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GB/T 37258-2018: Silicon nitride ceramic powder
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| GB/T 37258-2018 | English | 119 |
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Silicon nitride ceramic powder
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GB/T 37258-2018
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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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