Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Membrane electrode is a key component of proton exchange membrane fuel cell(PEMFC).This paper reviews recent advances in membrane material,electrode catalyst and gas diffusion layer based on its structure,including Nafion modified membrane,SPA / SPE(sulfonated poly aromatic hydrocarbons) class film,Pt modified catalys…
To characterize the livestock pollution in Jiangsu province,the pollution sources,production and discharge of pollutants and pollution control were studied according to the 2011 annual pollution of livestock statistics in Jiangsu province.It was found that there was a steady increase in the scale of livestock and poul…
The determination of blank size in the compound casting-rolling process for ring has been studied in the text.The relationship between rolling ratio,blank inner diameter,and ring inner diameter has been obtained.The results show that any ring size appointed can get the exact rolling ratio and blank inner diameter rapi…
Cu nanopowders were used to improve the performance of iron based alloy products formed by high velocity compaction.Under the condition that Cu powders were remain unchanged as a constant of 1.5%,part or all of Cu micropowders were replaced by Cu nanopowders.Seven kinds of iron-based alloy product samples in which the…
A review is given about the application of rare earth in corrosion protection of iron and steel,Al and its alloy,Zn and galvanized steel sheet,Mg and its alloy,Cu and its alloy,as well as other alloys. The corrosion inhibition mechanism of rare earth conversion coatings is discussed. Furthermore,it is pointed out that…
Al thin films were respectively deposited by DC magnetron sputtering on the flexible substrates,such as the polyester,the aramid and the cotton etc.The deposition rate,structure and surface morphology of the aluminum thin films were studied.The results show that the deposition rate increases almost linearly with incre…
The chitosan samples with various degree of deacetylation were prepared by the reaction of N-acetylation between chitosan and acetic anhydride.The samples were characterized by FTIR and ultraviolet spectrum.The mechanical and fat resistance properties of hand-sheet coated by chitosan with different D.D.value were meas…
The method thiocyanate differential colorimetry that determines the content of tunsten in tungsten concentrates was introduced in the paper.We analyzed the reference material and samples and the results was in accordance with the results from cinchonine gravimetric method.The data had proved the method to be accurate,…
In this paper,hydroxyl-functionalized SPEEK was obtained using NaBH4as reducing agent. Ionic liquid 1-carboxy methyl-3-methylimidazolium chloride grafted to hydroxyl-functionalized SPEEK by esterification reaction,the graft polymer obtained.The experimental results showed that the ionic liquid modified SPEEK membrane…
Ammonium aluminum carbonate hydroxide was synthesized as the precursor of Al2O3 by precipitation reaction using ammonium aluminum sulfate and ammonium bicarbonate under different pH values.The precursor was agglomerated to obtain Al2O3 powders.XRD and SEM were used to characterize Al2O3 powders.The results show that t…
The maximum capacity of pig-manure fertilization for the rice paddy in subtropical areas were determined,in order to understand the best way of pig-manure treatments by land. The purposes of treatments were to reduce the livestock waste emission,and to reduce the usage of chemical fertilizer,for general purpose of pre…
Based on elastic-plastic finite element method,the finite element model for the forming process of butt-welded pipe has been developed and the reasons for surface scratching has been analyzed.Meanwhile,the solution measures were proposed.It would lead to the surface scratching only as the linear velocity of the strip…
1,5-Diazabicyclo[4,3,0]nonane was prepared via1,5-diazabicyclo[4,3,0]nonene(DBN) reduced with LiAlH 4 at 55 ℃ for 9 h.The yield and purity of the product can achieve 87.9% and 95%,respectively.Then the novel amidine photobase generators was synthesized through the reaction of 1,5-diazabicyclo[4,3,0]nonane with corresp…
The gearbox output shaft belongs to heavy axial forging.Aiming at problem of the bad quality of the forging for the gearbox output shaft,the two times upsetting and stretching were proposed,and the forging process was simulated by Deform-3D.The simulated results show that two times upsetting and stretching can obtain…
Studies were made over the cast structure,density,mechanical performance of horizontal continuous cast brass rod after it being added in electromagnetic field,and further analysis to the impact of electromagnetic field to complex brass casting was made and presented in this paper.In the experiments,normal horizontal c…
A good quality of 00Cr22Ni5Mo3N duplex stainless steel was gotten by strict control of steel Creq/Nieq,purity,micro-alloy composition,heating process,hot rolling process and solution treatment process.
In order to study the corona-resistance mechanism of the polyimide films,the home-made nano-hybird polyimide films were treated with different corona pre-treatment time.The corona-resistance life and thermally stimulated depolarization current(TSDC) of the treated samples were tested.The results show that the corona-r…
Copper oxide nanorods/graphene oxide(CuO-NRs /GO)as a new composite material was prepared by electrostatic adhesion of GO on the surface of CuO nanorods.The morphology and structure of the composite were characterized by X-ray powder diffraction(XRD),transmission electron microscopy(TEM),scanning electron microscopy(S…
The risk in mixed storage of encapsulated ammonium persulfate gel breaker was studied.The oxidation characteristics of encapsulated ammonium persulfate gel breaker with various components were investigated.The compatibility of encapsulated ammonium persulfate gel breaker and other five kinds of chemicals were tested b…
The solubility and metastable zone width of boric acid in MgSO4-H3BO3-H2O system were determined in the temperature range from 10 ℃ to 45 ℃ by turbidity method,the formulas of nucleation were obtained and the apparent nucleation orders of boric acid were calculated.The results showed that,the presence of magnesium sul…