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GB/T 8722-2019: Test method for thermal conductivity of carbon materials
Status: Valid GB/T 8722: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 8722-2019 | English | 199 |
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3 days [Need to translate]
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Test method for thermal conductivity of carbon materials
| Valid |
GB/T 8722-2019
|
| GB/T 8722-2008 | English | 279 |
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Method for the determination of thermal conductivity of graphite materials at median temperature
| Obsolete |
GB/T 8722-2008
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| GB/T 8722-1988 | English | 199 |
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2 days [Need to translate]
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Method for the determination of thermal conductivity of graphite materials at median temperature
| Obsolete |
GB/T 8722-1988
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PDF similar to GB/T 8722-2019
Standard similar to GB/T 8722-2019 GB/T 3518 GB/T 3521 GB/T 24533 GB/T 3520 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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