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Abbot René-Just Haüy |  | ||
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| Saint-Just-en-Chaussée
(Oise) 28.February.1743- Parigi
03.June.1822 |
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| 1794 Piezoelectricity | ||||
He
studied the structure of crystals, the magnetic properties of minerals
such as magnetite, chemical composition and physical properties of
minerals and electrical properties of the same. From here the
discovery of the properties' PIEZOELETTRICHE 'of some crystals.
Piezoelectric crystals are used in a variety of uses one of which is
the construction of heads of turntables for reading the microsolchi
vinyl discs. | ||||