Materials Literature
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Polycarboxy late superplasticizer was prepared by radical copolymerization of maleic anhydride,acrylic acid and sodium allylsulfonate while ammonium persulfate as initiator.The factors of reaction temperature,initiator concentration,monomers concentration were investigated.It shows that the overall observed copolymeri…
Test and analysis of corona loss of transmission line is one of the main research contents concerning 1 000 kV UHV transmission and transformation project. The corona loss of transmission line is influenced by many factors related with weather in which rainfall intensity effects corona loss most remarkably. By monitor…
In this paper,we used the chemical oxidative method to synthesize the poly(3-hexylthiophene) (P3HT) by anhydrous ferric chloride(FeCl3)as the oxidant. The influence of reaction time and mole ratio of FeCl3/3HT on the conversion was studied. The results show that the conversion rate increases with the reaction time and…
Wettability is one of the most important properties which weighs hydrophobic capability of superhydrophobic surface. There are close relations between microcosmic structure and wettability of superhydrophobic surface. In this paper Wenzel model and Cassie model which bring on superhydrophobic phenomenon were discussed…
Regenerated cellulose film is prepared successfully from sugarcane bagasse cellulose in ionic liquid 1-allyl-3-methylimidazolium chloride ([Amim]Cl).Its dissolution process was viewed by polarizing microscope.Properties and structures of the regenerated cellulose films obtained were characterized by infrared spectrosc…
Tetrabromobisphenol A(TBA) epoxy bromine carbon resin was prepared by using tetrabromobisphenol A with step-reaction polymerization.Then,waterborne curing agent was prepared by using triethylene-tetramine and tribromide phenol glycidyl ether through addition reaction.Further,a sizing agent with waterborne epoxy bromin…
Zirconium diboride has been prepared by a solution precursor conversion method. The precursor was obtained by reaction of polyzirconoxane (PZO),boric acid and phenolic resin dissolved in ethanol,and ZrB2 powder was obtained by subsequent pyrolysis of the precursor at relatively low temperature (1600 ℃). The precursor…
Vacuum thermal reduction kinetics of calcined dolomite with Al-Si-Fe alloy was studied using shrinking unreacted-core model. The effects of pellet forming pressure, reduction temperature (T), and villaumite on reduction rate (R) of calcined dolomite were investigated. The results show that within the pellet forming pr…
Microscale V-shaped impact pits are formed on copper surfaces after sandblasting.After surface oxidation,the whole copper surface is uniformly and completely covered by petal-like CuO nanosheets.Micro-and nanoscale structures are fabricated by a combination of sandblasting and surface oxidation,which leads to a high w…
Batch experiments were conducted to evaluate the performance of saponin as a biosurfactant for removal of heavy metals from contaminated soils.The effects of concentration and pH of the saponin solution on the desorption of metals from soils by saponin washing were investigated.Higher saponin concentration and lower p…
The differences between IEC/TS 60815-1 and -2:2008 and IEC/TR 60815:1986 are briefly introduced.The methods of dimensioning and selection of high-voltage insulators used in polluted conditions specified in IEC/TS 60815-1 are also explained based on the artificial and natural pollution test results from Pollution Test…
The main results on preparation of amorphous composite materials with doped outside strengthening phases,made by Sheyang National Laboratory for Materials Science are introduced.Controlling solidification process,the amorphous composite materials with excellent properties have been obtained.The compression strength an…
Cateniporids as one of the groups of tabulate corals are characterized by having the chainlike corallum. They are commonly distributed in Ordovician and Silurian rocks. The criteria for taxonomy of cateniporids still have been disputed as to diagnosis and scope of genera included in this group. Based on published data…
B4C/Al composite was fabricated by pressureless infiltration.The phase and microstructure of the composite were studied by XRD,EDS,SEM,TEM and optical microscopy.The results show that,Al3BC forms on the interface of B4C and Al,connecting aluminum with ceramic toughly.AlB2 as strip crystal forms between B4C and Al,whic…
We focused on the flashover mechanism on wet contaminated composite insulator when bird streamer dropping by the insulator using iron wires,and investigated the low temperature nature of silicon rubber.We think that the contamination layer on the insulator may be saturated when unexplained flashover typically occurs.T…
The microstructure evolution of 7050 aluminum alloy plates after homogenization was studied by optical microscopy,transmission electron microscopy,hardness and electric conductivity measurements.The influence of such processing on the quenching sensitivity was investigated by different homogenization methods.The resul…
Zinc calcium phosphate conversion films were prepared via chemical deposition on AZ31 magnesium alloy.The influence of the temperature of phosphate baths on the surface morphologies of phosphate conversion films on AZ31 magnesium alloy and their corrosion resistance were investigated by scanning electron microscopy(SE…
Improving the hydrophobic property for hydrophobic membrane could make it have wider use in many areas,such as membrane distillation,membrane absorption,and so on.In this paper,we prapared the super-hydrophobic polyvinylidene fluoride(PVDF) membranes by non-solvent induced phase separation,researched the influences of…
Fe74Cr2Mo2Sn2P10Si4B4C2 flakes were prepared by water atomization and ball milling.The microwave absorbers of flakes oriented distributed were prepared by coating process and the random distributed ones were prepared by non-coating process.The effect of orientation on the electromagnetic properties was discussed.The r…
The self-inoculant with the same composition as the melt of alloy was introduced into the melt.The effects of the inoculant parameters,such as addition method,particle size,addition amount and precursor microstructure,on grain refinement were investigated.The results indicate that the grain size of AM60 alloy is refin…