摘要：以Ca-Si-Al-O玻璃为主要原料,通过添加Eu2O3,采用碳热还原氮化法合成出Ca-α-Si Al ON∶Eu荧光粉体。借助X...以Ca-Si-Al-O玻璃为主要原料,通过添加Eu2O3,采用碳热还原氮化法合成出Ca-α-Si Al ON∶Eu荧光粉体。借助X射线衍射仪（XRD）、扫描电子显微镜（SEM）、紫外-可见分光光度计和荧光分光光度计等手段,对合成Ca-α-Si Al ON∶Eu的物相组成、显微结构及发光性能进行表征。结果表明：（1）以Ca O,Al2O3,Si O2为原料,合成的Ca-SiAl-O非晶玻璃具有Si O4四面体与Al O4四面体相互连接的架状结构;（2）以Ca-Si-Al-O玻璃为主要原料,通过添加Eu2O3,在1450℃碳热还原氮化合成出呈棱柱状形貌的Ca-α-Si Al ON粉体,其中Eu离子在Ca-α-Si Al ON中实现了良好的固溶;（3）合成的Ca-α-Si Al ON∶Eu在紫外-可见光部分具有较强的吸收,在420 nm的激发下,发射光谱的峰值波长为～570 nm,实现了黄绿光发射,归属于Eu^2＋的4f^65d-4f^7跃迁。显示全部
摘要：将纳米锑掺杂氧化锡（antimony doped tin oxide,ATO）分散于乙醇与水的混合改性介质中,利用硅烷偶联剂KH-5...将纳米锑掺杂氧化锡（antimony doped tin oxide,ATO）分散于乙醇与水的混合改性介质中,利用硅烷偶联剂KH-570与纳米ATO表面羟基的脱水反应以及硅烷偶联剂间的缩合反应,制得了KH-570包覆的纳米ATO粉体。用FTIR、XPS、TG、TEM对纳米ATO粉体的表面结构进行了表征,并通过亲油性的测试,考察了其分散稳定性。结果表明,在ATO纳米粒子表面接枝上了7.36%～7.73%（质量分数）的KH-570,改性后的纳米ATO粒子的亲油性及分散性得到大幅度提高,改性ATO在正丁醇中能够稳定分散100 h以上。显示全部
摘要：A series of red emitting ZnTiO3 phosphors co-doped with Eu3+ and alkali metal ions（Li+, Na+ and K+...A series of red emitting ZnTiO3 phosphors co-doped with Eu3+ and alkali metal ions（Li+, Na+ and K+） was prepared by sol-gel method. The crystal structure of the phosphors was investigated by using X-ray diffraction（XRD） and transmission electron microscopy（TEM） after annealing at 700 ℃. The results show that the crystal structure belongs to the hexagonal phase of ZnTiO3 with space group R-3:R. The influence of site occupancy of different alkali metal ions on the emission of ZnTiO3:Eu3+ phosphors was investigated in detail. The emission intensity was significantly enhanced by introducing alkali metal ions. In contrast to Eu3+ singly doped ZnTiO3, the red emission intensities of ZnTiO3:Eu3+ with 4 mol% alkali metal ions（Li+, Na+, K+） were enhanced by about 2.1, 1.7 and 1.4 times, respectively. In addition, the Commission Internationale Ed I’eclairage（CIE） chromaticity coordinates of ZnTiO3:Eu3+, Li+（0.672, 0.328） are quite similar to the National Television Standard Committee（NTSC） standard values for the red（0.670, 0.380）.显示全部
