GB/T 24981.1-2020 (GB/T24981.1-2020, GBT 24981.1-2020, GBT24981.1-2020) & related versions
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Test methods of rare earth long afterglow phosphors - Part 1: Determination of emission dominantpeak and chromaticity coordinates
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GB/T 24981.1-2020
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Test methods of long afterglow phosphors activated by rare earths -- Part 1: Determination of emission dominant peak and chromaticity coordinates
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GB/T 24981.1-2020
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.120.99
H 14
Replacing GB/T 24981.1-2010
Test methods of rare earth long afterglow phosphors -
Part 1: Determination of emission dominantpeak and
chromaticity coordinates
ISSUED ON: NOVEMBER 19, 2020
IMPLEMENTED ON: OCTOBER 01, 2021
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Method principle ... 4
3 Instruments and devices ... 4
4 Test procedures ... 5
5 Precision ... 6
References ... 7
Test methods of rare earth long afterglow phosphors -
Part 1: Determination of emission dominantpeak and
chromaticity coordinates
1 Scope
This Part of GB/T 24981 specifies the determination method of emission
dominantpeak and chromaticity coordinates of rare earth long afterglow
phosphors.
This Part applies to the determination of emission dominantpeak and
chromaticity coordinates of rare earth long afterglow phosphors.
2 Method principle
The sample emits visible light of 380 nm ~ 720 nm under the excitation of 365
nm ultraviolet rays; the monochromatic light signal is converted into an electrical
signal by the spectral radiation tester for spectroscopy and photoelectric
conversion; then, the electrical signal value corresponding to the light intensity
is obtained by correction of the standard lamp. Measure the entire visible light
band at a certain wavelength interval; obtain the relative emission spectral
power distribution of the sample in the entire visible light band; calculate the
chromaticity coordinates and emission dominantpeak of the light emitted by the
sample with reference to CIE 1931.
3 Instruments and devices
3.1 Spectral radiation tester
The spectral radiation tester shall meet the following conditions:
a) Wavelength accuracy: ±2 nm;
b) Accuracy of chromaticity coordinates: ±0.001;
c) Spectral range: 380 nm ~ 720 nm.
3.2 Excitation light source
The 365 nm ultraviolet low pressure mercury lamp is equipped with a color filter;
the peak transmittance of the filter shall be greater than 10%; transmittance of
380 nm ~ 720 nm shall not be greater than 0.01%; the radiation intensity stability
of 365 nm shall be better than 0.2%/10 min, otherwise, it shall be compensated.
3.3 Sample pan
The sample pan is black, with an inner diameter of 20 mm and a depth of 3 mm.
4 Test procedures
4.1 Test conditions
4.1.1 Ambient temperature: 22 °C ~ 27 °C.
4.1.2 Relative humidity: ≤70%.
4.1.3 During the measurement process, in addition to the specified excitation
light source, there shall be no stray light interference such as visible light or
ultraviolet light.
4.2 Instrument calibration
Be stable for 10 min ~ 30 min according to the requirements of the instrument.
Refer to the instrument manual to calibrate the instrument.
4.3 Test
4.3.1 Load the sample into the sample pan; compact and make the surface flat.
4.3.2 Place the sample pan in the sample chamber to be excited, so that the
sample is excited by the ultraviolet lamp.
4.3.3 Irradiate the sample under an ultraviolet lamp for more than 1 min; scan
from the 380 nm ~ 720 nm wavelength range; measure the relative spectral
power distribution of the sample and the peak wavelength of the emission
dominantpeak. The emission dominantpeak is expressed by the peak
wavelength (λ).
4.3.4 According to the measured relative spectral power distribution, calculate
the chromaticity coordinates (x, y) with reference to CIE 1931.
4.3.5 Repeat the test 3 times for a sample; take the arithmetic mean value.
......
GB/T 24981.1-2010
Test methods of long afterglow phosphors activated by rare earths Part 1. Determination of emission dominantpeak and chromaticity coordinates
ICS 77.120.99
H14
National Standards of People's Republic of China
Test methods of rare earth long afterglow phosphors
Part 1. Determination of emission peak and chromaticity coordinates
Part 1. Determinationofemissiondominantpeakandchromaticitycoordinates
Issued on. 2010-08-09
2011-05-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
GB/T 24981 "rare earths long afterglow phosphor Test Method" is divided into two parts.
--- Part 1. Determination of emission peak and chromaticity coordinates;
--- Part 2. Determination of relative brightness.
This is Part 1.
This part of the National Standardization Technical Committee rare and centralized.
This section is responsible for drafting. Dalian Luming Luminescent Technology Co., Ltd.
Participated in the drafting of this section. Hangzhou distance Photoelectric Information Co., Ltd., Shanghai Yuelong New Materials Co., Ltd., Sichuan Sony source
Ltd., Guangzhou Nonferrous Metal Research Institute, Changzhou City Xinyuan Rare Earth Luminescent Materials Co., Ltd.
