Open AccessSTUDY ON THE THERMOCHROMIC PROPERTIES OF Bi2O3-Li2O GLASSES
Author(s) -
Danping Chen,
JIANG XIONG-WEI,
Congshan Zhu
Publication year - 2001
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.50.1501
Subject(s) - thermochromism , materials science , absorption edge , condensed matter physics , phonon , electron , band gap , physics , optoelectronics , quantum mechanics
Reversible thermochromic properties were observed in Bi2O3-Li2O system glasses. The temperature coefficient of optical absorption edge increases with increasing Bi2O3 content, implying that Bi2O3 is the main reason of thermochromism. The thermochromic mechanism is explained in terms of the temperature dependence of the optical energy gap Eg, caused mainly by the electron-phonon interaction. The low phonon energy and high electron density of Bi—O bond are important factors contributing to the electron-phonon interaction in these glasses.