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GB/T 24980-2020: Rare earth long afterglow phosphors
Status: Valid GB/T 24980: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 24980-2020 | English | 209 |
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Rare earth long afterglow phosphors
| Valid |
GB/T 24980-2020
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| GB/T 24980-2010 | English | 279 |
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Long afterglow phosphors activated by rare earths
| Obsolete |
GB/T 24980-2010
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PDF similar to GB/T 24980-2020
Basic data | Standard ID | GB/T 24980-2020 (GB/T24980-2020) | | Description (Translated English) | Rare earth long afterglow phosphors | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H65 | | Classification of International Standard | 77.120.99 | | Word Count Estimation | 11,140 | | Date of Issue | 2020-11-19 | | Date of Implementation | 2021-10-01 | | Older Standard (superseded by this standard) | GB/T 24980-2010 | | Regulation (derived from) | National Standard Announcement No. 26 of 2020 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 24980-2020: Rare earth long afterglow phosphors---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.
Rare earth long afterglow phosphors
ICS 77.120.99
H65
National Standards of People's Republic of China
Replace GB/T 24980-2010
Rare earth long afterglow phosphor
2020-11-19 released
2021-10-01 implementation
State Administration for Market Regulation
Issued by the National Standardization Management Committee
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 24980-2010 "Rare Earth Long Afterglow Phosphors", compared with GB/T 24980-2010, except for editorial changes
The main technical changes are as follows.
---Modified the application fields of rare earth long afterglow phosphors in the scope (see Chapter 1, Chapter 1 of the.2010 edition);
--- The term "standard phosphor" is deleted, and the subsequent serial numbers are adjusted sequentially (see 3.2 in the.2010 edition);
---Modified the definition of "luminous color" (see 3.2, 3.3 in.2010 edition);
---Modified the term "relative brightness" to "afterglow brightness" (see 3.3, 3.4 in.2010 edition);
--- Deleted the term "particle size distribution" (see 3.5 in the.2010 edition);
---Modified "product classification and brand" to "product classification and reference composition" and the corresponding content, deleted the conventional alkaline earth aluminate
Level three (see 4.1, 4.1 in.2010 edition);
---Added the division and expression of product brands (see 4.2);
---Modified product technical indicators and expression methods, the center particle size range of each brand, the chromaticity coordinate x, y value and emission of each brand
The main peak value, respectively, put forward the requirements of alkaline earth aluminate, silicate and sulfur oxide (see 5.1.1, 5.1.2, 5.1.3, 4.1 in.2010 edition);
--- Modified the sieving particle size distribution and sieving particle size range of alkaline earth aluminate granular products (see 5.1.1, Appendix A,.2010 edition 5.3);
---Modified the requirements of appearance quality and added different luminous colors (yellow-green, blue-green, blue, orange-red) long afterglow powder appearance
Description of the color (see 5.2, 4.2 of the.2010 edition);
---Modified the "test method" (see Chapter 6, Chapter 4 of the.2010 edition);
---The determination of particle size distribution has been deleted, and a normative appendix A has been added (see 5.3 of the.2010 edition);
---Modified the acceptance questioning time, adjusted from 3 months to 1 month (see 7.1.2,.2010 version 6.1.2).
This standard was proposed and managed by the National Rare Earth Standardization Technical Committee (SAC/TC229).
Drafting organizations of this standard. Guangdong Rare Metal Research Institute, Jiangsu Borui Optoelectronics Co., Ltd., Research Rare Earth New Materials Co., Ltd.,
Xiamen University, Baotou Rare Earth Research Institute, Peking University.
The main drafters of this standard. Ding Jianhong, Li Xubo, Ni Haiyong, Liang Chao, Liu Yuanhong, Li Yanfeng, Zhuang Yixi, Wang Zhongzhi, Guan Yan, Zhang Qiuhong,
Fu Yibing.
The previous versions of the standard replaced by this standard are as follows.
---GB/T 24980-2010.
Rare earth long afterglow phosphor
1 Scope
This standard specifies the technical requirements, test methods, inspection rules, signs, packaging, transportation, storage and quality certification of rare earth long afterglow phosphors
Ming book.
This standard is applicable to the rare earth long afterglow fluorescence of aluminate system, silicate system and sulfur oxide system prepared by high temperature solid phase reaction
Powder, mainly used for emergency signs and escape signs in the field of fire protection, low-light indications in the plastic, ink, and ceramic industries, and dark vision rings such as outdoors and roads.
Indications and low-light lighting under circumstances.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article
Pieces. For undated references, the latest version (including all amendments) applies to this document.
GB/T 8170 Numerical rounding rules and the expression and determination of limit values
GB/T 15676 Rare earth terms
GB/T 20170.1-2006 Test methods for physical properties of rare earth metals and their compounds Determination of particle size distribution of rare earth compounds
GB/T 24981 (all parts) Test method for rare earth long afterglow phosphors
3 Terms and definitions
The following terms and definitions defined in GB/T 15676 apply to this document.
3.1
Rare earths that can absorb and store light energy when excited by ultraviolet or visible light. After the light excitation stops, it can continue to emit visible light for a long time.
Ion activated phosphor.
3.2
Luminous color
The fluorescent color emitted when excited by ultraviolet light or visible light is characterized by chromaticity coordinates and calculated with reference to the CIE1931 color measurement system.
3.3
Afterglow brightness
After the excitation is stopped, the luminous brightness of the phosphor to be tested at the specified afterglow test time point.
4 categories
4.1 Product system, category, reference component and excitation light source and afterglow brightness test light source illuminance
4.1.1 The products are divided into three systems of alkaline earth aluminate, silicate, and sulfur oxide according to their chemical composition.
Luminance test light source illuminance is divided into three categories. conventional type, granular type, and low-light type. For each product system and code, category and reference components, see Table 1.
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