scholarly journals Luminescent Properties of Y2O3:Eu3+Nanocrystals Prepared by Molten Salt Synthesis

2013 ◽  
Vol 2013 ◽  
pp. 1-4 ◽  
Author(s):  
Lijun Luo ◽  
Fenfen Hu ◽  
Li Xiong ◽  
Xiaofan Li ◽  
Meili Zhou ◽  
...  
Keyword(s):  
Molten Salt ◽  
Room Temperature ◽  
Red Light ◽  
Average Particle Size ◽  
Luminescent Properties ◽  
Molten Salt Synthesis ◽  
Average Particle ◽  
Molten Salt Method ◽  
Red Phosphor ◽  
Red Phosphors

A series of red phosphors Y2O3:Eu3+were prepared by the molten salt method with different surfactants. Their structures, morphologies, and the photoluminescent properties were investigated at room temperature. The particles size of Y2O3:Eu3+can be controlled by adjusting the kinds of surfactants. The phosphor Y2O3:Eu3+prepared with NP-10 [polyoxyethylene (10) nonyl phenyl ether] shows regular morphology and higher crystallinity, and its average particle size is about 200 nm. Bright red light can be observed by naked eyes from the red phosphor under 254 nm excitation.

Molten Salt Synthesis of CaCu3Ti4O12

2008 ◽  
Vol 368-372 ◽  
pp. 115-117 ◽  
Author(s):  
Ke Pi Chen ◽  
Yong He ◽  
Dong Yu Liu ◽  
Zong De Liu
Keyword(s):  
Particle Size ◽  
Molten Salt ◽  
Average Particle Size ◽  
Particle Morphology ◽  
Holding Time ◽  
Molten Salt Synthesis ◽  
Average Particle ◽  
Molten Salt Method ◽  
Particle Size Analyzer ◽  
Size And Morphology

CCTO powders were prepared by using molten salt method in the NaCl-KCl system. The effects of temperature and holding time on phase compositions, particle morphology and size have been investigated by X-ray diffraction, scanning electron microscope and laser particle size analyzer. Using CaCO3, CuO and TiO2 as starting materials, CCTO compound could be synthesized at any temperature from 800oC to 1000oC in the NaCl-KCl system. The average particle size increased obviously with the increasing of temperature above 850 oC. Holding time had great effect on grain size and morphology.

Molten Salt Synthesis of Anisotropy BaBi4Ti4O15 Powders in K2SO4-Na2SO4 Flux

2011 ◽  
Vol 687 ◽  
pp. 333-338 ◽  
Author(s):  
Yong Jun Gu ◽  
Jin Liang Huang ◽  
Li Hua Li ◽  
Ke Zhang ◽  
Xiao Wang ◽  
...  
Keyword(s):  
Activation Energy ◽  
Particle Size ◽  
Molten Salt ◽  
Process Parameters ◽  
Average Particle Size ◽  
Particle Growth ◽  
Molten Salt Synthesis ◽  
Average Particle ◽  
Synthesis Conditions ◽  
Arrhenius Dependence

Anisotropic BaBi4Ti4O15 powder was synthesized by a molten salt synthesis (MSS) method in K2SO4-Na2SO4flux and the effects of different process parameters such as calcining temperature, and ratio of salt to reactant (R) on the phase formation and morphology of anisotropic BaBi4Ti4O15particles were also investigated. The as-synthesized powder calcined at 850-950°C exhibits a single tetragonal BaBi4Ti4O15phase. The morphology of BaBi4Ti4O15powder could be adjusted by changing the synthesis conditions. The average particle size (APS) of BaBi4Ti4O15powder increased with R changing from 0.8 to 1.0, while it decreased with further increasing of R to 1.2. In addition, the APS increased with increasing calcining temperature and it showed an Arrhenius dependence on the temperature. The corresponding apparent activation energy for particle growth is 31.9kJ/mol for calcining temperature of 850-1000°C.

Influences of Progressing Parameters on Flake BaBi4Ti4O15 Powder Synthesized by Molten Salt Synthesis Method

2011 ◽  
Vol 335-336 ◽  
pp. 704-707 ◽  
Author(s):  
Jin Liang Huang ◽  
Li Hua Li ◽  
Yong Jun Gu ◽  
Qian Li
Keyword(s):  
Molten Salt ◽  
Average Particle Size ◽  
Synthesis Method ◽  
Molten Salt Synthesis ◽  
Average Particle ◽  
Reaction Products ◽  
X Ray Diffraction ◽  
Chloride Flux ◽  
X Ray ◽  
Sulfate Flux

Abstract. BaBi4Ti4O15 powder was synthesized by molten salt synthesis (MSS) method in NaCl-KCl and Na2SO4-K2SO4 fluxes. The phases of reaction products and the microstructures at different calcined temperatures were detected by X-ray diffraction (XRD) and scanning electron microscope (SEM). As a result, the flaky BaBi4Ti4O15 powder with anisotropy was synthesized by molten salt synthesis method in NaCl-KCl and Na2SO4-K2SO4 fluxes in the range of 850～1050°C. Compared with BaBi4Ti4O15 powder synthesized in the sulfate flux, the anisotropy level of BaBi4Ti4O15 powder which was synthesized in chloride flux increased, the average particle size(APS) of BaBi4Ti4O15 powder synthesized in the chloride flux is slight larger than in the sulfate flux. The thickness of BaBi4Ti4O15 powder was synthesized by molten salt synthesis method in the chloride flux decreased than in the sulfate.

