【摘要】 对采集自云南省元江的天然红色刚玉进行了热处理,结合紫外可见光光谱对处理前后的样品进行测试分析,结果表明:在1 350～1 580℃,氧化气氛及Al(OH)3、无水硼砂作为助熔剂的条件下的热处理工艺,能够改变微量元素铁钛等离子的含量和价态,消除由其产生的紫色调、黄色调及其他杂色调,使红色调纯正;同时热处理会使包裹体发生熔融、扩散,而加入的助熔剂还可以进一步充填裂隙,从而能够达到改善颜色、愈合裂隙以提高红宝石品质的目的。更多还原

【Abstract】 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.更多还原