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Computational Materials Science.
Applied Mechanics and Materials.
Journal of Materials Processing Technology.
Journal of Materials Processing Technology.
Journal of Manufacturing Science and Engineering, Transactions of the ASME., Vol.124 (2002),p. 528-535.

Many papers have reported on the synthesis, characterization, stability, and application of these materials [1, 2].
Mesoporous sorbents are used in various fields of chemical researches as chromatographic material [3], gas sensing [4] and catalytically active materials [5].
Such material possesses enhanced gas sensitivity and chromatographic materials [7, 8].
Bhat, Exploring the Potential of Mesoporous Silica, SBA-15, as an Adsorbent for Light Hydrocarbon Separation, Chemical Materials, 14 (2002) 304-309
Tsutsumi, Adsorption Characteristics of Organosilica Based Mesoporous Materials, Langmuir, 20 (2004) 7139-7145

Four kinds of organic materials are selected for different ratios.
Amani: Experimental Thermal & Fluid Science.
Harikrishnan: Materials Today.
Fang: International Journal of Refrigeration.
Yang: Solar Energy Materials & Solar Cells.

Experimental Materials.
Jiang, Effect of crystalline phase on the dielectric and energy storage properties of poly (vinylidene fluoride), Journal of Materials Science: Materials in Electronics 27 (2016) 7280-7286
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Ablatives are heat-shielding materials used to protect aerospace substructures.
Composite materials provide an unlimited range of properties which can be achieved by alternating its parameters like type of constituent materials , composition, void volume, orientation and distribution of reinforcement materials, ply angle in case of laminate composites) (2-4).
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Influence of Density on the Thermal Conductivity of Fiberglass Felt Yong Yang1,a,Xueyu Cheng2,b, Zhaofeng Chen1,c,Renli Fu1,d,Zhou Chen1,e, Jinglian Qiu1,f,Dan Su1,g 1College of Material Science and technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P.R.China 2Suzhou V.I.P.New Material Co., Ltd., Hong Da Fang Yuan Group, Suzhou 215000, P.R.China *Corresponding author.E-mail:zhaofeng_chen@163.com Keywords: Thermal conductivity, Density, Fiberglass felt, Heat-transfer mechanism.
Introduction Fiberglass felt are used widely as insulations and building sections in commercial and industrial applications[1].Coefficient of thermal conductivity for the Fiberglass felt is an important index,which could evaluate the thermal insulation performance of the fiberglass felt.In general,thermal insulations are classified into the following two types of materials:isotropic materials with a uniform thermal conductivity and anisotropic materials with a nonuniform thermal conductivity[2].Fiberglass felt are the isotropic materials.The thermal conductivity of the material is defined as the amount of heat crossing a unit area of the material per unit time per unit temperature gradient[3].In porous materials heat is propagated by three processes:thermal conductance through the solid and both radiation and convection through the pores[3].
In this paper,using this heat-transfer mechanism of the porous materials explains the relationship between thermal conductivity and density of the fiberglass felt.
Generally speaking,thermal properties of a fibrous material depend on:thermal properties of each phase(fiber and air),fiber volume fraction,and fiber size, orientation and mass distribution[4].The value of the thermal conductivity of heat-insulating materials,among which are fibrous materials,is affected by their density and kind,the size and location of pores,the chemical composition and molecular structure of hard constituents,the emissivity of surfaces bounding the pores,and the kind and pressure of the gas filling the pores[5].Main aim of this paper is to describe the relationship between thermal conductivity and density.According to the aim,we study the effect of density of fiberglass felt and analysis the reason.
References [1] N.E.WIJEYSUNDERA and M.N.A.HAWLADER: Effects of condensation and liquid transport on the thermal performance of fibrous insulations, Heal Mass Transfer.Vol.35,No.l0, pp.2605-2616,1992 [2]T.Ohmura1,2, M.Tsuboi1 and T.Tomimura3:Estimation of the Mean Thermal Conductivity of Anisotropic Materials.International Journal of Thermophysics, Vol.23,No.3,May 2002(©2002) [3] ARTHURL.LOEB: Thermal Conductivity: VIII, A Theory of Thermal Conductivity of Porous Materials, Journal of the American Ceramic Society-Loeb, Vol.37, No.2.p.96 [4] Moran Wang, Jihuan He, Jianyong Yu, Ning Pan: Lattice Boltzmann modeling of the effective thermal conductivity for fibrous materials, International Journal of Thermal Sciences 46(2007)848–855 [5] M.G.Kaganer, Heat Insulation in Low-Temperature Technology [in Russian], Mashinostroenie, Moscow(1966)

Since, in laminated composites two dissimilar materials are bonded together, the laminates may tend to de-bond.
Further, the difference in thermal coefficients of the constituent materials may result in residual stresses.
The concept of FGM was proposed in 1984 by materials scientists as a means of preparing thermal barrier materials.
Pan, Exact solution for functionally graded anisotropic elastic composite laminates, Journal of Composite Materials 37 (2003) 1903–20
Soave, Refined and advanced models for multilayered plates and shells embedding functionally graded material layers, Mechanics of Advanced Materials and Structures 19 (2010) 604–622 [9] B.

Materials Letters, 2002, 57:173-177
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