Electrostatic Charges of Abrasive Powders: The Role of Particle Size and Humidity

resumo

Electrostatically coated abrasives have drawn vast attention in many industrial applications. Therefore, influence of humidity on the electrical properties of alpha-SiC and alpha-Al2O3 abrasive powders with three mu m-range particle sizes are here investigated using electrostatic charge and DC resistivity analysis. From the three particle size ranges used, 15-16 mu m, 60-63 mu m and 153-156 mu m, the intermediate one (60-63 mu m) is found to be associated with the highest charge values, measured using a double Faraday cup method, as well as the highest resistivity for both materials. However, comparing SiC and Al2O3 powders, the latter ones present about twice larger charges in dry and normal humidity states accompanied by several orders of magnitude larger resistivity. Under humid conditions all the powders reveal diminishing charge and resistivity values.

palavras-chave

AQUEOUS SUSPENSION; AL2O3

categoria

Materials Science, Multidisciplinary; Materials Science, Coatings & Films; Physics, Applied

autores

Tkach, A; Garcez, M; Vilarinho, PM

nossos autores

agradecimentos

This work was developed within the scope of the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020 and UIDP/50011/2020, financed by national funds through the Portuguese Foundation for Science and Technology/MCTES.

Partilhe este projeto

Publicações similares

Usamos cookies para atividades de marketing e para lhe oferecer uma melhor experiência de navegação. Ao clicar em “Aceitar Cookies” você concorda com nossa política de cookies. Leia sobre como usamos cookies clicando em "Política de Privacidade e Cookies".