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GB/T 45822-2025Transparent glass-ceramics for mobile display cover (English PDF)

移动显示盖板用透明微晶玻璃

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

August 1, 2025

Implementation date

February 1, 2026

Scope

GB/T 45822-2025 is the English-translated version of 移动显示盖板用透明微晶玻璃.

GB/T 45822-2025 is the Chinese national standard covering the crystallised cover glass on a phone screen, chemically strengthened before it ships — the material and its refractive index, photoelastic constant, elastic modulus and fracture toughness, the requirements on light transmittance, haze, colour and surface roughness, the scratch resistance measured against a graded abrasive, which decides whether the cover survives a pocket with sand in it, the inspection rules, and the packaging, marking, transport and storage. First edition, under the China Building Materials Federation. In force from 1 February 2026. Issued on 1 August 2025, it has been in force since 1 February 2026.

Document preview — GB/T 45822-2025

National Standard of the People's Republic of China

ICS: 81.040.30
Classification: Q 34

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Foreword
1 Scope
2 Normative references
3 Terms and Definitions
3.1 Transparent glass-ceramics
4 Materials

Foreword

This 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 proposed by China Building Materials Federation.

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 is under the jurisdiction of the National Technical Committee for Standardization of Industrial Glass and Special Glass (SAC/TC447).

This document was drafted by: China National Testing and Inspection Holding Group Co., Ltd., Chongqing Xinjing Special Glass Co., Ltd., Rainbow Display Co., Ltd., Zhejiang Rock Optoelectronics Technology Co., Ltd., Chengdu Guangming Optoelectronics Co., Ltd., China Building Material Glass New Materials Research Research Institute Group Co., Ltd., Zhuzhou Kibing Group Co., Ltd., Chengdu Tomi Shuangdu Optoelectronics Co., Ltd., Hangzhou Qianzhi Kunda New Materials Science and Technology Co., Ltd.

Technology Co., Ltd., Wuhan University of Technology, Xiaomi Communication Technology Co., Ltd., Zhejiang Parkson Optoelectronics Technology Co., Ltd., Hubei Lianxin Display Technology Co., Ltd.

Co., Ltd., China National Building Materials International Engineering Group Co., Ltd., Rainbow Group Co., Ltd., Hubei Gebiga Optoelectronics Technology Co., Ltd., Changshu Jia He Display Technology Co., Ltd., Sichuan Hongke Innovation Technology Co., Ltd., Shenzhen New Century Tuojia Optoelectronics Technology Co., Ltd., and Vidali Technology Co., Ltd., Beijing University of Technology.

The main drafters of this document are: Li Junjie, Liu Yaru, Ding Zuoxin, Shi Lin, Wang Li, Han Song, Zhou Jingpeng, Li Miao, Pan Fanglin, Liu Zhenyu, Jiang Tao, Sun Shizhong, Li Yaohui, Wei Xinying, Cheng Junhua, Lu Ping, Wang Ting, Tan Baoquan, Chen Shixing, Huang Jun, Liu Yaolong, Chu Jingyuan, Li Zipei, Zhang Ke, Zhang Fujun, Xu Guoliang, Zhang Kun, Xu Ren, Tian Yingliang, Yuan Jian, Zhao Wenjing, Yang Pingping, Shi Yan, Xu Wei, Zhang Yuqi, Tu Hao, Li Xinyi, Bao Ji, Yin Qiaoyun, Yang Xuedong, Du Dayan.

Transparent glass-ceramic for mobile display cover

1 Scope

This document specifies the materials, requirements, inspection rules, packaging, marking, transportation and storage of transparent microcrystalline glass for mobile display cover.

The corresponding test methods are described.

This document applies to the production, inspection, delivery and acceptance of chemically strengthened transparent glass-ceramics for mobile display cover panels.

2 Normative references

GB/T 2410

GB/T 2680

GB/T 9258.2

GB/T 11942-2022

GB/T 31958-2023

GB/T 32642

GB/T 36259

GB/T 37900

GB/T 39815-2021

3 Terms and Definitions

The terms and definitions defined in GB/T 36259 and the following apply to this document.

3.1 Transparent glass-ceramics

Glass with a specific composition is obtained by controlling crystallization to obtain a transparent material in which a microcrystalline phase and a glass phase coexist.

4 Materials

Before chemical strengthening, the refractive index, photoelastic constant, elastic modulus and fracture toughness of transparent microcrystalline glass should be tested according to the provisions of Appendix A.

The refractive index and photoelastic constant shall be determined by the supplier and the buyer. The elastic modulus shall be no less than 90GPa and the fracture toughness shall be no less than 0.9MPa-m1/2.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 2410 · GB/T 9258.2 · GB/T 32642

Editions of GB/T 45822

Edition	Title	Revision	Status
GB/T 45822-2025	Transparent glass-ceramics for mobile display cover	current edition	Current

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