DIN EN ISO 22007-6-2015 Plastics - Determination of thermal conductivity and thermal diffusivity - Part 6 Comparative method for low thermal conductivities using a temperature-modu.pdf

1、May 2015 Translation by DIN-Sprachendienst.English price group 11No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 83

2、.080.01!%Bj3“2317116www.din.deDDIN EN ISO 22007-6Plastics Determination of thermal conductivity and thermal diffusivity Part 6: Comparative method for low thermal conductivities using atemperature-modulation technique (ISO 22007-6:2014);English version EN ISO 22007-6:2015,English translation of DIN

3、EN ISO 22007-6:2015-05Kunststoffe Bestimmung der Wrmeleitfhigkeit und der Temperaturleitfhigkeit Teil 6: Vergleichsmethoden fr geringe Wrmeleitfhigkeit unter Anwendung einerTemperaturanpassungsmethode (ISO 22007-6:2014);Englische Fassung EN ISO 22007-6:2015,Englische bersetzung von DIN EN ISO 22007-

4、6:2015-05Plastiques Dtermination de la conductivit thermique et de la diffusivit thermique Partie 6: Mthode comparative pour faibles conductivits thermiques utilisant unetechnique de modulation de la temprature (ISO 22007-6:2014);Version anglaise EN ISO 22007-6:2015,Traduction anglaise de DIN EN ISO

5、 22007-6:2015-05www.beuth.deDocument comprises 20 pagesIn case of doubt, the German-language original shall be considered authoritative.05.15 DIN EN ISO 22007-6:2015-05 2 A comma is used as the decimal marker. National foreword This document (EN ISO 22007-6:2015) has been prepared by Technical Commi

6、ttee ISO/TC 61 “Plastics” (Secretariat: SAC, China) in collaboration with Technical Committee CEN/TC 249 “Plastics” (Secretariat: NBN, Belgium). The responsible German body involved in its preparation was the DIN-Normenausschuss Kunststoffe (DIN Standards Committee Plastics), Working Committee NA 05

7、4-01-03 AA Physikalische, rheologische und analytische Prfungen. EN ISO 22007 consists of the following parts, under the general title Plastics Determination of thermal conductivity and thermal diffusivity: Part 1: General principles Part 2: Transient plane heat source (hot disc) method Part 3: Temp

8、erature wave analysis method Part 4: Laser flash method Part 5: Results of interlaboratory testing of poly(methyl methacrylate) samples (CEN ISO/TR) Part 6: Comparative method for low thermal conductivities using a temperature-modulation technique The DIN Standards corresponding to the International

9、 Standards referred to in this document are as follows: ISO 291 DIN EN ISO 291 ISO 472 DIN EN ISO 472 ISO 22007-1 DIN EN ISO 22007-1 ISO 22007-3 DIN EN ISO 22007-3 ISO/TR 22007-5 DIN CEN ISO/TR 22007-5 ISO 80000-5 DIN EN ISO 80000-5 DIN EN ISO 22007-6:2015-05 3 National Annex NA (informative) Biblio

10、graphy DIN CEN ISO/TR 22007-5, Plastics Determination of thermal conductivity and thermal diffusivity Part 5: Results of interlaboratory testing of poly(methyl methacrylate) samples DIN EN ISO 291, Plastics Standard atmospheres for conditioning and testing DIN EN ISO 472, Plastics Vocabulary DIN EN

11、ISO 22007-1, Plastics Determination of thermal conductivity and thermal diffusivity Part 1: General principles DIN EN ISO 22007-3, Plastics Determination of thermal conductivity and thermal diffusivity Part 3: Temperature wave analysis method DIN EN ISO 80000-5, Quantities and units Part 5: Thermody

12、namics DIN EN ISO 22007-6:2015-05 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 22007-6 March 2015 ICS 83.080.01 English Version Plastics - Determination of thermal conductivity and thermal diffusivity - Part 6: Comparative method for low thermal conduct

