TITLE:
Piezomodulation of Connection Conductance TlInTe2
AUTHORS:
Eldar M. Gojaev, Sevda Kh. Agaeva, Samire O. Kulieva, Mahir T. Dadashov
KEYWORDS:
Electrical Conductivity, Compound TlInTe2, Piezosensitivity, Illumination, Mechanical Deformation, Piezomodulation
JOURNAL NAME:
Open Journal of Inorganic Non-metallic Materials,
Vol.6 No.4,
September
12,
2016
ABSTRACT: This paper discusses the development method of strain sensors based on acicular
single crystal compound TlInTe2 is grown by Bridgman-Stockbarger technique.
Creating mechanically reliable ohmic contacts on said obtained single crystals was
carried out directly by spot welding wires corresponding to the ends of the capacitor
discharge heated in a stream of inert gas from the single crystal TlInTe2. This method
of creating contacts proved effective and reliable. Sensors made by this manner stuck
to the calibrated beams of steel thickness of 1 mm, a length of 30 mm and a corresponding
optimal regime got sensors with a maximum piezo-sensitivity. It was found
that if enshrined at one end of a thin steel sheet with glued crystals TlInTe2 initiate
periodic mechanical vibrations to the same frequency, occurs conductivity modulation.
The effect of piezo-modulation conductance depending on the degree of deformation,
illumination in interval of deformation and lux illumination in room
temperature were studied. The study showed that the more mechanical deformation
and illumination are, the more modulation amplitude is. We studied the modulation
of the conductivity of crystals during mechanical deformation values of 8, 14, 19, 23
and 27 × 10-5and illuminance 1000, 2750, 4750 and 6500 suites. Investigations the
level piezo-signal depending on the amplitude of mechanical vibrations at frequency
of 85 Hz, it is found that with increasing magnitude of the mechanical deformation
of 7 × 10-5 and 26 × 10-5 amplitude increases six times. It is shown that the piezoresistive
effect is clearly manifested in dynamic mode. Additional conductivity occurs
during mechanical deformation. When the illuminated samples piezoconductivity
magnitude increases linearly.