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Experiment Preparation of polycrystalline material The purity of raw materials: 99.999% (5N) for BaF2, YF3, TmF3, and HoF3.The concentration of TmF3 and HoF3 are 5at.% and 0.5 at.%, respectively.
The raw materials were weighed according to BaF2: YF3 = 1:2 (Molar ratio) with electronic balance.
The temperature was keeped for 2h, then remove the water and oxygen, stay the furnace cooling to room temperature, lots of high purity nitrogen were pumped in subsequently, finally anhydrous fluoride raw materials were gained.
Journal of Rare Earths.2011,29(6):592-595 [5] Zhang shougui, Yao yongfeng, Li wenrun.
Journal of Synthetic Crystals,2003,32(6):640-643

The continuous network structure composed of silica aerogels of high purity are non-crystallized, porous, surface areas from 800 to 980 m2/g and light weight nano-materials.
However, some used raw materials in the experiment have damage in environment [5].
They are non-crystallized, porous and light nanometer materials.
Xu,Journal of University of Science and Technology Beijing Vol.15(52008), p.649
Gauthier: Journal of Non-Crystalline Solids Vol.3(2004), p.238

Table 1 Analysis model size and properties of the SOFC stack materials.
In SOFC, the cell components deformations are different due to the CTE mismatches between the cell materials.
This might be affected by mismatch between electrode materials at the PEN structure of SOFC.
Deevi : A review on the status of anode materials for solid oxide fuel cells, Materials Science & Engineering, A, Vol. 362, pp. 228-239. (2003) [2] Oingping Fang, Ludger Blum, Roland Peters, Murat Peksen, Peter Batfalsky, Detlef Stolten : SOFC stack performance under high fuel utilization, International journal of Hydrogen Energy, Vol. 40, pp.1128-1136. (2015) [3] Amar N.Kumar and Bent F.
Sorensen : Fracture energy and crack growth in surface treated Yttria stabilized Zirconia for SOFC applications, Materials Science & Engineering, A,Vol.333, pp. 380-389. (2002)

The diameter of specimen is 2b, the tip radius of notch is ρ, depth of notch t, open angle of notch α.The material of test specimen is 45 medium carbon steel, it’s σb=734Mpa, σs=468Mpa, and it is thermal refined.
Acknowledgment：The work is supported by Funds of Ministry of Education, China (208152) References [1] Y.Q.Sun: Machinery Design & Manufacture Vol.15 No.8 (2006), p.39 [2] C.Su: Journal of Machine Design and Research Vol.14 No.1 (1997), p.35 [3] X.
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It can be obtained the material constants from the notch low cycle fatigue data in Table1 and Table 2.
Acknowledgements The work was supported by the National Natural Science Foundation of China (no.50875080).
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Common city design still continue direct apply material, modeling and local vegetation in present city.
Only when it merge with technique, material, new idea and local culture can it create new culture and mix technique[8].
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Owing to the fine corrosion resistance and low price, titanium is the most frequently-used electrode material [3].
Experiment Material and Reagent.
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The material attribute and element coordinate systems also have some special requirements.
Acknowledgments The work described in this paper was fully supported by Science and Technology Projects of MOHURD (No: 2011-K2-23), Science and Technology Research Projects of Hubei Provincial Department of Education (No: Q20111314).
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Tan, Journal of China & Foreign Highway (2012), in press
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