GB/T 15677-2023Lanthanum metal and lanthanum powder (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents" drafting.

This document replaces GB/T 15677-2010 "Metal Lanthanum". Compared with GB/T 15677-2010, except for structural adjustments and editorial changes in addition, the main technical changes are as follows:

a) Metal lanthanum produced by thermal reduction method has been added to the scope (see Chapter 1, Chapter 1 of the 2010 edition);

b) Added classification (see Chapter 4);

c) Added the metal lanthanum brand La-4N and its corresponding assessment indicators (see Table 1, Table 1 of the 2010 version);

d) The assessment indicators of O, W, Mo and Ti in metal lanthanum grades La-4N, La-3N and La-2N5 have been added (see Table 1, 2010 version Table 1);

e) The assessment index of non-rare earth impurity S in the metal lanthanum brand La-2N5 has been changed from 0.02% to 0.01% (see Table 1, 2010 version of Table 1);

f) Added the chemical composition and physical properties test methods of metallic lanthanum powder (see 6.1, 6.2, Chapter 3 of the 2010 edition);

g) Added the packaging method of metallic lanthanum powder (see 7.4.2, 6.1 of the 2010 edition);

h) The metal lanthanum brand La-2N and its corresponding assessment indicators are deleted (see 3.1 of the 2010 version).

1 Scope

This document specifies the classification, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage and accompanying files.

This document applies to lanthanum metal produced by molten salt electrolysis and thermal reduction methods. It is mainly used as special steels, non-ferrous metals, hydrogen storage materials, and magnets. It is an important additive or alloying element for reactive materials, and can also be used as a reducing agent for the preparation of other rare earth metals.

This document also applies to metal lanthanum powder produced by hydrogenation-dehydrogenation method using lanthanum metal as raw material, which is mainly used for functions in the electronics industry. Materials, alloy replacement agents, other metal reducing agents, 3D printing powders, and additives for non-ferrous metals, special alloys and special steels, etc.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document.

GB/T 1479.1 Measurement of bulk density of metal powders Part 1: Funnel method

GB/T 8170 Numerical rounding rules and expression and determination of limit values

GB/T 12690 (all parts) Chemical analysis methods for non-rare earth impurities in rare earth metals and their oxides

GB/T 14635 Chemical analysis method of rare earth metals and their compounds - Determination of total rare earth content

GB/T 17803 Rare earth product brand representation method

GB/T 18115.1 Methods for chemical analysis of rare earth impurities in rare earth metals and their oxides - Part 1: Cerium, praseodymium, neodymium, samarium, Determination of amounts of europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium and yttrium

GB 39176 Packaging, marking, transportation and storage of rare earth products

YS/T 617.6 Methods for determination of physical and chemical properties of aluminum, magnesium and their alloy powders Part 6: Determination of particle size distribution and screening method

3 Terms and definitions

The following terms and definitions apply to this document.