摘要
蓝宝石的吸收光谱是由Ｆｅ３＋，Ｆｅ２＋晶体场谱，Ｆｅ２＋－Ｔｉ４＋，Ｆｅ２＋－Ｆｅ３＋荷移谱等组成。蓝宝石呈色是这些金属离子的ｄ－ｄ电子跃迁和电荷转移等因素共同作用的结果。在高温条件下，采用氧化或还原作用，通过铁、钛等元素间的迁移，达到使浅色蓝宝石变深，深色变浅的目的，从而使蓝宝石颜色得到改善。
The absorption spectrogram of sapphire is composed of the spectrum of Fe 3+ , Fe 2+ crystal field and Fe 2+ -Ti 4+ , Fe 2+ -Fe 3+ intervalence charge transfer process. The coloration of sapphire is caused as a result of the d-d electron transition and IVCT process. The mechanism of lightening darken the color for developing the quality of sapphire can be made by means of the migration of the element of iron and titanium under oxidation and reduction in high temperature.
出处
《桂林工学院学报》
1998年第4期343-345,共3页
Journal of Guilin University of Technology
关键词
蓝宝石
吸收光谱
改色机理
颜色
sapphire
absorption spectrum
coloration
mechanism
