Ceramics-Silikáty 43, (3) 107 - 110 (1999) |
|
TRANSPORT PROPERTIES OF Ge-Ga-S GLASS DOPED BY PRASEODYMIUM
|
Kalužný Ján 1, Ležal Dmitrij 2, Kozík Tomáš 1,
Kubliha Marian 1,
Mariani Emil 1
|
1 Department of Physics,
Faculty of Materials Science and Technology of the Slovak Universiry of Technology,
917 24 Trnava, Slovak Republic
2 Laboratory of Inorganic Materials, IIC AV and ICT,
Pelleova 24, 160 00 Prague
|
The temperature dependencies of direct electrical conductivity and temperature and frequency dependencies of permittivity of prepared sulphide glasses doped by praseodymium ions (Ge25 Ga10-x Prx S65, x = 1000 wt. ppm) were measured. The results indicate the existence of one conductivity mechanism with activation energy 0.91 eV up to the temperature 360 °C. The dependencies of electrical modulus M" versus M' as well as the frequency dependencies M" versus f show that the glass has monophase structure and is very homogeneous with the presence of only one relax time. The glass exhibits new relax time distribution indicating the formation of new structure when it was tempered up to 380 °C, that means just below Tg ∼ 400 °C. |
 PDF (0.4 MB) |
|
