الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
three chalcogenide glasses of Ge20 Se12 TeGS’
Ge
2
7 Sell Te62 and Gel~ Te75 InlO have been prapered
by q~enching their melts from abo~t 1000 00 in ice water •
Rectang~ar discs of 2 x 2 x 1 mmJ dimensions are s~bjected
to electrical cond~ctivity meas~rements • It is fomd
that the mentioned systems behave the normal semicond~ctors
behavio~ with activation energies of abo~t 0.5 eVe
The effect of thermal annealing on the both
cond~ctivity and the activation energy is st~died to follow
up the effect of aging on the stability of these systems
• It is fomd in general that tb,econd~ctivity increases
with annealing time • Besides, the activation energies
decrease with annealing time • This is s~ested to
be d~e to the n~cleation and growth process. This res-
~lt are confirmed with X-ray analysis.
In the other hand, I-V charact.eristics . showed
memory switching phenomena. The switching process is
interpreted according to the electrothermal model.