13、ivities using a temperature-modulation technique(ISO 22007-6:2014) Plastiques - Dtermination de la conductivit thermique et de la diffusivit thermique - Partie 6: Mthode comparative pour faibles conductivits thermiques utilisant une technique de modulation de la temprature(ISO 22007-6:2014) Kunststo

14、ffe - Bestimmung der Wrmeleitfhigkeit und der Temperaturleitfhigkeit - Teil 6: Vergleichsmethoden fr geringe Wrmeleitfhigkeit unter Anwendung einer Temperaturanpassungsmethode (ISO 22007-6:2014) This European Standard was approved by CEN on 12 March 2015. CEN members are bound to comply with the CEN

15、/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Cen

16、tre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as th

17、e official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Nether

18、lands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All righ

19、ts of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 22007-6:2015 EContents PageForeword .3Introduction 41 Scope . 52 Normative references 53 Terms and definitions . 64 Principle 75 Apparatus . 86 Test specimens 96.1 Measuring temperature. 96.2

20、 Geometry of the probe material . 96.3 Specimen area size . 106.4 Specimen thickness 107 Procedure 108 Expression of results . 108.1 Graphical presentation 108.2 Verification 119 Test report 11Annex A (informative) Results of thermal conductivity of cellular plastics . 13Annex B (informative) Infini

21、te thickness 15Bibliography .16DIN EN ISO 22007-6:2015-05 EN ISO 22007-6:2015 (E) 2 Foreword The text of ISO 22007-6:2014 has been prepared by Technical Committee ISO/TC 61 “Plastics” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 22007-6:2015 by Techni

22、cal Committee CEN/TC 249 “Plastics” the secretariat of which is held by NBN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by September 2015, and conflicting national standards shall be withdrawn a

23、t the latest by September 2015 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN-CENELEC Internal Regulations, the

24、national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

25、 Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 22007-6:2014 has been approved by CEN as EN ISO 22007-6:2015 without any modification. DIN EN ISO 22007-6:2

26、015-05 EN ISO 22007-6:2015 (E) 3 IntroductionThermal insulating properties have become more important in view of power-saving technology. The method which is applicable to measure the lower thermal conductivity in smaller scale with a small amount of a specimen, such as a tray for food, a thermal pr

27、inting film, a gelled sheet for the electric parts inside laptop PC, an adhesive paste, etc., is required for the micro-scale thermal design of plastics. A double-sensor system of high-sensitivity thermopile located in the different distances in the modulated temperature field, which is controlled b

28、y the Peltier thermo-module, is proposed for the determination of thermal conductivity of plastics. A decay parameter is utilized to determine the thermal conductivity of the sample. This method is applied to the measurement of low thermal conductivity in the range below 1,0 W/mK.In contrast to a pu

29、lse or a transient method, high sensitivity and high-temperature resolution are characteristic of temperature modulated technique, in which employment of a lock-in amplifier reduces any influence of noise and interference.The thermal conductivity of materials that are poor conductors of heat is usua

30、lly determined by measuring the larger temperature gradients in the sample produced by a steady flow of heat in one-dimensional geometry. In order to reduce the errors of radiation and convection, it often requires large, precisely shaped samples and extreme care to be used successfully.This part of

31、 ISO 22007 specifies a modulated temperature method to determine the thermal conductivity with a small temperature variation, minimizing the influence of radiation and convection.DIN EN ISO 22007-6:2015-05 EN ISO 22007-6:2015 (E) 4 1 ScopeThis part of ISO 22007 specifies a modulated temperature meth

32、od realizing the measurement of thermal conductivity. An input of temperature deviation is less than 1 K, and a double lock-in method is applied to amplify the small temperature modulation.ISO 22007-3 specifies one of the modulated temperature methods where the phase shift is measured in the thermal

