Powrót do 2/20152/2015 pp. 3-8
Wpływ procesu redukcji na właściwości strukturalne i mechaniczne szkieł tlenkowych z grupy (Pb,Bi)-(Si,Ge)-O
Pobierz pełny tekst pdfStreszczenie
The effect of the reduction process in H2 at 380 °C on the microstructure and elemental composition of a glass Bi0.4Pb0.2Si0.4Ox has been investigated. It has been shown that after reduction a clearly separated top layer with a thickness of approx. 50 µm was formed on the surface of the sample. This layer is depleted of oxygen and has higher electrical conductivity than the interior of the glass. It has also been found that some granules of metallic bismuth with a diameter of tens to hundreds of nanometers were formed on the surface of the glass. Furthermore, depletion of lead was observed in these samples in relation to the initial stoichiometry of the glass prior to trial reduction.
Słowa kluczoweoxide glass, reduction, Scanning Electron Microscopy, Energy Dispersive X-Ray Analysis
Literatura1. Kusz, B., Structural and electrical transport studies of reduced in hydrogen surface of bismuth germanate glass, Solid State Communications, 2003, 125, pp. 623–627.
2. Kusz, B., Trzebiatowski, K., Gazda, M., Murawski, L., Structural studies and melting of bismuth nanocrystals in reduced bismuth germanate and bismuth silicate glasses, J. Non-Cryst. Solids, 2003, 10, pp. 137-145.
3. Gackowska, J., Gazda, M., Trzebiatowski, K., Kusz, B., Structure and electric conductivity of reduced lead–germanate, bismuth–germanate and bismuth–silicate glasses modified with potassium, Journal of Non-Crystalline Solids, 2008, 354, pp. 4319–4322.
4. Witkowska A., Rybicki J., Di Cicco A., Structure of partially reduced bismuth–silicate glasses: EXAFS and MD study, Journal of Alloys and Compounds, 2005, 401, pp. 135–144.
5. Trzebiatowski, K., Witkowska, A., Murawski, L., Granular structure in reduced lead-silicate and bismuth-silicate glasses, Molecular Physics Reports, 2000, 27, pp. 115-121.