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GB/T 3045-2024: Conventional abrasive - Chemical analysis of silicon carbide
Status: Valid GB/T 3045: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 3045-2024 | English | 759 |
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Conventional abrasive - Chemical analysis of silicon carbide
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GB/T 3045-2024
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| GB/T 3045-2017 | English | 679 |
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Conventional abrasive -- Chemical analysis of silicon carbide
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GB/T 3045-2017
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| GB/T 3045-2003 | English | 599 |
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Abrasive grains -- Chemical analysis of silicon carbide
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GB/T 3045-2003
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| GB/T 3045-1989 | English | 399 |
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Chemical analysis methods for silicon carbide
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GB/T 3045-1989
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PDF similar to GB/T 3045-2024
Basic data | Standard ID | GB/T 3045-2024 (GB/T3045-2024) | | Description (Translated English) | Conventional abrasive - Chemical analysis of silicon carbide | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J43 | | Classification of International Standard | 25.100.70 | | Word Count Estimation | 38,324 | | Date of Issue | 2024-09-29 | | Date of Implementation | 2025-04-01 | | Older Standard (superseded by this standard) | GB/T 3045-2017 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 3045-2024: Conventional abrasive - Chemical analysis of silicon carbide---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.
ICS 25.100.70
CCSJ43
National Standard of the People's Republic of China
Replace GB/T 3045-2017
Chemical analysis method of common abrasive silicon carbide
Released on 2024-09-29
2025-04-01 Implementation
State Administration for Market Regulation
The National Standardization Administration issued
Table of Contents
Preface III
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Sample preparation 1
4.1 Abrasive 1
4.2 Crystal block 1
5 Impurity Analysis 2
5.1 Determination of surface carbon (free carbon) 2
5.2 Determination of silicon dioxide 6
5.3 Determination of surface silicon (free silicon) 9
5.4 Determination of loss after acid treatment (LAT) 13
5.5 Determination of ferric oxide (iron) 14
5.6 Determination of Aluminium Oxide (Aluminium) 16
5.7 Determination of calcium oxide (calcium) and magnesium oxide (magnesium) (atomic absorption spectrometry) 17
5.8 Determination of Iron, Aluminum, Calcium and Magnesium by Inductively Coupled Plasma Optical Emission Spectrometry 19
6 Determination of total carbon 21
6.1 Absorption Gravimetric Method 21
6.2 Infrared absorption method 22
6.3 Permissible error 23
7 Determination of Silicon Carbide 23
7.1 Direct determination 23
7.2 Indirect determination 25
7.3 Permissible error 25
8 Test report 25
Appendix A (Informative) Comparison of structure numbers between this document and ISO 9286.2021 27
Appendix B (Informative) Technical differences between this document and ISO 9286.2021 and their causes 29
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
This document replaces GB/T 3045-2017 "Chemical analysis methods for common abrasive silicon carbide". Compared with GB/T 3045-2017,
In addition to structural adjustments and editorial changes, the main technical changes are as follows.
a) The sample preparation method has been changed (see Chapter 4, 3.1 and 4.2 of the.2017 edition);
b) The test steps and data processing for the combustion absorption gravimetric method for determining surface carbon (free carbon) have been modified (see 5.1.2.4 and 5.1.2.5,
3.4.1.4 and 3.4.1.5 of the.2017 edition);
c) The test procedure for the determination of silicon dioxide by spectrophotometry has been changed (see 5.2.2.4, 3.2.1.4 of the.2017 edition);
d) The test procedure for the determination of surface silicon (free silicon) by spectrophotometry has been changed (see 5.3.3.4, 3.3.1.4 of the.2017 edition);
e) Added the allowable error for the determination of loss on acid treatment (LAT) (see 5.4.6);
f) The EDTA volumetric method for determining calcium oxide and magnesium oxide has been deleted (see 3.9.1 of the.2017 edition);
g) Modified the data processing for the determination of iron, aluminum, calcium and magnesium by inductively coupled plasma emission spectrometry (see 5.8.5,.2017 edition)
3.10.5);
h) Added the applicable scope of the indirect method for determining silicon carbide content (see 7.2.2);
i) The method for determining iron, aluminum, calcium and magnesium by radiographic fluorescence spectrometry (RFA) has been deleted (see Chapter 5 of the.2017 edition).
