We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
The effect of UV exposure and heat treatment on crystallization behavior of photosensitive glasses.
- Authors
Kıbrıslı, Orhan; Ersundu, Ali Erçin
- Abstract
In this study, photosensitive glasses in the Na2O-ZnO-Al2O3-SiO2 system with photosensitizing agents (cerium, silver, tin, antimony) and halogenides (NaF and KBr) were synthesized through a conventional melt-quenching technique. The crystallization mechanism was investigated for solely heat-treated and UV-exposed + heat-treated samples using differential thermal analysis (DTA), X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDS) and scanning electron microscopy (SEM) techniques to understand the effect of UV exposure on crystallization behavior of photosensitive glasses. Accordingly, non-isothermal DTA measurements were performed at different heating rates to determine crystallization peak, Tp, and onset, Tc, temperatures. For solely heat-treated samples, the kinetic parameters such as the Avrami constant, n, and morphology index, m, were calculated as 1 from the Ozawa method indicating surface crystallization and the value of crystallization activation energy was calculated as 944 kJ/mol using modified Kissinger method. On the contrary, bulk crystallization was found to be predominant for UV exposed + heat-treated samples revealing that UV exposure is the primary cause of bulk crystallization in photosensitive glasses.
- Subjects
CRYSTALLIZATION; PHOTOSENSITIVE glass; PHOTOSENSITIZERS; METALLIC glasses; THERMAL analysis
- Publication
Applied Physics A: Materials Science & Processing, 2018, Vol 124, Issue 5, p1
- ISSN
0947-8396
- Publication type
Article
- DOI
10.1007/s00339-018-1799-7