Optical and infrared reflectance of metal-insulator composites
Conference
·
· AIP (Am. Inst. Phys.) Conf. Proc.; (United States)
OSTI ID:6897347
The reflectance in the infrared and visible (0.08 to 3.2 eV) has been measured for aluminum small particles compacted into potassium chloride. The aluminum particles were prepared by evaporation in inert gas atmosphere and had mean diameters of 200 A and 600 A. The volume fraction, f, of metal in the samples studied was between f = 0.03 and f approximately 1. For f approximately 0.15 the specimens exhibited finite dc conductivity. The main feature of the data is a decreasing reflectance with increasing frequency. The magnitude of the reflectance increases with metal concentration. Comparison of experiment with simple theories shows that the self consistent theory predicts the general form of the reflectance if the low concentration for first achieving conduction is taken into consideration. Kramers-Kronig inversion of the reflectances yields frequency dependent conductivities which are not like those of a simple metal.
- Research Organization:
- Ohio State Univ., Columbus
- OSTI ID:
- 6897347
- Report Number(s):
- CONF-770925-
- Conference Information:
- Journal Name: AIP (Am. Inst. Phys.) Conf. Proc.; (United States) Journal Volume: 40
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360603* -- Materials-- Properties
ALKALI METAL COMPOUNDS
ALUMINIUM
CHLORIDES
CHLORINE COMPOUNDS
CORRELATIONS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
ELEMENTS
HALIDES
HALOGEN COMPOUNDS
INFRARED RADIATION
KRAMERS-KRONIG CORRELATION
METALS
MICROSPHERES
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
POTASSIUM CHLORIDES
POTASSIUM COMPOUNDS
RADIATIONS
REFLECTIVITY
SINTERED MATERIALS
SURFACE PROPERTIES
360603* -- Materials-- Properties
ALKALI METAL COMPOUNDS
ALUMINIUM
CHLORIDES
CHLORINE COMPOUNDS
CORRELATIONS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
ELEMENTS
HALIDES
HALOGEN COMPOUNDS
INFRARED RADIATION
KRAMERS-KRONIG CORRELATION
METALS
MICROSPHERES
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
POTASSIUM CHLORIDES
POTASSIUM COMPOUNDS
RADIATIONS
REFLECTIVITY
SINTERED MATERIALS
SURFACE PROPERTIES