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Compared with LGS, LGN and LGT, Sr3NbGa3Si2O14 (SNGS) and Sr3TaGa3Si2O14 (STGS), Ca3NbGa3Si2O14(CNGS) and Ca3TaGa3Si2O14(CTGS) only contain about half of the Ga element, which reduce the cost of raw materials.
When these materials are used in the application of SAW device, the substrate of these devices require high k2, low temperature coefficient of frequency(TCF), zero power flow angle(PFA), etc.
So these new materials are more attractive when we want to reduce the insertion loss of SAW devices in application.
Journal of Sythetic Crystals. 39(2010)291-297
[6] D.Puccio, D.C.Malocha, M..M.Chou, et al, SAW Parameters on Y-cut Langasite Structured Materials, IEEE Ultrasonics.Symposium, 2007: 1837-1881

Recovery of waste PCBs is an important subject not only from the point of waste treatment but also from the recovery of valuable materials.
Recently, we apply this microorganism leaching approach to the extraction of electronic waste material and got very good results.
Material and methods The elements in PCB scraps used in this study are Cu:25.06; Fe: 0.66; Pb: 0.80; Zn: 0.04; Ni: 0.0024.
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Introduction Development of materials industry is inseparable from mineral resources (including fossil fuels) support.
The materials and energy consumption of 1kg the crude steel production in EAF process is listed in table 8.
Wang, Study on equivalent of non-renewable resources depletion for building materials life-cycle-assessment, China building materials science and technology, 4(2009)1-5
Exergy, an International Journal, 4(2001) 234-255
Fan, The characterization factors of abiotic resource depletion and its changes with time in LCA, Journal of Fudan University(Natural Science), 51(2012) 125-130

Bae,” Finite element analysis on the effect of die clearance on shear planes in fine blanking” Journal of Materials Processing Technology 130–131 (2002) 462–468 [3] X.
Hoffmann , ”FEM simulation and experimental research on the AlMg4.5Mn0.4 sheet blanking” Journal of Materials Processing Technology 122(2002) 338-343 [4] N.
Takakura, “Finite element simulation of the shearing mechanism in the blanking of sheet metal” Journal of Materials Processing Technology 139 (2003) 64–70 [5] H.
Rachik , “Rate-dependent constitutive model for sheet metal blanking investigation” Materials Science and Engineering A 487 (2008)162–170 [6] S.
Murakawa,” An investigation of material flow analysis in fine blanking process” Journal of Materials Processing Technology 192–193 (2007) 237–242 [7] V.

The properties of representative units of porous materials are discussed [3].
Honeycombs are usually used as core materials for sandwich structures due to their high strength-to-weight ratio [4-7].
Sadowski: Computational Materials Science, (2009) p. 45 [8] X.
Vandepitte: Journal Sandwich Structures﹠ Materials, 5, (2006), p.8 [9] M.
Turan: Journal of Composite Materials, 44, (2010), p.22 [10] Q.

Effect of Surface Modification on Slip Casting of SiC Slurry Caihua Zheng 1,a , Xiaoli Ji 2,b 1Mechanical and Electronic Engineering Department,Qing Quan Polytechnic, Qingyuan Guangdong 511510,China 2Key Laboratory for Silicate Materials Science and Engineering of Ministry Education,Wuhan University of Technology, Wuhan 430070, China azhengch1999@sohu.com, bjxl@whut.edu.cn Keywords: surface modification, SiC, rheology, slip casting Abstract.
Acknowledgement The authors are grateful for the financial support from the Science and Technology Project of Qing Quan Polytechnic.
Kovac,G.Drazic,et al,Surface Characterisation and Modification of Submicron and Nanosized Silicon Carbide Powders,Journal of the European Ceramic Society,Vol.27(2007),p. 3545–3550 [2] Wei Li,Ping Chen,Mingyuan Gu,Yanping Jin,Effect of TMAH on rheological behavior of SiC aqueous suspension,Journal of the European Ceramic Society,Vol.24(2004), p.3679–3684 [3] Qide Wu,Caihua Zheng,Xiaoli Ji,et al, Impacts of Defoaming Agents on a Modified SiC Slurry Slip Casting Process Performance,Journal of Wuhan University of Technology,Vol.30, No.2(2008),p.21-24 [4] Huagui Yang,Chunzhong Li,Hongchen Gu,and Tunan Fang.
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The flowing water scours base materials again in reverse in the process of being sucked into the void areas [8,9].
The pressure and flow velocity of flowing water are external factors of causing being scoured of base materials.
Scouring base materials make the size of void areas expansion.
Journal of Shanxi Datong University(Natural Science),2008,24(3)：53-55
Journal of Chongqing Jiaotong University (Natural Science),2007,26(5):61-63.

The material formed lobes are mainly come from the upper limited channels and deposit in the restrictive environment.
Geological Journal of China universities, 2006. 12(1):147-152
Earth science reviews, 2002, 58:311-341
Kolla: Journal of Sedimentary Research, 2003.73, 367-388
Paul : Earth science-journal of China university of geosciences. 33(6): 825-833.

The deficiency of bond capacity of traditional cement mortar was exposed as the new wall materials were used widely.
It produced the adverse effects on construction quality and applications of new wall materials.
Raw Materials.
Therefore, the polymer using in the test could greatly amend the bond behavior between mortars and new wall materials.
Conclusions Compared with traditional wall materials(such as clay brick), the bond strength between new wall materials and mortars were obviously lower.