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.

Molten salt synthesis of nano-sized Li4Ti5O12 doped with Fe2O3 for use as anode material in the lithium-ion battery

RSC Advances ◽  
2014 ◽  
Vol 4 (104) ◽  
pp. 60327-60333 ◽  
Author(s):  
Qingjun Guo ◽  
Shiyan Li ◽  
Heng Wang ◽  
Yuan Gao ◽  
Bing Li
Keyword(s):  
Molten Salt ◽  
Lithium Ion Battery ◽  
Anode Material ◽  
Lithium Ion ◽  
Cycling Stability ◽  
Molten Salt Synthesis ◽  
Molten Salt Method ◽  
Rate Performance ◽  
First Time ◽  
Superior Cycling Stability

Fe2O3 modified Li4Ti5O12 anode material with differing content of Fe2O3 was synthesized for the first time by the molten salt method. The Li4Ti4.8Fe0.2O12 electrode showed the best rate performance and superior cycling stability.

Effect of Molten Salts on Synthesis and Upconversion Luminescence of Ytterbium and Thulium-Doped Alkaline Yttrium Fluorides

2018 ◽  
Vol 766 ◽  
pp. 34-39 ◽  
Author(s):  
Thanataon Pornpatdetaudom ◽  
Karn Serivalsatit
Keyword(s):  
Visible Light ◽  
Molten Salt ◽  
Ultraviolet Light ◽  
Laser Diode ◽  
Molten Salts ◽  
Upconversion Luminescence ◽  
The Other ◽  
Ultraviolet Region ◽  
Molten Salt Method ◽  
Lower Intensity

Upconversion luminescence materials have recently received attentions because of theirs light conversion ability from infrared into visible and ultraviolet light. In this work, alkaline yttrium fluoride doped by ytterbium and thulium (AYF4: 20%Yb3+, 0.5%Tm3+) were synthesized by molten salt method at 400 °C for 2 hours with different eutectic molten salts, i.e. NaNO3-KNO3, NaNO3-LiNO3, KNO3-LiNO3, and NaNO3-KNO3-LiNO3. Pure hexagonal NaYF4 microrods were successfully synthesized using eutectic NaNO3-KNO3 molten salt. Under 980 nm laser diode excitation, upconversion luminescence in both visible and ultraviolet region was clearly observed. On the other hand, for the use of other eutectic molten salts containing LiNO3, the mixed phases of tetragonal LiYF4 and orthorhombic Y6O5F8 were obtained. These powders emitted only visible light with 10 times lower intensity than the hexagonal NaYF4 microrods synthesized using NaNO3-KNO3.

scholarly journals A preliminary investigation of the molten salt mediated synthesis of Gd2TiO5 ‘stuffed’ pyrochlore

MRS Advances ◽  
2021 ◽  
Author(s):  
D. A. Austin ◽  
M. Cole ◽  
M. C. Stennett ◽  
C. L. Corkhill ◽  
N. C. Hyatt
Keyword(s):  
Molten Salt ◽  
Single Phase ◽  
Preliminary Investigation ◽  
Pyrochlore Phase ◽  
Comparative Investigation ◽  
Molten Salt Synthesis ◽  
Control Rods ◽  
First Time ◽  
Conventional Solid State Synthesis ◽  
Nuclear Applications

Abstract Refractory ‘stuffed’ pyrochlores such as Gd2TiO5 are of interest for nuclear applications, including as matrices for actinide disposition and as neutron absorbers in control rods. Here, we report the results of a preliminary comparative investigation of the synthesis of Gd2TiO5 by molten salt and conventional solid-state synthesis. We show that synthesis of Gd2TiO5 proceeds from the pyrochlore phase Gd2Ti2O7 which is first formed as a kinetic product. Molten salt synthesis afforded single phase Gd2TiO5 at 1300 °C in 2 h, via a template growth mechanism, and is effective for the synthesis of these refractory materials. This work demonstrates molten salt mediated synthesis of ‘stuffed’ pyrochlore for the first time. Graphic abstract

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.

