Largely enhanced piezoelectric and luminescent properties of Er doped BST ceramics

RSC Advances ◽  
2015 ◽  
Vol 5 (111) ◽  
pp. 91903-91907 ◽  
Author(s):  
Wei Li ◽  
Zhijun Xu ◽  
Ruiqing Chu ◽  
Zhihua Wu ◽  
Jigong Hao ◽  
...  
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
Luminescent Properties ◽  
Solid State Reaction Method ◽  
Reaction Method ◽  
Bst Ceramics ◽  
Er Doped

Multifunctional Ba1−xTi0.96Sn0.04O3 + x mol% Er (BST-Er) ceramics were prepared using a solid state reaction method.

scholarly journals Synthesis and luminescent properties of novel red-emitting M7Sn(PO4)6:Eu3+(M= Sr,Ba) phosphors

2018 ◽  
Vol 12 (1) ◽  
pp. 8-12
Author(s):  
Guo Feng ◽  
Weihui Jiang ◽  
Jianmin Liu ◽  
Cong Li ◽  
Quan Zhang
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
Red Light ◽  
Luminescent Properties ◽  
Solid State Reaction Method ◽  
Formula Unit ◽  
Conventional Solid State Reaction ◽  
Light Emitting ◽  
Reaction Method ◽  
Uv Leds

Novel Eu3+-activated M7Sn(PO4)6 (where M = Sr, Ba) red-emitting phosphors were synthesized via conventional solid-state reaction method at 1200 ?C for 2 h. The luminescence properties of the prepared samples and quenching concentration of Sr7-xSn(PO4)6 :xEu3+ and Ba7-xSn(PO4)6 :xEu3+ were investigated. These phosphors can be efficiently excited by UV (395 nm) and visible blue (465 nm) light nicely matching the output wavelengths of the near-UV LEDs and InGaN blue LED chips and emit the red light. The critical concentrations of the Eu3+ activator were found to be 0.175mol and 0.21mol per formula unit for Sr7-xSn(PO4)6 :xEu3+ and Ba7-xSn(PO4)6 :xEu3+, respectively. The M7-xSn(PO4)6 :xEu3+ (M = Sr, Ba) phosphor may be a good candidate for light-emitting diodes application.

Effects of Various Fluxes on Synthesis of Deep Red Emitting CaAl12O19:Mn4+ Phosphors

2016 ◽  
Vol 852 ◽  
pp. 454-460 ◽  
Author(s):  
Qiu Hong Zhang ◽  
Hai Yong Ni ◽  
Ling Li Wang ◽  
Fang Ming Xiao
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Solid State Reaction ◽  
Single Phase ◽  
Luminescent Properties ◽  
Solid State Reaction Method ◽  
Luminescent Intensity ◽  
Reaction Method ◽  
Structure Morphology ◽  
Forming Temperature

Deep red emitting CaAl12-xO19:xMn4+ phosphors were synthesized by solid state reaction method. Various fluxes (BaF2, H3BO3, Na2CO3 and NH4Cl) were added in preparation of the phosphors. The influences of the various fluxes on the crystal structure, morphology and luminescent properties of CaAl12O19:Mn4+ phosphors were studied. The results show that the obtained phosphors with fluxes possessed better luminescent intensity than that of the phosphors without fluxes. The maximum luminescent intensities were found with the following order: H3BO3 (2.0 wt%) > Na2CO3 (0.5 wt%) > NH4Cl (0.3 wt%) > BaF2 (0.1 wt%) > no flux. The H3BO3 flux can decrease the single phase forming temperature of CaAl12O19:Mn4+ phosphors by about 150°C.

Influence of Flux on Morphological and Luminescent Properties of Y3Al5O12:Tb3+ Phosphor

2010 ◽  
Vol 663-665 ◽  
pp. 177-182
Author(s):  
Quan Mao Yu
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
Luminescent Properties ◽  
Solid State Reaction Method ◽  
Reaction Method ◽  
Morphology Characteristics

The Y3Al5O12: Tb3+ phosphors are synthesized by solid-state reaction method using fluxes of LiF, NaF, MgF2, AlF3, CaF2, SrF3, KH2PO4 and complex fluxes of LiF+AlF3, KH2PO4+LiF separately. The influence of fluxes on phosphors morphology and luminescent properties are investigated by SEM, HITACHI F-450 photometer and cathodoluminescent photometer. The results indicate that KH2PO4 can improve the morphology characteristics of the phosphors, but LiF, AlF3, NaF, MgF2, SrF3, CaF2 are unavailable. LiF, NaF, AlF3, KH2PO4 can improve the phosphors photoluminescent intensity more than 20 percent and cathodoluminescent intensity more than 10 percent. Using KH2PO4 as flux, excellent luminescent properties and well dispersed ~2 m spherical or sub-spherical YAG: Tb3+ phosphors can be synthesized under 1500 oC.

scholarly journals Photoluminescence Studies of CaAl2O4: EU2+ Blue Phosphors Co-Doped with ND3+ Ion Synthesized by Solid- State Reaction Method

2021 ◽  
Vol 16 (2) ◽  
Author(s):  
Sukhdev Bairagi ◽  
Ghizal F. Ansari ◽  
K.S. Bartwal
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
Earth Metal ◽  
Luminescent Properties ◽  
Solid State Reaction Method ◽  
High Quantum Efficiency ◽  
Phosphor Material ◽  
Reaction Method ◽  
X Ray ◽  
Co Doped

In this work, the polycrystalline CaAl2O4: Eu2+, Nd3+ based blue phosphor was prepared by solid-state reaction method. The rare earth metal ions doped calcium aluminate phosphors have been studied in depth. The high quantum efficiency make them useful for anomalous long phosphorescence, good stability, luminous paints, radiation dosimetry, X-ray imaging, color display, and light emitting diodes. Phase, crystallinity and luminescent properties of the synthesized phosphors were examined by using powder X-ray diffraction (XRD). In the phosphor material, the photoluminescence (PL) spectrum has a broad emission peak of Eu2+ ion in blue region at (λmax = 440 nm) due to the energy transitions between the ground state 4f7 and the excited state 4f65d1 of the Eu2+ ion. This has importance in making the visible phosphor devices from this material. In this study the single dopant phosphors were synthesized; therefore, it is important to improve the long afterglow of the phosphors by codoping. The phosphors of CaAl2O4: Eu2+, Nd3+ had long persistence luminescence. In these phosphors, Eu2+ ions play the role of activators. Whereas Nd3+ ions generate deep traps that lead to the long persistent phosphorescence and act as the co-activators in the phosphors simultaneously. The concentration of Nd3+ ion co-doped has strong influence on the luminescence of phosphor.

Hydrothermal synthesis, structural and luminescent properties of a Cr3+ doped MgGa2O4 near-infrared long lasting nanophospor

RSC Advances ◽  
2016 ◽  
Vol 6 (86) ◽  
pp. 82484-82495 ◽  
Author(s):  
Amba Mondal ◽  
Sourav Das ◽  
J. Manam
Keyword(s):  
Hydrothermal Synthesis ◽  
Solid State ◽  
Hydrothermal Method ◽  
Solid State Reaction ◽  
Near Infrared ◽  
Luminescent Properties ◽  
Solid State Reaction Method ◽  
Reaction Method

A novel near infrared long lasting phosphor MgGa2O4:Cr3+ was successfully prepared by a hydrothermal method and a solid state reaction method.

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