanical Engineering National Advance School of Engineering University of Yaounde 1 Yaounde Cameroon Department of Mechanical Petroleum and Gas Engineering National Advance School of Mines and Petroleum Industries University of Maroua Maroua Cameroon

Salvaged cow horns from slaughterhouses have been transformed into fine particles for a physical characterization that has led us to determine the humidity rate (2.34% ± 0.054%), the actual density situated between 0.586 g/cm3 and 0.732 g/cm3, the swelling rate (12%), and one chemical characterization that permitted us to determine the rate of dry matters (97.05%), of mineral matters (2.5%), of protein matters (94.52%). From these weak values, it can easily be seen that cow horn case doesn’t absorb much water and improve the mechanical characteristics of the composite;the high rate of protein shows that keratin which is the structural molecule favors its gripping as reinforcing element in the manufacturing of composite materials.

关键词： Horns Fibers Polymer Loads physical properties Chemical Composition

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Mechanical and physical properties of Pineapple Leaf and Sun Hemp Fibre Reinforced Hybrid Natural Composite Fabricated by Compression Moulding Method

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Journal of Bionic Engineering 2022年第1期19卷 257-267页

作者： A.Arun Premnath Centre for Composite Science and Tribology Sri Chandrasekharendra Saraswathi Viswa MahavidyalayaKanchipuramTamilnadu631561India

The implementation of natural fibres in polymer composites will result in biodegradable,low cost,recyclable materials for automobile and structural *** the process of making natural fibre composites viable in the global market,it is essential to understand its mechanical and physical *** the present investigation,mechanical and physical properties of pineapple Leaf(PALF)and Sun Hemp(SH)Fibre reinforced with epoxy matrix was studied in terms of weight(wt)%of fibre loading and chemical *** composites were fabricated by compression moulding technique with PALF fibre content varying from 10,15 and 20%of weight *** PALF and SHF were treated with NaOH solution for 1 h at room *** various mechanical properties such as tensile,compression,flexural and impact strength were measured as per ASTM *** density and water absorption were also measured to study the physical properties of the fabricated *** treated composites exhibit a rough surface because of the removal of the cellulose layer which results in better adhesion between the matrix/fibre interface than untreated *** NaOH treated fibres composites outperformed untreated fibre composites in terms of mechanical and physical properties except for impact *** morphological studies of the worn surfaces are examined using Scanning Electron Microscope(SEM).

关键词： Pineapple leaf fibre Compression moulding Mechanical properties physical properties Morphological studies

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Effects of cementation on physical properties of clastic rock-originated weathering crust reservoirs in the Kexia region,Junggar Basin,NW China

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能源地球科学(英文) 2023年第1期4卷 74-82页

作者： Changhai Gao Shida Meng Jiahao Zhang Jian Wang Yifei Sun Shandong Provincial Key Laboratory of Deep Oil and Gas China University of Petroleum(East China)QingdaoShandong266580China Shandong Provincial Key Laboratory of Reservoir Geology China University of Petroleum(East China)QingdaoShandong266580China

Cements are widely developed in clastic rock-originated weathering crust(CWC)reservoirs in the Kexia region along the northwestern margin of the Junggar Basin and significantly affect reservoir physical properties and oil and gas distribution in this *** on the CWC reservoirs at the top of both the Permian Jiamuhe Formation and the Triassic Karamay Formation,this study analyzed the types and characteristics of cements in the reservoirs and explored their effects on reservoir physical properties based on thin sections,SEM images,XRD results,and tests of physical *** main results are as *** cements in the CWC reservoirs in Kexia region mainly consist of carbonate minerals(41.5%),clay minerals(27.8%)and zeolite minerals(30%),as well as small amount of siliceous *** them,the carbonate minerals are dominated by siderite and calcite,the clay minerals mainly include kaolinite,interstratified illite/smectite(I/S)and chlorite,and the zeolite minerals primarily comprise heulandite and *** different types of multiphase cements are generally paragenetic or associated and affect reservoir physical properties to different ***,the carbonate and clay cements of the early diagenetic stage reduced the reservoirs’average porosity from 21%to 15%.The dissolution of some carbonate and zeolite cements in the early A substage of the middle diagenetic stage restored the average porosity to 18%,and the cementation in the late A substage decreased the average porosity to 13%again,of which about 4%was reduced by carbonate *** average porosity of the CWC reservoirs gradually decreased to the current value of approximately 10%in the B substage of the middle diagenetic *** impact of cementation on the CWC reservoirs can reach as far as 70 m below the ***,the types and contents of cements vary with their depth below the unconformity surface,leading to the development of multiple zones with high ce

关键词： Clastic rock-originated weathering crust Cementation characteristic physical properties Pore evolution Kexia region Junggar Basin

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Effects of Chemical Treatment on the physical properties of Typha

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Fluid Dynamics & Materials Processing 2022年第5期18卷 1409-1418页

