DIN EN 1159-3-2008 Advanced technical ceramics - Ceramic composites thermophysical properties - Part 3 Determination of specific heat capacity(includes Corrigendum AC 2008) English.pdf

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1、June 2008DEUTSCHE NORM English price group 13No part of this standard 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 81.060.30!$O+T“1440849www

2、.din.deDDIN EN 1159-3SupersedesDIN EN 1159-3:2003-07www.beuth.deAdvanced technical ceramics Ceramic composites, thermophysical properties Part 3: Determination of specific heat capacity (includes Corrigendum AC:2008) English version of DIN EN 1159-3:2008-06 Hochleistungskeramik Keramische Verbundwer

3、kstoffe, thermophysikalische Eigenschaften Teil 3: Bestimmung der spezifischen Wrmekapazitt (enthlt Berichtigung AC:2008) Englische Fassung DIN EN 1159-3:2008-06 Document comprises 28 pagesDIN EN 1159-3:2008-06 2 National foreword This standard has been prepared by Technical Committee CEN/TC 184 “Ad

4、vanced technical ceramics” (Secretariat: BSI, United Kingdom), Subcommittee SC 1 “Advanced technical ceramics Ceramic composites”. At present a DIN committee does not exist for this standard since the parties concerned have not shown any interest in work on the subject. The Normenausschuss Materialp

5、rfung (Materials Testing Standards Committee) is obliged to publish the standard, however, as the subject falls in its domain. Corrigendum AC:2007 applied to the German version only and therefore did not affect the English text. Amendments This standard differs from DIN V ENV 1159-3:1995-04 as follo

6、ws: a) The standard has been editorially revised. Compared with DIN EN 1159-3:2003-07, the following correction has been made: a) The equation for the derivation of enthalpy and heat-capacity values for temperatures above 273,15 K (Page 23) has been corrected. Previous editions DIN V ENV 1159-3: 199

7、5-04 DIN EN 1159-3: 2003-07 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1159-3 April 2003 +AC ICS 81.060.20 English version Advanced technical ceramics Ceramic composites, thermophysical properties Part 3: Determination of specific heat capacity Cramiques techniques avances Composites crami

8、ques, proprits thermophysiques Partie 3: Dtermination de la capacit thermique spcifique Hochleistungskeramik Keramische Verbundwerkstoffe, thermophysikalische Eigenschaften Teil 3: Bestimmung der spezifischen Wrmekapazitt EN 1159-3:2003 was approved by CEN on 2003-01-02 and Corrigendum AC:2008 on 20

9、08-04-16. CEN members are bound to comply with the CEN/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 obt

10、ained on application to the Management Centre or to any CEN member. The European Standards exist 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 Management Cen

11、tre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Pola

12、nd, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any form and by

13、 any means reserved worldwide for CEN national Members. Ref. No. EN 1159-3:2003 + AC:2008 EApril 2008 ContentsForeword31 Scope 42 Normative references 43 Terms and definitions44 Method A - Drop calorimetry.54.1 Principle54.2 Apparatus .54.3 Standard reference materials .54.4 Test specimens 54.5 Cali

14、bration of calorimeter .54.5.1 General54.5.2 Electrical Calibration .64.5.3 Calibration using standard reference material .64.6 Test procedures .64.6.1 Test without a crucible 64.6.2 Test with a crucible64.6.3 Description of test .74.7 Calculations74.7.1 General74.7.2 Determination of the calorimetr

15、ic calibration factor 84.7.3 Determination of mean specific heat capacity pC 85 Method B - Differential scanning calorimetry .95.1 Principle95.1.1 General95.1.2 Stepwise heating method95.1.3 Continuous heating method .95.2 Apparatus .105.2.1 Differential scanning calorimeter.105.3 Standard reference

16、 materials, SRM .105.4 Test specimens 105.5 Temperature calibration105.6 Test procedure for the determination of Cp115.6.1 General115.6.2 Method 1: Measurements requiring the knowledge of the K factor115.6.3 Method 2: Measurements requiring the use of a reference standard material (SRM)125.7 Calcula

17、tion of results 135.7.1 Method requiring the knowledge of the K factor 135.7.2 Method using an SRM .146 Test report 16Annex A (normative) Drop calorimetry - Determination of the calibration factor using standardreference material 19Annex B (informative) Standard reference material.20Annex C (informa

18、tive) Materials for calorimeter calibrations .25Bibliography 26DIN EN 1159-3:2008-06 EN 1159-3:2003+AC:2008 (E)2PageForewordThis document (EN 1159-3:2003) has been prepared by Technical Committee CEN/TC 184 “Advanced technicalceramics“, the secretariat of which is held by BSI.This European Standard

19、shall be given the status of a national standard, either by publication of an identical text orby endorsement, at the latest by October 2003, and conflicting national standards shall be withdrawn at the latestby October 2003.This document supersedes ENV 1159-3:1995.EN 1159 Advanced technical ceramic

