GB/T 37406-2019Detection method of degree of sphericity of spherical silica for electronic packaging—Particle dynamic photoelectric projection method (English PDF)
电子封装用球形二氧化硅微粉球形度的检测方法 颗粒动态光电投影法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
May 10, 2019
Implementation date
December 1, 2019
Scope
GB/T 37406-2019 is the English-translated version of 电子封装用球形二氧化硅微粉球形度的检测方法 颗粒动态光电投影法.
GB/T 37406-2019 specifies the particle dynamic photoelectric projection method for the degree of sphericity, the average degree of sphericity and the distribution of the degree of sphericity of spherical silica for electronic packaging.
Clause 1 limits it to spherical particles of such silica in the range of 4 micrometres to 300 micrometres, and states no further exclusions. Clause 3 defines the degree of sphericity as the degree to which the plane projection image of a single particle is close to a standard circle.
Clause 4 sets out the method principle and is illustrated by a schematic diagram whose labelled parts include the sample cell, the light source, the light path system, the image acquisition equipment, the image analyzer and the display.
Clause 5 fixes the laboratory conditions, a temperature controlled between 20 C and 25 C and a relative humidity controlled below 80%, with the remaining conditions following GB/T 15481.
Clause 6 lists the equipment and reagents: a particle dynamic photoelectric projection analyzer with a measurement range of 4 micrometres to 300 micrometres, a 10 mL test tube with a stopper, a balance accurate to 0.02 g and an ultrasonic cleaner, with deionized water meeting the analytical laboratory water requirements of GB/T 6682 as the dispersant.
Clauses 7 to 10 then cover the preparation of the sample, the analysis steps, the calculation of the result and the test report, and clause 2 cites GB/T 6678, GB/T 6682, GB/T 15481 and ISO 13322-2.
The draft on this page breaks off at the end of the reagents, so the analysis steps and the calculation of the result are not shown. It was issued on May 10, 2019 and has applied since December 1, 2019.
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Document preview — GB/T 37406-2019
National Standard of the People's Republic of China
- ICS
- 31.030
- Classification
- L 90
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword3
- 1 Scope4
- 2 Normative references4
- 3 Terms and definitions4
- 4 Method principle5
- 5 Environmental conditions6
- 6 Test equipment and reagents6
- 7 Sample preparation7
- 8 Analysis steps7
- 9 Result calculation7
- 10 Test report8
1 Scope
This Standard specifies the particle dynamic photoelectric projection method of degree of sphericity, average degree of sphericity and distribution of sphericity degree of spherical silica for electronic packaging.
This Standard is applicable to 4µm~300µm spherical particle of spherical silica for electronic packaging.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 6678, General Principles for Sampling Chemical Products
GB/T 6682, Water for analytical laboratory use - Specification and test methods
GB/T 15481, General requirements for the competence of testing and calibration laboratories
ISO 13322-2, Particle size analysis - Image analysis methods - Part 2: Dynamic image analysis methods
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1 Degree of sphericity
A degree that a single particle plane projection image is close to a standard circle.
4 Method principle
3 - Sample cell;
4 - Light source;
5 - Light path system;
6 - Image acquisition equipment;
7 - Image analyzer;
8 - Display.
Figure 1 - Schematic diagram of particle dynamic photoelectric projection method
5 Environmental conditions
Laboratory environmental conditions: temperature is controlled at 20°C~25°C; relative humidity is controlled below 80%.
Other laboratory environmental conditions are in accordance with the requirements of GB/T 15481.
6 Test equipment and reagents
6.1 Equipment
The equipment required include:
a) Particle dynamic photoelectric projection analyzer: measurement range: 4µm~300µm;
b) Test tube with stopper: specification is 10mL;
c) Balance: accuracy is 0.02g;
d) Ultrasonic cleaner.
6.2 Reagents and solutions
Dispersant: deionized water meets the requirements of analytical laboratory water in GB/T 6682. […]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
Normative references
- GB/T 6678General principles for sampling chemical products
- GB/T 6682Water for analytical laboratory use - Specification and test methods
GB/T 15481 · ISO 13322-2
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