GB/T 1773: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 1773-2025 | English | RFQ |
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3 days [Need to translate]
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Flake silver powder
| Valid |
GB/T 1773-2025
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| GB/T 1773-2008 | English | 229 |
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3 days [Need to translate]
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Flake silver powders
| Valid |
GB/T 1773-2008
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| GB/T 1773-1995 | English | 279 |
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3 days [Need to translate]
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Flake silver powders
| Obsolete |
GB/T 1773-1995
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| GB 1773-1988 | English | RFQ |
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3 days [Need to translate]
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Bright silver flake
| Obsolete |
GB 1773-1988
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Basic data | Standard ID | GB/T 1773-2025 (GB/T1773-2025) | | Description (Translated English) | Flake silver powder | | Sector / Industry | National Standard (Recommended) | | Date of Implementation | 2026-03-01 | | Older Standard (superseded by this standard) | GB/T 1773-2008 | GB/T 1773-2008: Flake silver powders---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Flake silver powders
ICS 77.150.99
H68
National Standards of People's Republic of China
Replacing GB/T 1773-1995
Silver flake
Posted 2008-06-17
2008-12-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard replaces GB/T 1773-1995 "silver flake."
This standard compared with the original standards, the main changes are as follows.
--- Original standard product designation revision of PAg-S2, PAg-S8, PAg-S15;
--- Increasing the particle size characteristic parameters D10, D50, D90;
--- Using GB/T 19077.1 "laser diffraction particle size analysis' of silver flake particle size measured and indicated particle size characteristics
parameter;
--- The electronic products lead-free, cadmium international trends, increase harmful impurity element cadmium maximum allowable amount (mass fraction)
0.001%;
--- Increase the burning rate, particle size distribution and other requirements.
Appendix A of this standard is a normative appendix.
The standard proposed by China Nonferrous Metals Industry Association.
This standard Nonferrous Metals by the National Standardization Technical Committee.
This standard by your research Platinum Ltd. is responsible for drafting.
The standard by the China Nonferrous Metals Industry Institute of Standards Metrology and Quality participated in the drafting.
Drafters of this standard. Huang Fuchun, Zhao Ling, Liu Jisong, Chen Fusheng, Ma Xiaofeng, to Lei.
This standard replaces the standards previously issued as follows.
--- GB/T 1773-1988, GB/T 1773-1995.
Silver flake
1 Scope
This standard specifies the silver flake of requirements, test methods, inspection rules and signs, packaging, transportation, storage and purchase order (or contract) within
Tolerance and so on.
This standard applies to electronic pastes with silver flake.
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
Determination of GB/T 1479 metal powder bulk density of the first portion of the funnel
GB/T 1774 silver powder
Determination of GB/T 5162 metal powder tap density
GB/T 15555.2 solid waste copper, zinc, lead, and cadmium - Atomic absorption spectrophotometry
GB/T 18035 method of precious metals and their alloys
GB/T 19077.1 laser diffraction particle size analysis
3 Requirements
3.1 grades and marks
3.1.1 Different silver flake particle size (D50) size, the product is divided into three categories, respectively, according to GB/T 18035 the grade. PAg-
S2, PAg-S8, PAg-S15.
3.1.2 Particle size distribution mark. D90 represents the cumulative 90% particle diameter at, D50 represents the cumulative particle diameter at 50%, D10 represents the cumulative
Particle size at 10%.
3.2 Chemical composition
Chemical composition of silver flake should meet the requirements in Table 1.
Table 1%
project
Silver content
(Mass fraction)
not less than
Impurity content (mass fraction), not more than
Pt Pd Au Rh Ir Cu Ni Fe Pb Al Sb Bi Cd
Impurity
Total
Index 99.95 0.0020.0020.0020.0010.001 0.01 0.005 0.05 0.01 0.0010.0050.0010.0020.001
Note. The mass fraction of silver at 540 ℃ burning refers to the amount of constant weight obtained by analysis of silver.
3.3 particle size distribution, specific surface area, bulk density, tap density, burn rate
Silver flake particle size distribution, specific surface area, bulk density, tap density, burn rate should be in accordance with Table 2.
Table 2
project
index
PAg-S2 PAg-S8 PAg-S15
Particle size distribution/μm
D10 ≤0.5 1 ~ 4 ≤5
D50 ≤2 2 ~ 8 8 ~ 15
D90 ≤10 5 ~ 15 ≤25
The specific surface area/(m2/g) ≥2 ≥0.5 ≤0.5
Bulk density/(g/cm3) 0.5 ~ 2 1.2 ~ 2.5 1.0 ~ 2.0
Tap density/(g/cm3) 3 ~ 6 2.5 ~ 4.5 2.0 ~ 3.5
Burning rate /%
110 ℃ ≤1 ≤0.8 ≤0.8
538 ℃ ≤3 ≤2 ≤2
3.4 appearance quality
The product should be pure, uniform color and no inclusions gray scaly metal powder visible.
Test Method 4
4.1 Analysis of the chemical composition of the arbitration method according to the standard A and GB/T 15555.2 carried appendix.
