GB/T 24270-2009Method of measurement of temperature coefficient of magnetic properties of permanent magnetic materials (English PDF)
永磁材料磁性能温度系数测量方法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
June 19, 2009
Implementation date
February 1, 2010
Scope
GB/T 24270-2009 is the English-translated version of 永磁材料磁性能温度系数测量方法.
GB/T 24270-2009 is the Chinese standard "Method of measurement of temperature coefficient of magnetic properties of permanent magnetic materials". Its scope clause reads: This standard specifies the measurement method for the temperature coefficients of remanence and intrinsic coercivity of permanent magnetic materials in a closed magnetic circuit.
This standard is applicable to the measurement of the temperature coefficient of magnetic properties of various permanent magnetic materials. Its clauses include terms and definitions; measuring device; heating and temperature measuring device; test specimen; measurement methods; data processing; test report.
It was issued by the General Administration of Quality Supervision, Inspection and Quarantine on JUNE 19, 2009 and took effect on FEBRUARY 1, 2010.
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Document preview — GB/T 24270-2009
National Standard of the People's Republic of China
- ICS
- 29.030
- Classification
- K 14
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword3
- 1 Scope4
- 2 Normative references4
- 3 Terms and definitions4
- 4 Measuring device5
- 5 Heating and temperature measuring device6
- 6 Test specimen7
- 7 Measurement methods7
- 8 Data processing8
- 9 Test report8
- References9
1 Scope
This standard specifies the measurement method for the temperature coefficients of remanence and intrinsic coercivity of permanent magnetic materials in a closed magnetic circuit.
This standard is applicable to the measurement of the temperature coefficient of magnetic properties of various permanent magnetic materials.
2 Normative references
The clauses in the following documents become the clauses of this standard through reference in this standard. For all the referenced documents with dates, all the subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, the parties who reach an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For all the referenced documents without dates, the latest versions are applicable to this standard.
GB/T 3217-1992 Methods of test of the magnetic properties of permanent magnetic (magnetically hard) materials
GB/T 9637 Electrotechnical terminology - Magnetic materials and components
3 Terms and definitions
The terms and definitions established in GB/T 9637 and the following apply to this standard.
3.1 Temperature coefficient of remanence alpha(Br)
The ratio of the relative change in remanence due to temperature change to the temperature change. Where. alpha(Br) -- temperature coefficient of remanence, the unit is %/K; T1 -- basic temperature, the unit is Kelvin (K);
T2 -- the upper limit temperature of temperature change, the unit is Kelvin (K);
Br(T1) -- remanence at temperature T1, the unit is tesla (T);
Br(T2) -- remanence at temperature T2, the unit is tesla (T).
3.2 Temperature coefficient of intrinsic coercivity alpha(HcJ)
The ratio of the relative change in intrinsic coercivity due to temperature change to the temperature change. Where. alpha(HcJ) -- temperature coefficient of intrinsic coercivity, the unit is %/K; T1 -- basic temperature, the unit is Kelvin (K);
T2 -- the upper limit temperature of temperature change, the unit is Kelvin (K);
HcJ(T1) -- intrinsic coercivity at temperature T1, in ampere per meter (A/m);
HcJ(T2) -- intrinsic coercivity at temperature T2, in ampere per meter (A/m).
4 Measuring device
4.1 Closed magnetic circuit measuring device
The device for measuring the remanence Br and intrinsic coercivity HcJ in a closed magnetic circuit is shown in Figure 1. […]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
Normative references
Cited by
- GB/T 47009-2026Test method for the durability of rare earth permanent magnet materials under high temperature and a reversed magnetic field
- GB/T 47344-2026Durability test method for permanent magnets under multi-field coupling - Elevated temperature and reverse magnetic field
- GB/T 42668-2023Samarium-iron-nitrogen permanent magnetic powder for bonded magnets
- GB/T 41967-2022Anisotropic neodymium iron boron permanent magnetic powder
- GB/T 42160-2022Grain boundary diffusion neodymium iron boron permanent magnet materials
- GB/T 40790-2021Sintered cerium-based and cerium-rich permanent magnet materials
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