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Preparation and Properties of La2/3Sr1/3MnO3: Agx Polycrystalline Composites Yizhi Yana, Xiang Liu*, Qingming Chen, Shaochun Zhang Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China * lxjim@126.com, ayanyizhi2005@163.com Key words: LSMO: Agx; Co-precipitation; Polycrystalline composites; Z value Abstract: La2/3Sr1/3MnO3:Agx (LSMO:Agx) polycrystalline composites were prepared by co- precipitation method.
It is believed that various exchange interactions, structural distortions, cationic disorders and grain boundary effects are primary ingredients for the induction of rich phenomenology in these materials [10, 11].
High pure (99.99%) La(NO3)3, Sr(NO3)2, Mn(CH3COO)2, and Ag2O were taken as a starting material.
Acknowledgements This work is supported by the National Natural Science Foundation of China (Numbers: 50974066 ) and Natural Science Foundation of Yunnan (Numbers: 2009ZC013M).
Journal of Magnetism and Magnetic Materials. 248 (2002) 26-33

Henan Building Materials, (4) (2010) 87~93
Shanghai Building Materials, (1) (2000) 38~40
Journal of Hazardous Materials, 51(4) (1996) 47-65
Journal of Hazardous Materials, 116(1) (2008) 1-8
Beijing: China building materials science research institute, (2008) 30~31

Experiment Materials.The primary raw materials of the experiment were low rank fly ash, limestone, soda, dispersing agent systhesized in the laboratory and CO2.
The results of the orthogonal tests show that the calcination temperature and the ration of CaO/SiO2 are the main factors influencing the self-pulverization of sintered materials. the sintered materials, with the ratio of CaO/SiO2 as 2.5, was calcinated at 1260℃ for 1h, then cooled to 600℃ for 1h, finally can be self-pulverized completely.
International Journal of Coal Geology, 2010,81(4):320-332 [2] M.J. 
Journal of Materials Research, 1998,13:1075-1083 [4] C.
Synthesis of alumina from high purity alum derived from coal fly ash[J].Materials Science and Engineering A, 2004,367(12):166-170

Study of hydrophilic films on copper tube Zhang Qiao-Yun, Chen Ze-Min and Qi Meng-Long Chemistry and Material Science Institute of Langfang Teachers College, Langfang, Hebei, 065000,China zhangqy810@sina.com Keywords: copper tube, hydrophilic angle, silica solution, acrylate Abstract: Copper tube was the air conditioner heat dissipation commonly used material, their hydrophilic and corrosion resistance was great significance to improve the air conditioner heat dissipation effect and the service life.
Introduction Copper had excellent thermal conductivity, usually as heat exchanger materials, but the copper surface was not hydrophilic, and impacted heat transfer, it was necessary to hydrophilic treatment of the copper; at the same time, the corrosion of the copper surface can not be ignored.
In this paper, with silica sol and acrylic material, we had developed a effective method to improve the hydrophilic and corrosion resistance surface of the copper heat exchanger.
Table 1 Performance comparison of the passive film and hydrophilic film test item performance index hydrophilic film BTA passive film AMT passive film film appearance tinted white copper colour copper colour film thickness 2μm 2μm 2μm corrosion resistance 10s 12s 13s hydrophilic angle 13° 98° 101° From Table 1, we can see that the corrosion resistance of hydrophilic film and passive film both arrived to the needs standard, the hydrophilic film was better than the passive film in the hydrophilic property, so this hydrophilic film was good property of air conditioner heat dissipation. 3 Conclusion In this thesis, with silica sol and acrylic material, we had developed a effective method to improve the hydrophilic and corrosion resistance surface of the copper heat exchanger.
Journal of Xi’an Polytechnic University. 24 (2010) 458-465.

