GB/T 43881-2024 English PDF

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GB/T 43881-2024: Test method for linear thermal expansion of low-expansion glass - Laser interferometry
Status: Valid

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Basic data

Standard ID: GB/T 43881-2024 (GB/T43881-2024)
Description (Translated English): Test method for linear thermal expansion of low-expansion glass - Laser interferometry
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: Q30
Classification of International Standard: 81.040.01
Word Count Estimation: 14,199
Date of Issue: 2024-04-25
Date of Implementation: 2024-11-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 43881-2024: Test method for linear thermal expansion of low-expansion glass - Laser interferometry

---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 81:040:01 CCSQ30 National Standards of People's Republic of China Test method for linear thermal expansion coefficient of low expansion glass Laser interferometry Laserinterferometry 2024-11-01 Implementation State Administration for Market Regulation The National Standardization Administration issued

Table of Contents

Preface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Principle 1 5 Test equipment 1 6 Sample 3 7 Test conditions 3 8 Test Step 3 9 Data Processing 4 10 Test Report 4

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: 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 by China Building Materials Federation: 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 Building Materials Science Research Institute Co:, Ltd:, Rainbow Group (Shaoyang) Special Glass Co:, Ltd:, Bengbu China Optoelectronics Technology Co:, Ltd:, China National Testing Holding Group Co:, Ltd:, Beijing Space Electromechanical Research Institute, CNBM Quzhou Kingland Quartz Co:, Ltd:, Beijing Sinoma Artificial Crystal Research Institute Co:, Ltd: The main drafters of this document are: Nie Lanjian, Zhang Chenyang, Hui Shuang, Xue Xinjian, Cao Zhiqiang, Sun Shijun, Zhang Zemin, Chen Yaxin, Fu Bo, Wang Jingxia, Liu Ruiwang, Zhou Jianxin, Fan Shigang, Yang Xuedong, Qin Jianhong, Shao Zhufeng, Wang Hui, Wang Lei, Jia Yanan, Shen Yuguo, Li Na, Wang Hongjie, Hua Ning, Sui Meishen: Test method for linear thermal expansion coefficient of low expansion glass Laser interferometry

1 Scope

This document specifies the principle, test device, test specimen, test strips and test methods for testing the linear thermal expansion coefficient of low expansion glass using the laser interferometry method: parts, test procedures, data processing, and test reports: This document is applicable to low expansion glass (such as low expansion quartz glass, low expansion microcrystalline) with a linear thermal expansion coefficient of no more than 10-7/℃ Glass and high-purity quartz glass, etc:) linear thermal expansion coefficient testing, other linear thermal expansion coefficient materials are used for reference:

2 Normative references

The 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 1216 Outside Micrometer GB/T 21389 Vernier, dial and digital calipers

3 Terms and definitions

The following terms and definitions apply to this document: 3:1 Low-expansion glass Within a certain temperature range (the maximum temperature in this document does not exceed 500°C), the average linear thermal expansion coefficient is not greater than 10-7/°C Glass:

4 Principle

Based on the low expansion glass sample and reference material under heating conditions, the Michelson laser interferometer thermal expansion instrument was used to measure the low expansion glass sample: The length change of the sample is calculated based on the change of the interference fringes, and then the average linear heat is calculated based on the temperature range and instantaneous temperature: Coefficient of expansion or instantaneous coefficient of linear thermal expansion at a specific temperature:

5 Experimental equipment

5:1 Michelson Laser Interferometer Dilatometer 5:1:1 Sample holder, sample ejector rod, reference ejector rod The sample holder, sample push rod and reference push rod are all made of the same grade of annealed quartz glass: The sample push rod and the reference push rod are both hollow structures with a vacuum inside: The inner wall at the lower end of the push rod is plated with a reflective layer: ......

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