A New Method for Direct Determination of the Recoilless Fraction with Application to Magnetic Nanoparticles

2002 ◽  
Vol 721 ◽  
Author(s):  
Monica Sorescu
Keyword(s):  
Room Temperature ◽  
Average Particle Size ◽  
Direct Determination ◽  
Average Particle ◽  
Lattice Method ◽  
Recoilless Fraction ◽  
Single Room ◽  
Magnetite Particles ◽  
Physical Mixtures

AbstractWe propose a two-lattice method for direct determination of the recoilless fraction using a single room-temperature transmission Mössbauer measurement. The method is first demonstrated for the case of iron and metallic glass two-foil system and is next generalized for the case of physical mixtures of two powders. We further apply this method to determine the recoilless fraction of hematite and magnetite particles. Finally, we provide direct measurement of the recoilless fraction in nanohematite and nanomagnetite with an average particle size of 19 nm.

Molten Salt Synthesis and Luminescent Properties of YVO4:Ln (Ln = Eu3+, Dy3+) Nanophosphors

2012 ◽  
Vol 12 (1) ◽  
pp. 151-158 ◽  
Author(s):  
Chenglu Liu ◽  
Fang Wang ◽  
Peiyun Jia ◽  
Jun Lin ◽  
Zhiqiang Zhou
Keyword(s):  
Molten Salt ◽  
Luminescent Properties ◽  
Molten Salt Synthesis

MOLTEN SALT SYNTHESIS OF YF3:Yb3+/Ln3+(Ln = Er3+, Tm3+) MICROSHEETS WITH MULTICOLOR UPCONVERSION LUMINESCENCE

2013 ◽  
Vol 06 (06) ◽  
pp. 1350061 ◽  
Author(s):  
MINGYE DING ◽  
CHUNHUA LU ◽  
LINHAI CAO ◽  
YARU NI ◽  
ZHONGZI XU
Keyword(s):  
Molten Salt ◽  
Laser Diode ◽  
Upconversion Luminescence ◽  
Emission Spectra ◽  
Upconversion Emission ◽  
Molten Salt Synthesis ◽  
Molten Salt Method ◽  
Orthorhombic System ◽  
Co Doping ◽  
First Time

In this paper, highly crystalline YF 3: Yb 3+/ Ln 3+( Ln = Er 3+, Tm 3+) microsheets were successfully synthesized by a surfactant-free molten salt method for the first time. The results indicated that the as-obtained samples belonged to orthorhombic system and exhibited microsheets morphology with side lengths of 30 to 80 μm and wall thickness from 1 to 1.5 μm. By changing the dopant's species ( Ln 3+), multicolor (yellow and blue) upconversion emission can be observed in YF 3: Yb 3+/ Ln 3+ microsheets under 980 nm laser diode (LD) excitation. The upconversion mechanisms in co-doping YF 3 samples were analyzed in detail based on the emission spectra. Importantly, this approach not only proposes a new alternative in synthesizing such materials, but also opens the possibility to meet the increasing commercial demand.

scholarly journals Facile molten salt synthesis of Cs–MnO2 hollow microflowers for supercapacitor applications

RSC Advances ◽  
2019 ◽  
Vol 9 (33) ◽  
pp. 19079-19085 ◽  
Author(s):  
Praeploy Chomkhuntod ◽  
Arreerat Jiamprasertboon ◽  
Anurak Waehayee ◽  
Teera Butburee ◽  
Narong Chanlek ◽  
...  
Keyword(s):  
Molten Salt ◽  
Molten Salt Synthesis ◽  
Molten Salt Method ◽  
Supercapacitor Applications

Hollow microflowers of Cs intercalated MnO2 binessite are prepared by a facile molten salt method and tested for supercapacitor electrodes.

Color tunable room temperature phosphorescent carbon dot based nanocomposites obtainable from multiple carbon sources via a molten salt method

Nanoscale ◽  
2019 ◽  
Vol 11 (24) ◽  
pp. 11967-11974 ◽  
Author(s):  
Chan Wang ◽  
Yueyue Chen ◽  
Tantan Hu ◽  
Yong Chang ◽  
Guoxia Ran ◽  
...  
Keyword(s):  
Charge Density ◽  
Molten Salt ◽  
Room Temperature ◽  
Carbon Sources ◽  
Molten Salt Method ◽  
Carbon Dot ◽  
Long Wavelength ◽  
Color Tunable ◽  
Long Lifetime

The structural confinement and charge density engineering of molten salt endorsed CD-based room temperature phosphorescent (RTP) nanocomposites with long-lifetime, long-wavelength and excitation-dependent RTP.

Molten salt synthesis and luminescent properties of nearly spherical YAG:Ce phosphor

2015 ◽  
Vol 30 ◽  
pp. 92-97 ◽  
Author(s):  
Yujun Liang ◽  
Dongyan Yu ◽  
WenZhu Huang ◽  
Mengfei Zhang ◽  
Guogang Li ◽  
...  
Keyword(s):  
Molten Salt ◽  
Luminescent Properties ◽  
Molten Salt Synthesis
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