資料介紹
Piezoelectricity
The Greek word “piezo” means pressure.
In 1880, the brothers Jacques and Pierre
Curie (18 and 21 years old!) reported on
a discovery that the following year
W. G. Hankel called piezoelectricity, a
descriptive name for the phenomenon,
in which mechanical stress applied to
a sample of some materials apparently
creates electric charge on certain
surfaces of the sample.
1,2
?The total charge
of the sample remains unchanged by the
piezoelectric effect, but as a result of the
mechanical stress, surface charge density
is created.
3
?If a conductive material
covers the charged area, and a conductive
path exists from there to an electrometer,
a charge of equal in magnitude registers
in the electrometer, but that charge
belongs to the conductors, not
the sample.
The Greek word “piezo” means pressure.
In 1880, the brothers Jacques and Pierre
Curie (18 and 21 years old!) reported on
a discovery that the following year
W. G. Hankel called piezoelectricity, a
descriptive name for the phenomenon,
in which mechanical stress applied to
a sample of some materials apparently
creates electric charge on certain
surfaces of the sample.
1,2
?The total charge
of the sample remains unchanged by the
piezoelectric effect, but as a result of the
mechanical stress, surface charge density
is created.
3
?If a conductive material
covers the charged area, and a conductive
path exists from there to an electrometer,
a charge of equal in magnitude registers
in the electrometer, but that charge
belongs to the conductors, not
the sample.
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