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本文研究了AgI(Cr2O3)复合离子导体的红外吸收光谱,近紫外、可见反射光谱。发现复合离子导体的两种谱图均与纯AgI,Cr2O3的不同。红外吸收光谱在882—889cm-1处有一新吸收峰。电子谱中,AgI从430nm开始向长波方向表现的光离解特性消失。本来Cr2O3由配位场效应而引起的d—d吸收跃迁以410nm,530nm为中心的反射谱带,现在410nm处的谱带消失。530nm处的谱带稍有红移,且随加入Cr2O3量的增多而强度减弱。代之以整个紫外、可见区的较强吸收。对此,结合透射电子显微镜的分析,用双声子耦合和介质的变形极化以及配位场理论对AgI(Cr2O3)复合离子导体的声子谱和电子谱进行了解析。In this paper, we present the study on the infrared absorption spectrum, near ultraviolet region and visible region reflection spectrum of Agl(Cr2O3) composite ion-conductor. It is found that the two spectra observed are not the same as that of pure Agl and Cr2O3. There is a new absorption peak in the range of 882-889 cm-1 in infrared spectrum. The photodis-sociation characteristic at long wave direction from 430 nm of Agl disappears in electronic spectrum. The reflection spectrum hands of d-d absorption transition caused by ligand field effect of Cr2O3 are centered at 410 nm and 530 nm. For Agl(Cr2O3), the band at 410 nm disappears and the band at 530 nm shows red-shift and its intensity decreases with the increasing of Cr2O3. There is more strong absorption in the whole ultraviolet and visible region Based on the concept of the double-phonon coupling, the distortion polarization of medium and the ligand theory, combining with the TEM results, the phonon spectrum and electronic spectrum of Agl(Cr2O3) compsite ion-conductor are analyzed.
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