GB/T 19590-2023 in English
VALIDNanoscale calcium carbonate
- Issued on:2023-09-07
- Implemented on:2024-04-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$233.00
《GB/T 19590-2023纳米碳酸钙》由TC63（全国化学标准化技术委员会）归口，TC63SC1（全国化学标准化技术委员会无机化工分会）执行，主管部门为中国石油和化学工业联合会。
Introduction
Interpretation of the National Standard of the People's Republic of China GB/T 19590—2023
Background and Significance of the Standard
Nano calcium carbonate is an important inorganic chemical product, widely used in rubber, plastics, coatings and other fields. Since its first release in 2004, this standard has been revised three times, fully reflecting the rapid development of nanotechnology and changes in industry needs. The formulation of the national standard provides an important guarantee for product quality and ensures the healthy development of the industry.Comparison of major technical changes
| Projects | Requirements of the 2011 edition | Revisions to the 2023 edition |
|---|---|---|
| Indicator system | Mainly based on particle size and content | Added requirements for particle morphology, magnesium and iron content, etc. |
| Detection methods | Test conditions for some indicators are not specified | The determination process of average particle size has been optimized, and instrument performance requirements have been added |
| Scope of application | Applicable only to nano-calcium carbonate powder | Recommended indicators for different fields in the new appendix |
Interpretation of core technical indicators
Particle morphology:Electron microscope observation shows that nano calcium carbonate can present a variety of morphologies such as cubes, quasi-cubes, rhombohedrons, etc. Different morphologies correspond to different application scenarios.
Average particle size:TEM/SEM measurement results show that the average particle size of nano calcium carbonate with a main content of 85% is between 100-200nm. For specific requirements, see Table 1.
Optimization of detection methods
Instruments and equipment:Transmission electron microscope (TEM) and scanning electron microscope (SEM) are key equipment for determining the average particle size. To ensure measurement accuracy, it is recommended to use an instrument with a point resolution of no more than 0.3nm.
Reagent requirements:The power of the ultrasonic oscillator must be greater than 250W, and the purity of ethanol should reach 95% or anhydrous level.
Industry Application and Recommendations
Rubber and Plastics:
It is recommended to use nano calcium carbonate with an average particle size of ≤20nm and a specific surface area of ≥75m²/g to ensure a good reinforcement effect.
Coatings and Ink Industry:
It is recommended to select products with particles in the range of 80-100nm, which can significantly improve the adhesion and color stability of the coating.
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