Heat Treatment of Red-Corundum in Yuanjiang of Yunnan

• 责任者：Ye Dong (Faculty of Materials Science and Engineering ; Kunming University of Science and Technology ; Kunming 650093 ; China) ; Liu Xueliang
• 刊名：Journal of Guilin University of Technology
• 出版年：2010
• 卷期：30(3)
• 关键词：刚玉 ; corundum ; 热处理 ; heat treatment
• 页码：p.339-342
• 图表：6 illus., 10 refs.
• 分类号：0700
• issnNo：ISSN1674-9057
• isbnNo：CN45-1375/N

In heat treatment experiments, red corundum samples before and after heat treatment are analyzed by UV-VIS absorption spectra. Under the heat of 1 350~1 580 ℃, oxygen gas atmosphere, Al(OH)₃ and anhydrous borax as fluxs, the parti-colour of the samples such as purple, or yellow are declined with purer red. The inclusions melt and diffuse by heating; the flux can be filled with fissures in higher transparency. Thus Yuanjiang red corundum can be changed into a more perfect ruby by the heat treatment.