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GB/T 16661-2018: Cerium carbonate
Status: Valid GB/T 16661: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 16661-2018 | English | 119 |
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Cerium carbonate
| Valid |
GB/T 16661-2018
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| GB/T 16661-2008 | English | 239 |
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Cerium carbonate
| Obsolete |
GB/T 16661-2008
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| GB/T 16661-1996 | English | 279 |
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Cerium carbonate
| Obsolete |
GB/T 16661-1996
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PDF similar to GB/T 16661-2018
Basic data | Standard ID | GB/T 16661-2018 (GB/T16661-2018) | | Description (Translated English) | Cerium carbonate | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H65 | | Classification of International Standard | 77.120.99 | | Word Count Estimation | 6,627 | | Date of Issue | 2018-06-07 | | Date of Implementation | 2019-03-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 16661-2018: Cerium carbonate---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.
Cerium carbonate
ICS 77.120.99
H65
National Standards of People's Republic of China
Replace GB/T 16661-2008
Barium carbonate
Published on.2018-06-07
2019-03-01 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 replaces GB/T 16661-2008 "Barium Carbonate".
The main technical changes of this standard compared with GB/T 16661-2008 are as follows.
--- Increased the scope of application of the standard (see Chapter 1);
--- Added normative references GB/T 14635, GB/T 17803 (see Chapter 2);
---Modified the contents of the normative reference file GB/T 12690, and modified "GB/T 12690 (all parts)" to
GB/T 12690.7 Determination of non-rare rare earth impurities in rare earth metals and their oxides - Determination of silicon content
Spectrophotometry" (see Chapter 2, Chapter 2 of the.2008 edition);
--- Revised the reference content of the normative reference document GB/T 16484, "GB/T 16484.19 rare earth chloride, rare earth carbonate chemistry
Analytical method for determination of total amount of rare earth oxides" was revised to "GB/T 16484 (all parts)" (see Chapter 2,.2008 edition)
chapter 2);
--- Added "character grade" (see Chapter 3);
--- Added grade 023245 and its corresponding technical indicators (see 3.2);
--- Revised the technical index of iron (Fe2O3) content in grade 023240, modified the original iron (Fe2O3) content to not more than 0.001%
The content of iron (Fe2O3) is not more than 0.002% (see 3.2, 3.1 of.2008 edition);
---Modified the technical indicators of non-rare earth impurity magnesium (MgO) content in grades 023240, 023235, 023230, the original grade
Magnesium (MgO) content in 023240 is not more than 0.002% modified to not more than 0.005%, magnesium (MgO) content in grade 023235
Not more than 0.003% is modified to not more than 0.01%, and the magnesium (MgO) content of grade 023230 is not more than 0.003%.
More than 0.01% (see 3.2, 3.1 of the.2008 edition);
--- Revised the technical indicators of non-rare earth impurity sodium (Na2O) and zinc (ZnO) content in grades 023240, 023235, the original grade
023240, the content of sodium (Na2O) is not more than 0.02%, modified to not more than 0.01%, and the content of zinc (ZnO) is not more than 0.005%.
Changed to not more than 0.003%; the original grade 023235 sodium (Na2O) is not more than 0.05% modified to not more than 0.02%, zinc
The (ZnO) content is not more than 0.008% and is modified to be no more than 0.005% (see 3.2, 3.1 of the.2008 edition);
---Modified the technical index of chlorine (Cl-) content in grade 023240, and modified the original chlorine (Cl-) content to not more than 0.03% to be small
At 0.05% (see 3.2, 3.1 of the.2008 edition);
---Modified the technical indicators of non-rare earth impurity sulfate (SO42-) content in grades 023240, 023235, 023230, the original grade
The content of sulfate (SO42-) in 023240 is not more than 0.01% and is modified to not more than 0.02%. Sulfate in grade 023235
The content of (SO42-) is not more than 0.01% and is not more than 0.03%. The content of sulfate (SO42-) in grade 023230 is not more than
0.02% was modified to be no more than 0.03% (see 3.2, 3.1 of the.2008 edition);
--- Deleted the original grade 023230A (relative purity is 99.9%) (see 3.1 of the.2008 edition);
--- Removed the original grade 023215 (relative purity is 95.0%) (see 3.1 of the.2008 edition).
This standard is proposed and managed by the National Rare Earth Standardization Technical Committee (SAC/TC229).
This standard was drafted. Jiangxi Golden Century New Materials Co., Ltd., Yiyang Hongyuan Rare Earth Co., Ltd., Jiangyin Jiahua New Materials
Resources Co., Ltd., North China Rare Earth (Group) High-Tech Co., Ltd., Baotou Huamei Rare Earth High-Tech Co., Ltd., Sichuan Jiangxi Copper Rare Earth
Limited Liability Company, R&D Rare Earth New Materials Co., Ltd., Sichuan Leshan Ruifeng Metallurgy Co., Ltd., Baotou Rare Earth Research Institute, Guangdong Zhu
Jiang Rare Earth Co., Ltd., Hunan Rare Earth Metal Materials Research Institute, Jidong Rare Earth Group Co., Ltd.
The main drafters of this standard. Chen Xiaohong, Zhou Wufeng, Liu Jianfeng, Civilization, Chen Yuehua, Xiao Rui, Zhang Guoguang, Xu Guohua, Hu Juan, Wang Meng,
Feng Xinrui, Jie Ping, Jin Yanhua, Liu Rongli, Wen Bin.
The previous versions of the standards replaced by this standard are.
---GB/T 16661-1996, GB/T 16661-2008.
Barium carbonate
1 Scope
This standard specifies the requirements, test methods, inspection rules and signs, packaging, transportation, storage and quality certificates of barium carbonate.
This standard is applicable to strontium carbonate obtained by chemical method, mainly used for polishing powder, rare earth oxygen storage material for automobile exhaust gas purification catalyst, engineering plastic
Material pigments, glass, ceramics, electronic abrasive materials, etc.
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 8170 Numerical Rounding Rules and Representation and Determination of Limit Values
GB/T 12690.7 Determination of non-rare rare earth impurities in rare earth metals and their oxides - Determination of silicon content
Degree method
GB/T 14635 Chemical analysis of rare earth metals and their compounds - Determination of total
GB/T 16484 (all parts) Chemical analysis method of rare earth chloride and light rare earth carbonate
GB/T 17803 Rare Earth Product Grade Representation Method
GB/T 18115.2 Chemical analysis method for rare earth impurities in rare earth metals and their oxides 铈中镧,镨,钕,钐,铕,钆,铽,
Determination of 镝, 钬, 铒, 铥, 镱, 镥 and 钇
3 requirements
3.1 Product brand
The product is divided into chemical components. Ce2(CO3)3·nH2O-4N5, Ce2(CO3)3·nH2O-4N, Ce2(CO3)3·nH2O-3N5,
Ce2(CO3)3·nH2O-3N, Ce2(CO3)3·nH2O-2N, five grades, the product designation method should conform to GB/T 17803
Provisions.
3.2 Chemical composition
The chemical composition of the product shall comply with the requirements of Table 1. If there are special requirements, the supplier and the buyer may negotiate separately.
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