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Optical properties of natural pyralspite garnets: The effect of electron beam irradiation

Title
Optical properties of natural pyralspite garnets: The effect of electron beam irradiation
Author
박종완
Keywords
Electron beam; garnet; UV-Vis; FT-IR; EPR
Issue Date
2017-09
Publisher
KOREAN ASSOC CRYSTAL GROWTH
Citation
JOURNAL OF CERAMIC PROCESSING RESEARCH, v. 18, no. 8, page. 617-620
Abstract
Almandine, pyrope and spessartine garnets were investigated. The samples were irradiated with 10 MeV electron energy to fluencies of 2 x 10(17) cm(-2) for one hour. After irradiation, the Cr3+ ion absorption band decreased but the Fe2+ ion increased in the UV-visible and Fourier transform infrared (FT-IR) spectra of pyrope garnets. In the spessartine samples, the absorption bands of Mn2+ decreased but Fe2+ increased. However, there was no significant change in the almandine garnet spectra. Electron paramagnetic resonance (EPR) was used to measure the changes in the electrovalence of the pyrope and spessartine garnets after irradiation. Pyrope garnets exhibited two peaks, a peak near g similar to 1.98 attributed to Cr3+ in the octahedral position and a peak near g similar to 2.01 attributed to Fe3+ in the octahedral position. Spessartine garnets had only one peak near g similar to 2.04, attributed to Fe3+ in the octahedral position.
URI
https://pdfs.semanticscholar.org/86f4/b69d1aa358810055574258dde3f7307e25f0.pdfhttps://repository.hanyang.ac.kr/handle/20.500.11754/115445
ISSN
1229-9162
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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