Nanocrystallization of LaF3 in oxyfluoride glass

• Autorzy: Środa M. , Stoch L.
• Konferencja: 6th Seminar Porous Glasses-Special Glasses, PGL 2002, Szklarska Poręba, 22-26.IX.2002 r.
• Języki publikacji: EN

Abstrakty

EN

Crystallization of LaF3 in glasses from the SiO2–Al2O3–Na2O–LaF3 system has been investigated. The structure of this compound makes it a good host for the rare earths. It has been found that the range of chemical compositions of glasses from which ultra-transparent glass-ceramics with LaF3 nanocrystallites can be obtained is very limited. It is determined by crystalochemical factors, in particular by the position of Al and La in the glass structure. The optical proportions between Al2O3, Na2O and LaF3, leading to the effect of nanocrystallization of this fluoride, as well as the temperature and time of ceramization, have been determined. If these proportions are not maintained, the undesirable crystals of nepheline (NaAlSiO4) and LaAl2O3 are formed. It has been found that the crystallization of LaF3 is essentially affected by the kind of the compounds used to introduce La and F into the glass. In the obtained material the dimensions of LaF3 crystallites varied from 20 to 100 nm.

Słowa kluczowe

EN

nanocrystallization; oxyfluoride glasses; nanotechnology

PL

nanokrystalizacja; nanotechnologia

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Optica Applicata
• Rocznik: 2003
• Tom: Vol. 33, nr 1
• Strony: 161--166
• Opis fizyczny: Bibliogr. 4 poz., rys., tab.

Twórcy

autor

Środa M.

• University of Mining and Metallurgy, Faculty of Materials Science and Ceramics, Department o f Glass and Enamels, al. Adama Mickiewicza 30, 30-059 Kraków, Poland

autor

Stoch L.

• University of Mining and Metallurgy, Faculty of Materials Science and Ceramics, Department o f Glass and Enamels, al. Adama Mickiewicza 30, 30-059 Kraków, Poland

Bibliografia

• [1] Wang Y., Ohwaki J., Appl. Phys. Lett. 63 (1993), 3268.
• [2] Tick P.A., [In] 10th International Symposium on Non-Oxide Glasses, June 19-22, 1996, Corning, N.Y, U.S.A.
• [3] Tick P.A., Borrelli N.F., Cornelius L.K., Newhouse M.A., J. Appl. Phys. 78 (1995), 6367.
• [4] Kukkonen L.L., Reaney I.M., Furniss D., Seddon A .B., Phys. Chem. Glasses 42 (2001), 265.