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1、BRITISH STANDARD BS ISO 20508:2003 Fine ceramics (advanced ceramics, advanced technical ceramics) Determination of light transmittance of ceramic films with transparent substrate ICS 81.060.30 ? Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 07:29:13 GMT+00:00 2006, Uncontrolled Copy, (c) BS
2、I BS ISO 20508:2003 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 13 February 2004 BSI 13 February 2004 ISBN 0 580 43442 7 National foreword This British Standard reproduces verbatim ISO 20508:2003 and implements it as the UK national stand
3、ard. The UK participation in its preparation was entrusted to Technical Committee RPI/13, Advanced technical ceramics, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which impl
4、ement international publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purpo
5、rt to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee
6、 any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii and ii
7、i, a blank page, pages 1 to 4, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 07:29:13 GMT+00:00 2
8、006, Uncontrolled Copy, (c) BSI INTERNATIONAL STANDARD ISO 20508 First edition 2003-12-01 Reference number ISO 20508:2003(E) Fine ceramics (advanced ceramics, advanced technical ceramics) Determination of light transmittance of ceramic films with transparent substrate Cramiques techniques Dterminati
9、on de la transmission de la lumire des films cramiques avec substrats transparents BS ISO 20508:2003 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 07:29:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO :80502(3002)E ii ISO 3002 All rithgs reresvde id FDPscalimer ThFDP si fam eliy ctnome ni
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15、eword 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 body interested in a subject for which a tech
16、nical 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 Electrotechnical Commission (IEC) on all matters of
17、 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 adopted by the technical committees are circulated t
18、o 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 rights. ISO shall not be held responsible for
19、 identifying any or all such patent rights. ISO 20508 was prepared by Technical Committee ISO/TC 206, Fine ceramics. BS ISO 20508:2003 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 07:29:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI . vi Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 2
20、7 07:29:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ANRETNIITOTS LANDNADRAISO 05023002:8)E( ISO 3002 r llAithgs reservde 1 Fine ceramics (advanced ceramics, advanced technical ceramics) Determination of light transmittance of ceramic films with transparent substrate 1Scope This International Stand
21、ard specifies a test method for determining the visible light transmittance of a transparent coating material, e.g., the transparent electrode for display devices, in which a fine ceramic thin film is coated on to a substrate. This International Standard is not applicable to deliberately coloured, u
22、neven or non-parallel faced test pieces. A translucent medium is not included in this International Standard. 2Terms and definitions For the purposes of this document, the following terms and definitions apply. 2.1 transmittance proportion of incident light which is transmitted through a transparent
23、 or semi-transparent body for a given luminous flux, expressed as a percentage 2.2 spectral transmittance proportion of incident light which is transmitted through a transparent or semi-transparent body for a given monochromatic wavelength, expressed as a percentage 2.3 reference means of providing
24、transmittance that, for the purposes of this International Standard, is considered to be an air blank 3Principle of test and measurement This International Standard concerns the measurement of spectral transmittance using a spectrophotometer, employing an air blank as a transmittance reference. The
25、substrate alone shall not be used as the reference. The schematic diagram of the measurement equipment is shown in Figure 1. The transmittance is measured by placing the test piece perpendicular to the light beam as indicated in Figure 2 so that the beam is incident perpendicularly on the film side
26、of the test piece and transmitted to the substrate side and thence to the detector. 4Test environment and test conditions 4.1Test environment The test shall be carried out at a temperature between and and in an environment of between and humidity and which is free from mechanical vibrations that may
27、 affect the measurement. If there are specific conditions of use specified for the spectrophotometer, they shall be followed. 100 % 100 % 15 C 27 C 35 % 85 % BS ISO 20508:2003 1 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 07:29:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO :80502(3002
28、)E 2 ISO 3002 All rithgs reresvde 4.2Test conditions The test conditions shall be as follows. a)The test-piece shall be placed with its coated face towards the light source and normal to it. NOTEAlthough in principle the transmittance should not be dependent on the direction of light transmission, t