20、s Ceramic composites, thermophysical properties consists of three parts:Part 1: Determination of thermal expansionPart 2: Determination of thermal diffusivityPart 3: Determination of specific heat capacityAnnex A is normative. Annexes B and C are informative.According to the CEN/CENELEC Internal Reg

21、ulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,Slovakia, Spain, Swed

22、en, Switzerland and the United Kingdom.DIN EN 1159-3:2008-06 EN 1159-3:2003+AC:2008 (E)31 ScopeThis part of EN 1159 describes two methods for the determination of the specific heat capacity of ceramic matrixcomposites with continuous reinforcements (1D, 2D, 3D).Unidirectional (1D), bi-directional (2

23、D) and tridirectional (XD, with 2 T 8,61 K : T0= 8,61 K A3= +0,450764E-02A0= -0,5147E+01 A4= -0,51464E-03Cp= exp (P1) J-mol-1K-1A1= +0,34127E+00 A5= +0,397864E-04A2= -0,333446E-01 A6= -0,152136E-05125,0 K T 45,0 K : T0= 40,0 K A3= +0,95173E-04A0= +0,6966E+00 A4= -0,35910E-05Cp= P2 J-mol-1K-1A1= +0,5

24、9387E-01 A5= -0,6498E-07A2= +0,40357E-02 A6= +0,4089E-08273,15 K T 125,0 K : T0= 125,0 K A3= -0,83967E-04A0= +0,21993E+02 A4= +0,19133E-05Cp= P3 J-mol-1K-1A1= +0,38853E+00 A5= -0,31778E-07A2= +0,13955E-02 A6= +0,29562E-09Above 273,15 K, enthalpy and heat-capacity values were derived from the followi

25、ng equation:A = +6,6253E+07 E = -8,57516E-02B = -4,54238E+06 F = +4,299063E-05C = -5,475599E+04 G = -1,15192E-08K = +2,5819702E+05 H = +1,26351E-12D = +2,574076E+02HT- H273,15= AT-2+ BT-1+ CInT + K + DT + ET2+ FT3+ GT4+ HT5J-mol-1DIN EN 1159-3:2008-06EN 1159-3:2003+AC:2008 (E)23Low-temperature measu

26、rements from 10 to 380 K were made with a vacuum adiabatic calorimeter 1.2 operatedautomatically under the control of a minicomputer. Enthalpy measurements at eighteen temperatures from 273 to1173 K were made by the drop method using a Bunsen ice calorimeter 3.4. From 1173 to 2250 K, enthalpymeasure

27、ments were made with an adiabatic receiving calorimeter 5.6. All temperatures are expressed on theIPTS-68 scale. In the correction of specimen mass data for atmospheric buoyancy, a density of 3,97 g.cm-3fora -AI2O3was assumed. The functions presented were fitted by the method of least squares to the

28、se data. Thetabulated values were calculated using these functions.An occasional particle may contain an end smear due to the method employed in cutting the material. Thesesmears do not contribute significantly to the enthalpy values given in this certificate. However, it is recommendedthat the mate

29、rial be heated to 1000 C in air prior to heat-capacity measurements below 350 K. Microprobeanalyses indicate small quantities of chloride, titanium, calcium, silicon, iron, copper, and zinc on the surfaces.Spectrographic examination indicates the purity of the bulk material to be at least 99,95 + pe

30、rcent, with the majorimpurities being magnesium, calcium, chromium, iron, silicon, and titanium. Examination by atomic absorptionspectrometry for magnesium, indicated as the major impurity by the above tests, shows that the surfacecontamination by this element amounts to 1 ppm, or less, and that the

31、 bulk material contains 10 ppm, or less, ofmagnesium. In addition, the material absorbs a small amount (30 ppm or less, presumably moisture) of weight onthe ground surfaces on exposure to room air, and may require heating in an inert atmosphere, if this amount ofmoisture is of concern. Combustion an

32、alysis in oxygen indicates the material contains on the order of 10 ppm orless of carbonaceous material calculated as carbon.DIN EN 1159-3:2008-06EN 1159-3:2003+AC:2008 (E)24Annex C(informative)Materials for calorimeter calibrationsThe following table gives the temperatures and heat of fusion for a

33、selection of metallic reference materials.Table C.1 - Temperatures and heat of fusion for a selection of metallic reference materialMaterial Temperature Heat of fusion(C)(J.g-1)Indium 156,4 28,4Tin 231,8 56,1Lead 327,4 24,7Zinc 419,4 111,2Aluminium 660 395Silver 962 104,5Gold 1064 64Nickel 1455 299Palladium 1554 162DIN EN 1159-3:2008-06EN 1159-3:2003+AC:2008 (E)25BibliographyEN ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories (ISO/IEC17025:1999)DIN EN 1159-3:2008-06EN 1159-3:2003+AC:2008 (E)26