Search result: GB/T 43750-2024
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Test method of magnetic properties of isotropic rare-earth permanent magnetic powder
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GB/T 43750-2024
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| Standard ID | GB/T 43750-2024 (GB/T43750-2024) | | Description (Translated English) | Test method of magnetic properties of isotropic rare-earth permanent magnetic powder | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H65 | | Classification of International Standard | 77.120.99 | | Word Count Estimation | 14,166 | | Date of Issue | 2024-03-15 | | Date of Implementation | 2024-10-01 | | Administrative Organization | National Rare Earth Standardization Technical Committee (SAC/TC 229) | | Proposing organization | National Rare Earth Standardization Technical Committee (SAC/TC 229) | | Issuing agency(ies) | State Administration for Market Regulation, National Standardization Administration |
GB/T 43750-2024.Measurement method of magnetic properties of isotropic rare earth bonded permanent magnet powder
ICS 77.120.99
CCSH65
National Standards of People's Republic of China
Measurement method of magnetic properties of isotropic rare earth bonded permanent magnet powder
Released on 2024-03-15
2024-10-01 Implementation
State Administration for Market Regulation
The National Standardization Administration issued
Preface
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 and coordinated by the National Rare Earth Standardization Technical Committee (SAC/TC229).
This document was drafted by. YUYAN Rare Earth New Materials Co., Ltd., China Institute of Metrology, Beijing Zhongke Sanhuan High-tech Co., Ltd.
Co., Ltd., Baotou Kerui Micromagnetic New Materials Co., Ltd., Jiangxi Zhongshi New Materials Co., Ltd., Guohe General Testing Evaluation Certification Co., Ltd.
Ningbo Metrology and Testing Institute, Ganzhou Comprehensive Inspection and Testing Institute, Hangzhou Qianshi Technology Co., Ltd., and China Iron and Steel Research Institute Co., Ltd.
Baotou Rare Earth Research Institute, Baotou Yingsite Rare Earth New Materials Co., Ltd., Youyan Rare Earth (Rongcheng) Co., Ltd., Zhejiang Yingluohua Magnetics
Co., Ltd. and Hangzhou Quadrant Technology Co., Ltd.
The main drafters of this document are. Yan Wenlong, Hou Ruifen, Peng Haijun, Luo Yang, Wang Zilong, Quan Ningtao, Yang Yuanfei, Yu Dunbo, Chen Zhian, He Jian,
Chen Haibo, Lin Jirong, Lu Shuo, Shi Jianghuan, Zeng Jiping, Shen Senqi, Zhao Ningning, Zhang Hongbin, Wu Kaiwen, Cui Shuai, Ma Yuehua, Lin Xiao, Zhu Minggang,
Liu Tao, Fu Jianlong, Duan Jiping, Ma Chunru, He Jianfeng, Fan Caixiang, Wang Xin, Zhai Yanan, Zhao Yi, Zhu Shengjie, Ji Xiaofeng.
Measurement method of magnetic properties of isotropic rare earth bonded permanent magnet powder
1 Scope
This document describes the closed-circuit diagram of the main magnetic properties of isotropic rare earth permanent magnet powder, including remanence, magnetic induction coercivity, intrinsic coercivity, and maximum magnetic energy product.
Measurement methods.
This document is applicable to the measurement of the main magnetic properties of isotropic NdFeB permanent magnet powder and SmFeN permanent magnet powder.
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 2900.4 Electrical terminology Electrical alloys
GB/T 2900.60 Electrical terminology - Electromagnetism
GB/T 3217 Magnetic test methods for permanent magnetic (hard magnetic) materials
GB/T 8170 Rules for rounding off values and expression and determination of limit values
GB/T 9637 Electrical terminology magnetic materials and components
GB/T 27418-2017 Evaluation and expression of measurement uncertainty
JJF1829 Calibration specification for magnetic measuring instruments for permanent magnetic materials
3 Terms and definitions
The terms and definitions defined in GB/T 2900.4, GB/T 2900.60, GB/T 3217 and GB/T 9637 and the following terms and definitions apply to this
document.
3.1
Aeff
After the powder is pressed into a cylindrical test sample, the area of the circular cross-section of the equivalent non-porous dense sample is obtained by calculation.
3.2
effectivediameter
deff
After the powder is pressed into a cylindrical test sample, the diameter of the circular cross-section of the equivalent non-porous dense sample is obtained by calculation.
3.3
ρt
The density of a powder material in a non-porous state.
4 Method Summary
The magnetic field strength is measured by using an H coil with a corresponding H induction voltage integrator, and the magnetic polarization strength is measured by using a J coil with a corresponding J induction voltage integrator.
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