排序方式: 共有40条查询结果,搜索用时 0 毫秒
2.
伴随着科技的飞速发展,在人们的日常生活中已经越来越离不开电能了。所以,经过使用各式各样的方法措施改善发电体系,让发电体系可以展现出最大发电性能,是人们现在急需处理的主要问题之一。水轮设备导水构造是发电体系中最关键的构成部分,是发电体系可以正常运转的基本条件,因此为了提升发电体系的发电情况,一定要适当改善水轮设备。文章对水轮设备导水设施进行了深入的探索,同时提出了一些个人建议,希望能够在水轮设备导水设施改进中带来帮助。 相似文献
3.
A kind of fine and quasi-spherical Y2O3:Eu^3+ phosphor was prepared by firing a preparative precursor at 1 200 ℃ for 2 h with the molten salts of Na2CO3, S and NaCl. The precursor was obtained by homogeneous precipitation of yttrium and europium with oxalic acid when using EDTA, citric acid or starch as complexant. The structure and morphology of the phosphors were characterized by XRD and SEM, respectively. The influence of complexing environment, firing temperature and molten salts on formation of the phosphor Y2O3:Eu^3+ was discussed. The result show that the prepared Y2O3:Eu^3+ phosphor is of quasi-spherical structure with size of 2-3 μm. Its luminescent intensity is 30% higher than that of the same phosphor prepared by the same procedure but without molten salts, and is 5% higher than that of commercial Y2O3:Eu^3+ red phosphor. 相似文献
4.
5.
7.
9.
10.