ISO 20508:2003

Fine ceramics (advanced ceramics, advanced technical ceramics) — Determination of light transmittance of ceramic films with transparent substrate

ISO 20508:2003 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. ISO 20508:2003 is not applicable to deliberately coloured, uneven or non-parallel faced test pieces. A translucent medium is not included in this International Standard.

Céramiques techniques — Détermination de la transmission de la lumière des films céramiques avec substrats transparents

General Information

• Status: Published
• Publication Date: 27-Nov-2003
• ICS: 81.060.30 - Advanced ceramics
• Technical Committee: ISO/TC 206 - Fine ceramics
• Drafting Committee: ISO/TC 206/WG 10 - Coatings
• Current Stage: 9093 - International Standard confirmed
• Completion Date: 30-Nov-2020

Relations

• Consolidated By: ISO 2553:2013 - Welding and allied processes — Symbolic representation on drawings — Welded joints
• Effective Date: 06-Jun-2022

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 20508
First edition
2003-12-01
Fine ceramics (advanced ceramics,
advanced technical ceramics) —
Determination of light transmittance of
ceramic films with transparent substrate
Céramiques techniques — Détermination de la transmission de la
lumière des films céramiques avec substrats transparents

Reference number
ISO 20508:2003(E)
©
ISO 2003

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ISO 20508:2003(E)
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ISO 20508:2003(E)
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
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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 identifying any or all such patent rights.
ISO 20508 was prepared by Technical Committee ISO/TC 206, Fine ceramics.
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INTERNATIONAL STANDARD ISO 20508:2003(E)
Fine ceramics (advanced ceramics, advanced technical
ceramics) — Determination of light transmittance of ceramic
films with transparent substrate
1Scope
This International Standard 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, uneven or
non-parallel faced test pieces. A translucent medium is not included in this International Standard.
2 Terms 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 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 100 % transmittance that, for the purposes of this International Standard, is considered to
be an air blank
3 Principle 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 substrate alone shall not be used as the
100 %
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 of the test piece and transmitted to the substrate side and thence to the
detector.
4 Test environment and test conditions
4.1 Test environment
◦ ◦
The test shall be carried out at a temperature between 15C2 and 7C3 and in an environment of between 5%
and 85 % humidity and which is free from mechanical vibrations that may affect the measurement. If there are
specific conditions of use specified for the spectrophotometer, they shall be followed.
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ISO 2003 – All rights reserve
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