1、November 2016 English price group 10No 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 81.060.30!%q$“2587801www.din.de
2、DIN EN ISO 23145-2Fine ceramics (advanced ceramics, advanced technical ceramics) Determination of bulk density of ceramic powders Part 2: Untapped density (ISO 231452:2012);English version EN ISO 231452:2016,English translation of DIN EN ISO 23145-2:2016-11Hochleistungskeramik Bestimmung der Dichte
3、von keramischen Pulvern Teil 2: Schttdichte (ISO 231452:2012);Englische Fassung EN ISO 231452:2016,Englische bersetzung von DIN EN ISO 23145-2:2016-11Cramiques techniques Dtermination de la masse volumique des poudres cramiques Partie 2: Masse volumique sans tassement (ISO 231452:2012);Version angla
4、ise EN ISO 231452:2016,Traduction anglaise de DIN EN ISO 23145-2:2016-11SupersedesDIN EN 7259:200605www.beuth.deDocument comprises sw pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.11.16DIN EN ISO 23145-2:2016-11 2 A comma is
5、used as the decimal marker. National foreword The text of ISO 23145-2:2012 has been prepared by Technical Committee ISO/TC 206 “Fine ceramics” and has been taken over as EN ISO 23145-2:2016 by Technical Committee CEN/TC 184 “Advanced technical ceramics” (Secretariat: DIN, Germany). The responsible G
6、erman body involved in its preparation was DIN-Normenausschuss Materialprfung (DIN Standards Committee Materials Testing), Working Committee NA 062-02-91 AA Terminologie von Hochleistungskeramik und Prfung von monolithischen keramischen Werkstoffen und Pulvern. The DIN Standards corresponding to the
7、 International Standards referred to in this document are as follows: ISO 565:1990 DIN ISO 565:1998-12 ISO 3923-1 DIN EN ISO 3923-1 ISO 80000-1:2009 DIN EN ISO 80000-1:2013-08 ISO/IEC 17025:2005 DIN EN ISO/IEC 17025:2005-08 Amendments This standard differs from DIN EN 725-9:2006-05 as follows: a) a
8、funnel has been added in Clause 4 “Apparatus”; b) in Subclause 4.4 “Balance”, a recommendation for very fluffy powders has been included; c) new figures showing the apparatus have been included; d) the specifications for sampling and testing have been modified and rendered more precise; e) ISO 23145
9、-2:2012 has been adopted. Previous editions DIN EN 725-9: 1997-05, 2006-05 DIN EN ISO 23145-2:2016-11 3 National Annex NA (informative) Bibliography DIN EN ISO 3923-1, Metallic powders Determination of apparent density Part 1: Funnel method DIN EN ISO 80000-1:2013-08, Quantities and units Part 1: Ge
10、neral (ISO 80000-1:2009 + Cor -1:2011) DIN EN ISO/IEC 17025:2005-08, General requirements for the competence of testing and calibration laboratories (ISO/IEC 17025:2005) DIN ISO 565:1998-12, Test sieves Metal wire cloth, perforated metal plate and electroformed sheet Nominal sizes of openings (ISO 5
11、65:1990) DIN EN ISO 23145-2:2016-11 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 23145-2 April 2016 ICS 81.060.30 Supersedes EN 725-9:2006English Version Fine ceramics (advanced ceramics, advanced technical ceramics) Determination of bulk density of cer
12、amic powders Part 2: Untapped density (ISO 23145-2:2012) Cramiques techniques Dtermination de la masse volumique des poudres cramiques Partie 2: Masse volumique sans tassement (ISO 23145-2:2012) Hochleistungkerami Bestimmung der Dichte von keramischen Pulvern Teil 2: Schttdichte (ISO 23145-2:2012) T
13、his European Standard was approved by CEN on 25 March 2016. 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 refere
14、nces concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre 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
15、member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the 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,
16、 France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHE
17、S KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 23145-2:2016 EEN ISO 23145-2:2016 (E) 2 Contents Page European foreword . 3 Foreword 4 1
18、 Scope 5 2 Normative references 5 3 Principle . 5 4 Apparatus . 5 5 Sampling . 8 6 Procedure. 9 7 Calculation . 9 8 Test report . 9 Bibliography . 11 DIN EN ISO 23145-2:2016-11 EN ISO 23145-2:2016 (E) 3 European foreword The text of ISO 23145-2:2012 has been prepared by Technical Committee ISO/TC 20