33、ly thick condition, kd 1 k = (/2)1/2, : angular frequency of temperature wave, : thermal diffusivity, and d: thickness of the specimen. In this condition, the backing material does not affect on the phase shift results on the sensor, on which temperature wave decays exponentially.On the other hand,

34、if kd 1, the decay of temperature modulation is influenced by the backing materials. Based on this principle, this part of ISO 22007 specifies the method to determine the thermal conductivity of the sample (as a backing material), comparing the decay of temperature wave detected on both surfaces of

35、the probe material.Thermal conductivity is determined from the correlation between the thermal impedance and the decay ratio of amplitude using two reference materials measured at the same frequency and temperature.The covering thermal conductivity range is adjusted with the reference materials and

36、the probe materials. Basically, thermal conductivity is determined in the range from 0,026 W/mK to 0,6 W/mK.In the case applying the method to inhomogeneous materials, cares must be taken to choose the appropriate measurement conditions in accordance with the thermal penetration depth.2 Normative re

37、ferencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

38、ISO 472, Plastics VocabularyISO 22007-1, Plastics Determination of thermal conductivity and thermal diffusivity Part 1: General principlesISO 22007-3, Plastics Determination of thermal conductivity and thermal diffusivity Part 3: Temperature wave analysis methodISO/TR 22007-5, Plastics Determination

39、 of thermal conductivity and thermal diffusivity Part 5: Results of interlaboratory testing of poly(methyl methacrylate) samplesISO 80000-5, Quantities and units Part 5: ThermodynamicsDIN EN ISO 22007-6:2015-05 EN ISO 22007-6:2015 (E) 5 3 Terms and definitionsFor the purposes of this document, the t

40、erms and definitions given in ISO 472, ISO 22007-1, ISO 22007-3, ISO 80000-5, and the following apply.3.1amplitude of temperature modulationAmpamplitude of the temperature oscillation produced by a modulated-power heat sourceNote 1 to entry: It is expressed in Kelvin.3.2gainratio of Amp at x = d to

41、x = 0; amplitude ratio of the front (x = 0) and rear (x = d) surfaces of the probe material =TTAmpAmpdxdx00whereT0and Tdare the amplitude of modulated temperature measured on the sensor 1 (at x = 0) and the sensor 2 (x = d), respectively.3.3thermal penetration depthDpperiodic oscillations in tempera

42、ture can only be observed for the depths less than Dp, defined asDp=22piwhere is thermal diffusivity; is angular frequency;Dpis the depth at which the amplitude of the temperature oscillation has been attenuated to 0,19 % as derived from expexp ,=()2200019Dppi .Note 1 to entry: The thermal penetrati

43、on depth is expressed in metres.3.4thermal diffusion length1/kwherek is defined as 2Note 1 to entry: The thermal diffusion length is expressed in metres. k is expressed in reciprocal metres.DIN EN ISO 22007-6:2015-05 EN ISO 22007-6:2015 (E) 6 4 PrincipleAs depicted in Figure 1, the probe material in

44、 a flat sheet shape is set between the heat source and the sample, assuming the one-dimensional heat flow.The heat source generates a temperature modulation at a constant amplitude, keeping the average temperature constant that is realized by using a thermo-electric type (Peltier type) temperature c

45、ontrol. Due to the large heat capacity of the heat sink, the temperature modulation in the heat source is not affected by the sample, and the input temperature (x = 0) on the probe is kept constant.The sample is attached to the other side of the probe material. In the thermally thin condition, kd 1,

46、 the decaying temperature modulation at x = d is influenced by the sample.The modulated temperatures at x = 0 and x = d are precisely measured by the attached temperature sensor, respectively, using a lock-in amplification.The characteristic of the principle is listed as below.a) A small temperature

47、 change of the modulated temperature, for instance, less than 1 K, is given at a surrounding temperature. The average temperature is kept at a surrounding temperature, using a thermo-electric type (Peltier-type) temperature control.b) The temperature at a bottom of the heat sink (an opposite side from x = 0 in Figure 1), a deep location in the sample