|
US$599.00 · In stock
Delivery: <= 5 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 20020-2025: Fumed silica
Status: Valid GB/T 20020: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 20020-2025 | English | 599 |
Add to Cart
|
5 days [Need to translate]
|
Fumed silica
| Valid |
GB/T 20020-2025
|
| GB/T 20020-2013 | English | 739 |
Add to Cart
|
6 days [Need to translate]
|
Fumed silica
| Valid |
GB/T 20020-2013
|
| GB/T 20020-2005 | English | 799 |
Add to Cart
|
5 days [Need to translate]
|
Fumed silica
| Obsolete |
GB/T 20020-2005
|
Standard similar to GB/T 20020-2025 GB/T 51033 GB/T 50082 GB/T 20020 Basic data | Standard ID | GB/T 20020-2025 (GB/T20020-2025) | | Description (Translated English) | Fumed silica | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G49 | | Classification of International Standard | 83.040.20 | | Word Count Estimation | 30,335 | | Date of Issue | 2025-08-01 | | Date of Implementation | 2026-02-01 | | Older Standard (superseded by this standard) | GB/T 20020-2013 | | Issuing agency(ies) | State Administration for Market Regulation, Standardization Administration of China | GB/T 20020-2025: Fumed silica---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT20020-2025
ICS 83.040.20
CCSG49
National Standard of the People's Republic of China
Replaces GB/T 20020-2013
Fumed silica
Released on August 1, 2025
Implementation on February 1, 2026
State Administration for Market Regulation
The National Standardization Administration issued
Preface
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 20020-2013 "Fumed Silica". Compared with GB/T 20020-2013, except for the structural adjustment and editing
In addition to the functional changes, the main technical changes are as follows.
--- Changed the scope (see Chapter 1, Chapter 1 of the.2013 edition);
--- Changed the classification of fumed silica (see 4.1, 3.2 of the.2013 edition);
--- Changed the technical indicators of suspension pH value and tap density (see Table 2, Table 2 of the.2013 edition);
--- Added the requirements for sampling during the production process (see 6.5.2);
--- Changed the product packaging requirements (see 9.1, 9.2, 9.4, 7.1, 7.2, 7.4 of the.2013 edition);
--- Deleted sulfuric acid solution (see A.1, A.3.2, A.6.3 of the.2013 edition);
--- Changed the requirements for adding hydrofluoric acid (see A.6.4, A.6.3 of the.2013 edition);
--- Deleted the heating residue until no white smoke is generated (see A.6.4 of the.2013 edition);
--- Changed the calculation formulas for loss on ignition and silicon dioxide content [see formula (A.1), formula (A.2),.2013 edition of the
Formula (A.1), Formula (A.2)];
--- Changed the sample weight (see B.4.2.2, B.4.2.2 of the.2013 edition);
--- Changed the expression of mass concentration and loss on ignition [see formula (B.1), formula (B.2), formula (D.1),.2013 edition of the
Formula (B.1), Formula (B.2), Formula (D.1)];
--- Changed the density unit, liquid and container volume unit representation (see Appendix A, Appendix B, Appendix D, Appendix E, Appendix G,.2013
Appendix A, Appendix B, Appendix D, Appendix E, and Appendix G of the.2012 edition);
--- Added "If the result is abnormal, other spectral lines with less interference can be used for testing" (see B.5.3.2);
--- Changed the test results of aluminum oxide, titanium dioxide and ferric oxide to approximately 1 mg/kg according to GB/T 8170 (see
B.6.2, B.6.2 of the.2013 edition);
--- Changed the principle of carbon content determination (see C.1, C.1 of the.2013 edition);
--- Changed the weighing of reference substances and samples (see C.5.3, C.5.4.1, C.5.2, C.5.3.1 of the.2013 edition);
--- Changed the formula for calculating carbon content [see formula (C.1), formula (C.1) of the.2013 edition];
--- Changed the reported average of the two determination results of chlorine content to 1 mg/kg in accordance with GB/T 8170 (see
D.7, D.7 of the.2013 edition);
--- Changed "Glass container, conical flask, ≥50mL (100mL recommended)" (see E.3.2, E.3.2 of the.2013 edition);
--- Changed "If a wetting agent is used, the volume of ethanol should be reduced" (see E.5.6, E.5.4 of the.2013 edition);
--- Deleted reproducibility (see E.7.2 of the.2013 edition);
--- Changed the specifications of the weighing bottle (see F.2.2, F.2.2 of the.2013 edition);
--- The calculation formula of volatile matter at 105℃ has been changed [see formula (F.1), formula (F.1) of the.2013 edition];
--- Changed Principle B Method --- Instrumental Method (see F.8, F.8 of the.2013 edition);
--- Change the vibration frequency to "250 ± 15 times/min" (see G.1.1.3, G.1.1.3 of the.2013 edition);
--- Changed the precision of tapped volume and tapped density (see G.5, G.5 of the.2013 edition);
--- Change the sample mass to 50g (see H.5.2, H.5.1 of the.2013 edition);
--- Changed the precision of 45μm sieve residue (see H.7, H.7 of the.2013 edition).