The main drafters of this section. Cao Yingling, Xia Wei, Qu Zhibo, Xiao Zhiguo, Zhang Hongwei, in crystal Jie.
The drafters of some of the participants. Pan Jiangen, Hui-new, Zhang, Nihai Yong, Wang.
Test methods of rare earth long afterglow phosphors
Part 1. Determination of emission peak and chromaticity coordinates
1 Scope
This section GB/T 24981 specifies the method for the determination of rare earth long afterglow phosphor emission peak and chromaticity coordinates.
This section applies to the determination of rare earth long afterglow phosphor and the chromaticity coordinates of the peak emission.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this part. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this section, however, encourage the parties to this part of the research agreement
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this section.
CIE1931 standard colorimetric observer
3 PRINCIPLE OF THE METHOD
Xenon lamp as an excitation light source of illumination directly applied to the sample to a predetermined, after a predetermined period of time off xenon lamp excitation, measured in a sample
Afterglow relative spectral fluorescence over the entire visible light (380nm ~ 780nm) emitted by power distribution, access to the main emission peak of the sample
Value wavelength; according to CIE colorimetric formula from the measured relative spectral power distribution is calculated afterglow fluorescence emitted by the sample sit chromaticity
Standard to characterize light color.
4 instruments and apparatus
4.1 illuminance testing device
4.1.1 Measuring range. 10lx ~ 1 × 105lx, light meter accuracy to meet the national requirement level.
4.1.2 Metering sensitive probe of the photosensitive surface diameter. 8mm ~ 12mm.
4.1.3 Illumination. irradiating the surface of the test specimen took a position of illumination are within 1000lx ± 5lx range.
4.2 excitation light source
Color temperature 5500K ~ 6500K, color rendering index greater than 95 quartz bulb xenon lamp, ultraviolet B band, A band and even the visible region
Continued spectrum, every 10min light output stability better than 1% throughout the life meet those requirements.
4.3 emission peak and chromaticity coordinates of the test device
4.3.1 chromaticity coordinate accuracy. ± 0.003.
4.3.2 Spectral range. 380nm ~ 780nm.
4.3.3 Wavelength accuracy. ± 0.5nm.
4.4 Sample Tray
Sample tray is black, diameter 45mm ± 5mm, depth of 5mm ± 2mm. Material not affect the spectral characteristics of the excitation light source
And spectroscopic properties of rare earth long afterglow phosphor.
5 test procedure
5.1 Test Conditions
5.1.1 Ambient temperature. 22 ℃ ~ 27 ℃.
5.1.2 Relative humidity. ≤70%.
......
| Standard ID | GB/T 24981.1-2020 (GB/T24981.1-2020) | | Description (Translated English) | Test methods of rare earth long afterglow phosphors - Part 1: Determination of emission dominantpeak and chromaticity coordinates | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H14 | | Classification of International Standard | 77.120.99 | | Word Count Estimation | 5,562 | | Date of Issue | 2020-11-19 | | Date of Implementation | 2021-10-01 | | Older Standard (superseded by this standard) | GB/T 24981.1-2010 | | Drafting Organization | Guangdong Rare Metal Research Institute, Youyan Rare Earth New Materials Co., Ltd., Jiangsu Borui Optoelectronics Co., Ltd., Peking University, Tianjin Dongfang Kejie Technology Co., Ltd., Xiamen University | | Administrative Organization | National Rare Earth Standardization Technical Committee (SAC/TC 229) | | Regulation (derived from) | National Standard Announcement No. 26 of 2020 | | Proposing organization | National Rare Earth Standardization Technical Committee (SAC/TC 229) | | Issuing agency(ies) | State Administration for Market Regulation, National Standardization Administration | | Standard ID | GB/T 24981.1-2010 (GB/T24981.1-2010) | | Description (Translated English) | Test methods of long afterglow phosphors activated by rare earths. Part 1: Determination of emission dominantpeak and chromaticity coordinates | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H14 | | Classification of International Standard | 77.120.99 | | Word Count Estimation | 5,564 | | Date of Issue | 2010-08-09 | | Date of Implementation | 2011-05-01 | | Quoted Standard | CIE 1931 | | Drafting Organization | Dalian Luming Luminescent Technology Corporation | | Administrative Organization | Rare National Standardization Technical Committee | | Regulation (derived from) | National Standard Approval Announcement 2010 No.3 (Total No.158) | | Proposing organization | National Rare Earth Standardization Technical Committee | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, China National Standardization Administration Committee | | Summary | This standard specifies the method for the determination of rare earth phosphor afterglow emission peak and chromaticity coordinates. This section applies to the determination of rare earth long afterglow phosphors and the chromaticity coordinates of the peak emission. |
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