Detection of microheterogeneity in monolithic oxide glasses
| Autor: | Akio Makashima, Teruo Sakaino |
|---|---|
| Rok vydání: | 1982 |
| Předmět: |
Imagination
Materials science Small-angle X-ray scattering business.industry Scattering media_common.quotation_subject Oxide Electron Condensed Matter Physics Molecular physics Electronic Optical and Magnetic Materials Matrix (chemical analysis) chemistry.chemical_compound Optics chemistry Materials Chemistry Ceramics and Composites Nanometre business Intensity (heat transfer) media_common |
| Zdroj: | Journal of Non-Crystalline Solids. 52:573-580 |
| ISSN: | 0022-3093 |
| DOI: | 10.1016/0022-3093(82)90334-9 |
| Popis: | A microheterogeneity has been detected in monolithic oxide glasses, such as SiO 2 - and GeO 2 -glasses by means of small angle X-ray scattering (SAXS). The heterogeneity in question was estimated to be a few nanometers in size and considered to be small domains with electronic densities a little different from that of the matrix. The SAXS is a useful method to determine the size of particles ranging from about 2 to hundreds of nm, but for glasses it has weak points, for example: (1) the scattering intensity is very weak because of the small difference in the electron densities between the small domains and the matrix; and (2) the intrinsic SAXS intensity curve, in many cases, is masked by the skirt of the main scattering intensty curve the peak of which is observed in the larger angle region. The authors tried to express the skirt by a theoretical equation, and estimated the heterogeneities to be 1.7 and 1.9 nm for SiO 2 - and GeO 2 -glasses, respectively. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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