BS-EN-725-1-2007.pdf
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1、BRITISH STANDARD BS EN 725-1:2007 Advanced technical ceramics Methods of test for ceramic powders Part 1: Determination of impurities in alumina The European Standard EN 725-1:2007 has the status of a British Standard ICS 81.060.30 ? Licensed Copy: London South Bank University, London South Bank Uni
2、versity, Wed Oct 17 01:21:56 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS EN 725-1:2007 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 October 2007 BSI 2007 ISBN 978 0 580 54527 6 National foreword This British Standard is the UK impleme
3、ntation of EN 725-1:2007. It supersedes BS EN 725-1:1997 which is withdrawn. 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 publi
4、cation does not 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. Amendments issued since publication Amd. No. DateComments Licensed Copy: London South Ba
5、nk University, London South Bank University, Wed Oct 17 01:21:56 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 725-1 September 2007 ICS 81.060.30Supersedes EN 725-1:1997 English Version Advanced technical ceramics - Methods of test for ceramic powder
6、s - Part 1: Determination of impurities in alumina Cramiques techniques avances - Mthodes dessai des poudres cramiques - Partie 1 : Dosage des impurets dans lalumine Hochleistungskeramik - Prfverfahren fr keramische Pulver - Teil 1: Bestimmung von Verunreinigungen in Aluminiumoxidpulver This Europea
7、n Standard was approved by CEN on 11 August 2007. 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 conce
8、rning such national standards may be obtained on application to the CEN 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 member into its ow
9、n language and notified to the CEN Management Centre 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, Lithua
10、nia, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2007
11、CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 725-1:2007: E Licensed Copy: London South Bank University, London South Bank University, Wed Oct 17 01:21:56 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN 725-1:2007 (E) 2 Contents Pag
12、e Foreword3 1 Scope 4 2 Normative references4 3 Principle4 4 Reagents.4 4.1 General4 4.2 Reagents for fusion.4 4.3 Sulphuric acid-phosphoric acid mixture for acid dissolution 5 4.4 Reagents for calibration5 5 Apparatus .5 6 Test sample5 7 Decomposition of the test sample.6 7.1 General6 7.2 Fusion .6
13、 7.3 Acid dissolution.6 8 Calibration graph.6 8.1 General6 8.2 Fusion .6 8.3 Acid dissolution.7 8.4 Drawing the calibration curve 7 9 Adjustment of the apparatus7 9.1 Atomic absorption spectrometer.7 9.2 Inductively coupled plasma spectrometer8 10 Measurements8 11 Expression of the results8 12 Test
14、report9 Annex A (informative) Repeatability and reproducibility 10 Bibliography11 Licensed Copy: London South Bank University, London South Bank University, Wed Oct 17 01:21:56 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN 725-1:2007 (E) 3 Foreword This document (EN 725-1:2007) has been prepared by
15、Technical Committee CEN/TC 184 “Advanced technical ceramics”, the secretariat of which is 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 March 2008, and conflicting national standard
16、s shall be withdrawn at the latest by March 2008. This document supersedes EN 725-1:1997. 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 Par
17、t 3: Determination of the oxygen content of non-oxides by thermal extraction with 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 the specific surface area withdrawn Part 7: Determi
18、nation of the absolute density withdrawn Part 8: Determination of tapped bulk density Part 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 t
19、he series were superseded in 2005 by EN ISO 18757 and EN ISO 18753 respectively. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denma
20、rk, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: London South Bank University, London South Bank Uni
21、versity, Wed Oct 17 01:21:56 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN 725-1:2007 (E) 4 1 Scope This Part of EN 725 specifies one fusion and one acid dissolution method for the determination of elements of sodium, potassium, iron, silicon, calcium and magnesium present as impurities in alumina u
22、sing atomic absorption spectroscopy (AAS) or inductively coupled plasma (ICP) spectroscopy. For each element present as impurities, the methods are applicable to the following ranges, calculated as oxides : Sodium oxide: 20 ppm to 6000 ppm Potassium oxide: 20 ppm to 100 ppm Ferric oxide: 20 ppm to 3
23、00 ppm Silica: 50 ppm to 2000 ppm Calcium oxide: 20 ppm to 700 ppm Magnesium oxide: 5 ppm to 1000 ppm 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the la
24、test edition of the referenced document (including any amendments) applies. EN ISO 3696, Water for analytical laboratory use - Specification and test methods (ISO 3696:1987) EN ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories (ISO/IEC 17025:2005) 3 Princ
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