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Influence of nitrogen-containing reducing media on the optical and luminescence characteristics of sapphire

机译:含氮还原剂对蓝宝石光学和发光特性的影响

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The optical and luminescence characteristics of sapphire crystals grown in nitrogen-containing reducing media based on CO have been investigated. It is shown that the nitrogen dissolution in the oxygen sublattice of sapphire under reducing conditions is accompanied by the formation of F~+ centers and aggregate F_2 centers (defects that significantly influence the optical absorption and X-ray-, photo-, and thermolumi- nescence in sapphire). It is established that the formation of Al2O3:N occurs at fairly low nitrogen concentra- tions in the growth medium (10-20 vol % when a crystal is grown at P ? 0.2 Torr and 1 vol % when growth is carried out at P = 800-950 Torr).
机译:研究了在基于CO的含氮还原介质中生长的蓝宝石晶体的光学和发光特性。结果表明,在还原条件下,蓝宝石氧亚晶格中氮的溶解伴随着F〜+中心和聚集F_2中心的形成(这些缺陷会显着影响光吸收以及X射线,光和热发光。蓝宝石的无光)。可以确定的是,Al2O3:N的形成发生在生长介质中的氮浓度较低时(当晶体在P≥0.2 Torr下生长时为10-20 vol%,而在P = 0.2时生长为1 vol%)。 800-950托)。

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