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Measurement of absorbing aerosols with piezo-electric filters from Polyvinylidenefluoride -PVDF- First results

: Brandt, R.; Vater, P.; Dunkhorst, W.; Holländer, W.


Journal of Aerosol Science 18 (1987), Nr.6, S.907-910
ISSN: 0021-8502
Fraunhofer ITA ( ITEM) ()
aerosol; measurement; PFDF filter; piezoelectric filter; Polyvinylidenefluorid; PVDF

The measuring principle consists in using a piezoelectric PVDF-filter on which the aerosol particles are collected. The filter surface is then intermittently irradiated with light pulses of a wavelength which is absorbed by the particles but not by the electrode material. Therefore the energy absorbed in a thin layer is proportional to the particle mass (for a constant size distribution) and thermalized. By heat conduction, part of this energy is converted into a charge pulse by the above-described mechanisms. The filters are produced by heavy ion irradiation and subsequent nuclear track etching. (ITA)