GB/T 5239-2015Praseodymium oxide (English PDF)
氧化镨
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
September 11, 2015
Implementation date
April 1, 2016
Scope
GB/T 5239-2015 is the English-translated version of 氧化镨.
GB/T 5239-2015 lays down the product requirements for praseodymium oxide together with the test methods, inspection rules, marking, packaging, transport, storage and quality certificate that accompany it.
Clause 1 confines it to praseodymium oxide produced by the chemical method and used for making praseodymium metal, as a glass and ceramic additive and in rare earth permanent magnet alloys.
Clause 3 divides the product by chemical composition into the five grades Pr6O11-4N, Pr6O11-3N5, Pr6O11-3N, Pr6O11-2N5 and Pr6O11-2N, whose grade designation follows GB/T 17803, and requires the composition to meet Table 1, where every grade must reach a total rare earth oxide content of at least 99.0 % while the Pr6O11/REO ratio ranges from 99.0 % for the lowest grade to 99.99 % for the highest; the clause also lets supplier and purchaser agree separately where the demand side has special requirements.
Table 1 additionally caps the individual rare earth impurities La2O3, CeO2, Nd2O3, Sm2O3 and Y2O3 and the total of other rare earth impurities for each grade.
The foreword records what changed against the 2006 edition: a character grade designation and a Categories subclause were added, the grade of purity not less than 96 % was removed, grades of purity not less than 99.99 % and 99.95 % were introduced, and indexes for Na2O, Al2O3, sulfate, water and further impurities were written into the chemical composition table.
The normative references are GB/T 8170, all parts of GB/T 12690, GB/T 14635, GB/T 17803 and GB/T 18115.3, which supply the chemical analysis and grade designation rules the standard relies on.
It is administered by the national technical committee on rare earth standardization (SAC/TC 229) and was drafted chiefly by the Hunan Institute of Rare Earth Materials and Qiandong Rare Earth Group Co., Ltd. It replaces GB/T 5239-2006, was issued on September 11, 2015 and has applied since April 1, 2016.
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Document preview — GB/T 5239-2015
National Standard of the People's Republic of China
- ICS
- 77.120.99
- Classification
- H 65
- Replacing
- GB/T 5239-2006
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Requirements
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
This standard replaces GB/T 5239-2006 "praseodymium oxide." This compared with the standard GB/T 5239-2006 "praseodymium", mainly technical changes are as follows.
--- Adds character designation (see Chapter 3);
--- Added "Categories" (see 3.1);
--- Remove the grade purity of not less than 96% (see Table 1, 2006 edition);
--- Increasing the representation of brands and characters grades purity not less than 99.99% and 99.95%, the rare earth impurities assessment index points Do not use "component" and "Closing amount" means (see Table 1);
--- Chemical composition table adds Na2O, Al2O3, SO2-4 and the main amount of rare earth elements, water, other rare earth impurities and other non-significant amount Assessment indicators of rare earth impurities, and related indicators made a new regulation (see Table 1).
1 Scope
This standard specifies requirements for praseodymium oxide products, test methods, inspection rules and signs, packaging, transportation, storage and quality certificate.
This standard applies to chemical method was praseodymium oxide, praseodymium for production of metal, glass, ceramic additives, rare earth permanent magnet alloy used.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 8170 repair value expressed about the rules and limit values and judgment
GB/T 12690 (all parts), oxides of rare earth metals and their chemical impurity analysis of Central Africa
Determination of GB/T 14635 method for chemical analysis of rare earth metals and rare earth compound total
GB/T 17803 grades representation of rare earth products
GB/T 18115.3 rare earth metals and oxides of rare earth impurities in chemical analysis methods of lanthanum, cerium, neodymium, samarium, europium, gadolinium, terbium, Dysprosium, holmium, erbium, thulium, ytterbium, lutetium and yttrium content
3 Requirements
3.1 Categories
Product by chemical composition into Pr6O11-4N, Pr6O11-3N5, Pr6O11-3N, Pr6O11-2N5, Pr6O11-2N five brands, products Grades representation shall comply with GB/T 17803 of.
3.2 Chemical composition
Chemical composition of the product shall comply with the provisions in Table 1. If you have special requirements of the demand side, both supply and demand can be a separate agreement.
......
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
- GB/T 8170Rules of rounding off for numerical values & expression and judgement of limiting values
- GB/T 17803Designation system for rare earth products
- GB/T 18115.3Chemical analysis methods of rare earth impurities in rare earth metals and their oxides Praseodymium-Determination of lanthanum, cerium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium and yttrium contents
GB/T 12690
Similar standards
Editions of GB/T 5239
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 5239-2015 | Praseodymium oxide | current edition | Current |
| GB/T 5239-2006 | Praseodymium oxide | previous edition | Superseded |
This page sells the current edition, GB/T 5239-2015. Earlier editions are listed for reference only.
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Related Standards
GB/T 12690.1-2022 — Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides - Part 1: Determination of carbon and sulfur contents - High frequency-infrared absorption method
GB/T 12690.10-2003 — Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides--Determination of phosphorus content by molybdenum blue spectrophotometric method
GB/T 12690.11-2025 — Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides - Part 11: Determination of magnesium content - Flame atomic absorption spectrometric method
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