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1、BS ISO 23145-1:2007 ICS 81.060.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BRITISH STANDARD Fine ceramics (advanced ceramics, advanced technical ceramics) Determination of bulk density of ceramic powders Part 1: Tap density Licensed CopyChinese University of Hong Kong,
2、20/10/2008 09:41, Uncontrolled Copy, (c) BSI This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 July 2008 BSI 2008 ISBN 978 0 580 57795 6 Amendments/corrigenda issued since publication DateComments BS ISO 23145-1:2007 National foreword This B
3、ritish Standard is the UK implementation of ISO 23145-1:2007. The UK participation in its preparation was entrusted to Technical Committee RPI/13, Advanced technical ceramics. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not
4、 purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. Licensed CopyChinese University of Hong Kong, 20/10/2008 09:41, Uncontrolled Copy, (c) BSI BS ISO 23145
5、-1:2007 Reference number ISO 23145-1:2007(E) ISO 2007 INTERNATIONAL STANDARD ISO 23145-1 First edition 2007-09-15 Fine ceramics (advanced ceramics, advanced technical ceramics) Determination of bulk density of ceramic powders Part 1: Tap density Cramiques techniques Dtermination de la masse volumiqu
6、e des poudres cramiques Partie 1: Masse volumique aprs tassement Licensed CopyChinese University of Hong Kong, 20/10/2008 09:41, Uncontrolled Copy, (c) BSI BS ISO 23145-1:2007 ISO 23145-1:2007(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy,
7、 this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobes licensing policy. The ISO Central Sec
8、retariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to e
9、nsure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2007 All rights reserved. Unless otherwise specified, no part of this publica
10、tion may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva
11、20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2007 All rights reserved Licensed CopyChinese University of Hong Kong, 20/10/2008 09:41, Uncontrolled Copy, (c) BSI BS ISO 23145-1:2007 ISO 23145-1:2007(E) ISO 2007 All rights rese
12、rved iii Contents Page Foreword iv 1 Scope . 1 2 Normative references. 1 3 Principle. 1 4 Apparatus 1 5 Sampling 4 6 Procedure 4 7 Calculation. 5 8 Test report . 5 Bibliography. 6 Licensed CopyChinese University of Hong Kong, 20/10/2008 09:41, Uncontrolled Copy, (c) BSI BS ISO 23145-1:2007 ISO 23145
13、-1:2007(E) iv ISO 2007 All rights reserved Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member
14、 body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Elect
15、rotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopte
16、d by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 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
17、 rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 23145-1 was prepared by Technical Committee ISO/TC 206, Fine ceramics. ISO 23145 consists of the following parts, under the general title Fine ceramics (advanced ceramics, advanced technical ceramics) Deter
18、mination of bulk density of ceramic powders: Part 1: Tap density Part 2: Untapped density Licensed CopyChinese University of Hong Kong, 20/10/2008 09:41, Uncontrolled Copy, (c) BSI BS ISO 23145-1:2007 INTERNATIONAL STANDARD ISO 23145-1:2007(E) ISO 2007 All rights reserved 1 Fine ceramics (advanced c
19、eramics, advanced technical ceramics) Determination of bulk density of ceramic powders Part 1: Tap density 1 Scope This part of ISO 23145 specifies a procedure to determine the tap density of granulated or ungranulated ceramic powders by a constant-volume measuring method. 2 Normative references The
20、 following referenced documents are indispensable for the application of this document. For dated references, only 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, perforat
21、ed metal plate and electroformed sheet Nominal sizes of openings 3 Principle The mass of a known volume of the powder is determined after allowing it to fall freely into a stationary container, and then tapping it under specified conditions until saturation of packing is reached. The mass of the pow
22、der divided by its volume after the test gives its tap density. 4 Apparatus 4.1 Cylindrical container, of stainless steel (see Figure 1) with a volume of 100 cm3 and a diameter-to- height ratio of approximately 1. 4.2 Sieve, as specified in ISO 565, with an aperture size of 0,71 mm. 4.3 Balance, wit
23、h 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. 4.4 Ring (see Figure 1), which can be fitted to the top of the cylindrical container to increase its height. 4.5 Tapping apparatus, which permits the tapping of the ceramic
24、 powder in the cylindrical container and its ring. The tapping stroke should be (10 1) mm and the tapping frequency should be less than 180 taps/min. An example of the tapping apparatus is shown in Figure 2. The cylindrical container shall not be tilted when it is tapped. Licensed CopyChinese Univer
25、sity of Hong Kong, 20/10/2008 09:41, Uncontrolled Copy, (c) BSI BS ISO 23145-1:2007 ISO 23145-1:2007(E) 2 ISO 2007 All rights reserved Key 1 ring, height 50 mm 2 cylindrical container, diameter 50 mm, height 51 mm Figure 1 Example of cylindrical container and ring Licensed CopyChinese University of
26、Hong Kong, 20/10/2008 09:41, Uncontrolled Copy, (c) BSI BS ISO 23145-1:2007 ISO 23145-1:2007(E) ISO 2007 All rights reserved 3 Key 1 ring 2 cylindrical container 3 tapping stroke, (10 1) mm 4 piston 5 guide bearing 6 (10 1) mm 7 cam Figure 2 Example of tapping apparatus Licensed CopyChinese Universi
27、ty of Hong Kong, 20/10/2008 09:41, Uncontrolled Copy, (c) BSI BS ISO 23145-1:2007 ISO 23145-1:2007(E) 4 ISO 2007 All rights reserved 5 Sampling 5.1 In general, the powder should be tested in the as-received condition. In certain instances, the powder may be dried. If the powder is required to be dri
28、ed, it should be dried at (110 10) 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 is required to be dried, it is desirable that the powder be dried until below the weight loss rate of 0,1 %/30 m
29、in. 5.2 Should there be any treatment (e.g. drying) of the powder before measurement, it shall be recorded in the test report. 5.3 The test shall be carried out on three test portions. 6 Procedure 6.1 Weigh the empty cylindrical container. 6.2 Place the ring on the top of the cylindrical container.
