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Yang, Yunqi (author), Wang, C. (author), Wang, Chengsi (author), Shen, Xibing (author), Yin, Ke (author), Chen, Tao (author), Shen, Andy Hsitien (author), Algeo, Thomas J. (author), Hong, Hanlie (author)In recent years, some sapphires were found to fade in sunlight and to increase their color after UV irradiation. This unstable color phenomenon is attributed to the photochromism of corundum. The photochromic effect seriously affects the grading and evaluation of sapphires, although its mechanism is still uncertain. Here, we performed a set...journal article 2023
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Ahmed, M. M. (author), Kassim, Amaged (author), Ragab, Ayman (author), EL-Razaz, Zeinab (author), Al-Enizi, Abdullah M. (author), Yousef, Ayman (author), Abdelrady, Ahmed (author), El-Naggar, K. A.M. (author)The present investigation involved the production of roof tile samples through the replacement of kaolin clay with varying proportions of Ferrosilicon slag (FS) (0%, 10%, 15%, 20%, and 25% by weight) at different firing temperatures (900 °C, 1000 °C, and 1100 °C). The present study investigated the impact of incorporating FS slag waste on...journal article 2023
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Janssen, G.C.A.M. (author), van der Pers, N.M. (author), Hendrikx, R.W.A. (author), Bottger, A.J. (author), Kwakernaak, C. (author), Rieger, B. (author), Sluiter, M.H.F. (author)Single-crystal copper films on sapphire have recently been reported upon in relation to graphene growth on these films. In the present paper the kinetics of the formation of single crystal copper films is investigated. We demonstrate the importance of heating the sapphire substrate in 1000 hPa oxygen, followed by a fast cooling prior to...journal article 2020