AGGREGATION AND MATRIX EFFECTS ON THE INFRARED-SPECTRUM OF MICROCRYSTALLINE POWDERS

被引：60

作者：

IGLESIAS, JE ^{[1
]}

OCANA, M ^{[1
]}

SERNA, CJ ^{[1
]}

机构：

[1] INST CIENCIA MAT, SERRANO 115 DPDO, E-28006 MADRID, SPAIN

来源：

APPLIED SPECTROSCOPY | 1990年 / 44卷 / 03期

关键词：

D O I：

10.1366/0003702904086227

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Two pure phonon theories have been used for the interpretation of the infrared absorption spectra of powdered solids: the theory of absorption and scattering of light by small particles (TAS) and the theory of the average dielectric constant (TADC). The comparison between both theories shows that they are equivalent for particle sizes smaller than 2 μm and low particle concentration. However, when the particle concentration is significant, only TADC can be used to analyze the experimental spectra, thus obtaining a qualitative estimation of particle aggregation in a powder. Matrix effects were also observed in the experimental powder spectra, which can be accounted for by TADC.

引用

页码：418 / 426

页数：9