19、6 “Fine ceramics” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 23145-2:2016 by Technical Committee CEN/TC 184 “Advanced technical ceramics” the secretariat of which is held by DIN. This European Standard shall be given the status of a national standar
20、d, either by publication of an identical text or by endorsement, at the latest by October 2016, and conflicting national standards shall be withdrawn at the latest by October 2016. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. C
21、EN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 725-9:2006. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Aus
22、tria, 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, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Swed
23、en, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 23145-2:2012 has been approved by CEN as EN ISO 23145-2:2016 without any modification. DIN EN ISO 23145-2:2016-11 ForewordISO (the International Organization for Standardization) is a worldwide federation of national
24、standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International
25、 organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.International Standards are drafted in accordance with the rules gi
26、ven in the ISO/IEC Directives, Part 2.The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least
27、75 % of the member bodies casting a vote.Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.ISO 23145-2 was prepared by Technical Committee ISO/TC 206, F
28、ine ceramics.ISO 23145 consists of the following parts, under the general title Fine ceramics (advanced ceramics, advanced technical ceramics) Determination of bulk density of ceramic powders: Part 1: Tap density Part 2: Untapped densityEN ISO 23145-2:2016 (E) DIN EN ISO 23145-2:2016-11 41 ScopeThis
29、 part of ISO 23145 specifies the test method to determine the untapped density of granulated or ungranulated ceramic powders by a constant-volume measuring method.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For dated references, on
30、ly the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 565:1990, Test sieves Metal wire cloth, perforated metal plate and electroformed sheet Nominal sizes of openingsISO 80000-1:2009, Quantities and units Part 1: Ge
31、neralISO/IEC 17025:2005, General requirements for the competence of testing and calibration laboratories3 PrincipleThe mass of a known volume of the powder is determined after allowing it to fall freely into a stationary container, avoiding vibration. The mass of the powder divided by its volume aft
32、er the test gives its untapped density.4 Apparatus4.1 Funnel (Figure 1), of stainless steel, with an orifice of diameter 2,5 mm and the other with an orifice of diameter 5,0 mm. The funnel shall be made of a non-magnetic, corrosion-resistant metallic material such as stainless steel (for example SUS
33、 304) having sufficient wall thickness and hardness to withstand distortion and excessive wear.4.2 Cylindrical container (Figure 2), of stainless steel, with a volume of 100 cm3 and a diameter-to-height ratio of approximately 1.4.3 Sieve, as specified in ISO 565, with an aperture size of 0,71 mm.4.4
34、 Balance, with a precision of 0,1 g or 0,01 g.A balance with a precision of 0,01 g should be used for very fluffy powders such as aerosil (fumed silica).4.5 Straight edge (Figure 3), to remove the cone of surplus powder by gently drawing it.4.6 Stand and horizontal vibration-free base. A stand to su
35、pport the funnel concentric with the cylindrical container so that the bottom of the funnel orifice is approximately 50 mm above the top of the cylindrical container when the apparatus is assembled as shown in Figure 4.EN ISO 23145-2:2016 (E) DIN EN ISO 23145-2:2016-11 5 Dimensions in millimetres655
36、0,813,3241,48560600,21820555,23,2 0,055,0 0,04 2,5 0,04aaOr 6,4 0,05 for 5,0 mm diameter.Figure 1 Example of a funnelEN ISO 23145-2:2016 (E) DIN EN ISO 23145-2:2016-11 6Dimensions in millimetres50151Key1 cylindrical containerFigure 2 Example of a cylindrical containerDimensions in millimetres7021512
