کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8948576 | 1645669 | 2018 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
New spectroscopic and diffraction data to solve the vanadium-doped zircon pigment conundrum
ترجمه فارسی عنوان
داده های جدید طیفی و پراکندگی برای حل معضل رنگدانه زیرکون وانادیوم
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
چکیده انگلیسی
The literature on V-doped zircon pigments offers a puzzling situation with unanswered questions about the origin of turquoise colour. In this study, new diffraction (XRPD) and spectroscopic (EPR, EAS) data were obtained on four industrial pigments, whose vanadium content is much higher than samples from previous investigations. Both EPR features and XRPD results indicate the occurrence of tetrahedrally-coordinated V4+ at the zircon interstitial site 16g. EPR spectra at 5â¯K exhibit a structured multiplet attributed to isolated V4+ ions and an exchange-narrowed line resulting by clustering of V4+ ions. The intensity of optical bands is stronger in samples affected by V4+ clusters. However, the turquoise colour stems from the window of transmitted green-bluish light, which depends on both the tail of the main optical band (2Bâ¯âµâ¯2A) and the onset of charge transfer phenomena. Small variations in these two bands readily turn into a chromatic shift from light blue to green.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 38, Issue 15, December 2018, Pages 5234-5245
Journal: Journal of the European Ceramic Society - Volume 38, Issue 15, December 2018, Pages 5234-5245
نویسندگان
Matteo Ardit, Giuseppe Cruciani, Francesco Di Benedetto, Lorenzo Sorace, Michele Dondi,