29、his International Standard unifies the procedure by specifying this condition. The angle tolerance on perpendicularity of the film/substrate to the light beam is . b)The range of wavelength to be used for measurement shall be to . Key 1light source 2monochromator 3sector or beam splitter 4reference
30、beam 5sample beam 6detector 7sample 8sample compartment Figure 1 Schematic diagram of spectrophotometer Key 1light beam 2thin film 3substrate Figure 2 Cross section of installed specimen in light path 1 380 nm780 nm BS ISO 20508:2003 2 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 07:29:13
31、GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 05023002:8)E( ISO 3002 r llAithgs reservde 3 c)The spectral bandwidth of sample beam (in Figure 1) shall be smaller than , and with advantage may be smaller than . d)A wavelength scanning speed and spectrophotometer response time shall be selected for w
32、hich, in accordance with the instruction manual for the instrument, no distortion is produced in the spectrum. 5Apparatus The measurement shall be based on the use of a spectrophotometer with the following minimum performance and functions. 5.1Spectrophotometer, with the following performance specif
33、ications: 5.1.1Wavelength range, capable of operating over at least the range given in 4.2 b). 5.1.2Wavelength accuracy, or less; the accuracy shall be calibrated by use of a wavelength standard before the test. 5.1.3Photometric accuracy, (of the transmittance measurement) or less; the accuracy shal
34、l be checked by use of one or more certified transmittance standards (see Clause 6) before the test, or periodically. 5.2Test-piece holder, capable of holding the test-piece with its surface perpendicular to the incident light beam. 6Certified reference materials 6.1General The following reference m
35、aterials shall be used for calibration and checking the performance of the spectrophotometer. 6.2Wavelength standard A certified optical filter calibrated for wavelength, or a well-established spectral line of the light source shall be used. 6.3Transmittance standard A certified optical filter with
36、defined transmittance as a function of wavelength shall be used. NOTEThe transmittance standard is a specimen authorized by an official organization such as National Institute of Standards and Technology (NIST) or Japan Quality Assurance Organization (JQA). 7Test-piece The test-piece shall comprise
37、a fine ceramic thin film coated on to the surface of a substrate such as glass, or a piece cut from such an item. The test-piece is wide enough for the luminous flux. The measurement is carried out on a test-piece to which no dust is adherent. NOTEDust and other dirt adhering to either face of the t
38、est-piece or reference standards can influence the transmittance spectrum by scattering light. Dust should be removed by a gentle clean-air jet. Adherent dirt should be removed only by methods agreed upon between relevant parties since damage to the film may result. 10 nm 2 nm 0,5 nm 0,5 % BS ISO 20
39、508:2003 3 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 07:29:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO :80502(3002)E 4 ISO 3002 All rithgs reresvde 8Method Unless otherwise instructed in the recommended operational procedure for the spectrophotometer, determine the baseline of the
40、 spectrophotometer in the absence of a test-piece or reference to obtain the transmittance in accordance with the conditions given in 4.1 and over the wavelength range given in 4.2 b). Digitize the curve every over the range to . Unless recently calibrated, insert the cleaned certified wavelength st
41、andard into the test-piece holder and measure the transmittance spectrum. Check that the certified wavelength values are obtained to within . Insert the certified transmittance standard into the test-piece holder and measure its transmittance spectrum. Digitize the transmittance at the wavelength de
42、scribed in the data table of the transmittance standard over the range to . Check that the measured transmittance is in agreement with the certified values to within . Insert the test piece into the test-piece holder and measure its transmittance spectrum. Digitize the transmittance every over the r
43、ange to . Normalize the digitized transmittance spectrum by the air blank to give the test-piece transmittance, and express as a percentage. 9Test report The test report shall contain at least the following information: a)reference to this International Standard, i.e., determined in accordance with
44、ISO 20508; b)name and address of the testing establishment; c)date of the test, a unique identification of the report and of each page, the customers name and address and a signatory to the report; d)description of the spectrophotometer used, and the certified materials used for wavelength and trans
45、mittance standards; e)description of the test-piece and its identity; f)test conditions used, including wavelength range, spectral bandwidth and wavelength scanning speed; g)original spectrum and the digitized transmittance spectrum, expressed as a percentage. 100 % 10 nm380 nm780 nm 0,5 nm 380 nm78
46、0 nm 1 % 10 nm380 nm780 nm BS ISO 20508:2003 4 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 07:29:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI . 5 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 07:29:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 20508:2003 BSI 389 Chiswick
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