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Introduction Materials are the material base of social development.
Material science has been most countries’ high-tech frontier and one of those which enjoy the priority in development, especially the fields of intelligent materials.
As one of intelligent materials, piezoelectric materials have got much attention from governments and researchers [1].
However, with the rapid development of science and technology, requirements on the performance of piezoelectric materials are more and more demanding.
Xu: Journal of Functional Materials, Vol. 27 (1996), pp.103-109.

Therefore the materials around the tunnel such as soil, rocks and building materials mostly are complicated porous medium.
The chemical combination which is presented in the materials in molecular crystal type is strong.
American Society of Agronomy and Soil Science Society of American. 1972, 220
Journal of Water Resource & Water Engineering. 2006, Vol.6, pp:24-26
Study on Characteristics of Coupled Heat and Moisture in Porous Building Materials[D].

Combined with these problems and according to the previous experimental basis, this study aims to further improve the carbonation efficiency and mechanical properties of building materials.
In this paper, it studied the influence of carbonization pressure in the preparation of steel slag bricks as building materials by CO2 mineral carbonation.
Experiments Raw materials The chemical compositions and specific area of steel slag are summarized in Table 1.
References [1] Yong Sun, Vinay Parikh, Lian Zhang: submitted to Journal of Hazardous Materials (2012) [2] Myung yu Lee, Young Nam Jang, Kyung won Ryu, Wonbeak Kim: submitted to Energy (2012) [3] Rafael M.
Santos, Davy François: submitted to Applied Thermal Engineering (2013) [4] Goldberg P, Chen Z, O’Connor W, Walters R. : submitted to department of energy, US (1998) [5] BertosMF, Simons S J, HillsCD: submitted to Journal of Hazardous Materials (2004)

In order to meet the need of the industrial use, loose, large volume and low energy density biomass materials must be pressed pellet or briquettes to change its shape ,energy characteristics,and combustion efficiency.
The raw materials from the national reserve in the storehouse for wheat, corn, rice are rotten rice .But after a few years, after finishing digest of rice, the number of the country's "effective grain reserves" is on surface.
In the new biological energy technology haven't realized industrialization, grain as raw materials of biological energy will still be the focus of future development.
International biological energy research development status quo and tendency[J].China engineering science.2011:96-112
The modern agricultural science and technology, 2008, (8): 200-201

Ho: Journal of Electronic Materials Vol. 26 (1997), p. 805 [2] M.
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Experimental 2.1 Materials The main characteristics of WC, Cr3C2, VC and Co starting powders were listed table1.
(2) With the inhibitors content of 0.4 wt.% VC-0.4 wt.% NbC, the best overall performance that hardness was 2000HV30 and transverse rupture strength was 2164Mpa was abtained,which provided with an obvious improvement and was worthy of further study. 5 Acknowledgements The authors are grateful to Chongqing Academy of Science &Technology for supplying of materials and testing of samples .the research work in this paper was Supported by Natural Science Foundation Project of CQ CSTC(NO.CSTC2012jjA50030), Chongqing science and technology key Projects Fund (No.
Journal of Refractory Metals and Hard Materials, 2011; 29:147-152 [5] Borgh Ida , Hedström Peter, Borgenstam Annika, Agren John, Odqvist Joakim.
International Journal of Refractory Metals and Hard Materials, 2014; 42: 30-35 [6] Morton C.W, Wills D.J, and Stjernberg K.
International Journal of Refractory Metals & Hard Materials 1999; 17: 91-97 [10] S.G.Huang,R.L.

Introduction Steel fibers-reinforced concrete is the most common materials used for defence construction today [1-12].
However, as the development of the penetrating weapons [13], this material can not provide enough protection anymore.
It is in urgent need of developing a new construction material for defence engineering.
Materials.
Journal of Ballistics, Vol.18 (2006), p.64 [9] Long Yuan, Ji Chong, Wan Wenqian.

Powders of analytical reagent grade, comprising BaCO3 (P 99.5%), Na2CO3 (P 99.5%), Nb2O5 (P 99.5%), and SiO2 (P 99.5%), were used as the starting materials.
Journal of Materials Processing Technology, 2001, 113(1-3): 202–208
Materials Science and Engineering: B, 2004, 110(3): 233–239
Glass-ceramic for low temperature co-fired dielectric ceramic materials based on La2O3–B2O3–TiO2 glass with BNT ceramics[J].
Materials Letters, 2005, 59(22): 2821–2826

Introduction The composite materials mean the material designed to display more excellent properties than each material by combining more than two kinds of the material.
Materials and Specimens Preparation of the Experiment Materials.
A variety of the material has been used in many types in the forming of the composite materials.
Yoon, Advanced Materials Research, 97-101 (2010) 1772-1775
Gunnink, Materials & Design, 7-6 (1986) 287-300

Numerical Simulation The parameters of elastic material are selected as Ref. [5].
Composites Science and Technology, 22:3 (1985), 167-184
Journal of Zhejiang University: SCIENCE, 6A:2(2005),126-131.
Journal of Zhejiang University, 40:3 (2006), 511-514.
Journal of Mechanics of Materials and Structures, 4:10(2009), 1741-1754