1、Designation:E122513Standard Test Method forThermal Conductivity of Solids Using the Guarded-Comparative-Longitudinal Heat Flow Technique1This standard is issued under the fixed designation E1225;the number immediately following the designation indicates the year oforiginal adoption or,in the case of
2、 revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This test method
3、 describes a steady state technique forthe determination of the thermal conductivity,ofhomogeneous-opaque solids(see Notes 1 and 2).This testmethod is applicable to materials with effective thermal con-ductivities in the range 0.2 200022 to 55 to 8See Table 4.Austenitic StainlessD200 to 12005%See Ta
4、ble 5.CopperE85 to 1250 300 K=3.65367 6.64042 10-4T 218.937T1+116163 T2Fused SilicaL,M13008Up to 900 KM=(84.7 T)+1.484+4.94 104T+9.6 1013T4PyrexN,K,O,P,Q90 to 600140 to 470 200 K=1.1036+1.659 x 10-3(T-273.15)3.982x 10-6(T-273.15)2+6.746 x 10-9(T-273.15)3K310 Stainless SteelK,R300 to 10204=12.338+1.7
5、81 x 10-2(T-273.15)430 Stainless SteelK,R300 to 7704=20.159+1.589 x 10-2(T-273.15)-1.283 x10-5(T-273.15)2Inconel 600S,K,R300 to 10204=12.479+1.648 x 10-2(T-273.15)+3.741x 10-6(T-273.15)2Nimonic 75T,K,R300 to 10204=11.958+1.657 x 10-2(T-273.15)+3.252x 10-6(T-273.15)2ASRM 8420 is available from Nation
6、al Institute of Standards and Technology(NIST),Gaithersburg,MD.UBHurst,J.G.,and Lankford,A.B.,“Report of Investigation,Research Materials 8420 and 8421,Electrolytic Iron,Thermal Conductivity and Electrical Resistivity as aFunction of Temperature from 2 to 1000K,”National Institutes of Standards and
7、Technology(nee National Bureau of Standards),Gaithersburg,MD,1984.CHurst,J.G.,and Giarratano,P.J.,Certificate,Standard Reference Material 730,Thermal Conductivity Tungsten,National Institutes of Standards and Technology(neeNational Bureau of Standards),Gaithersburg,MD,1976.DHurst,J.G.,Sparks,L.L.,an
8、d Giaarratano,P.J.,Certificate,Standard Reference Material 735,Thermal Conductivity Austenitic Stainless Steel,National Institutesof Standards and technology(nee National Bureau of Standards),Gaithersburg,MD,USA,1975.EMoore,J.P.,Graves,R.S.,and McElroy,D.L.,“Thermal Conductivity and Electrical Resis
9、tivity of High-Purity Copper from 78 to 400 K,”Canadian Journal of Physics,Vol 45,1967,pp.38493865.FPyroceram is a trademark by Corning Incorporated,Corning,NY.GSalmon,D.R.,Roebben,G.,and Brandt,R.,“Certification of Thermal Conductivity and Thermal Diffusivity up to 1025 K of Glass-Ceramic Reference
10、 Material BCR-720,”EUR Report 21764,Institute for Reference Materials and Measurements(IRMM),Geel,Belgium,2007.HStroe,D.E.,Thermitus,M.A.,and Jacobs Fedore,R.A.,“Thermophysical Properties of Pyroceram 9606,”Thermal Conductivity 27/Thermal Expansion 15,H.Wang,W.Porter,eds.,DEStech Publications,Lancas
11、ter,PA,2005,pp.382390.IBCR-2013 is available from the Institute for Reference Materials and Measurements(IRMM),Geel,Belgium.UJBCR-724 is available from the Laboratory of the Government Chemists(LGC),Teddington,Middlesex,UK.UKTye,R.P.,and Salmon,D.R.,“Development of New Thermal Conductivity Reference
12、 Materials:A Summary of Recent Contributions by National Physical Laboratory,”Thermal Conductivity 27/Thermal Expansion 15,H.Wang(ed.),DEStech Publications,Lancaster PA,2005,pp.372381.LAbove 700 K a large fraction of heat conduction in fused silica will be by radiation and the actual effective value
13、s may depend on the emittances of bounding surfacesand meter bar size.MRecommended values from Table 3017A-R-2 of the Thermophysical Properties Research Center Data Book,Vol.3,“Nonmetallic Elements,Compounds,and Mixtures,”Purdue University,Lafayette,Indiana.NPyrex is a trademark by Corning Incorpora
14、ted,Corning,NY.OTye,R.P.,and Salmon,D.R.,“Thermal Conductivity Certified Reference Materials:Pyrex 7740 and Polymethylmethacrylate,”Thermal Conductivity 26/ThermalExpansion 14,R.Dinwiddie,ed.,DEStech Publications,Lancaster,PA,2005,pp.437451.PBCR-39 is available from the Institute for Reference Mater
15、ials and Measurements(IRMM),Geel,Belgium.UQSalmon,D.,“Thermal Conductivity of Insulations Using Guarded Hot Plates,including Recent Developments and Sources of Reference Materials,”MeasurementScience and Technology,Vol 12,2001,pp.R89R98.RClark,J.,and Tye,R.,“Thermophysical Properties Reference Data
16、for Some Key Engineering Alloy,”High Temperatures High Pressures,Vols 35/36,2003/2004,pp.114.SInconel is a trademark by Special Metals Corporation,Huntington WV.TNimonic is a trademark by Special Metals Corporation,Huntington WV.UThis is the sole source of supply of this material known to the committee at this time.If you are aware of alternative suppliers,please provide this information to ASTMInternational Headquarters.Your comments will receive careful consideration at a meeting of the respon