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 Petroleum and Chemical Industry Federation.
This document is under the jurisdiction of the National Technical Committee on Rubber and Rubber Products of Standardization (SAC/TC35).
This document was drafted by. Guangzhou Huifu Research Institute Co., Ltd., Zhonghao Heiyuan Chemical Research and Design Institute Co., Ltd., Sichuan University of Science and Technology,
Xinxing High-Tech Nano New Materials (Xuzhou) Co., Ltd., Jiangxi Bluestar Spark Silicone Co., Ltd., Jiangxi Hongbai New Materials Co., Ltd.,
Wacker Chemical Fumed Silica (Zhangjiagang) Co., Ltd., Emeishan Changqing New Materials Co., Ltd., Tangshan Sanfu Silicon Industry Co., Ltd.,
Zhengzhou Gesi Technology Development Co., Ltd. and Zhejiang Kaihua Synthetic Materials Co., Ltd.
The main drafters of this document are. Wang Yuelin, Liu Jian, Li Chunyang, Wei Qiang, Ouyang Wenwu, Wu Guoming, Zeng Meiqi, Shi Lisong, Qin Zaixing, Zhang Hongjun,
Cheng Jiahui.
The previous versions of this document and the documents it replaces are as follows.
--- First published as GB/T 20020-2005 in.2005 and first revised in.2013;
---This is the second revision.
Fumed silica
Warning. Personnel using this document should have practical experience in regular laboratory work. This document does not address all possible safety issues.
The user is responsible for taking appropriate safety and health measures and ensuring that the conditions stipulated by relevant national laws and regulations are met.
1 Scope
This document defines the terms and definitions of fumed silica, specifies product technical requirements, describes sampling and testing methods, and establishes
It specifies the rules for sample inspection, stipulates the contents of marking, packaging, storage and transportation, and gives the product classification for the convenience of technical regulations.
This document applies to the production, testing and acceptance of fumed silica.
2 Normative references
The contents of the following documents constitute the 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 6003.1 Technical requirements and inspection of test sieves Part 1.Wire mesh test sieves
GB/T 6682 Specifications and test methods for water used in analytical laboratories
GB/T 8170 Rules for rounding off values and expression and determination of limit values
GB/T 9724 General rules for determination of pH value of chemical reagents
GB/T 10722 Carbon black - Determination of total surface area and external surface area - Nitrogen adsorption method
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
Amorphous silicon dioxide and its surface-modified products generated by the hydrolysis of halogenated silanes in a high-temperature flame.
4 Categories
4.1 Fumed silica is generally divided into two categories. Type A and Type B. Type A fumed silica is not surface modified; Type B fumed silica is
Silicon oxide is made from type A products through surface modification.
4.2 The product name of fumed silica is composed of the type code (A/B) and the typical nitrogen adsorption specific surface area (NSA).
See Table 1.Manufacturers can refer to the typical classification names to name newly developed fumed silica products.
Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 20020-2025_English be delivered?Answer: Upon your order, we will start to translate GB/T 20020-2025_English as soon as possible, and keep you informed of the progress. The lead time is typically 3 ~ 5 working days. The lengthier the document the longer the lead time. Question 2: Can I share the purchased PDF of GB/T 20020-2025_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 20020-2025_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet. Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. If you need your currency to be printed on the invoice, please write an email to [email protected]. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay. Question 5: Should I purchase the latest version GB/T 20020-2025?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 20020-2025 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.
|