4.2 Determination of the specific surface area according to GB/T 1774 provisions of Appendix A of conduct.
4.3 Determination of particle size according to GB/T 19077.1 of the regulations.
4.4 Determination of bulk density in accordance with the provisions of GB/T 1479 will be.
4.5 Determination of tap density in accordance with the provisions of GB/T 5162 will be.
4.6 Determination of burning rate
4.6.1 Take 3.0g sample constant weight has been placed in a crucible placed in an oven heated to 110 ℃, for 60min at 110 ℃ ± 5 ℃, take
Weigh out, according to equation (1) calculate the burning rate (X1), expressed in%.
X1 = m1 m1 2 m1 1 × 1-
100 (1)
Where.
M1 --- sample weight before burning, in grams (g);
Sample weight m1 2 --- ignited in grams (g).
4.6.2 Weigh 3.0g sample constant weight has been placed in a crucible placed in tubular resistance furnace, the furnace temperature was raised to 538 ℃, at 538 ℃ ± 5 ℃
Insulation 30min, furnace cooling, remove the weight, according to equation (2) Calculation burning rate (X2), expressed in%.
3- X2 = m1 m1 m1 3 × 4
100 (2)
Where.
M1 3 --- sample weight before burning, in units of grams (g);
Sample weight m1 4 --- ignited in grams (g).
4.7 Appearance quality by visual inspection.
5 Inspection Rules
5.1 inspection and acceptance
Products should be for the inspection department inspection, to ensure product quality in line with this standard (or purchase contract) provisions, and fill in the quality certificate
Manual.
5.1.1 demand-side response receive the product tested according to the standards, such as test results inconsistent with the present standard (or purchase contract) provisions
, It should be the date of receipt of goods from suppliers within three months proposed by both parties through consultation. For arbitration, the parties may be entrusted to a single approved
Bit inspection, arbitration sampled by the supply and demand sides jointly at the demand side.
5.1.2 arbitration inspection provisions as follows. under clean conditions, extracting parts of each batch of product samples at three points substantially uniform, the combined mix
Evenly divided into three parallel samples. Respectively, which is parallel to the sample by quartering reduced to the required amount of sample tested.
5.1.3 Analysis of test results of three samples, even if there is a sample of the results failed, the batch of products should also be taken to double the sample
The failed project reinspection, if the result is still unsatisfactory, then the product is substandard.
5.2 Batch
Product acceptance shall be submitted in batches, a feed products produced batch.
5.3 Test Project
Each batch of powder should be size distribution, bulk density, tap density, burn rate and appearance quality inspection. Chemical composition, specific surface area
Demand-side inspection when required and specified in the contract.
5.4 Sampling
The batch product mix, reduced by quartering to 50g ~ 100g.
5.5 determination of test results
5.5.1 chemical composition, when the appearance of substandard quality test results, this batch of product failure.
5.5.2 burning rate, bulk density, tap density, specific surface area, particle size distribution when the test results fail, the other can take double the amount of sample is not
Repeat passing the test project, and if the test results still fail, then this batch of product failure.
6 signs, packaging, transportation and storage
6.1 mark
On inspection of the product should be labeled, indicated on the label.
a) the product name;
b) product number, lot number;
c) net weight, bottle weight;
d) the production date.
6.2 Packaging, transport and storage
6.2.1 Packaging
Qualified products with plastic bottles with closures of packaging, packaging specifications. 10g/bottle, 50g/bottle, 100g/bottle, 1000g/bottle,
5000g/bottle, 10000g/bottle, bottle plus sealing tape, into strong solid box, bottle four weeks filled with safe substances.
6.2.2 Transport
Transport should avoid contamination and mechanical damage.
6.2.3 Storage
Products should be sealed and stored in a clean, dry, non-corrosive atmosphere of the place.
6.3 Quality Certificate
Each batch of products should be accompanied by quality certificate stating.
a) supplier's name, address, phone, fax;
b) the product name;
c) Grades;
d) batch number;
e) the net weight;
f) the test results and inspection department stamp;
g) number of this standard;
h) the date of manufacture.
7 orders (or contract) content
The standard products listed in the purchase order (or contract) should be included within the following.
a) the product name;
b) Grades;
c) Product weight;
d) Packing;
e) date of delivery;
f) mode of transport;
g) number of this standard;
h) Other.
Appendix A
(Normative)
Emission spectroscopy method of impurity elements in pure silver
A. 1 Scope
This annex specifies the method for determination of impurity elements in pure silver.
This appendix applies to the determination of impurity elements in pure silver. Determination of impurity elements and the mass fraction of the range shown in Table A. 1.
Table A. Impurity element mass fraction range
Measuring element Measuring range (mass fraction) /%
Cu 0.002 ~ 0.09
Pt, Ir, Pb, Sb 0.001 ~ 0.045
Fe, Ni, Sn, Au, Rh 0.0005 ~ 0.02
Pd, Bi, Mg, Al 0.0002 ~ 0.009
A. 2 Method summary
The sample is dissolved in nitric acid, hydrochloric acid precipitation, silver rush hydrochloric acid nitric acid, evaporated to dryness. Small study, obtained silver chloride powder. Cup-shaped electrode sample loading, straight
A. 4.3 Electrode
Conical cathode electrode, the anode is cup-shaped lower electrode (outer diameter of 4mm, the inner diameter of 2.8mm, hole depth 4mm).
A. 4.4 computer-controlled spectral photometer phase plate
A. 5 Sample Preparation
A. 5.1 Preparation of standard sample
Within the measurement range, according to the content of calculations required differential, were weighed amount of the desired base silver (A.3.20), accurate to 0.001 g of, placed
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