Effect of particle shape on the IR reflectance spectra of pressed powders of anisotropic materials

被引：26

作者：

Pecharromán, C ^{[1
]}

Iglesias, JE ^{[1
]}

机构：

[1] CSIC, Inst Ciencia Mat, Madrid 28049, Spain

来源：

APPLIED SPECTROSCOPY | 2000年 / 54卷 / 04期

关键词：

infrared reflectance; dielectric constant; effective medium approximation; particle shape;

D O I：

10.1366/0003702001949843

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The reflectance spectra of compact aggregates made of optically-uniaxial microparticles substantially change with the axial ratio of the particles. The variations in the spectra were successfully explained by an effective medium approximation, through which the infrared reflectance spectra could be calculated for pressed aggregates of spheroidal particles of different shapes, in which the optic axis is parallel to the axis of revolution. The experimental check was carried out on the anisotropic material, α-Fe2O3, with reasonably good agreement for several shapes studied.

引用

页码：634 / 638

页数：5

共 18 条

[1] ADSORPTION OF POTENTIAL-DETERMINING IONS AT FERRIC OXIDE-AQUEOUS ELECTROLYTE INTERFACE [J].