排序方式: 共有3条查询结果,搜索用时 15 毫秒
1
1.
Lei Wang Lin Yuan Yudong Xu Rulong Zhou BingYan Qu Ning Ding Min Shi Bo Zhang Yiqing Chen Yang Jiang Di Wang Junyan Shi 《Applied Physics A: Materials Science & Processing》2014,117(4):1777-1783
A novel phosphor, Mn4+ doped La2LiTaO6, was developed by solid-state reaction method. The luminescent spectra and emission efficiencies of La2LiTaO6:Mn x 4+ (x = 0.001, 0.003, 0.005 and 0.01) were discussed. The effects of co-doped charge compensation ions, M = Mg2+, Ca2+, Na+, were investigated, respectively. The excitation spectra indicated that La2LiTaO6:Mn4+ could be effectively excited by both NUV light and blue light. The emission spectra of the phosphor exhibit a broadband ranging from 670 to 720 nm with the maximum at about 709 nm in deep red region. The co-doping of Mg2+ could significantly improve the luminescent properties of La2LiTaO6:Mn4+. Thus, phosphor La2LiTaO6:Mn4+, Mg2+ can serve as a key component to improve color rendering of blue-chip white-LEDs. 相似文献
2.
研究了在锌系磷化液中添加环保型促进剂-硫酸羟胺与常规促进剂-亚硝酸钠以便在高碳钢表面形成锌系磷化涂层.用X射线衍射分析了磷化涂层的相结构的变化,结果发现,形成的磷化膜主要由Zn3Fe(PO4)2·4H2O(H膜)和Zn2Fe(PO4)2·4H2O(P膜)组 成.运用扫描电镜分析了磷化涂层的显微组织与磷化时间之间的变化规律.四球摩擦实验结果表明,与亚硝酸钠相比,在锌系磷化液中添加硫酸羟胺能有效降低润滑后的磷化涂层的摩擦系数. 相似文献
3.
用固相反应法合成了Sr4Al14O25:M和Sr4Al14O25:(M+Sm3+)(M=Mn4+, Cr3+)荧光粉, 研究了其发光性能.Sm的共掺并没有改变Sr4Al14O25:Cr3+激发带和发射带的位置, 但是显著提高了材料的发光性能;Sm共掺Sr4Al14O25:Mn4+反而降低了发光强度. 对于Cr3+, Sm3+共掺的Sr4Al14O25荧光粉, 呈现了从Sm3+到Cr3+ 的辐射形式的能量传递过程,说明了Sm的共掺对于Sr4Al14O25:Cr3+荧光粉的发光强度提高的原因. 相似文献
1