作者： Ibrahima Diaw Mactar Faye Seckou Bodian Vincent Sambou Efficiency and Energetic Systems Research Group Alioune Diop UniversityBambeyBP 30Senegal Laboratoire Eau EnergieEnvironnement et Procédés Industriels(LE3PI)Cheikh Anta Diop UniversityDakar-FannBP 5085Senegal

Plant-based concretes are produced from plant aggregates and a *** fibers are mainly composed of saccharides(sugars)and these sugars can decrease the concentration of Ca2+ions in the cement pore solution and delay the formation of hydration *** improve the interfacial bond between fibers and matrix a chemical treatment is widely *** study investigates the effect of sodium hydroxide treatment on physical and hygroscopic properties of Typha *** particular,a 5%sodium hydroxide solution is used to treat these aggregates and their bulk and absolute densities,porosity,water content and water absorption are evaluated *** indicate that bulk and absolute densities increase after treatment from 56.44 kg/m^(3) to 122.57 kg/m^(3) and 541.93 kg/m^(3) to 555.17 kg/m^(3),*** treatment reduces porosity of Typha from 89.58%to 77.92%and decreases water content from 1.4%to 1%.The treatment with sodium hydroxide reduces substantially the water absorption of the aggregates.

关键词： Sodium hydroxide treatment typha aggregates hygroscopic properties physical properties

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physical properties in Drying of Food Products with Combined Sublimation and Evaporation

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Chinese Journal of Chemical Engineering 2004年第6期12卷 814-817页

作者： Ingvald Strфmmen Odilio Alves-Filho Trygve M.Eikevik Ingrid C.Claussen Department of Refrigeration and Air Conditioning The Norwegian University of Science and Technology (NTNU) Trondheim NorwaySINTEF Energy Research Department of Refrigeration and Air Conditioning Trondheim NorwaySINTEF Energy Research Department of Refrigeration and Air Conditioning Trondheim NorwayDepartment of Refrigeration and Air Conditioning The Norwegian University of Science and Technology (NTNU) Trondheim Norway

Drying is an important unit operation in processing of biological resources. The drying process may influence the product properties and quality, which may shrink, break or undergo rheological, physical and biochemical changes. The important parameters responsible for such changes are drying conditions, type of drying technology and residence drying time. Thermal conductivity, thermal-mass diffusivity, enthalpy, porosity and density are the main material property and heat-mass transfer parameters, which are essential for understanding the changes in product quality and for designing and dimensioning the drying processes. In this paper physical properties of food products undergoing a combined sublimation and evaporation were studied. Pieces of vegetables and potatoes were dried in a heat pump fluidized bed dryer at combined modes with temperatures below the freezing point in the beginning and a final drying step at temperatures above the freezing point. Samples of products were tested at different moisture contents with respect to physical properties. physical properties of leek and potato samples were measured and mass diffusivities were determined from drying kinetic data. Based on bulk density and rehydration measurements it was clearly observed that drying temperature and modes influenced the final product physical properties. The potato cube run dried with initial atmospheric freeze-drying step had rehydration ability 430%above a run dried only above the freezing point. The average effective mass diffusivity for 5 mm slabs of leek was 0.5 x 10-11m2·s-1 for the sublimation stage and 2.2 x 10-11m2·s-1 for the evaporation stage.

关键词： physical properties dying food products sublimation evaporation

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physical properties,Morphology and Petrological Characteristics of Pumices from the Central Indian Ocean Basin

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Acta Geologica Sinica(English Edition) 2011年第4期85卷 826-839页

作者： Niyati G.KALANGUTKAR Sridhar D.IYER Dandaydayudapani ILANGOVAN National Institute of Oceanography(Council of Scientific and Industrial Research) Dona PaulaGoa 403 004India

About 400 pumice clasts collected from the Central Indian Ocean Basin（CIOB）were studied for their morphology and were classified based on their shape and size.A majority of the samples range between1 cm and 36 cm and in the Zinggs shape diagram plot in the equant and oblate *** Corey Shape Factor for most of the samples is close to 0.7,which is common for volcaniclastic material. The physical properties such as density,specific gravity,void ratio,porosity,moisture content and degree of saturation,were determined for 30 pumice *** varies from 0.21 to 0.74 g/cm^3 specific gravity 1.84 to 3.27,void ratio 2.21 to 10.67,porosity 67%to 91%,moisture content during sinking 0.44 to 2.35 and degree of saturation varies from 26.5%to 86%.Binocular and electron microscopy studies reveal that 60%of the vesicles are elongated,30%are spherical and 10%are *** of the pumices exhibits vitrophyric texture with phenocrysts of feldspars and clinopyroxenes.X-ray diffractrogram and mineral analyses confirm plagioclase to be a major phase, while quartz and orthoclase are not *** is commonly present in the ferromanganese oxide coating present over some of the *** paper also delves into some details concerning the controversial origin of the pumices and glass shards in the CIOB.

关键词： pumice physical properties submarine Central Indian Ocean Basin

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