GB/T 23595.1-2025 English PDFUS$199.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 23595.1-2025: Test methods of rare earth phosphors for LED - Part 1: Determination of spectrum Status: Valid GB/T 23595.1: Historical versions
Basic dataStandard ID: GB/T 23595.1-2025 (GB/T23595.1-2025)Description (Translated English): Test methods of rare earth phosphors for LED - Part 1: Determination of spectrum Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: H65 Classification of International Standard: 77.120.99 Word Count Estimation: 10,144 Date of Issue: 2025-01-24 Date of Implementation: 2025-08-01 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 23595.1-2025: Test methods of rare earth phosphors for LED - Part 1: Determination of spectrum---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.ICS 77.120.99 CCSH65 National Standard of the People's Republic of China Replaces GB/T 23595.1-2009 Test methods for rare earth phosphors for LED Part 1.Determination of spectra Released on 2025-01-24 2025-08-01 Implementation State Administration for Market Regulation The National Standardization Administration issued ForewordThis document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. This document is part 1 of GB/T 23595 Test methods for rare earth phosphors for LEDs. GB/T 23595 has been published for the following part. --- Part 1.Determination of spectrum; --- Part 2.Determination of relative brightness; --- Part 3.Determination of chromaticity coordinates; --- Part 4.Determination of high temperature and high humidity performance; --- Part 5.Determination of pH value; --- Part 6.Determination of electrical conductivity; --- Part 7.Determination of thermal quenching properties; --- Part 8.Determination of high voltage accelerated aging performance. This document replaces GB/T 23595.1-2009 "Test methods for rare earth yellow phosphors for white light LED lamps Part 1.Spectral performance Compared with GB/T 23595.1-2009, in addition to structural adjustments and editorial changes, the main technical changes are as follows. a) Changed the scope of application from "440nm~480nm" to "350nm~480nm" (see Chapter 1,.2009 Edition) Chapter 1); b) Added terms and definitions (see Chapter 3); c) The principle of the method has been changed (see Chapter 4, Chapter 2 of the.2009 edition); d) The accuracy of the fluorescence spectrophotometer has been changed (see 5.1, 3.1 of the.2009 edition); e) The excitation spectrum measurement range has been changed (see 5.3, 3.3 of the.2009 edition); f) Added sample requirements (see Chapter 6) g) Added requirements for test environment (see Chapter 7); h) The test steps have been changed (see Chapter 8, Chapter 4 of the.2009 edition); i) The precision has been changed (see Chapter 10, Chapter 6 of the.2009 edition). Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document was proposed and coordinated by the National Rare Earth Standardization Technical Committee (SAC/TC229). This document was drafted by. YUYAN Rare Earth New Materials Co., Ltd., Jiangsu Borui Optoelectronics Co., Ltd., Jiangmen Keheng Industrial Co., Ltd. Co., Ltd., Guangdong Academy of Sciences Resource Utilization and Rare Earth Development Institute, Tianjin Baotou Steel Rare Earth Research Institute Co., Ltd., High-tech Co., Ltd., Xiamen Rare Earth Materials Research Institute, and Baotou Rare Earth Research Institute. The main drafters of this document are. Liu Ronghui, Liu Yuanhong, Chen Xiaoxia, Liang Chao, Huang Ruitian, Ni Haiyong, Tang Zongquan, Ding Jianhong, Wang Anli, Song Lijun, Liu Yayuan, Xie Shihui, Lin Fulin, Zhang Xia, Xu Huibing, Zhang Minghui, and Zhang Juan. This document was first published in.2009 and this is the first revision.IntroductionWith the continuous development of semiconductor lighting and display technology, higher requirements are placed on the performance of phosphors. The use of blue LED yellow phosphor has developed into the use of ultraviolet-blue LED blue-green/yellow/yellow-green/red phosphors, as well as blue LED green/red phosphors, including garnet structure aluminate yellow/yellow-green phosphors, nitride red phosphors, silicate LED rare earth phosphor products of mainstream systems such as salt green/yellow phosphor, nitrogen oxide blue-green phosphor, etc. are becoming more and more diverse. The comprehensive performance requirements of products are getting higher and higher, especially the new requirements for product reliability. With the upgrading of local phosphor products and technologies, it is necessary to establish a unified evaluation method that conforms to the existing technology. GB/T 23595 "Test methods for rare earth phosphors for LEDs" consists of 8 parts. --- Part 1.Determination of spectrum; --- Part 2.Determination of relative brightness; --- Part 3.Determination of chromaticity coordinates; --- Part 4.Determination of high temperature and high humidity performance; --- Part 5.Determination of pH value; --- Part 6.Determination of electrical conductivity; --- Part 7.Determination of thermal quenching properties; --- Part 8.Determination of high voltage accelerated aging performance. In recent years, with the development of semiconductor lighting technology, the number of phosphor systems has gradually increased, and its application areas have continued to expand, including ordinary color rendering, high Market segments such as color rendering, full spectrum, high-power lighting and general color gamut display require higher precision in the excitation and emission spectra of phosphors. In terms of spectrum testing instruments, the detection speed, measurement range, stability and measurement accuracy of phosphor samples have been significantly improved. The current national standard stipulates The test range, test accuracy and error cannot meet the actual application requirements. This document focuses on the expansion of the scope of application, test method The increase of light sources in the principle of the method and the upgrade of equipment accuracy have made the measurement steps and parameter requirements of the spectrum clearer. The test method improves the accuracy and applicability of product testing, which is helpful for domestic and foreign LED rare earth phosphor manufacturers and related industries Production guidance and usage specifications. Test methods for rare earth phosphors for LED Part 1.Determination of spectra1 ScopeThis document describes the method for determining the spectrum of rare earth phosphors for LEDs excited by ultraviolet to blue light with wavelengths from 350nm to 480nm. This document is applicable to the determination of the spectrum of rare earth phosphors for LEDs excited by ultraviolet light to blue light with a wavelength of 350nm~480nm.2 Normative referencesThe contents of the following documents constitute the essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. GB/T 5838.1 Phosphors Part 1.Terminology GB/T 8170 Rules for rounding off values and expression and determination of limit values3 Terms and definitionsThe terms and definitions defined in GB/T 5838.1 and the following apply to this document. 3.1 Excitation spectrum The intensity of a certain spectral line or spectral band of luminescence is distributed along with the wavelength or frequency of the excitation light. [Source. GB/T 5838.1-2015, 2.59, modified] 3.2 Emission spectrum emissionspectrum The distribution of the number of emitted photons or light (radiation) power by wavelength or frequency. [Source. GB/T 5838.1-2015, 2.63, modified] 3.3 λp The wavelength corresponding to the peak with the largest number of photons or light (radiation) power in the emission spectrum. [Source. GB/T 24982-2020, 3.5, modified]4 Principles of the methodUse a xenon lamp as the light source and split it with a monochromator, or use an LED monochromatic light source to excite the sample with light of a specific wavelength and then use a spectrum detector to Spectral scanning is performed to obtain the emission spectrum of the sample. Using a xenon lamp as the light source and a certain emission wavelength as the monitoring wavelength, different wavelengths of light are used for excitation. The spectrum detector is used to detect and obtain the excitation spectrum of the sample. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 23595.1-2025_English be delivered?Answer: Upon your order, we will start to translate GB/T 23595.1-2025_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. 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Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.Question 5: Should I purchase the latest version GB/T 23595.1-2025?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 23595.1-2025 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. |
