HOME   Cart(0)   Quotation   About-Us Tax PDFs Standard-List Powered by Google www.ChineseStandard.net Database: 189759 (10 Nov 2024)

GB/T 24981.1-2020 Related PDF English (GB/T 24981.1-2010)

GB/T 24981.1-2020 (GB/T24981.1-2020, GBT 24981.1-2020, GBT24981.1-2020) & related versions
Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)See DetailStatusSimilar PDF
GB/T 24981.1-2020English95 Add to Cart 0-9 seconds. Auto delivery. Test methods of rare earth long afterglow phosphors - Part 1: Determination of emission dominantpeak and chromaticity coordinates GB/T 24981.1-2020 Valid GBT 24981.1-2020
GB/T 24981.1-2010English199 Add to Cart 2 days Test methods of long afterglow phosphors activated by rare earths -- Part 1: Determination of emission dominant peak and chromaticity coordinates GB/T 24981.1-2010 Obsolete GBT 24981.1-2010
Buy with any currencies (Euro, JPY, KRW...): GB/T 24981.1-2020    Preview this PDF: GB/T 24981.1-2020



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%. ......

BASIC DATA
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

BASIC DATA
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.