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GB/T 15676-2015Terms for rare earths (English PDF)

稀土术语

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Issued by

General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of the PRC

Level / Type

National · Recommended

Issue date

September 11, 2015

Implementation date

April 1, 2016

Scope

GB/T 15676-2015 is the English-translated version of 稀土术语.

China's national vocabulary for the rare earths - the whole chain from the mineral in the ground to the functional material in a finished device. It establishes the general terms, the terms for rare earth minerals and concentrates, for the compounds and metals that come out of smelting and separation, for the rare earth alloys, and for the rare earth functional materials. China produces and processes most of the world's rare earths, and the vocabulary has to serve an industry in which a single element is traded as an ore, an oxide, a chloride, a metal, a master alloy and a sintered magnet, each with its own trade names and its own history of naming. The general terms fix what is meant by a rare earth at all, by light and heavy fractions, by the individual and mixed forms, by purity expressed as a ratio between one oxide and the total. The minerals section names the ores and the concentrates. The smelting and separation section is divided into single rare earths, mischmetal, single and mixed oxides and the salts. The alloys section covers the ferroalloys, the non-ferrous alloys and the rest. And the functional materials section, which is the longest, runs through the applications on which the industry now depends: permanent magnets, hydrogen storage alloys, phosphors, polishing powders, magneto-optical and laser materials, giant magnetostrictive materials, superconductors, magnetic refrigeration materials, catalysts, heating materials, cathode emissive materials, magnetic electronic materials, microwave absorbers, nuclear materials and scintillation crystals. Bilingual indexes of the Chinese and English terms are included. Issued on 11 September 2015 and in force since 1 April 2016, it replaces GB/T 15676-1995.

Document preview — GB/T 15676-2015

National Standard of the People's Republic of China

ICS
77.120.99
Classification
H 04
Replacing
GB/T 15676-1995

Issued by: General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of the PRC

Contents

  • ForewordIII
  • 1 Scope1
  • General terms 12
  • 3 Rare earth minerals and concentrate5
  • 4 Rare earth metal compound (smelting separation products)7
  • 4.1 Single rare earth7
  • 4.2 Misch9
  • 4.3 Single rare earth oxide9
  • 4.4 Mixed rare earth oxide11
  • 5 Rare earth alloy15
  • 5.1 Rare Earth Ferroalloy15
  • 5.2 Nonferrous alloys of rare earth16
  • 5.3 Other rare earth alloy17
  • 6 Rare Earth Functional Materials17
  • 6.1 Rare earth permanent magnet material17
  • 6.3 Rare earth luminescent material25
  • 6.5 Rare earth magneto-optical material30
  • 6.7 Giant magnetostrictive material32
  • 6.9 Rare earth magnetic refrigeration material32

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules.

This standard replaces GB/T 15676-1995 "rare-earth terms."

This standard compared with GB/T 15676-1995, in addition to editorial changes, the major technical changes are as follows.

--- Reg modified structure, standards are divided into "general terms of rare earth, rare earth minerals and enrichment, and rare earth metal compounds, rare earth

Alloys, rare earth functional materials, application of rare earth products, rare earth production technology, rare earth recyclables "eight parts, instead of the original standard

"Usually the term rare earth, rare earth minerals and enrichment of rare earth alloy and cast iron, rare earth products, the application of rare earth products, Production Engineering

Arts, part inspection and analysis of eight rare earths other common terminology Definitions ";

--- Original standard of "rare earth alloy and cast iron" clauses were moved "rare earth metal" and "application of rare earth products" clauses, the original standard

"Rare earth products" reg refinement as "rare earth metals and their compounds" and "Rare Earth Functional Materials" reg;

--- An increase of rare earth functional materials reg, presented by category of rare earth permanent magnetic materials, rare earth hydrogen storage materials, rare earth polishing materials, rare earth made

Light materials and other related terms (see 6.1 and 6.16);

--- Increased RE reg recyclables by category given rare earth waste gas, waste and other related terms (see 9.1 to 9.4);

--- Delete the original standard "test analysis of commonly used terms and definitions" section (see Chapter 8 of the 1995 edition);

--- Delete the original standard of "rare earth other aspects of the terms and definitions" (see the 1995 edition, Chapter 9);

--- A total of 30 entries deleted, an increase of 275 entries.

This standard by the National Standardization Technical Committee of rare earth (SAC/TC229) and focal points.

This standard is mainly drafted by: Baotou Rare Earth Research Institute, the National Product Quality Supervision and Inspection Center of rare earth, rare earth Metallurgy and Riko functional material

Materials National Engineering Research Center Co., Ltd., Technical and Economic Research Institute of Nonferrous Metal, Iron and Steel Research Institute of Functional Materials, Beijing industrial

1 Scope

This standard specifies the general terms of rare earth, rare earth minerals and enrichment, and rare earth metal compounds, rare earth alloy, rare earth functional materials

Materials, application of rare earth products, rare earth production technology, rare earth recyclables and other commonly used terms and definitions related aspects.

This standard applies to the production, use, testing, distribution, research and teaching in areas such as rare earth, as a unified technical term basis.

2.1 RE rareearth

Periodic table of elements from the lanthanide atomic number 57-71, namely lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium

(Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium (Lu) and atomic order number 21

General of scandium (Sc), 39 yttrium (Y) a total of 17 elements. Usually represented by the symbol RE, it is a set of elements similar chemical properties. Currently

In the rare earth industry and product standards, generally refers to a rare earth promethium (Pm), 15 elements scandium (Sc) other than the addition.

2.2 Rare Earth Elements rareearthelements

See 2.1.

2.3 Light Rare Earth lightrareearthelements

General lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd) 4 elements.

2.4 Rare Earth middlerareearthelements

General samarium (Sm), europium (Eu), gadolinium (Gd) 3 elements.

2.5 HREE heavyrareearthelements

Terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium (Lu), yttrium (Y) 8 elements in general.

2.6 Cerium RE cerium-grouprareearthelements

Cerium (Ce) consisting mainly of a group of rare earths, including lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), samarium (Sm), europium (Eu) 6 elements.

2.7 Yttrium group rare earth yttrium-grouprareearthelements

Yttrium (Y) consisting mainly of a group of rare earths, including gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb),

Lutetium (Lu), yttrium (Y) 9 elements.

2.8 Lanthanide contraction lanthanidecontraction

Atomic radius and ionic radius of the lanthanide elements with increasing atomic number gradually decrease. Causes of the lanthanides

In each additional proton nucleus, there will be a corresponding 4f electrons into orbit, while the 4f electrons of the inner electron nuclear shield is better, because

This increases with the atomic number, the effective nuclear charge increases, check the outermost electron attraction enhancements make atomic radius and ionic radius gradually reduced.

Remaining clauses in the full document

  • 3 Rare earth minerals and concentrate
  • 4 Rare earth metal compound (smelting separation products)
  • 5 Rare earth alloy
  • 6 Rare Earth Functional Materials

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 35 pages — is available in the English PDF.

Referenced standards

Similar standards

GB/T 15676-1995|GB/T 16484|GB/T 18115|GB/T 14635-2008|GB/T 4153-2008|GB/T 26417-2010

Editions of GB/T 15676

EditionTitleRevisionStatus
GB/T 15676-2015Terms for rare earthsfirst revisionCurrent
GB/T 15676-1995Terms for rare earthsfirst issueSuperseded

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