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GB/T 3457-2013Tungstic oxide (English PDF)

氧化钨

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

September 27, 2013

Implementation date

August 1, 2014

Scope

GB/T 3457-2013 is the English-translated version of 氧化钨.

GB/T 3457-2013 is the Chinese standard "Tungstic oxide". Its scope clause reads: This standard specifies the tungsten oxide requirements, test methods, inspection rules and signs, packaging, transportation, storage, quality certificate and contract (or Orders) content.

This standard applies to tungsten trioxide (referred to as the yellow tungsten), tungsten blue oxide (referred to as the blue tungsten), purple tungsten oxide (referred to as the purple tungsten). Its clauses include requirements.

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Document preview — GB/T 3457-2013

National Standard of the People's Republic of China

ICS: 77.150
Classification: H 63
Replacing: GB/T 3457-1998

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

1 Scope
2 Normative references
3 Requirements
3.2 Chemical composition
3.3 phase
3.4 size

1 Scope

This standard specifies the tungsten oxide requirements, test methods, inspection rules and signs, packaging, transportation, storage, quality certificate and contract (or

Orders) content.

This standard applies to tungsten trioxide (referred to as the yellow tungsten), tungsten blue oxide (referred to as the blue tungsten), purple tungsten oxide (referred to as the purple tungsten).

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.

Determination of GB/T 1479.1 metal powder bulk density - Part 1. funnel method

GB/T 3249 Determination of metals and their compounds Fisher particle size powder

GB/T 4324 (all parts), chemical analysis of tungsten

GB/T 5314 sampling powder metallurgy method

3 Requirements

Grade 3.1

Tungsten oxide grades and grade are shown in Table 1.

Table 1 grades and grade tungsten oxide

Acronym grade grade

Huang tungsten

WO3-0 Premium

WO3-1 a

Blue tungsten

WOx-0 grade

WOx-1 a

Purple tungsten

WO2.72-0 Premium

WO2.72-1 a

3.2 Chemical composition

Tungsten oxide chemical composition shall comply with the requirements of Table 2.

3.3 phase

Phase composition of tungsten blue, WO2.72 should not exceed 5%. Phase composition of purple tungsten, WO2.72>=95%.

3.4 size

The product's size negotiated fee determined by supply and demand, the product should be through 180µm (80 mesh) sieve.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

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Editions of GB/T 3457

Edition	Title	Revision	Status
GB/T 3457-2013	Tungstic oxide	current edition	Current
GB/T 3457-1998	Tungstic oxide	previous edition	Superseded

This page sells the current edition, GB/T 3457-2013. Earlier editions are listed for reference only.

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