GB/T 14321-2022Determination method for quantities of alpha-Al2O3 phase in alumina with an X-ray diffractometer (English PDF)
刚玉磨料中α-Al2O3相X射线定量测定方法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
July 11, 2022
Implementation date
February 1, 2023
Scope
GB/T 14321-2022 is the English-translated version of 刚玉磨料中α-Al2O3相X射线定量测定方法.
GB/T 14321-2022 is the Chinese national method for measuring how much alpha-Al2O3 phase a corundum abrasive contains, using an X-ray diffractometer.
It gives the principle, the apparatus and its settings, the reference materials and the calibration, the preparation of the specimen, the measurement of the diffraction lines, the calculation of the phase content and the test report.
It applies to the quantitative determination of the alpha-Al2O3 phase in the various corundum abrasives, whose hardness and behaviour depend on it. Abrasive producers and their customers' laboratories use it.
It replaces GB/T 14321-2008, was issued on 11 July 2022 and has applied since 1 February 2023.
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Document preview — GB/T 14321-2022
National Standard of the People's Republic of China
- ICS
- 25.100.70
- Classification
- J 43
- Replacing
- GB/T 14321-2008
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Preface
- 1 Scope
- 2 Normative references
- 3 Terms and Definitions
- 4 Preparation of analytical samples
- 5 Test equipment and test conditions
- 6 Test Step
- 7 Data processing
- 8 Test report
- Appendix A (normative) Determination method of KalphaSi constant
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 of Standardization Documents" drafted.
This document replaces GB/T 14321-2008 "Method for X-ray Quantitative Determination of alpha-Al2O3 Phase in Corundum Abrasives", and GB/T 14321- Compared with.2008, except for structural adjustment and editorial changes, the main technical changes are as follows.
a) The provisions on sampling have been changed (see 4.1, 3.1 of the.2008 edition);
b) The provisions on grinding and mixing of samples have been changed (see 4.2, 3.2 of the.2008 edition);
c) Changed the provisions on sample preparation (see 4.3, 3.3 of the.2008 edition);
d) Changed the test conditions (see 5.2, 4.2 of the.2008 edition);
e) Changed the test procedure (see Chapter 6, Chapter 5 of the.2008 edition);
f) Deleted the specific value of the KalphaSi constant (see 6.1 of the.2008 edition);
g) Added test report (see Chapter 8).
1 Scope
This document specifies a method for the quantitative X-ray determination of alpha-Al2O3 phase in corundum abrasives.
This document applies to the quantitative determination of alpha-Al2O3 phase in various corundum abrasives.
2 Normative references
The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document.
GB/T 4676 Ordinary abrasive sampling method
JB/T 6570 Determination method of magnetic content of ordinary abrasives
3 Terms and Definitions
There are no terms and definitions that need to be defined in this document.
4 Preparation of analytical samples
4.1 Sampling
4.1.1 Ingot sample
Take a statistically representative crystalline block, crush it until it completely passes through a screen with a basic mesh size of 1mm, and then use the JB/T 6570 medium gauge.
Determine the iron alloy particle measurement with a magnet to suck out the iron brought in. Mix evenly, reduce to 10g~20g by quartering method, put into sample bag, Dry in an oven at 105 °C ~ 110 °C for 1 hour, take it out, put it in a desiccator, and cool it for later use.
4.1.2 Abrasive samples
According to GB/T 4676 for sampling and reduction.
Abrasives with a particle size greater than 1mm shall be sampled according to the method in 4.1.1.
Abrasives with a particle size not greater than 1mm are directly reduced to 10g~20g, put into a sample bag, and dried in an oven at 105°C~110°C 1h, take it out, put it in a desiccator, and cool it for later use.
4.2 Sample grinding and mixing
4.2.1 Use powdered Si with a purity greater than 99.9% (particle size less than 45 µm) as the internal standard substance.
4.2.2 Weigh about 5g of the sample in 4.1.1 or 4.1.2, put it into a corundum mortar and grind it thoroughly, and make it all pass through the mesh. The basic size is
......
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
Similar standards
Editions of GB/T 14321
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 14321-2022 | Determination method for quantities of alpha-Al2O3 phase in alumina with an X-ray diffractometer | current edition | Current |
| GB/T 14321-2008 | Determination method for quantities of alpha-Al2O3 phase in alumina with an X-ray diffractometer | previous edition | Superseded |
This page sells the current edition, GB/T 14321-2022. Earlier editions are listed for reference only.
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Related Standards
GB/T 4676-2018 — Abrasive grains -- Sampling and splitting
JB/T 6570-1993 — Conventional abrasives - Determination of magnetic material content
JB/T 6570-2007 — Conventional abrasives - Determination of magnetic material content
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