Airborne fibrous and non-fibrous particles in a silicon carbide manufacturing plant
| Autor: | G. Piolatto, Botta Gc, G. Scansetti |
|---|---|
| Rok vydání: | 1992 |
| Předmět: |
Silicon
Materials science Scanning electron microscope Carbon Compounds Inorganic chemistry.chemical_element Mineralogy Air Pollutants Occupational law.invention Crystal chemistry.chemical_compound Optical microscope X-Ray Diffraction law Silicon carbide Composite material Particle Size Quartz Crystalline Silica Quartz Micropore Filters Silicon Compounds Public Health Environmental and Occupational Health Dust General Medicine Carbon chemistry X-ray crystallography Microscopy Electron Scanning Crystallization |
| Zdroj: | The Annals of occupational hygiene. 36(2) |
| ISSN: | 0003-4878 |
| Popis: | Silicon carbide (SiC) fibre generation is reported to occur during commercial SiC crystal production. Dust levels and fibre concentrations were measured by static sampling in an Italian plant operating 24 Acheson furnaces. X-ray Diffraction (XRD) was used to assess the quartz content in the dust collected. Optical microscopy (OM) and scanning electron microscopy (SEM) were used for fibre counting and identification of fibres. Only alpha-quartz was identified, but airborne concentrations were found to be higher than the concentration of crystalline silica reported in other similar studies. Two types of fibre, coarse and fine, were identified by OM and SEM: for both, only the peak of silicon (Si) was evident at energy dispersive X-ray analysis (EDXA). Coarse fibres are irregular in shape, with a diameter greater than 5 microns. Fine (respirable) fibres are straight, regular in shape, with a typical diameter between 1 and 2 microns. Fine fibre concentration does not appear to be related either to total dust or to total fibre concentration. It cannot therefore be predicted from the nature of the various processes involved. |
| Databáze: | OpenAIRE |
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