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 tetragonal LiYF4:Yb3+/Ln3+ (Ln = Er, Tm, Ho) microcrystals with multicolor upconversion luminescence

CrystEngComm ◽  
2013 ◽  
Vol 15 (30) ◽  
pp. 6015 ◽  
Author(s):  
Mingye Ding ◽  
Chunhua Lu ◽  
Linhai Cao ◽  
Wenjuan Huang ◽  
Yaru Ni ◽  
...  
Keyword(s):  
Molten Salt ◽  
Upconversion Luminescence ◽  
Molten Salt Synthesis

Synthesis and Characterization of Calcium Titanate and Calcium Zirconate Compound Powders by Molten Salt Method

2017 ◽  
Vol 17 ◽  
pp. 88-95 ◽  
Author(s):  
L. John Bercmans ◽  
T. Sornakumar ◽  
A. Harish Kumar ◽  
G. Siva ◽  
G. Venkatesh
Keyword(s):  
Molten Salt ◽  
Binary Systems ◽  
Pulse Discharge ◽  
Dielectric Materials ◽  
Calcium Titanate ◽  
Single Step ◽  
Molten Salt Synthesis ◽  
Molten Salt Method ◽  
Calcium Zirconate

Alkaline earth titanates and zirconates and their binary systems are of interest for their temperature in sensitive dielectric properties. Calcium titanate and calcium zirconate perovskite ceramics find applications in pulse discharge, energy storage and microwave capacitors. These dielectric materials have been used in electric hybrid and fuel cell vehicles. In the present work, fine crystalline compound powders of calcium titanate and calcium zirconate were prepared by a single step molten salt synthesis. Calcium oxide and titanium dioxide/zirconium oxide were used as precursors to obtain the calcium titanate and calcium zirconate compound powders respectively. The prepared calcium titanate and calcium zirconate compound powders were characterized by TGA, FTIR, XRD, SEM and EDS analysis.

Molten salt synthesis of tin doped hematite nanodiscs and their enhanced electrochemical performance for Li-ion batteries

RSC Advances ◽  
2014 ◽  
Vol 4 (62) ◽  
pp. 32781-32786 ◽  
Author(s):  
Rencheng Jin ◽  
LiXia Yang ◽  
Guihua Li ◽  
Gang Chen
Keyword(s):  
Electrochemical Performance ◽  
Molten Salt ◽  
Molten Salt Synthesis ◽  
Molten Salt Method ◽  
Li Ion Batteries ◽  
Lithium Storage ◽  
Li Ion ◽  
Enhanced Electrochemical Performance ◽  
Storage Properties

Sn4+ doped α-Fe2O3 nanodiscs with good lithium storage properties have been prepared by a molten salt method.

Low-Temperature Molten Salt Synthesis of NiWO4 Nanoparticles

2011 ◽  
Vol 311-313 ◽  
pp. 545-548 ◽  
Author(s):  
Yu Jiang Wang ◽  
Yong Gang Wang
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Particle Size ◽  
Molten Salt ◽  
Molten Salt Synthesis ◽  
Molten Salt Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Pure Phase

NiWO4 nanoparticles were successfully synthesized by a molten salt method at 270°C. The as-prepared powders were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM), and exhibited a pure phase NiWO4 with about 50 nm in particle size and uniform nearly-spherical particle shape.

scholarly journals Molten Salt Synthesis of High-Performance, Nanostructured La0.6Sr0.4FeO3−δ Oxygen Electrode of a Reversible Solid Oxide Cell

Materials ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2267
Author(s):  
Xiaodong Zuo ◽  
Zhiyi Chen ◽  
Chengzhi Guan ◽  
Kongfa Chen ◽  
Sanzhao Song ◽  
...  
Keyword(s):  
Molten Salt ◽  
High Performance ◽  
Reaction Medium ◽  
Solid Oxide ◽  
Molten Salt Synthesis ◽  
Electrolysis Cell ◽  
Molten Salt Method ◽  
Assembly Method ◽  
Oxygen Electrodes ◽  
Direct Assembly

Nanoscale perovskite oxides with enhanced electrocatalytic activities have been widely used as oxygen electrodes of reversible solid oxide cells (RSOC). Here, La0.6Sr0.4FeO3−δ (LSF) nanoscale powder is synthesized via a novel molten salt method using chlorides as the reaction medium and fired at 850 °C for 5 h after removing the additives. A direct assembly method is employed to fabricate the LSF electrode without a pre-sintering process at high temperature. The microstructure characterization ensures that the direct assembly process will not damage the porosity of LSF. When operating as a solid oxide fuel cell (SOFC), the LSF cell exhibits a peak power density of 1.36, 1.07 and 0.7 W/cm2 at 800, 750 and 700 °C, respectively, while in solid oxide electrolysis cell (SOEC) mode, the electrolysis current density reaches 1.52, 0.98 and 0.53 A/cm2 under an electrolysis voltage of 1.3 V, respectively. Thus, it indicates that the molten salt routine is a promising method for the synthesis of highly active perovskite LSF powders for directly assembled oxygen electrodes of RSOC.

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