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The Research on the Piezoelectric and Dielectric Properties of Bi0.5(Nak)0.5-BaTiO3 Lead-free Ceramics Jian-yong GUO1,2,a, Tao-sheng ZHOU2,b and Ji-hong LIAO3,c,* 1School of Electronic and Electrical Engineering, Wuhan Textile University, Wuhan 430074, China 2Faculty of Materials Science and Engineering, Hubei University, Wuhan 430062, China 3 College of physics and Electronic Engineering, Hubei University of arts and science, Xiangyang 441053, China atony70@163.com, btszhou@hubu.edu.cn, cguofengyujian@163.com *Corresponding author Keywords: BNK-BT, lead-free, piezoelectric, dielectric.
Materials.
Bismuth oxide (Bi2O3, ≥99.99%), Sodium carbonate (Na2CO3, ≥99.0%), Potassium carbonate (K2CO3, ≥99.0%), Titanium dioxide (TiO2, ≥99.0%), Barium carbonate (BaCO3, ≥99.0%) were used as raw materials.
Sample numbers x/y 0.06 0.10 0.15 0.20 0.20 a1 b1 c1 d1 The starting materials were ball-milled for 2 h in ethanol.
[10] Ali Hussain, Arif Zaman, Yaseen Iqbal, Myong Ho Kim, Journal of Alloys and Compounds, Vol. 574 (2013) 320–324

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The Study of type twin annealing in high Mn steel Gholam Reza Razavi1, a 1Department of Materials Science and Engineering, Najafabad Branch, Islamic Azad University, Isfahan, Iran.
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The physical flame retardant method is to add noncombustible agents to the wood-based panel, to reduce the proportion of combustible materials, and to separate the combustible materials from the oxidant and heat source.
According to the value of limiting oxygen index, the combustible performance of materials can be divided into three groups: (1)OI<21 belongs to flammable materials; (2)OI=21～28 belongs to slow combustible materials; (3)OI>28 belongs to self extinguishing materials [9].
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Drastic difference could be found in the two materials.
The hardness values of 350 Hv and desired properties suggest that BMG is an interest class of materials in which theoretical strengths of materials are being challenged.
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In the determination of plane strain fracture toughness test [9], CT specimen is recommended by ASTM E1547, especially used for assessment and research of the nuclear pressure vessel materials.
Fig.2 The relationship between C*and A Fig.3 Solution on * by RSM Projects of solution to creep fracture mechanics parameter C* based on RSM Four ideal elastic-power creep rate materials with different creep coefficient and creep exponent shown as Table 1 are used to research RSM for solving the creep fracture mechanics parameters C*.The data of material 1 and material 2 in Table 1 are derived from 1Cr0.5Mo and 1.25Cr0.5Mo respectively when they are at 538 degrees, and the other two materials are hypothetical.
Tab.1 Mechanical property utilized in C* calculation MATERIAL Material1 175 9.03 0.3 Material 2 175 9.36 0.3 Material 3 175 9.03 0.3 Material 4 175 9.03 0.3 Using finite element analysis software - ABAQUS, the element type selects eight node quadratic reduced integration element (CPE8R), and width is 24mm, and meshing is shown in Fig. 4.
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Effect of Current on the Interfacial Structures of the Dissimilar Metals Diffusion Bonding Lifang Hu a, Fuming Wang , Shaoping Chen and Qingsen Mengb* Department of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan Shanxi 030024, China ahulifang0727@163.com, b*mengqingsen@263.com(*corresponding author) Keywords: AZ31B; aluminum; copper; diffusion bonding; electric field; diffusion Abstract.
Introduction Magnesium and its alloys have a high strength/weight ratio, and are promising alternatives to other structural metallic materials in the automotive industry.
Experimental Experimental materials.
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Acknowledgement This work was financially supported by the National Natural Science Foundation (50678173).
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Acknowledgements This work is supported by the National Natural Science Foundation of China (Grant No. 50779010, 50579080), National Natural Science Foundation Key Project (Grant No. 50539010).
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