上海国土资源
上海國土資源
상해국토자원
2012年
4期
72~75
,共null页
绿柱石 海蓝宝石 热处理 改色机制 紫外-可见光谱
綠柱石 海藍寶石 熱處理 改色機製 紫外-可見光譜
록주석 해람보석 열처리 개색궤제 자외-가견광보
beryl; aquamarine; heat treatment; mechanism of changing color; UV-VIS spectrum
热处理工艺可使绿柱石类宝石的色泽与透明度增强，从而提高宝石品质和价值。刘新疆阿勒泰地区的海蓝宝石进行热处理实验，分析了热处理过程中温度、气氛、保温时间等因素对改善宝石颜色及透明度的影响，并对热处理前后的紫外一可见光谱特征进行了对比。结果表明，采用石墨为填料，加热温度450℃并保温3h，颜色由原黄绿色转变为海水蓝色，透明度也相应提高，改色效果理想和稳定。热处理及石墨的还原性，使矿物中含有的铁离子价态发生变化，是宝石颜色及光谱特性发生变化的关键。
熱處理工藝可使綠柱石類寶石的色澤與透明度增彊，從而提高寶石品質和價值。劉新疆阿勒泰地區的海藍寶石進行熱處理實驗，分析瞭熱處理過程中溫度、氣氛、保溫時間等因素對改善寶石顏色及透明度的影響，併對熱處理前後的紫外一可見光譜特徵進行瞭對比。結果錶明，採用石墨為填料，加熱溫度450℃併保溫3h，顏色由原黃綠色轉變為海水藍色，透明度也相應提高，改色效果理想和穩定。熱處理及石墨的還原性，使礦物中含有的鐵離子價態髮生變化，是寶石顏色及光譜特性髮生變化的關鍵。
열처리공예가사록주석류보석적색택여투명도증강，종이제고보석품질화개치。류신강아륵태지구적해람보석진행열처리실험，분석료열처리과정중온도、기분、보온시간등인소대개선보석안색급투명도적영향，병대열처리전후적자외일가견광보특정진행료대비。결과표명，채용석묵위전료，가열온도450℃병보온3h，안색유원황록색전변위해수람색，투명도야상응제고，개색효과이상화은정。열처리급석묵적환원성，사광물중함유적철리자개태발생변화，시보석안색급광보특성발생변화적관건。
Heat treatment can enhance the color and transparency of gem-class beryl to improve its quality and value. To test the effects of heat treatment on aquamarine of the Altay region, Xinjiang, we measured the influence of temperature, atmosphere, and holding time on improvements to color and clarity. These effects were quantified by comparing the characteristics of the UV-visible spectrum before and after heat treatment. The results show that the effects of color correction are enhanced and more stable when graphite is used as the filler material, temperature is 450℃, and holding time is 3 hours. This changes the gem color from the original yellow-green to sea blue, and improves transparency. The changes in color and transparency are controlled by the valence state of the iron ions and by reduction of graphite during heat treatment.
