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报道了山东蓝宝石的部分物理—化学性质和优化处理结果。中子活化分析得出，平均全铁含量约为１％，钛约为０．０４％。穆斯堡尔谱学分析表明，大多数铁处于二价态。高压电子显微镜分析给出四种原生包体：钛铁矿ＦｅＯＴｉＯ２，假板钛矿Ｆｅ２ＴｉＯ５，钙钛矿ＣａＴｉＯ３及非晶态相。优化处理实践证明，经高温氧化处理后，山东蓝宝石的品质能够得到显著改善，表现为透明度提高，颜色变浅。相应的部分内在变化为Ｆｅ２＋／Ｆｅ３＋值降低，非晶态相初晶化，钛铁矿ＦｅＯＴｉＯ２消失，析出钛酸铝Ａｌ２ＴｉＯ５和铁铝氧化物Ａｌ２Ｏ３Ｆｅ２Ｏ３。要获得纯正的蓝色，须严格控制处理温度和相应的氧分压，尽量使Ｆｅ２＋／Ｆｅ３＋值趋近于１。为获得优质蓝宝石，应对黑色本底作深入研究。
Reported some physical-chemical properties of Shandong sapphire and optimize the treatment results. Neutron activation analysis showed that the average total iron content was about 1% and titanium was about 0.04%. Mossbauer spectroscopy shows that most of the iron is in the divalent state. High-pressure electron microscopy analysis gave four primary inclusions: ilmenite FeOTiO2, tombstonite Fe2TiO5, perovskite CaTiO3 and amorphous phases. Optimization shows that after the high temperature oxidation treatment, Shandong sapphire quality can be significantly improved, the performance of increased transparency, lighter color. The internal part of the corresponding part is the decrease of Fe2 + / Fe3 + value, the first phase of amorphous phase crystallizes and the FeOTiO2 of ilmenite vanishes, and the Al2TiO5 aluminum titanate and Al2O3Fe2O3 are precipitated. To obtain a pure blue, the temperature and the corresponding partial pressure of oxygen must be strictly controlled so that the value of Fe2 + / Fe3 + approaches 1. In order to obtain high-quality sapphires, black background should be studied in depth.