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GB/T 43870.2-2024: Measurement methods for Curie temperature of magnetic materials - Part 2: Soft magnetic materials
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Measurement methods for Curie temperature of magnetic materials - Part 2: Soft magnetic materials
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GB/T 43870.2-2024
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Basic data | Standard ID | GB/T 43870.2-2024 (GB/T43870.2-2024) | | Description (Translated English) | Measurement methods for Curie temperature of magnetic materials - Part 2: Soft magnetic materials | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | L19 | | Classification of International Standard | 29.030 | | Word Count Estimation | 14,138 | | 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 43870.2-2024: Measurement methods for Curie temperature of magnetic materials - Part 2: Soft magnetic materials
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ICS 29:030
CCSL19
National Standards of People's Republic of China
Measuring Method of Curie Temperature of Magnetic Materials
Part 2: Soft 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 How to determine the Curie temperature 1
5 Measurement of Curie temperature 2
5:1 LT Curve Method 2
5:1:1 Measurement principle and method 2
5:1:2 Measuring device 2
5:1:3 Sample 3
5:1:4 Coil 3
5:1:5 Measurement procedure 3
5:1:6 Data Processing 4
5:2 mT Curve Method 4
6 Results Report 4
Appendix A (Informative) Typical Curie Temperature Values of Common Soft Magnetic Materials 5
Figure 1 LT curve and Curie temperature TC diagram 2
Figure 2 Schematic diagram of LT curve method measurement device 3
Table A:1 Typical values of Curie temperature of common soft magnetic materials 5
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 2 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, Zhejiang Province
Institute of Metrology, Hengdian Group DMEGC Co:, Ltd:, and Changsha Tianheng Measurement and Control Technology Co:, Ltd:
The main drafters of this document are: Ge Hongliang, Wu Qiong, Yan Chong, Peng Qinggui, Gong Wenjie, Yu Zhishu, Zhou Xinhua, Zhang Aiguo, Lei Guoli, Wang Zisheng,
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 2: Soft magnetic materials
1 Scope
This document describes a method for the measurement of the Curie temperature of soft magnetic materials:
This document is applicable to the measurement of Curie temperature of ferrite soft magnetic materials and metal soft magnetic 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 28869:1-2012 Measurement methods for cores made of soft magnetic materials Part 1: General specifications
GB/T 28869:2-2023 Measurement methods for cores made of soft magnetic materials Part 2: Magnetic properties at low excitation levels
GB/T 43870:1 Methods for measuring the Curie temperature of magnetic materials Part 1: Permanent magnetic materials
JJF1101-2019 Environmental test equipment temperature and humidity parameter calibration specification
3 Terms and definitions
The terms and definitions defined in GB/T 2900:60 and GB/T 9637 apply to this document:
4 How to determine the Curie temperature
Measure the curve of inductance L changing with temperature T (LT curve) or the curve of magnetic moment m changing with temperature T (mT curve), L-
The tangent line at the point where the absolute value of the slope of the T curve or mT curve (dL/dT or dm/dT) is the maximum and L=L0 (L0 is the inductance of the air-core coil)
Or m=0 intersects the horizontal axis, and the temperature value here is the Curie temperature, as shown in Figure 1:
When the Curie temperature is not higher than 300℃, it is recommended to use the LT curve method; when the Curie temperature is higher than 300℃, it is recommended to use the mT curve method:
Line method:
The Curie temperature can also be determined in accordance with Chapter 14 of GB/T 28869:2-2023:
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