1、Designation:E195211Standard Test Method forThermal Conductivity and Thermal Diffusivity by ModulatedTemperature Differential Scanning Calorimetry1This standard is issued under the fixed designation E1952;the number immediately following the designation indicates the year oforiginal adoption or,in th
2、e case of 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.1.Scope1.1 This test method describes the determination of thermalconductivity of homogeneous,non-porou
3、s solid materials inthe range of 0.10 to 1.0 W/(K m)by modulated temperaturedifferential scanning calorimeter.This range includes manypolymeric,glass,and ceramic materials.Thermal diffusivity,which is related to thermal conductivity through specific heatcapacity and density,may also be derived.Therm
4、al conductiv-ity and diffusivity can be determined at one or more tempera-tures over the range of 0 to 90 C.1.2 SI units are the standard.The values given in parenthe-ses are provided for information purposes only.1.3 This standard does not purport to address all of thesafety concerns,if any,associa
5、ted with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2E473 Terminology Relating to Thermal Analysis and Rhe-ologyE96
6、7 Test Method for Temperature Calibration of Differen-tial Scanning Calorimeters and Differential Thermal Ana-lyzersE968 Practice for Heat Flow Calibration of DifferentialScanning CalorimetersE1142 Terminology Relating to Thermophysical PropertiesE1231 Practice for Calculation of Hazard Potential Fi
7、gures-of-Merit for Thermally Unstable MaterialsE2161 Terminology Relating to Performance Validation inThermal Analysis3.Terminology3.1 Definitions:3.1.1 Specific technical terms used in this document aredefined in Terminologies E473,E1142,E2161 including cali-bration,differential scanning calorimetr
8、y,heat capacity,modu-lated temperature,precision,reference material,relative stan-dard deviation,repeatability,reproducibility,specific heatcapacity,standard deviation,thermal analysis,thermal con-ductance,and thermal conductivity.3.2 Definitions of Terms Specific to This Standard:3.2.1 modulatedtem
9、peraturedifferentialscanningcalorimetera version of differential scanning calorimetry thatprovides a sinusoidally varying temperature program to the testspecimen in addition to the traditional isothermal or tempera-ture ramp programs.Results from analysis shall includeapparent and specific heat capa
10、city.4.Summary of Test Method4.1 The heat capacity of a test specimen may be determinedusing the modulated temperature approach in which an oscil-latory or periodically repeating temperature program(aroundan average temperature)is imposed upon a test specimenproducing an oscillatory(periodic)heat fl
11、ow into or out of thespecimen.The heat capacity of the test specimen may beobtained from the amplitude of the resultant heat flow dividedby the amplitude of the oscillatory(periodic)temperature thatproduces it.Specific heat capacity is obtained by normalizingthe heat capacity to specimen mass.4.1.1
12、The accuracy of the heat capacity thus obtaineddepends upon experimental conditions.When a thin testspecimen encapsulated in a specimen pan of high thermalconductivity is treated with temperature oscillations of longperiod(low frequency),the test specimen is assumed toachieve a uniform temperature d
13、istribution and the resultant1This test method is under the jurisdiction of Committee E37 on ThermalMeasurements and is the direct responsibility of Subcommittee E37.10 on Funda-mental,Statistical and Mechanical Properties.Current edition approved Aug.1,2011.Published September 2011.Originallyapprov
14、ed in 1998.Last previous edition approved in 2006 as E1952 11.DOI:10.1520/E1952-11.The process described in this test method is covered by a patent(Marcus,S.M.and Reading,M.,U.S.Patent 5 335 993,1994)held by TA Instruments,Inc.,159Lukens Drive,New Castle DE 19720.Interested parties are invited to su
15、bmitinformation regarding the identification of acceptable alternatives to this patentedmethod to the Committee on Standards,ASTM Headquarters,100 Barr HarborDrive,West Conshohocken PA 19428-2959.Your comments will receive carefulconsiderations at a meeting of the responsible technical committee whi
16、ch you mayattend.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 heat capacity information will be comparable with those ofother non-oscillatory test methods.4.1.2 When one end of a thick test specimen is
