Eu^(3+)掺杂Zn_(2)SiO_(4)粉体的制备及发光性能研究  

Study on Preparation and Luminescent Properties of Eu^(3+)-Doped Zn_(2)SiO_(4) Powders

作　　者：周海静 曹玉霞[1,2] 郭东洁 王兴涛 ZHOU Haijing;CAO Yuxia;GUO Dongjie;WANG Xingtao(School of New materials and Chemical Engineering,Tangshan University,Tangshan 063000,China;Tangshan Key Laboratory of Micro and Nano Material Preparation and Application,Tangshan 063000,China;Tangshan Hexin Mould Manufacturing Co.,Ltd.,Tangshan 063000,China;Tangshan Lingyin Technology Co.,Ltd.,Tangshan 063000,China)

机构地区：[1]唐山学院新材料与化学工程学院,唐山063000 [2]唐山市微纳米材料制备及应用重点实验室,唐山063000 [3]唐山合鑫模具制造有限公司,唐山063000 [4]唐山市领垠科技有限责任公司,唐山063000

出　　处：《中国陶瓷》2025年第4期38-43,共6页China Ceramics

基　　金：河北省科技计划项目(17211028);唐山市科技计划项目(21130225c)。

摘　　要：采用高温固相法制备了Zn_(2-x)SiO_(4)∶x Eu^(3+)(x=4%、6%、8%、10%)发光粉体,通过扫描电子显微镜(SEM)、X射线衍射仪(XRD)、荧光分光光度计对粉体的显微结构、物相组成和发光性能进行了研究,并探讨了材料的发光机理。结果表明:所制备的粉体为层状结构,其物相组成为纯的Zn_(2)SiO_(4)晶体。在波长为465 nm的光激发下,发射光谱图中存在五个发射峰,分别对应着Eu^(3+)的^(5)D_(0)→^(7)F_(0) (579 nm)、^(5)D_(0)→^(7)F_(1) (592 nm)、^(5)D_(0)→^(7)F_(2) (615 nm)、^(5)D_(0)→^(7)F_(3) (653 nm)和^(5)D_(0)→^(7)F_(4) (703 nm)能级跃迁,其中,在615 nm处的发射峰最强。随着Eu^(3+)掺杂浓度的增加,粉体发光强度先增大后减小,在Eu^(3+)掺量为8%时,粉体的发光强度取得最大值,Eu^(3+)和Eu^(3+)之间的能量传递方式为偶极–偶极相互作用。经计算,Zn_(2-x)SiO_(4)∶x Eu^(3+)(x=4%,6%,8%,10%)发光粉体的色温和颜色纯度均先增大后减小,当Eu^(3+)掺杂浓度为8%时,发光粉体的色温和颜色纯度均最高,粉体所发光为暖红光,颜色纯度最大为86.05%。Zn_(2)-x SiO_(4)∶x Eu^(3+)(x=4%,6%,8%,10%)luminescent powders were prepared by high temperature solid state method.The microstructure,phase composition and luminescent properties of the powders were studied by scanning electron microscopy(SEM),X-ray diffraction(XRD)and fluorescent photometry,and the luminescent mechanism of the materials was explored.The results show that the prepared powder had a layered structure,with a phase composition of pure Zn_(2)SiO_(4) crystal.Under excitation by light at a wavelength of 465 nm,the emission spectra was composed of five characteristic emission peaks,corresponding to 5D0→7F0(579 nm),5D0→7F1(592 nm),5D0→7F2(615 nm),5D0→7F3(653 nm),and 5D0→7F4(703 nm)electronic transitions of Eu^(3+),with the strongest emission peak at 615 nm.As the doping concentration of Eu^(3+)increased,the luminescent intensity of the powders first increased and then decreased,when the the doping concentration of Eu^(3+)was 8%,the luminescent properties of the powder were best.The energy transfer mode between Eu^(3+)and Eu^(3+)is dipole-dipole interaction.Calculations show that the color temperature and purity of the Zn_(2)-x SiO_(4)∶x Eu^(3+)(x=4%,6%,8%,10%)luminescent powders were increased and then decreased.When the doping concentration of Eu^(3+)was 8%,the color temperature and purity of powders were highest,resulting in warm red light with a maximum color purity of 86.05%.

关 键 词：发光材料 Zn_(2)SiO_(4)∶Eu^(3+) 高温固相法 发光性能 

分 类 号：TQ422[化学工程]