HEAT TREATMENTS OF TANZANIA RUBY AS MONITORED BY ESR SPECTROSCOPY

Autor:	P. Winotai, J. Yaokulbode, T. Wichan, I-Ming Tang
Rok vydání:	2000
Předmět:	Materials science Hexagonal crystal system business.industry Analytical chemistry Statistical and Nonlinear Physics Condensed Matter Physics Ion Atmosphere Optics Electron spin resonance spectrometer Oxygen gas business Spectroscopy Diffractometer Heat treating
Zdroj:	International Journal of Modern Physics B. 14:1693-1700
ISSN:	1793-6578 0217-9792
DOI:	10.1142/s0217979200001576
Popis:	The main purpose of heat treatment is to find the optimum condition to either enchance or reduce the color in order to increase value of ruby. It was found that by heating a slightly bluish Tanzania ruby in oxygen gas atmosphere could lead to a more perfect ruby. While X-ray diffractometer found the maximum decrease in c/a ratio of the hexagonal structure after the heat treatment at 1200°C, the number of Fe 2+ ions converted to Fe 3+ was detected by electron spin resonance spectrometer and found to increase with heating temperatures. These were clearly two factors that reduced blue color in the Tanzania ruby. The best heat treating temperature to enhance the quality of the ruby was at 1300°C.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::66a72d75264990fc028c083aeb9e36c1 https://doi.org/10.1142/s0217979200001576 Zobrazit plný text záznamu