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A large number of research efforts have been devoted to the effect of strain rate on material properties.
Acknowledgements The authors would like to acknowledge the support provided by National Natural Science Foundation of China Under Grant No. 90815026 and Foundation of Ministry of Education of China for Innovation Group Under Grant No.
Li:China Civil Engineering Journal, Vol.43(4)(2010) p.70.
(in Chinese) [2] M Shrikrishna，Kulkarni, P Surendra, et al:ACI structural Journal .Vol.95(1998)：P.705
[3] J Lee, G L Fenves: Journal of Engineering Mechanics, Vol.124(1998): p.892

Introduction Soft magnetic composite materials are the subject of study for several years.
Beside its interesting characteristics this type of composite materials it is also attractive due to the low costs of the starting raw materials such as iron and hematite [10, 11].
Hashemi, Magnetic losses of the soft magnetic composites consisting of iron and Ni–Zn ferrite, Journal of Magnetism and Magnetic Materials, 320 (2008) 1544-1548 [4] T.F.
Graham, Introduction to Magnetic Materials, 2nd ed., IEEE Press & Wiley, New Jersey, (2009)
Massalski, 1990, ASM International, Materials Park, Ohio, USA.

Establishment and application of weights and association based on coal and gas outburst controlled assessment: Journal of China coal society, vol.30 (2005) no.1, p.58-62
The gray prediction of mine gas emission quantity: Journal of China coal society, vol.33 (2002) no. 4, p.32-33
Beijing: Science press, 2008 (in Chinese)
Wuhan: East China University of science and technology Press, 1999 (in Chinese)
Multivariable grey model and its application to predicting gas flow from boreholes: China safety science journal, vol.16 (2006) no.6, 50-54.

Joao: Journal of Magnetism and Magnetic Materials, 323 (2011) 2335-2339
Knight: Journal of Magnetism and Magnetic Materials, 382 (2015)124-133
Huh: Journal of Magnetism and Magnetic Materials, 354(2014) 324-332
Vaseghi: Journal of Magnetism and Magnetic Materials, 365 (2014) 14-22
Melzer: Journal of Magnetism and Magnetic Materials, Journal of Magnetism and Magnetic Materials, 368 (2014) 342-352

Materials Science and Engineering A, 196(2002)329–331
Journal of Metastable and Nanocrystalline Materials 15(2003)366
Metallurgical and Materials Transactions A Physical Metallurgy and Materials Science, 32(2001)843
Advanced Engineering Materials, 9(2007)667
On the Preparation of Bio- Nano- and Structural Ceramics and Composites by Spark Plasma Sintering, Journal of Solid-State Science,5(1) (2003)125-131

,Xu,L.Y., Effect of graphene nano sheets reinforcement on the performance of Sn–Ag–Culead- free solder, Materials Science & Engineering A 562 (2013) 25–32
Springer Science + Business Media [4] Nai, S.M.L, Wei, J. & Gupta, M., Lead-free Solder Reinforced with Multiwalled Carbon Nanotubes, Journal of Electronic Materials.Vol.35(7) (2006) 1518-1522
Springer Science + Business Media [7] Han, Y.D.
[8] Wu, C.M.L., Properties of Lead Free Solder Alloys with Rare Earth Element Additions, Materials Science and Engineering R 44 (2004) 1-44
Effects of Ni-coated Carbon Nanotubes addition on the electromigration of Sn-Ag-Cu solder joints.Journal of Alloys and Compounds 581 (2013) 202-205.

Joseph, Development and characterization of liquid carbon fibre reinforced aluminium matrix composite, Journal of Materials Processing Technology. 209 (2009) 4809–4813
Manisekar, Synthesis of porous SiC preform and squeeze infiltration processing of Aluminium-SiC Metal ceramic composites, Materials Science Forum. 710 (2012) pp 371-376
Vikhrov, Squeeze casting: an overview, Journal of Materials Processing Technology. 101 (2000) 1-9
Ahmad, Fabrication of fiber reinforced metal matrix composites by squeeze casting technology, Journal of Materials Processing Technology.178 (2006) 34–38
Materials Letters 29 (1996) 209-213.

Waterborne epoxy resin is a thermosetting polymer material used to modified cement materials[4], and is different with the traditional organic material, owing wonderful elasticity and plasticity[5,6].
Materials and experimental methods Ordinary class G oil-well cement was used in the present study.
Li, Investigation of the properties of high-porosity cement foams containing epoxy resin, Construction and Building Materials. 154 (2017) 115–122
Papastergiadis, Fundamental properties of epoxy resin-modified cement grouts, Construction and Building Materials. 125 (2016) 184–195
Pinto, F.C. da Rocha, Synthesis and characterization of epoxy-modified cement slurries-Kinetic data at hardened slurries/HCl interfaces, Journal of Colloid and Interface Science. 327 (2008) 267–274

Non-Ohmic Behavior of Some ZnO Ceramic Defective Ions with Different Valences M.El-Hofy Physics department, Faculty of Science, Menoufia University, Shebin El-Koom, Egypt elhofy2000@yahoo.com Keywords: Cu 2+-Doped, Fe 3+-Doped, Linear Scan, Microstructure, Mo 6+-Doped, Non-Ohmic Behavior, Ti 4+-Doped, V 5+-Doped, X-Ray Diffraction, ZnO Ceramic Abstract ZnO ceramic samples with the chemical formula, 97ZnO-2BaO-1(X)Mol% (where X= CuO, Fe2O3, TiO2, V2O5, MoO3) have been prepared by using conventional ceramics techniques.
ZnO is known to be one of the best base materials for manufacturing varistors.
The raw materials were mixed in acetone for 30min, and dried at 85°C for 24h.
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and Materials Sensors and Actuators (International Academic Publishers, China Xi'an 1995) [12] M.El-Hofy: Defect and Diffusion Forum, 2005, 242-244, 107 [13] M.El-Hofy: Defect and Diffusion Forum, 2006, 251-252, 13 [14] L.F.Grigoreva, S.A.Petrov, O.Yu.Sinelshehikova, I.A.Drozdova and V.V.Gusarov: Glass Physics and Chemistry, 2007, 33[1], 72 [15] W.Onreabroy, N.Sirikulrat, A.P.Brown, C.Hammond, S.J.Milne: Solid State Ionics, 2005, 177[3-4], 411 [16] Shenglin, Jaing, Haibo Zhang, Yanqiu Huang, Meidong Liu, Ruzhan Lin: Materials Science and Engineering, 2005, B117, 317

Introduction Since the mid-1960s, rare earth complexes have been found to be useful as good luminescent materials [1].
The research of rare earth luminescent materials mainly focuses on inorganic luminescent materials, such as rare earth ions and transition metal ions doped with various metal oxides, composite oxides etc. [4].
This type of organic rare earth luminescent materials therefore has become a hot topic in recent years.
The materials in white-powder form are obtained by purifying with ethanol and acetone.
Journal of Inner Mongolia Agricultural University (Natural Science Edition). 39 (2018) 84-89