Cul-Cu_2O-WO_3(MoO_3)快离子导电玻璃的ESR研究

STUDY ON ESR SPECTRA OF FAST ION-CONDUCTING GLASSES IN THE SYSTEM CuI-Cu_2O-WO_3 (MoO_3)

本文报道了CuI-Cu_2O-Wo_3(MoO_3)快离子Cu^+导电玻璃在室温下的顺磁共振吸收谱。实验结果表明玻璃的顺磁共振吸收主要由W^(5+),W(3+),和Mo^(5+),Mo^(3+)以及Cu^(2+)离子引起。W^(5+),W^(3+),Mo^(5+)和Mo^(3+)离子均处于对称的四面体中,且W^(3+)和Mo^(3+)离子表现出强烈的d^6离子的高自旋态的吸收特征。Cu^(2+)离子的吸收谱则可用四方畸变的八面体场作用来解释。铜含量较低时吸收以W^(5+),W^(8+),Mo^(5+),Mo^(8+)为主,随着铜含量的增加,Cu^(2+)离子吸收变得显著。

ESR spectra of fast Cu^+ ion-conducting glasses in the system CuI-Cu_2O-WO_3(MoO_3) at room temperature are presented. Analysis of the ESR spectra shows that the paramagnetic absorptions of the glasses are mainly due to W^(5+), W^(3+), Mo^(5+), Mo^(3+), and Cu^(2+) ions, all of which are located in the symmetrical tetrahedral crystal field except Cu^(2+) ions. Among them W^(3+) and Mo^(3+) ions are of strong absorption characteristics of d^5 ions in the high spin state. The ESR spectra of Cu^(2+) ions in the glasses can be explained by assuming that they are located in an octahedral crystal field with a tetragonal distortion. At lower content of Cu^+ ions in the glasses the paramagnetic absorptions are mainly from the contributions of W^(5+) and W^(3+) or Mo^(5+) and Mo^(3+) ions; with the increase of Cu^+ content, the absorptions of Cu^(2+) ions become dominant.