BS-EN-725-2-2007.pdf
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1、BRITISH STANDARD BS EN 725-2:2007 Advanced technical ceramics Methods of test for ceramic powders Part 2: Determination of impurities in barium titanate The European Standard EN 725-2:2007 has the status of a British Standard ICS 81.060.30 ? BS EN 725-2:2007 This British Standard was published under
2、 the authority of the Standards Policy and Strategy Committee on 30 November 2007 BSI 2007 ISBN 978 0 580 55203 8 National foreword This British Standard is the UK implementation of EN 725-2:2007. It supersedes DD ENV 725-2:1994 which is withdrawn. The UK participation in its preparation was entrust
3、ed 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 purport to include all the necessary provisions of a contract. Users are responsible for its correct application
4、. 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 725-2 November 2007 ICS 81.060.30Supersedes ENV 725-2:1994 English Version Advanced technical ceramics -
5、Methods of test for ceramic powders - Part 2: Determination of impurities in barium titanate Cramiques techniques avances - Mthodes dessai pour poudres cramiques - Partie 2 : Dtermination des impurets dans le titanate de baryum Hochleistungskeramik - Prfverfahren fr keramische Pulver - Teil 2: Besti
6、mmung von Verunreinigungen in Bariumtitanatpulvern This European Standard was approved by CEN on 23 September 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
7、 alteration. Up-to-date lists and bibliographical references concerning 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 b
8、y translation under the responsibility of a CEN member into its own 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,
9、 Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, 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 NO
10、RMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2007 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 725-2:2007: E EN 725-2:2007 (E) 2 Contents Page Foreword3 1 Scope 4 2 Normative references4 3 Principle4 4 Reagents.4
11、5 Apparatus .5 6 Preparation of sample solution5 6.1 Sample calcination 5 6.2 Test sample5 6.3 Dissolution of the test sample5 7 Calibration6 7.1 Standard addition method6 7.2 Calibration method6 8 Procedure .6 8.1 ICP spectrometer operation6 8.2 Standard addition method7 8.3 Calibration method7 9 T
12、est report7 EN 725-2:2007 (E) 3 Foreword This document (EN 725-2:2007) has been prepared by 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 iden
13、tical text or by endorsement, at the latest by May 2008, and conflicting national standards shall be withdrawn at the latest by May 2008. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held respons
14、ible for identifying any or all such patent rights. This document supersedes ENV 725-2:1994. 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
15、Part 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: Dete
16、rmination 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 Part 6 and part
17、 7 of this series were superseded in 2005 by EN ISO 18757 and EN ISO 18753. 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, Denmark, E
18、stonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. EN 725-2:2007 (E) 4 1 Scope This part of EN 725 describes a method
19、for the determination of impurities in barium titanate powders using inductively coupled plasma optical emission spectroscopy (ICP-OES). The method is applicable only to stoichiometric barium titanate. The maximum concentrations measured for each impurity are as follows: Sr 4 mg/g (4 000 ppm) Ca 500
20、 g/g (500 ppm) K 200 g/g (200 ppm) Na, Mg, Al, Fe, Nb 100 g/g (100 ppm) The minimum concentration or detection limits are from 1 g/g to 5 g/g (1 ppm to 5 ppm). 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only
21、 the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories (ISO/IEC 17025:2005) 3 Principle Calcined barium titanate powder is
22、dissolved in a mixture of hydrochloric acid and hydrogen peroxide, and the impurities in the solution are determined by ICP-OES analysis, using an addition method of synthetic matrix matched solutions for the calibration. 4 Reagents Spectroscopic grades of the following reagents shall be used. 4.1 Q
23、uartz distilled water or water of equivalent purity. 4.2 Hydrochloric acid, density = 1,18 g/cm. 4.3 Hydrogen peroxide, 110 V/V. 4.4 Barium chloride solution, 99,999 % purity. 4.5 Titanium chloride, TiCl4, in solution, 99,999 % purity. 4.6 Reagents for calibration A commercial solution, or solution
24、obtained by dissolution of a pure chemical compound, of concentration 1g/l shall be used for each of the following: strontium; calcium; potassium; sodium; magnesium; aluminium; iron; and niobium. EN 725-2:2007 (E) 5 5 Apparatus 5.1 Spectrometer for inductively coupled plasma atomic emission, with a
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