BS-EN-725-4-2006.pdf
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1、BRITISH STANDARD BS EN 725-4:2006 Advanced technical ceramics Methods of test for ceramic powders Part 4: Determination of oxygen content in aluminium nitride by XRF analysis The European Standard EN 725-4:2006 has the status of a British Standard ICS 81.060.30 ? BS EN 725-4:2006 This British Standa
2、rd was published under the authority of the Standards Policy and Strategy Committee on 30 November 2006 BSI 2006 ISBN 0 580 49711 9 National foreword This British Standard was published by BSI. It is the UK implementation of EN 725-4:2006. It supersedes DD ENV 725-4:1994 which is withdrawn. The UK p
3、articipation in its preparation was entrusted to Technical Committee RPI/13, Advanced technical ceramics. A list of organizations represented on RPI/13 can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are resp
4、onsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. Amendments issued since publication Amd. No. DateComments EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 725-4 April 2006 ICS 81.060.30Supersedes ENV 725-4:1994 English Versio
5、n Advanced technical ceramics - Methods of test for ceramic powders - Part 4: Determination of oxygen content in aluminium nitride by XRF analysis Cramiques techniques avances - Mthodes dessai pour poudres cramiques - Partie 4: Dtermination de la teneur en oxygne du nitrure daluminium par spectromtr
6、ie de fluorescence XRF Hochleistungskeramik - Prfverfahren fr keramische Pulver - Teil 4: Bestimmung der Sauerstoffgehaltes in Aluminiumnitrid-Pulvern mittels Rntgenfluoreszensanalyse (RFA) This European Standard was approved by CEN on 13 March 2006. CEN members are bound to comply with the CEN/CENE
7、LEC 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 Central Secretariat or to any C
8、EN 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 Central Secretariat has the same status as the official versions. CEN
9、members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switze
10、rland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2006 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No.
11、EN 725-4:2006: E 2 Contents Page Foreword 3 1 Scope.5 2 Normative references .5 3 Principle.5 4 Apparatus and experimental conditions.5 4.1 Apparatus5 4.2 Experimental conditions.5 5 Sample preparation.6 5.1 Granulometry 6 5.2 Test piece preparation6 6 Calibration.6 6.1 Preparation of standards6 6.2
12、 Calibration curves.6 6.3 Recalibration.7 6.4 Sensitivity limit of detection7 7 Repeatability7 8 Test report.8 Bibliography.10 EN 725-4:2006 3 Foreword This European Standard (EN 725-4:2006) has been prepared by Technical Committee CEN/TC 184 “Advanced technical ceramics”, the secretariat of which i
13、s held by BSI. 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 October 2006, and conflicting national standards shall be withdrawn at the latest by October 2006. This European Standard supersedes
14、ENV 725-4:1994. The main changes in the new edition are: - revision of the foreword to reflect changes in the EN 725 series; - changes to the normative references; - modification of the test piece preparation requirements; - modification of the test report requirements; - addition of a bibliographic
15、al reference. EN 725 Advanced technical ceramics Methods of test for ceramic powders was prepared in Parts as follows: Part 1: Determination of impurities in alumina Part 2: Determination of impurities in barium titanate Part 3: Determination of oxygen content of non-oxides by thermal extraction wit
16、h a carrier gas Part 4: Determination of oxygen content in aluminium nitride by XRF analysis Part 5: Determination of particle size distribution Part 6: Determination of specific surface area withdrawn Part 7: Determination of absolute density withdrawn Part 8: Determination of tapped bulk density P
17、art 9: Determination of un-tapped bulk density Part 10: Determination of compaction properties Part 11: Determination of densification on natural sintering Part 12: Chemical analysis of zirconia Parts 6 and 7 of the series were superseded in 2005 by EN ISO 18757 and EN ISO 18753 respectively. Accord
18、ing to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, EN 725-4:2006 4 Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
19、Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 725-4:2006 5 1 Scope This European Standard specifies a method for the determination of oxygen contents of 2 % or less in aluminium nitride powd
20、er, by XRF analysis. 2 Normative references The following referenced documents are indispensable for the application of this European Standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) appli
21、es. EN 725-5, Advanced technical ceramics Methods of test for ceramic powders Part 5: Determination of particle size distribution EN ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories (ISO/IEC 17025:2005) EN ISO 18757, Fine ceramics (advanced ceramics, adv
22、anced technical ceramics) Determination of specific surface area of ceramic powders by gas adsorption using the BET method (ISO 18757:2003) 3 Principle The sample is compacted to obtain a pellet, and the net intensity of the oxygen K characteristic (I0 K) of the pellet is measured by XRF spectromete
23、r. The net intensity is the background intensity subtracted from the peak intensity at the peak position. The oxygen content in the sample is determined from this net intensity and by reference to previously defined calibration graphs; the calibration graph expresses the direct relation between net
24、intensity and oxygen concentration. Calibration standards are prepared from different mixtures of fine aluminium nitride powder and a fine alumina powder. 4 Apparatus and experimental conditions 4.1 Apparatus Sequential X-ray fluorescence spectrometer, equipped with a multilayer pseudo crystal and a
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