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dc.contributor.author박종완-
dc.date.accessioned2016-09-12T01:18:23Z-
dc.date.available2016-09-12T01:18:23Z-
dc.date.issued2015-02-
dc.identifier.citationJOURNAL OF CERAMIC PROCESSING RESEARCH, v. 16, NO 1, Page. 89-92en_US
dc.identifier.issn1229-9162-
dc.identifier.urihttp://jcpr.kbs-lab.co.kr/file/JCPR_vol.16_2015/JCPR16-1/_172014-025_89-92.pdf-
dc.identifier.urihttp://hdl.handle.net/20.500.11754/23096-
dc.description.abstractThe natural topaz having the chemical formula of Al2SiO4(F,OH)(2) exhibits lots of varieties in color and composition. Most of the natural topaz has been mined in colorless. In the work we performed a spectroscopic characterization of natural colorless topaz. The samples were irradiated with 2.5 MeV and 10 MeV electrons to fluencies of 2 x 10(17) cm(-2) for 1 h and were heated at 150 degrees C and 1 h in air. From the experiments, the spectra investigated by UV-visible spectroscopy (UV-Vis), electron paramagnetic resonance (ESR), and wavelength dispersive X-ray fluorescence spectroscopy (WD-XRF). Changes in the colorless sample after irradiation resulted in brown color, which had absorption peaks at 420 and 460 nm. These samples become light blue color after subsequent heat treatment. The samples EPR lines occurred two peaks, a peak near at g = 2.012 substitutional Al3+ ion in a Si4+ site and a peak near at g = 3.5 similar to 4 substitutional Fe3+ in an Al3+ site. After irradiation, the observed that while the peak at g = 3.5 similar to 4 related EPR line are decrease, but the perk at g = 2.012 related defect line show increase.en_US
dc.language.isoenen_US
dc.publisherKOREAN ASSOC CRYSTAL GROWTHen_US
dc.subjectTopazen_US
dc.subjectElectron beamen_US
dc.subjectWD-XRFen_US
dc.subjectUV-Vis spectroscopyen_US
dc.subjectESRen_US
dc.titleSpectroscopic characteristics of topaz: The impact of electron beam irradiation and heat treatmenten_US
dc.typeArticleen_US
dc.relation.no1-
dc.relation.volume16-
dc.relation.page89-92-
dc.relation.journalJOURNAL OF CERAMIC PROCESSING RESEARCH-
dc.contributor.googleauthorShin, Sora-
dc.contributor.googleauthorSeo, Jingyo-
dc.contributor.googleauthorPark, Heeyul-
dc.contributor.googleauthorPark, Jongwan-
dc.relation.code2015002632-
dc.sector.campusS-
dc.sector.daehakCOLLEGE OF ENGINEERING[S]-
dc.sector.departmentDIVISION OF MATERIALS SCIENCE AND ENGINEERING-
dc.identifier.pidjwpark-


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