This document is modified to adopt ISO 9286.2021 "Chemical analysis of abrasives and crystalline bulk silicon carbide".
Compared with ISO 9286.2021, this document has many structural adjustments. Comparison table of structural number changes between the two documents
See Appendix A.
This document has many technical differences compared to ISO 9286.2021.
A list of these technical differences and their causes is given in Appendix B.
The following editorial changes were made to this document.
--- To coordinate with the existing standards, the name of the standard is changed to "Chemical Analysis Methods of Common Abrasive Silicon Carbide".
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document was proposed by the China Machinery Industry Federation.
This document is under the jurisdiction of the National Technical Committee for Standardization of Abrasives and Grinding Tools (SAC/TC139).
This document was drafted by. Zhengzhou Abrasives and Grinding Research Institute Co., Ltd., National Abrasives Quality Inspection and Testing Center, Pingdingshan Yi
Chengxin Materials Co., Ltd., Zibo Jinjiyuan Abrasives Co., Ltd., Shandong Shengnuo Industrial Co., Ltd., Shaoguan Weiming Abrasives Co., Ltd.,
Shenzhen Yonglin Technology Co., Ltd.
The main drafters of this document are. Da Chaohong, Zhao Jun, Yu Jiayin, Zhang Liang, Tian Xiying, Ding Jianping, Gao Hui, Shang Haiquan, Wei Wei, Sun Shuaihao, Lü Xiaofeng,
Su Yan.
The previous versions of this document and the documents it replaces are as follows.
---First published as GB/T 3045-1989 in 1989, first revised in.2003, and second revised in.2017;
---This is the third revision.
Chemical analysis method of common abrasive silicon carbide
1 Scope
This document describes the analytical methods for the main chemical components in silicon carbide.
This document is applicable to abrasives and crystal blocks with a silicon carbide content of not less than 95% (mass fraction) surface carbon (free carbon), silicon dioxide,
Analysis activities for chemical composition such as surface silicon (free silicon), acid treatment loss, iron, aluminum, calcium, magnesium, total carbon and silicon carbide.
2 Normative references
The contents of the following documents constitute essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document.
GB/T 4676 Sampling method for common abrasives (GB/T 4676-2018, ISO 9138.2015, MOD)
GB/T 6682 Specifications and test methods for water used in analytical laboratories (GB/T 6682-2008, ISO 3696.1987, MOD)
3 Terms and definitions
There are no terms or definitions that require definition in this document.
4.Sample preparation
4.1 Abrasive
According to GB/T 4676, sample and reduce to 50g~60g, dry in an oven at 105℃~110℃ for 1h, take out, and put in a dryer
Cool in a container and set aside.
For the determination of total carbon and surface carbon (free carbon), the abrasive with a particle size of F120 or coarser or P150 or coarser should be crushed before drying.
Crumble, grind until all the particles pass through a sieve with a basic mesh size of 150 μm and mix well. If a steel mortar is used, iron will be introduced during the grinding process.
If the amount is less than 0.1% (mass fraction), it can be ignored; if it is greater than 0.1% (mass fraction), the iron content of the sample should be determined at the same time (according to
5.8) and include it in the corresponding result. When determining the iron content, it is best to use a hard metal, boron carbide or corundum mortar.
If iron is introduced into the sample, the mass of the analyzed sample should be corrected according to formula (1).
m0=m1[1-w(Fe)] (1)
Where.
m0 --- sample calibration mass, in grams (g);
m1 --- the mass of the sample containing iron, in grams (g);
w(Fe)---The mass fraction of iron introduced into the sample due to grinding.
4.2 Crystallization block
Crystalline bulk samples should be prepared by the following steps.
a) Pre-dry several samples of about 20 kg in an oven at 105°C~110°C.
b) Crush the sample in a laboratory jaw crusher to a particle size of less than 2.36 mm. Sieve the sample through a 2.36 mm sieve and crush
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