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Correlation between dielectric constant and chemical structure of sodium silicate glasses
- Source :
- Journal of Applied Physics 80:3(Aug1996):1704-1712
- Publication Year :
- 1996
- Publisher :
- AIP Publishing, 1996.
-
Abstract
- The chemical structure of sodium aluminosilicate glasses is determined by high resolution x‐ray photoelectron spectroscopy (XPS) as silicon is gradually replaced by aluminum. A well‐defined chemical state is found for silicon, aluminum, and sodium atoms, while three different environments are identified for oxygen atoms corresponding to Si–O–Si, Si–O–Al, and Si–O–Na bonds. The binding energy of Na 1s photoelectrons increases significantly with increasing aluminum substitution while that of Al 2p and components of O 1s photoelectrons remains approximately constant. Thus, the ionicity of sodium increases with aluminum amount, but the over all electron density around silicon, aluminum, and different types of oxygen atoms remains unchanged. The dielectric constant of the glasses increases with increasing aluminum substitution. It is analyzed in terms of the polarizabilities of constituent structural units, viz., silicon tetrahedra, nonbridging oxygen–sodium ion pairs, and aluminum tetrahedron–sodium ion pairs...
- Subjects :
- inorganic chemicals
010302 applied physics
Silicon
Chemistry
Sodium
Binding energy
technology, industry, and agriculture
Analytical chemistry
General Physics and Astronomy
chemistry.chemical_element
Sodium silicate
02 engineering and technology
Dielectric
021001 nanoscience & nanotechnology
complex mixtures
7. Clean energy
01 natural sciences
Chemical state
chemistry.chemical_compound
X-ray photoelectron spectroscopy
0103 physical sciences
0210 nano-technology
Sodium aluminosilicate
Subjects
Details
- ISSN :
- 10897550 and 00218979
- Volume :
- 80
- Database :
- OpenAIRE
- Journal :
- Journal of Applied Physics
- Accession number :
- edsair.doi.dedup.....e0aa3aceda2aa478a3e387fe01f89126