NaxSr1-2xMoO4∶Eux^3＋的制备及其发光性能的研究

采用高温固相法结合电荷补偿方式2Sr2＋→Eu3＋＋Na＋,合成了适合白光LED的红色荧光材料NaxSr1-2xMoO4∶Eux^3＋（x=0.1、0.15、0.2,0.25、0.3）系列样品.对样品分别进行了X射线衍射（XRD）分析和荧光光谱的测定.测试结果表明,NaxSr1-2xMoO4∶Eu3x＋荧光粉可以被近紫外光（UV）（393 nm）和蓝光（463 nm）有效激发.通过探讨Na＋和Eu3＋的掺杂浓度对发光强度的影响,得出NaxSr1-2xMoO4∶Eux3＋系列样品的发光强度比SrMoO4：Eu3＋明显增加,且当掺杂量x=0.2时,NaxSr1-2xMoO4∶Eux3＋系列样品在616 nm处的发光强度最大.分析了NaxSr1-2xMoO4∶Eux3＋系列样品在380 nm紫外光激发下的色坐标,当Na＋和Eu3＋的掺杂量x=0.15时,样品的红色显色最强.     

CCD传感器实时检测系统在微细电火花加工机床上校正法的研究

CCD(Charge-Couple Device)传感器实时检测系统是一套基于光电检测技术的质量监测仪器,可用于实时观测和测量被加工工件,特别适合安装应用于微细电火花加工机床.本文就该系统安装在电火花加工机床上后如何提高检测精度进行研究,提出了3种方法对该检测系统进行校正,如,整体校准常数、C值校正、D值校正.此后设计实验来检验校准后该系统的稳定性和精确度,从而验证了所提出的三步校正法的可靠性.     

CCD传感器实时检测技术在微细电火花加工机床上应用的优势

CCD传感器实时检测系统是一套基于光电检测技术的质量监测仪器,可用于实时观测和测量被加工工件,特别适合安装应用于微细电火花加工机床。此系统利用CCD（Charge-CoupleDevice）传感器对工件进行非接触式测量,提高了微细电火花加工机床的工作效率和质量。此文对这一系统进行讨论,分析了其特点和优越性。     

NaxSr1-2xMoO4:Eu3+x的制备及其发光性能的研究

采用高温固相法结合电荷补偿方式2Sr2+→Eu3+ +Na+,合成了适合白光LED的红色荧光材料NaxSr1-2x MoO4:Eu3+x(x=0.1、0.15、0.2,0.25、0.3)系列样品.对样品分别进行了X射线衍射(XRD)分析和荧光光谱的测定.测试结果表明,NaxSr1-2xMoO4:Eu3+x荧光粉可以被近紫外光(UV)(393 nm)和蓝光(463 nm)有效激发.通过探讨Na+和Eu3+的掺杂浓度对发光强度的影响,得出NaxSr1-2xMoO4:Eu3+x系列样品的发光强度比SrMoO4:Eu3+明显增加,且当掺杂量x=0.2时,NaxSr1-2xMoo4:Eu3+x系列样品在616 nm处的发光强度最大.分析了NaxSr1-2xMoO4:Eu3+x系列样品在380 nm紫外光激发下的色坐标,当Na+和Eu3+的掺杂量x=0.15时,样品的红色显色最强.     

Luminescence investigation of Eu~(3+)-Bi~(3+) co-doped CaMoO_4 phosphor

A series of Eu3+-Bi3+ co-doped CaMoO4 red phosphors were synthesized via the solid-sate reaction method. The crystal structures of the obtained samples were identified by X-ray powder diffraction (XRD). The photoluminescence property was investigated, and the results showed that the intensity of excitation spectra and emission spectra could be changed with different doping ratios of Bi3+/Eu3+. The proposed explanation of these changes was from the energy transfer between Bi3+ and Eu3+ and the unbalanced cha...     

Luminescence investigation of Eu~（3＋）-Bi~（3＋） co-doped CaMoO_4 phosphor

A series of Eu³⁺-Bi³⁺ co-doped CaMoO₄ red phosphors were synthesized via the solid-sate reaction method. The crystal structures of the obtained samples were identified by X-ray powder diffraction (XRD). The photoluminescence property was investigated, and the results showed that the intensity of excitation spectra and emission spectra could be changed with different doping ratios of Bi³⁺/Eu³⁺. The proposed explanation of these changes was from the energy transfer between Bi³⁺ and Eu³⁺ and the unbalanced charge from the substitution of Eu³⁺ and Bi³⁺ for Ca²⁺ in CaMoO₄. The obtained samples are a promising red light emitting phosphor for the needs of different excitation sources with near-UV and blue GaN-based chips.