论文部分内容阅读
掺钕铝酸钇晶体的质量与原料的纯度有着密切的关系,原料的提纯是提高晶体质量的重要环节。在市售的5NY_2O_3中,稀土杂质(如Sm、Dy等)的含量为ppm量级,非稀土杂质的含量比稀土杂质的含量往往高几个数量级,故提纯工作的重点是降低Y_2O_3中的非稀土杂质的含量。我们把K、Na、Ca、Mg、Si和Fe作为特定杂质。高纯Y_2O_3常用草酸沉淀法提纯。我们也曾用此法。此法在沉淀过程中Fe,Ca产生共沉淀(铁尤为严重),提纯效果不好。亚铁是荧光猝灭剂,含量高时,对激光十分有害。因此,必须首先解决
The quality of yttrium-doped yttrium aluminate crystals is closely related to the purity of raw materials. The purification of raw materials is an important part of improving the crystal quality. In commercially available 5NY_2O_3, the content of rare earth impurities (such as Sm, Dy, etc.) is on the order of ppm, and the content of non-rare earth impurities is several orders of magnitude higher than the content of rare earth impurities. Therefore, the emphasis of the purification work is to reduce the non-Y 2 O 3 The content of rare earth impurities. We use K, Na, Ca, Mg, Si and Fe as specific impurities. High purity Y_2O_3 commonly used oxalic acid precipitation purification. We also used this method. This method in the precipitation process Fe, Ca coprecipitation (iron is particularly serious), the purification effect is not good. Ferrous is a fluorescence quencher, high levels, the laser is very harmful. Therefore, we must first solve