GB/T 5246-2023Electrolytic copper powder (English PDF)

Foreword

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

This document replaces GB/T 5246-2007 "Electrolytic Copper Powder". Compared with GB/T 5246-2007, except for structural adjustments and editorial changes In addition, the main technical changes are as follows.

a) Changed the expression method of brand names, "FTD1, FTD2, FTD3, FTD4, FTD5" were changed to "FTD75, FTD48, FTD75d, FTD180, FTD48d", adding three grades of FTD38, FTD18 and FTD10 (see 4.1, 2007 edition 3.1);

b) Added product marking (see 4.2);

c) The composition content of electrolytic copper powder has been changed, "ignition residue after nitric acid treatment" has been changed to "nitric acid insoluble matter", As, Sb, Bi, Ni, Sn, Zn, and S are included in the "total of other impurity elements", the Cl-impurity content requirement is deleted, and the "total of other impurity elements" is added.

Footnotes for "sum" and "total impurities" (see 5.1, 3.2 of the 2007 edition);

d) The index values of particle size distribution, mass fraction and bulk density of electrolytic copper powder have been changed, and the table notes on the physical properties of electrolytic copper powder have been deleted. (See 5.2, 3.3 of the 2007 edition);

e) The micromorphology of electrolytic copper powder has been deleted (see 3.4 of the 2007 edition);

f) Change "apparent quality" to "appearance quality" (see 5.3, 3.5 of the 2007 version);

g) Added the method for measuring particle size distribution of FTD18 and FTD10 products, changed the method for measuring oxygen content and moisture, and deleted the words "oxygen content, moisture content or according to the method approved by both supply and demand parties", delete the measurement method of chloride ions, delete the micro Determination method of visual appearance (see Chapter 6, Chapter 4 of the 2007 edition);

h) Appendix A, Appendix B and Appendix C are deleted (see Appendix A, Appendix B and Appendix C of the 2007 version);

i) Changes to inspection, acceptance, and batching rules (see 7.1, 7.2, 5.1, 5.2 of the 2007 version);

j) Added provisions for numerical rounding (see 7.5.1);

k) Changes in marking, packaging and transportation rules (see 8.1~8.3, 6.1 of the 2007 edition);

l) The maximum storage temperature of the product has been changed from "not greater than 25°C" to "not greater than 35°C", and "electrolytic copper powder has been shipped from the factory" has been added. "The quality shelf life shall be no less than 6 months from the date" (see 8.4, 6.2 of the 2007 version);

m) Added related content of accompanying files (see 8.5).

1 Scope

This document stipulates the classification and labeling, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage and follow-up of electrolytic copper powder. line documents and order form contents.

This document applies to electrolytic copper powder produced by copper sulfate solution electrolysis. It is mainly used for powder metallurgy parts, diamond products, electric carbon products, Electrical alloys, electronic materials, friction materials and chemical catalysts, 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 For undated referenced documents, 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 Determination of bulk density of metal powders Part 1: Funnel method

GB/T 1480 Metal powder dry screening method for particle size determination

GB/T 5121 (all parts) Chemical analysis methods for copper and copper alloys

GB/T 5314 Powder sampling method for powder metallurgy

GB/T 6283 Determination of moisture content in chemical products Karl Fischer method (general method)

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

GB/T 19077 Laser diffraction method for particle size analysis

YS/T 1230.4 Chemical analysis method of anode copper Part 4: Determination of oxygen content by pulsed infrared method

3 Terms and definitions

There are no terms or definitions to be defined in this document.

4 Classification and tagging