Researchers around the world continuously explore new methods and materials to improve the existing injection technology [9-10].
Experiments Experimental material Double functional polyurethane acrylate, Zhongshan qianye new materials co., LTD.； Hyper-branched special functional acrylic ester, Dongtou county hengli printing materials co., LTD.； Trimethylol propane triacrylate, TMPTA, Jiangsu litian technology co., LTD.； Tripropylene glycol diacrylate, TGPDA, Jiangsu litian technology co., LTD.； Photoinitiator1173 (2-hydroxy-2-methyl-1-phenyl-1-acetone), Changsha Xinyu Polymer Technology Co., Ltd.
Reference [1] Santos R J，Teiaeira A M，Lopes J C B．Study of mixing and chemical reaction in RIM [J]．Chemical Engineering Science，2005，60(8)：2381-2398
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Sieniawski, Nickel and titanium alloys in aircraft turbine engines, Advances in Manufacturing Science and Technology 27 (2003) 23-34
Fintová, Casting defects and high temperature fatigue life of IN 713LC superalloy, International Journal of Fatigue 41 (2012) 47-51
Cygan, Influence of silicon carbide chills on solidification process and shrinkage porosity of castings made of nickel based superalloys, International Journal of Cast Metals Research (2013)
Davies, Fundamental aspects of hot isostatic pressing: An overview, Metallurgical and Materials Transactions A 31 (2000) 2981-3000
Cwajna, A complex procedure for describing porosity in precision cast elements of aircraft engines made of MAR-M 247 and MAR-M 509 superalloys, Materials Characterization 56 (2006) 405-413.

The most important one is the high cost of the binder itself and, consequently, of the materials produced from it.
This raises the need to search for alternative materials to replace cement completely or partially.
Generally, these are mineral materials capable of binding free calcium dioxide during the hardening process.
Bouchenafa Formulation of Modified Cement Mortars Using Optimal Combination of Fly Ashes, Shiv, and Hemp Fibers Journal of materials in civil engineering (2020) 04019354 [12] T.V.
Azik Investigation of utilization of Flyash in Self Compacting Concrete IOP Conference Series: Materials Science and Engineering (2019) 154495 [18] A.I.

The study on the corrosion resistance for polyurethane epoxy resin coating of AZ91D magnesium alloy LOU Baiyanga, DONG Lingyunb, Li Xiaoc Institute of Materials and Surface Engineering, Zhejiang University of Technology, Hangzhou 310014, P.R.China alby00518@163.com, bcailiao@zjut.edu.cn, cLiXiao@zjut.edu.cn Keywords: AZ91D magnesium alloy, polyurethane epoxy resin, organic coating Abstract: Magnesium alloys are more and more researched and used as engineering materials in recent years.
Table 1 AZ91D magnesium alloy of Chemical composition (mass fraction) Al Zn Mn Ni Fe Cu Ca Si K Mg 8.77 0.74 0.28 0.001 0.001 0.001 <0.01 <0.01 <0.01 Balance The mail coating materials include of bisphenol-a epoxy resin E20, BLR-8086 polyurethane prepolymer, polyamide 650, isocyanic acid, etc.
Journal of Alloys and Compounds, Vol.33 (2002), p.88
Applied Surface Science, Vol.120 (2008), p.1
Corrosion Science and Protection Technology, Vol.16 (2004), p.304 [7] Bellucci F.

The findings revealed that due to the rapid heat dissipation of the materials, temperature increases were minimal.
As a result, the materials manufacturing processes must also keep evolving to support for miniaturization.
A rotating tool generates frictional heat to bond materials without melting, resulting in fewer defects.
Most research focuses on materials thicker than 3mm, with limited studies on dissimilar magnesium alloy joints.
, tensile properties and corrosion behavior of friction stir processed Mg-9Li-1Zn alloy, Journal of Materials Processing Technology, vol. 267, Pages 393-402, 2019

The semi-solid material forming technology has advantages such as lower deformation resistance, good material mobility and so on [1].
The regression calculation and analysis of above equation were done by SPSS (Statistical Package for the Social Sciences).
Auriault: Mechanics of Materials Vol. 31 (1999), p. 535 [2] Y.
Ramesh: International Journal of Solids and Structures Vol. 37(2000), p. 7547 [3] H.Yan, B.
Zhou: Materials Science and Engineering: B Vol. 132 (2006), p. 179 [4] H.Yan, J.