Thermally stimulated currents in silica xerogels with temperature gradient.

• Autorzy: Sodolski, H. , Tomaszewicz, W.
• Języki publikacji: EN

Abstrakty

EN

Presents results obtained by the application of the method of thermally stimulated depolarization (TSD) to investigate dipole relaxation in SiO/sub 2/ xerogels. The presence of a strong temperature gradient in the sample has been revealed during measurements of the TSD current. The paper describes the method of determination of activation energy W, initial polarization P/sub 0/ and factor tau /sub 0/, for the dipole relaxation processes under investigation. It has been shown that the modified TSD method is a sensitive tool for the investigation of changes taking place in the peripheral molecular layer on the surface of pores in SiO/sub 2/ xerogels.

Słowa kluczowe

PL

prąd stymulowany termicznie; kserożel krzemionkowy; kserosilikażel; gradient temperatury; polaryzacja; depolaryzacja; energia aktywacji; relaksacja

EN

thermally stimulated currents; silica xerogels; temperature gradient; depolarization; dipole relaxation; activation energy; initial polarization; relaxation

• Czasopismo: Optica Applicata
• Rocznik: 2000
• Tom: Vol. 30, nr 4
• Strony: 543-551
• Opis fizyczny: Bibliogr. 20 poz., rys. 6, tab. 1

Twórcy

autor

Sodolski, H.

autor

Tomaszewicz, W.

• Faculty of. Applied Physics and Mathematics, Technical University of Gdańsk, ul. G. Narutowicza 11/12, 80-952 Gdańsk, Poland.