GB/T 37258-2018 English PDF

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GB/T 37258-2018: Silicon nitride ceramic powder
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 37258-2018	119	Add to Cart	3 days	Silicon nitride ceramic powder	Valid

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Basic data

Standard ID: GB/T 37258-2018 (GB/T37258-2018)
Description (Translated English): Silicon nitride ceramic powder
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: Q32
Classification of International Standard: 81.060.30
Word Count Estimation: 6,633
Date of Issue: 2018-12-28
Date of Implementation: 2019-11-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 37258-2018: Silicon nitride ceramic powder

---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.
Silicon nitride ceramic powder ICS 81.060.30 Q32 National Standards of People's Republic of China Silicon nitride ceramic powder Published on.2018-12-28 2019-11-01 implementation State market supervision and administration China National Standardization Administration issued

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard was proposed by the China Building Materials Federation. This standard is under the jurisdiction of the National Industrial Ceramics Standardization Technical Committee (SAC/TC194). This standard was drafted. Zibo Hengshi Technology Development Co., Ltd., Shandong Industrial Ceramics Research and Design Institute Co., Ltd., Sinoma High-tech Nitriding Ceramics Co., Ltd. The main drafters of this standard. Jia Shiheng, Zhen Zhenhua, Sun Feng, Wu Ping, Li Haijian, Chen Changzhu. Silicon nitride ceramic powder

1 Scope

This standard specifies the classification, classification and marking of silicon nitride ceramic powders, requirements, test methods, inspection rules, marking, packaging, transportation and Storage. This standard is applicable to silicon nitride ceramic powders prepared by silicon powder nitriding with a nitrogen content of not less than 37% and a maximum particle size of ≤ 40 μm. its The products prepared by his preparation process can be referred to for execution.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 191 packaging storage and transportation icon GB/T 6679 Solid Chemical Products Sampling General GB/T 16555-2008 Chemical analysis method for carbon, silicon carbide and nitride refractories GB/T 19077 Particle Size Analysis Laser Diffraction Method JY/T 010 General Principles of Analytical Scanning Electron Microscopy JY/T 016-1996 General rules for wavelength dispersion X-ray fluorescence spectrometry JC/T 2342 silicon nitride material phase content analysis method 3 Classification, grading and marking 3.1 Classification The powders are classified into two types according to the main crystalline phase in the powder. Class A. high alpha phase; class B. high beta phase. 3.2 Classification and marking 3.2.1 Classification by element content According to the content of elements such as N, O, Fe, Al, Ca, C and free silicon in the powder, the high α phase silicon nitride powder is divided into four levels of 1, 2, 3 and 4; The phase silicon nitride powder is divided into two stages of 1, 2, and 2. 3.2.2 Classification by particle size distribution According to the average particle size and particle size distribution of the powder, the silicon nitride powder is divided into four stages of 1, 2, 3, and 4. 3.2.3 Marking The order of product marking is. main crystalline phase - element content level - particle size grade. Example 1. The main crystalline phase is the α phase, the elemental content is in accordance with the first grade, and the silicon nitride powder having the particle size class conforming to the first-class product standard is marked as. A11. Example 2. The main crystal phase is the β phase, the element content is in accordance with the grade 1, and the silicon nitride powder having the particle size level conforming to the grade 3 product standard is labeled. B13. ......

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