Processing of transparent glass-ceramics by nanocrystallisation of LaF3
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چکیده
منابع مشابه
Processing of transparent glass-ceramics by nanocrystallisation of LaF3
ransparent glass-ceramics have been prepared by heat-treating oxyfluoride glasses in the Na2O–Al2O3–SiO2–LaF3 system. The nanocrystallisation f LaF3 was achieved by controlling time and temperature parameters. Glasses and glass-ceramics were characterised by dilatometry, DTA, XRD nd TEM. The mean crystal size (<20 nm) and the crystal fraction increase with the temperature of heat treatment, whi...
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Transparent 0.1ErF3–0.1YbF3–5LaF3–94.8SiO2 (mol%) glass-ceramics was prepared by sol–gel method. Efficient upconversion emissions at 379, 407, 450, 490, 520, 540 and 660 nm were observed under 973 nm excitation. The signal at 379 nm is only 4.5 times weaker than the signal at 520 nm, that is readily visible by the naked eyes even with a pump power of 27 mW, indicating that this sample is a very...
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in order to fabrication of transparent glass-ceramics with li-mica nano crystals, the glasses with chemical composition of 94.9 mass% li(1+x)mg3alsi3(1+x)f2 (x=0.5) with 5.1 mass% mgf2 were crystallized. the glasses were fabricated via the conventional melt-quenching technique. mica crystals were precipitated in the glass phase by later heat treatment. glass samples had glass transition tempera...
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ژورنال
عنوان ژورنال: Journal of the European Ceramic Society
سال: 2009
ISSN: 0955-2219
DOI: 10.1016/j.jeurceramsoc.2009.05.013