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Preparation of Na2S from Na2SO4 Using CO Xiaoyi Shen 1,a, Hongmei Shao 1,b, Zhimeng Wang1,c, Yuchun Zhai1,a 1School of Materials and Metallurgy, Northeastern University, Shenyang, Liaoning 110004, China ashenxy@smm.neu.edu.cn, bshm-0816@163.com, cwangzhimeng823@163.com Key words: Na2SO4·7H2O crystallization, Hexagonal wurtzite structure, Hydrothermal method, precipitant Abstract: Na2SO4 solution that was obtained from ZnSO4 solution after Zn2+ precipitation using Na2CO3 was used as raw material.
Experiments Materials and apparatus Na2SO4 solution that was obtained from ZnSO4 solution after Zn2+ precipitation using Na2CO3 was used as raw material.
Acknowledgement This work was financially supported by the Project Supported by National Natural Science Foundation of China No. 51204054 and the Fundamental Research Funds for the Central Universities N110402012.
Journal of Kunming University of Science and Technology, 36 (2011): 62-66.
Journal of Inner Mongolia university of technology, 24 (2005): 109-113.

Factors influencing acousto-ultrasonic approach to impact damage in composite materials Huanping Kong1,a , Zheng Zhang1,b,Lifei Li1,c 1School of Materials Science and Engineering, Beihang University, Beijing 100191, China akhp8706@126.com, bzhangzh@buaa.edu.cn, ctihutihu@163.com Keywords: Acousto-ultrasonic; impact damage; influencing factors; composite Abstract: This paper studied factors influencing AU detection results on different damage specimens, including simulation frequency, transducer modes and transducer location.
The propagation of emitted waves in the materials is affected by the characteristics of microstructure [3].
Combined with resonant frequency of materials, studies [4, 10] have been reported about frequency influence.
International Journal of Mechanical Sciences Vol. 43(2001), p. 1441-1456 [8] M.T.H.
Smart Structure and Materials Vol. 4326(2001), p.179-186 [12]Z.D.

The common materials that are highly used in this field are ordinary Portland cement, fly ash, lime and rice husk ash, etc.
Many materials are used to play this improvement role such as fly ash, bitumen, lime as well as Ordinary Portland cement.
Geopolymers are usually defined as the binding gels that can be resulted from the alkali activation of a suitable alumina silicate source material, these materials comprise fly ash, meta kaolin, rice husk ash, red mud, …etc.
Laskar and A.M Ahmed, Investigation on Soil–Geopolymer with Slag, Fly Ash, Arabian Journal for science and engineering, 41,2 (2016) , pp. 41393–400
Khan, Soil stabilization using lime: advantages, disadvantages and proposing a potential alternative, Research Journal of Applied Sciences, Engineering and Technology, 8(4), (2014), pp. 510–520

However, the high irreversible capacity at the first cycle and the poor cycling stability hinder a real application as active materials for anodes.
Raffaelle, Energy & Environmental Science, 2 (2009), 638-654
Zuo-long, New Carbon Materials, 22(4) (2007), 361-364
Yang, Materials Letters, 62 (2008), 3388-3390
Maier, Advanced Materials, 18 (2006), 1421-1426

[12] Mishra R.S. and Ma Z.Y. (2005),Materials Science and Engineering R, Vol.50, pp. 1-78
Cao,Materials Science and Engineering A 527 (2010) 6064–6075
Omar, Journal of Materials Processing Technology 191 (2007) 77–81
Jahazi, Materials Science and Engineering A 472 (2008) 179–186
MadhusudhanReddy,Journal of Materials Processing Technology 211 (2011) 1224–1233

Adsorption capacities of three different membrane materials such as PDMS, naffion membrane with H and Na forms were compared by immersion tests.
Experimental Materials.
Adsorption abilities of three different membrane materials such as PDMS, naffion membrane with H and Na forms were compared in this paper.
Lin, K.Ying, Y.Zhang, Journal of Membrane Science, 2008, 325:438-445
Li, Journal of Colloid and Interface Science, 2010, 350: 355–360

Introduction Guided by the requirements of “energy-saving, material-economizing and pollution free” for green materials, people are seeking for new type anode which has long service life, high performance of electrocatalysis and free of secondary pollution[1,2].
It also studies the performance of modified Ti-based lead dioxide electrode with MB solution as process object. 1 Experimental 1.1 Experimental chemicals The chemicals and materials needed for the experiment are listed in Table 1.
Environmental Science and Technology. 2007, 30(9): 28-38
Chinese Journal of Environmental Engineering. 2008, 2(7): 959-963
Chinese Journal of Catalysis. 2007, 28(7):646-650

But in cast and 2024 alloy, there is a change in rsistivity and Vickers hardness number related to aging time; due to the formation of point defects (vacancies) upon deforming these materials.
Badawi, Wakailak Journal of Materials Science and Engineering, 5 (2011) 400
Badawi, Journal of Materials Science and Engineering A, 1 (2011) 415
Lotfy, Journal of Materials Science and Engineering A, 1 (2011) 711
Kamel, Journal of Applied Polymer Science, 125[5], (2012) 3682

Nie, et al., CuO nanostructures: Synthesis, characterization, growth mechanisms, fundamental properties, and applications, Progress in Materials Science, vol. 60, pp. 208-337, 2014
Kalantar-zadeh, Nanostructured copper oxide semiconductors: a perspective on materials, synthesis methods and applications, Journal of Materials Chemistry C, vol. 2, p. 5247, 2014
Gao, Copper oxide and ordered mesoporous carbon composite with high performance using as anode material for lithium-ion battery, Microporous and Mesoporous Materials, vol. 143, pp. 230-235, 2011
Materials Science and Engineering C, 44: 278-284, 2014
Sathyamoorthy, Flower-shaped CuO Nanostructures: Synthesis, Characterization and Anti-microbial Activity, Journal of Materials Science Technology, 29(10): 909-914, 2013

Numerical simulations of the 3ω method based on the FEM take into account the exact geometry of the heater, the materials underneath the heater and the exact physical properties of these different materials.
Stieglitz, Polymers for Neural Implants, Journal of Polymer Science: Part B: Polymer Physics, Vol. 49, pp. 18-33, 2011
Mania, Application of DLC layers in 3-omega thermal conductivity method, Journal of Achievements in Material and Manufacturing Engineering, Vol. 37, pp. 512-517, 2009
Kline, Thermal conductivity studies of polymers, Journal of Polymer Science, Vol. 50, pp. 441-450, 1961
Nuzzo, Fabrication of stable metallic embedded in Poly(dimethylsiloxane) and model applications in non-planar electronic and lab-on-a-chip device patterning, Advanced Functional Materials, Vol. 15, pp. 557-566, 2005