GB/T 8722-2019 English PDF

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GB/T 8722-2019: Test method for thermal conductivity of carbon materials
Status: Valid

GB/T 8722: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 8722-2019	199	Add to Cart	3 days	Test method for thermal conductivity of carbon materials	Valid
GB/T 8722-2008	279	Add to Cart	3 days	Method for the determination of thermal conductivity of graphite materials at median temperature	Obsolete
GB/T 8722-1988	199	Add to Cart	2 days	Method for the determination of thermal conductivity of graphite materials at median temperature	Obsolete

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Basic data

Standard ID: GB/T 8722-2019 (GB/T8722-2019)
Description (Translated English): Test method for thermal conductivity of carbon materials
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: Q51
Classification of International Standard: 29.050
Word Count Estimation: 10,126
Date of Issue: 2019-12-10
Date of Implementation: 2020-07-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 8722-2019: Test method for thermal conductivity of carbon materials

---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.
(Method for determining thermal conductivity of carbon materials) ICS 29.050 Q51 National Standards of People's Republic of China Replaces GB/T 8722-2008 Method for determining thermal conductivity of carbon materials 2019-12-10 release 2020-07-01 implementation State Administration of Market Supervision Published 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 8722-2008 "Method for determination of medium-temperature thermal conductivity of graphite materials". Ratio, the main technical content changes are as follows. --- Added terms and definitions (see Chapter 3); --- Increased the direction of longitudinal heat flow sample sampling (see 4.4.1); --- Modified the number of measurements of longitudinal heat flow test (see 4.5.6, 6.6 of the.2008 version); --- Added flash method (see Chapter 5); --- Modified the contents of the test report (see Chapter 6, Chapter 9 of the.2008 edition). This standard is proposed by China Iron and Steel Industry Association. This standard is under the jurisdiction of the National Steel Standardization Technical Committee (SAC/TC183). This standard was drafted. China Steel Group New Materials (Zhejiang) Co., Ltd., China Pingmei Shenma Group Kaifeng Carbon Co., Ltd., Changzhou Xinneng Material Inspection Co., Ltd., Shanxi Jinyang Carbon Co., Ltd., Datong Yulinde Graphite New Materials Co., Ltd., Metallurgical Industry Institute of Information Standards. The main drafters of this standard. Huang Yan, Yang Hui, Zheng Jingxu, Xu Jianping, Mao Yuzhen, Chen Wenlai, Wan Jianmin, Wu Jianguo, Zhang Huibing, Kang Jincai, Chi Yide, Duan Xueliang, Yang Jiqing. The previous versions of the standards replaced by this standard are. --- GB/T 8722-1988, GB/T 8722-2008. Method for determining thermal conductivity of carbon materials

1 Scope

This standard specifies the terms and definitions of thermal conductivity of carbon materials, principles, equipment, sample requirements, test procedures, calculation of results, and tests. Reports, etc. This standard applies to the determination of the thermal conductivity of carbon materials.

2 Normative references

The following documents are essential for the application of this document. For dated references, only the dated version applies to this article Pieces. For undated references, the latest version (including all amendments) applies to this document. GB/T 1427 Carbon material sampling method GB/T 8170 Numerical rounding rules and expression and judgment of limit values

3 terms and definitions

The following terms and definitions apply to this document. 3.1 Thermal conductivity The heat transferred through the unit area of the material along the heat flow direction under the unit temperature gradient per unit time, which is used to characterize the thermal conductivity of the material ability. 4 Method 1. Longitudinal heat flow method 4.1 Scope It is suitable for the measurement of thermal conductivity of bulk carbon materials at 100 ℃ ~ 800 ℃. 4.2 Principle Directly energized longitudinal heat flow method. When a cylindrical sample passes DC, the heat generated is mainly conducted along the longitudinal direction of the sample to both ends. Reach After thermal stability, it is considered that there is one-dimensional longitudinal heat flux on the sample, and the heat exchange between the sample and the lateral environment is corrected. 4.3 Equipment 4.3.1 Micrometer. range is 0mm ~ 25mm, accuracy is 0.01mm. 4.3.2 Vernier caliper. Accuracy is 0.02mm. 4.3.3 Ni-Cr-Ni-Si armored thermocouple. bare type. Thermocouple wire diameter 0.4mm ~ 0.5mm. 4.3.4 Precision digital temperature display instrument. resolution 0.1 ℃, accuracy ± 1.3%. 4.3.5 DC digital voltmeter. resolution 0.001mV, accuracy ± 0.006%. 4.3.6 Fixed value shunt. 500A/75mV, class 0.2, with DC millivolt meter with corresponding accuracy. Or the digital voltmeter specified in 4.3.5. ......

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