Separação Granulométrica De Nanopartículas De Prata Por Centrifugação

Sousa, W. F. de; Santos, Carolina Alves dos; Seckler, Marcelo Martins

doi:10.5151/chemeng-cobeq2014-1644-18251-179282

“…Among the commonly employed techniques for SiC classification, centrifuges stand out in the recent studies of nanoparticles [4]. These machines effectively separate particles based on their mass and size, using centrifugal force to differentiate lighter and heavier particles [4].…”

Section: Introductionmentioning

confidence: 99%

“…Among the commonly employed techniques for SiC classification, centrifuges stand out in the recent studies of nanoparticles [4]. These machines effectively separate particles based on their mass and size, using centrifugal force to differentiate lighter and heavier particles [4]. Centrifuges can also be adjusted to produce different granulometric fractions [5], making them instrumental in achieving high-quality SiC, especially when targeting the nanometer range [6].…”

Section: Introductionmentioning

confidence: 99%

Classification of Nanometric Silicon Carbide Powder by Centrifugation

Juiz,

Mallat,

Ribeiro

et al. 2023

Anais Do(a) Anais Do Encontro Nacional De Modelagem Computacional E Encontro De Ciência E Tecnologia Dos Materiais

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In this study, researchers focused on improving the quality of SiC particles, considering their different sizes and shapes. To ensure a high-quality end product, the particles were separated into distinct granulometric fractions, with a focus on the nanometer range. The efficiency of this classification process played a crucial role in determining the quality of the final product. SiC holds significant market value, reaching US$3.3 billion in 2022. Brazil stands as one of the main producers of raw SiC, but it still relies on imports for finer granulometries needed in various industrial applications. The main objective of the research was to develop a highly efficient technique for the nanometric fractionation of silicon carbide powders. After conducting experiments, the researchers successfully obtained SiC with a diameter below 2 μm. To achieve this, multiple chemical dispersants were explored for the centrifugation process, aiming to disaggregate the solution and improve the overall yield, with sodium carbonate emerging as the most promising among the tested dispersants. By presenting these findings, the researchers contribute to advancing SiC production and its applications,

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“…One of the most common techniques for SiC classification is the use of centrifuges [3]. These machines are capable of separating particles based on their mass and size, applying centrifugal force to separate lighter particles from heavier ones [4]. Additionally, centrifuges can be adjusted to produce different granulometric fractions [5], making them a valuable tool in the production of high-quality SiC, which is achieved when the SiC granulometry is in the nanometer range [6].…”

Section: Introductionmentioning

confidence: 99%

CLASSIFICAçãO NANOMéTRICA DE CARBONETO DE SILíCIO EM Pó

Juiz,

Mallat,

Sá

et al. 2023

ABM Proceedings

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ResumoPartículas de carbeto de silício (SiC) com diferentes tamanhos e formas são separadas em frações granulométricas distintas para garantir a qualidade do produto final. O SiC de alta qualidade é obtido quando a granulometria está na faixa nanométrica. A eficiência do processo de classificação é fundamental para a qualidade do produto final, com valor de mercado do SiC chegando a US$ 3,3 bilhões em 2022, o Brasil é um dos maiores produtores de SiC bruto, mas precisa importar metal em granulometrias mais finas para uso industrial. O objetivo deste estudo é desenvolver um método eficiente para o fracionamento nanométrico de pós de carboneto de silício. Os resultados mostraram que foi possível obter SiC com diâmetro inferior a 2 μm e aumentar a eficiência do processo em até 68%. Múltiplos dispersantes químicos foram testados para o processo de centrifugação para desagregar a solução e aumentar o rendimento, com destaque para o carbonato de sódio.

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Centrifugation of Nanometric Silicon Carbide Powder for Granulometric Classification

Mallat,

Juiz,

Ribeiro

et al. 2024

Rev. Foco

0

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In this study, researchers focused on improving the quality of SiC particles, considering their different sizes and shapes. To ensure a high-quality end product, the particles were separated into distinct granulometric fractions, with a focus on the nanometer range. The efficiency of this classification process played a crucial role in determining the quality of the final product. SiC holds significant market value, reaching US$3.3 billion in 2022. Brazil stands as one of the main producers of raw SiC, but it still relies on imports for finer granulometries needed in various industrial applications. The main objective of the research was to develop a highly efficient technique for the nanometric fractionation of silicon carbide powders. After conducting experiments, the researchers successfully obtained SiC with a diameter below 2 μm. To achieve this, multiple chemical dispersants were explored for the centrifugation process, aiming to disaggregate the solution and improve the overall yield, with sodium carbonate emerging as the most promising among the tested dispersants. By presenting these findings, the researchers contribute to advancing SiC production and its applications, especially in industries that require nanometer-sized SiC particles. The study not only enhances the quality of the final product but also reduces the country's dependence on imported carbide for industrial purposes.

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Separação Granulométrica De Nanopartículas De Prata Por Centrifugação

Cited by 3 publications

References 8 publications

Classification of Nanometric Silicon Carbide Powder by Centrifugation

Classification of Nanometric Silicon Carbide Powder by Centrifugation

CLASSIFICAçãO NANOMéTRICA DE CARBONETO DE SILíCIO EM Pó

Centrifugation of Nanometric Silicon Carbide Powder for Granulometric Classification

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