[Exposure to ceramic fibers in the occupational environment. I. Production, kinds of ceramic fibers, changes in structure of these fibers, preliminary studies in the working environment].
The production of fireproof SiO2/Al2O3 ceramic fibres started in the late forties. Primarily, the production was designed entirely for the aircraft industry. In the sixties the application of ceramic fibres became more wider. The first ceramic fibrous materials were characterised by thermal resistance reaching 1200 degrees C. Certain kinds of materials produced currently can be used in the temperature accounting for 1600 degrees C. Aluminosiliceous ceramic fibres recrystallise at high temperature (above 1000 degrees C) and produce mullite and crostobalite. Ceramic fibrous material may become hazardous to workers as a source of respirable fibres. Studies, carried out in plants which manufacture products from aluminosiliceous ceramic fibres, indicated that mean concentrations of respirable fibres ranged from 0.14 to 1.13 f/cm3 while the levels of mean concentrations of total dust accounted for 0.4-13.6 mg/m3. At working posts of plants producing china, where heat-insulating materials were changed mean level of respirable fibre concentration was 0.28-1.65 f/cm3 and concentration of total dust ranged from 7.0 to 17.7 mg/m3.
Wojtczak
J
J
Zakładu Aerozoli, Instytutu Medycyny Pracy, Lodzi.
D000395:Air Pollutants, Occupational / Q000032:analysis*; D000538:Aluminum Silicates / Q000138:chemical synthesis*; D002617:Chemical Industry; D004784:Environmental Monitoring; D006358:Hot Temperature; D006801:Humans; D016876:Metal Ceramic Alloys / Q000138:chemical synthesis* / Q000737:chemistry; D016273:Occupational Exposure; D010316:Particle Size
D000395:Air Pollutants, Occupational; D000538:Aluminum Silicates; D016876:Metal Ceramic Alloys
Narazenie na włókna ceramiczne w środowisku pracy. I. Produkcja, rodzaje włókien ceramicznych, zmiany zachodzace w strukturze tych włókien, wstepne badania w środowisku pracy.