30、6.3 Pour the powder, which passed through the sieve, into the cylindrical container with the ring. 6.4 Place the cylindrical container with the ring, filled with the powder, on the tapping apparatus and tap it 1 000 times. During tapping, pour the powder into the cylindrical container with the ring,
31、 to keep the surplus powder (20 to 30) mm higher than the height of the cylindrical container. 6.5 Remove the cylindrical container with the ring from the tapping apparatus, without any vibration. 6.6 Carefully remove the ring from the cylindrical container. 6.7 Remove the cone of surplus powder by
32、gently drawing a straight-edge (see Figure 3) across the top rim of the cylindrical container. Dimensions in millimetres Figure 3 Example of a straight-edge 6.8 Weigh the cylindrical container and its contents. 6.9 Place the ring on the top of the cylindrical container and pour the powder into the c
33、ylindrical container with the ring. Tap the container filled with the powder 100 times using the tapping apparatus. 6.10 Remove the ring from the cylindrical container and remove the cone of surplus powder by gently drawing a straight-edge across the top rim of the cylindrical container. Weigh the c
34、ylindrical container and its contents. Licensed CopyChinese University of Hong Kong, 20/10/2008 09:41, Uncontrolled Copy, (c) BSI BS ISO 23145-1:2007 ISO 23145-1:2007(E) ISO 2007 All rights reserved 5 6.11 Calculate the deviation between the mass of powder weighed in 6.8 and that in 6.10. If the dev
35、iation is more than 0,3 %, repeat steps 6.9 to 6.11 until it becomes less than 0,3 %. 6.12 Repeat steps 6.1 to 6.11 with two additional portions, and average the results. 7 Calculation Calculate the tap density from the mass of the powder which is weighed in 6.10 divided by the volume of the cylindr
36、ical container. 10 t mm p V = where t p is the tap density, in grams per cubic centimetre, of the ceramic powder; 0 m is the mass, in grams, of the empty cylindrical container; 1 m is the mass, in grams, of the cylindrical container full of the powder after tapping; V is the volume, in cubic centime
37、tres, of the cylindrical container (100 cm3). 8 Test report The test report shall include the following information: a) the name of the testing establishment; b) date of the test, report identification and number, operator, signatory; c) a reference to this part of ISO 23145; d) a description of the
38、 powder (material type, manufacturer, batch or code number); e) any pretreatment of the powder, such as drying; f) the result obtained: tap density (kg/m3 or g/cm3); g) any unusual features noted during the determination; h) comments about the test or test results. Licensed CopyChinese University of
39、 Hong Kong, 20/10/2008 09:41, Uncontrolled Copy, (c) BSI BS ISO 23145-1:2007 ISO 23145-1:2007(E) 6 ISO 2007 All rights reserved Bibliography 1 ISO 690-2, Information and documentation Bibliographic references Part 2: Electronic documents or parts thereof 2 ISO 3953, Metallic powders Determination of
40、 tap density 3 EN 725-8:2006, Advanced technical ceramics Methods of test for ceramic powders Part 8: Determination of tapped bulk density 4 JIS R 1628:1997, Test methods for bulk density of fine ceramic powder 5 JIS R 1639-2:1999, Test methods of properties of fine ceramic granules Part 2: Bulk den
41、sity 6 KS L 1621, Fine ceramics Test methods for bulk density of fine ceramic powder 7 ASTM B527-93, Standard Test Method for Determination of Tap Density of Metallic Powders and Compounds 8 ASTM D3347-94, Standard Test Method for Flow Rate and Tap Density of Electrical Grade Magnesium Oxide for Use
42、 in Sheathed Heating Elements Licensed CopyChinese University of Hong Kong, 20/10/2008 09:41, Uncontrolled Copy, (c) BSI BS ISO 23145-1:2007 Licensed CopyChinese University of Hong Kong, 20/10/2008 09:41, Uncontrolled Copy, (c) BSI BS ISO 23145-1:2007 ISO 23145-1:2007(E) ICS 81.060.30 Price based on
43、 6 pages ISO 2007 All rights reserved Licensed CopyChinese University of Hong Kong, 20/10/2008 09:41, Uncontrolled Copy, (c) BSI BS ISO 23145-1:2007 This page has been intentionally left blank Licensed CopyChinese University of Hong Kong, 20/10/2008 09:41, Uncontrolled Copy, (c) BSI BS ISO 23145-1:2
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