37、Figure 3 Example of a straight edgeEN ISO 23145-2:2016 (E) DIN EN ISO 23145-2:2016-11 7 Dimensions in millimetres1250Key1 funnel2 cylindrical containerFigure 4 Example of apparatus for untapped density5 Sampling5.1 In general, the powder should be tested in the as-received condition. In certain inst
38、ances the powder may be dried. If the powder is required to be dried, it should be dried at (110 5) C for at least 1 h and cooled to room temperature in a desiccator. If the powder contains volatile substances, it shall not be dried.NOTE If the powder must be dried, it is preferred that the powder b
39、e dried until the rate of mass loss is less than 0,1 % (by mass) per 30 min.5.2 Should there be any treatment (e.g. drying) of the powder before measurement, it shall be recorded in the test report.EN ISO 23145-2:2016 (E) DIN EN ISO 23145-2:2016-11 85.3 The test shall be carried out on three test po
40、rtions.6 Procedure6.1 Weigh the empty cylindrical container (m0).6.2 Pass the ceramic powder through the sieve.6.3 Fill the funnel having the 2,5 mm diameter orifice with the powder and allow the powder to flow through the orifice into the cylindrical container until it is completely filled and the
41、powder overflows its periphery.NOTE 1 If the powder does not flow through the 2,5 mm diameter orifice, use the funnel having the 5,0 mm diameter orifice.NOTE 2 If the powder does not flow through the 5,0 mm diameter orifice, it is allowed to poke the powder within the funnel by a thin wire to stimul
42、ate flowing.6.4 Remove the cone of surplus powder by gently drawing a straight edge across the top rim of the cylindrical container without compressing it and take care not to jar or vibrate the cylindrical container.6.5 After levelling the powder, tap the cylindrical container lightly to settle the
43、 powder in order to avoid spilling it during transport.6.6 Weigh the cylindrical container and its contents (m1).6.7 Repeat the procedure in 6.1 to 6.6 with two additional portions and average the results.7 CalculationCalculate the untapped density from the mass of the powder divided by the volume o
44、f the cylindrical container and round the result to 0,001 g/cm3or 1 kg/m3in accordance with ISO 80000-1.pmmVt=10(1)whereptis the untapped density, in grams per cubic centimetre, of the ceramic powder;m0is the mass, in grams, of the empty cylindrical container;m1is the mass, in grams, of the cylindri
45、cal container full of the powder;V is the volume, in cubic centimetres, of the cylindrical container (100 cm3)8 Test reportThe test report shall be in accordance with the reporting provisions of ISO/IEC 17025 and shall contain the following information:a) the name of the testing establishment;b) dat
46、e of the test, report identification and number, operator, signatory;c) temperature and relative humidity in the laboratoryd) a reference to this part of ISO 23145;EN ISO 23145-2:2016 (E) DIN EN ISO 23145-2:2016-11 9 e) all details for identification of the test sample (material type, manufacturer,
47、batch or code number);f) all operations not specified by this part of ISO 23145, or regarded as optional (e.g. any pretreatment of the powder such as drying);g) the result obtained: untapped density (kg/m3or g/cm3);h) details of any occurrence which may have affected the result (e.g. blockage of ori
48、fice, powder poking by a wire, etc.);i) comments about the test or test results.EN ISO 23145-2:2016 (E) DIN EN ISO 23145-2:2016-11 10Bibliography1 EN 725-9, Advanced technical ceramics Method of test for ceramic powders Part 9. Determination of un-tapped bulk density2 JIS R 1628, Test methods for bu
49、lk density of fine ceramic powder3 JIS R 1639-2, Test methods of properties of fine ceramic granules Part 2: Bulk density4 ISO 3923-1, Metallic powders Determination of apparent density Part 1: Funnel method5 ASTM B212, Standard Test Method for Apparent Density of Free-Flowing Metal Powders Using the Hall Flowmeter Funnel6 ISO 690-2, Information and documentation Bibliographic references Part 2: Electronic documents or parts thereofEN ISO 23145-2:2016 (E) DIN EN I
