Aranmula mirror is a typical speculum metal mirror, cast and polished according to traditional techniques from Kerala in Southern India. We report our experimental investigations on detailed elemental chemical compositions, chemical surface structure, surface morphology, thermal stability, and optical reflectance of Aranmula metal mirror. The results of EDS based elemental chemical composition studies at the reflecting surface of cast, thin film coated and powder form of mirror samples have revealed the use of Arsenic (As), Silver (Ag), Gold (Au), Iron (Fe), Phosphorous (P), Sulphur (S) and Zinc (Zn) as minor constituents in Aranmula mirror making. The detailed surface structure and morphology of the mirror sample is studied for the first time using XRD and AFM. The Combined use of EDS, AFM and XRD analysis of the mirror samples reveal the presence of a transparent, non-metallic, corrosion resistant, smooth, nano structured thin film layer mainly consisting of a tin enriched delta phase (Cu_31 Sn_8) on the mirror surface, which is amorphous in nature. It also suggests that Aranmula metal mirror contains nano-particles that are considered to be quasi-crystalline in nature. We could prepare thin films of cast Aranmula mirror material with significantly higher optical reflectance for the first time. The average optical reflectance of the cast Aranmula mirror sample in the visible region is found to increase by 10 % when it is prepared in the form of thin film.
Comments: 12 Pages. Presented in International Conference on Quantum Optics and Photonic during Feb 2016 at Ernakulam,Kerala India
[v1] 2016-04-20 12:18:14
Unique-IP document downloads: 128 times
Vixra.org is a pre-print repository rather than a journal. Articles hosted may not yet have been verified by peer-review and should be treated as preliminary. In particular, anything that appears to include financial or legal advice or proposed medical treatments should be treated with due caution. Vixra.org will not be responsible for any consequences of actions that result from any form of use of any documents on this website.
Add your own feedback and questions here:
You are equally welcome to be positive or negative about any paper but please be polite. If you are being critical you must mention at least one specific error, otherwise your comment will be deleted as unhelpful.