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Measurement methods for Curie temperature of magnetic materials - Part 1: Permanent magnetic materials
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Basic data
| Standard ID | GB/T 43870.1-2024 (GB/T43870.1-2024) |
| Description (Translated English) | Measurement methods for Curie temperature of magnetic materials - Part 1: Permanent magnetic materials |
| Sector / Industry | National Standard (Recommended) |
| Classification of Chinese Standard | L19 |
| Classification of International Standard | 29.030 |
| Word Count Estimation | 18,176 |
| 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 43870.1-2024: Measurement methods for Curie temperature of magnetic materials - Part 1: Permanent magnetic 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.
ICS 29:030
CCSL19
National Standards of People's Republic of China
Measuring Method of Curie Temperature of Magnetic Materials
Part 1: Permanent magnetic materials
Released on 2024-04-25
2024-11-01 Implementation
State Administration for Market Regulation
The National Standardization Administration issued
Table of Contents
Preface III
Introduction IV
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Determination of Curie temperature measurement 1
5 Measurement of Curie temperature 2
5:1 Vibrating sample (coil) magnetometer method 2
5:1:1 Measurement principle 2
5:1:2 Sample 2
5:1:3 Measuring device 2
5:1:4 Standard sample 3
5:1:5 Measurement procedure 3
5:1:6 Data Processing 4
5:2 Magnetic weighing method 4
5:2:1 Measurement principle 4
5:2:2 Sample 5
5:2:3 Measuring device 5
5:2:4 Standard samples 6
5:2:5 Measurement procedure 6
5:2:6 Data processing 7
5:3 Pull-out method 7
5:3:1 Measurement principle 7
5:3:2 Sample 7
5:3:3 Measuring device 7
5:3:4 Measurement procedure 8
5:3:5 Data Processing 9
6 Results Report 9
Appendix A (Informative) Typical Curie Temperature Values of Common Permanent Magnetic Materials10
Reference 11
Figure 1 mT curve and Curie temperature TC diagram 1
Figure 2 Schematic diagram of the vibrating sample magnetometer measurement device 3
Figure 3 Schematic diagram of the magnetic weighing measurement device (the magnetization device is an electromagnet)
Figure 4 Schematic diagram of the pull-out method measurement device 8
Table A:1 Typical values of Curie temperature of common permanent magnet materials10
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 part 1 of GB/T 43870 "Measurement method of Curie temperature of magnetic materials": GB/T 43870 has been published in
Lower part:
--- Part 1: Permanent magnetic materials;
--- Part 2: Soft magnetic materials:
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 the Ministry of Industry and Information Technology of the People's Republic of China:
This document is under the jurisdiction of the National Technical Committee for Standardization of Magnetic Components and Ferrite Materials (SAC/TC89):
This document was drafted by: China University of Metrology, the Ninth Institute of China Electronics Technology Group Corporation, China Institute of Metrology, Beijing Mining Magnetics
Materials Technology Co:, Ltd:, Zhejiang Institute of Metrology, Changsha Tianheng Measurement and Control Technology Co:, Ltd:, Hengdian Group Dongmei Co:, Ltd:,
Zhejiang Zhongke Magnetics Co:, Ltd:
The main drafters of this document are: Wu Qiong, Ge Hongliang, Wang Zisheng, Peng Qinggui, Gong Wenjie, Liu Rongming, Yu Zhishu, Zhou Xinhua, He Zhenyu,
Huang Yihong, Pan Minxiang, Yang Hangfu, and Yu Nengjun:
Introduction
Curie temperature is the transition temperature of the internal magnetic moment of ferromagnetic/ferrimagnetic materials from order to disorder, that is, the transition temperature between ferromagnetism/ferrimagnetism and order:
The temperature at which magnetic properties change is one of the basic characteristics of ferromagnetic materials: Curie temperature measurement is part of magnetic property measurement:
GB/T 43870 "Measurement method of Curie temperature of magnetic materials" consists of two parts:
--- Part 1: Permanent magnetic materials: The purpose is to specify the measurement method of the Curie temperature of permanent magnetic materials:
--- Part 2: Soft magnetic materials: The purpose is to specify the measurement method of Curie temperature of soft magnetic materials:
Measuring Method of Curie Temperature of Magnetic Materials
Part 1: Permanent magnetic materials
1 Scope
This document describes a method for measuring the Curie temperature of permanent magnetic materials:
This document is applicable to the measurement of Curie temperature of AlNiCo permanent magnets, ferrite permanent magnets, FeCrCo permanent magnets, rare earth permanent magnets and other permanent magnet materials:
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 2900:60 Electrical terminology - Electromagnetism
GB/T 9637 Electrical terminology magnetic materials and components
GB/T 38437-2019 Method for measuring the magnetic dipole moment of ferromagnetic material samples by pulling or rotating
3 Terms and definitions
The terms and definitions defined in GB/T 2900:60 and GB/T 9637 apply to this document:
4 Determination of Curie temperature measurement value
The curve of the change of magnetic moment m with temperature T (mT curve) is measured: The tangent line at the point where the absolute value of the slope (dm/dT) of the curve is the maximum is parallel to m=0:
The intersection of the horizontal axis, the temperature value here is the Curie temperature, as shown in Figure 1:
Index number description:
1---The tangent line passing through the point where the absolute value of dm/dT is the largest;
2---dm/dT absolute value maximum point:
dm/dT
Figure 1: mT curve and Curie temperature TC
...
