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GB/T 37054-2018: Nanotechnology -- Testing ratio of anatase to rutile in nano-titanium dioxide -- X-ray diffraction
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| GB/T 37054-2018 | English | 279 |
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Nanotechnology -- Testing ratio of anatase to rutile in nano-titanium dioxide -- X-ray diffraction
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GB/T 37054-2018
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Basic data | Standard ID | GB/T 37054-2018 (GB/T37054-2018) | | Description (Translated English) | Nanotechnology -- Testing ratio of anatase to rutile in nano-titanium dioxide -- X-ray diffraction | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G85 | | Classification of International Standard | 71.100.99 | | Word Count Estimation | 14,129 | | Date of Issue | 2018-12-28 | | Date of Implementation | 2018-12-28 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 37054-2018: Nanotechnology -- Testing ratio of anatase to rutile in nano-titanium dioxide -- X-ray diffraction
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Nanotechnology--Testing ratio of anatase to rutile in nano--titanium dioxide--X--ray diffraction
ICS 71.100.99
G85
National Standards of People's Republic of China
Anatase type and nanotechnology in nanometer titanium dioxide
Rutile ratio determination X-ray diffraction method
X-raydiffraction
Published on.2018-12-28
2018-12-28 implementation
State market supervision and administration
China National Standardization Administration issued
Content
Foreword III
1 Scope 1
2 Normative references 1
3 Principle 1
4 Instrument 2
5 Reference sample 2
6 sample preparation 3
7 Analysis step 3
8 result calculation 3
9 Result uncertainty 3
10 Experimental Report 4
Appendix A (Informative Appendix) Uncertainty Evaluation of the Measurement of Ratio of Anatase and Rutile in Nano-TiO2 Example 5
Reference 8
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by the Chinese Academy of Sciences.
This standard is under the jurisdiction of the National Nanotechnology Standardization Technical Committee (SAC/TC279).
This standard was drafted. Shanghai Jiaotong University, National Engineering Research Center for Nanotechnology and Applications.
The main drafters of this standard. He Lin, Han Haibo, Guo Xinqiu, He Dannong, Lu Qinghua, Liang Qi.
Anatase type and nanotechnology in nanometer titanium dioxide
Rutile ratio determination X-ray diffraction method
1 Scope
This standard specifies the principle of the method for determining the ratio of anatase crystal form to rutile crystal form in nanometer titanium dioxide by X-ray diffraction method.
Instruments, reference samples, sample preparation, analysis steps, results calculations, and results reporting.
This standard applies to nanometer titanium dioxide powder containing anatase and rutile crystal form with a purity of not less than 99%.
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.
JJG629 polycrystalline X-ray diffractometer verification procedures
JJF1059.1-2012 Measurement uncertainty evaluation and representation
3 Principle
The crystal has a characteristic X-ray diffraction pattern. The intensity of a diffraction peak caused by one component in a mixture composed of a plurality of crystals
Depending on the amount of this component in the mixture, the peak intensity of a component also depends on the mass absorption coefficient of the other components.
For a mixture of N phases, the intensity Ij of one of the diffraction lines of the jth term is satisfied with its mass fraction mj
The following formula (1).
Ij=Kj
Mj
Jjμm
(1)
In the formula.
Kj --- the intrinsic constant of a diffraction line of the jth phase;
Mj --- the mass fraction of the jth phase;
Ρj --- the density of the jth phase;
Mm --- mass absorption coefficient of the mixture.
For a certain phase in the mixture, Kj and ρj in the formula (1) are inherent constants, and the formula (1) can be simplified to the following formula (2).
Ij=K
Mj
Mm
(2)
K is related to the parameters of diffraction geometry, physical constant, and the nature of the phase of the measured object. It can be seen that K is a constant change.
The number is only a constant after the phase of the measured object and the experimental conditions of the diffraction are determined.
Titanium dioxide powder composed of anatase and rutile, since anatase and rutile are isomers, their mass absorption coefficients
The same, therefore, there is a mass absorption coefficient μm of the titanium dioxide sample μm=mAμmA mRμmR=μmA=μmR. By the formula (2) at this time anatase or
The diffraction line intensities of rutile are of formula (3) and formula (4).
IA=K
mA
Mm
(3)
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