STUDY ON UTILIZATION OF PIEZOELECTRICITY IN THE DETERMINATION OF QUARTZ IN RESPIRABLE DUST

Authors
DEVITOFRANCESCO G BENVENUTI F BISERNI M CONTE C
Citation
G. Devitofrancesco et al., STUDY ON UTILIZATION OF PIEZOELECTRICITY IN THE DETERMINATION OF QUARTZ IN RESPIRABLE DUST, Atmospheric environment. Part A, General topics, 27(11), 1993, pp. 1715-1719
Citations number
9
Categorie Soggetti
Environmental Sciences","Metereology & Atmospheric Sciences
Journal title
Atmospheric environment. Part A, General topics → ACNP
ISSN journal
09601686
Volume
27
Issue
11
Year of publication
1993
Pages
1715 - 1719
Database
ISI
SICI code
0960-1686(1993)27:11<1715:SOUOPI>2.0.ZU;2-7
Abstract
The paper describes a new method of determining quartz in respirable d ust based on the electric polarization of the quartz lattice under mec hanical pressure. The piezoelectricity of the sample surface is measur ed, after elimination of the triboelectric charges, by means of a char ge amplifier (a differentiating circuit composed of two field-effect t ransistors), through a layer of inert dust with high resistivity; char ge-time curves are obtained which are a function of the percentage of quartz particles present on the surface of the sample.