GB/T 26416.5-2022 in English
VALIDChemical analysis method for rare earth ferroalloy—Part 5: Determination of oxygen content—Impulse-infrared absorption method
- Issued on:2022-12-30
- Implemented on:2023-07-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$88.00
《GB/T 26416.5-2022稀土铁合金化学分析方法 第5部分：氧含量的测定 脉冲-红外吸收法》由TC229（全国稀土标准化技术委员会）归口，主管部门为国家标准委。
Introduction
GB/T26416.5-2022 Standard Overview
GB/T26416.5-2022 "Chemical Analysis Methods for Rare Earth Iron Alloys Part 5: Determination of Oxygen Content - Pulse-Infrared Absorption Method" is an important standard for the detection of oxygen content in rare earth iron alloys, and is suitable for quality control in the fields of NdFeB permanent magnet materials, magnetostrictive materials, etc.
Background of Standard Revision
| Item | Old version GB/T26416.5-2010 | New version GB/T26416.5-2022 |
|---|---|---|
| Measurement range (mass fraction) | 0.010%~0.50% | 0.0050%~0.60% |
| Flux | Nickel capsule with lid | Nickel basket or nickel capsule |
| Carrier gas requirements | High purity helium | High purity helium or argon |
Technical points analysis
1. Sample preparation and weighing
The sample needs to be polished in an inert gas atmosphere, and the weighing mass range is 0.1g~0.3g to ensure the test accuracy.
2. Reagent and instrument requirements
- Pulse-infrared oxygen meter: temperature ≥2000℃, detector sensitivity 0.01μg/g
- Electronic balance: graduation value is 0.1mg
3. Determination steps and data analysis
The oxygen content is calculated by analysis software, and the result is retained to two significant figures. The absolute difference of parallel tests must meet the repeatability limit requirements in Table 1.
Implementation suggestions
To ensure the smooth implementation of the standard, it is recommended that:
- The laboratory should be equipped with a pulse-infrared oxygen meter that meets the requirements
- Strengthen personnel training and familiarize themselves with sample preparation and data processing procedures
- Establish a regular calibration system to ensure stable instrument performance
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