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

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 single phase CoFe2O4powders

2008 ◽  
Vol 23 (3) ◽  
pp. 138-141 ◽  
Author(s):  
H. B. Yang ◽  
Y. Lin ◽  
F. Wang ◽  
H. J. Luo
Keyword(s):  
Molten Salt ◽  
Single Phase ◽  
Molten Salt Synthesis

scholarly journals Sol-Gel Assisted Molten-Salt Synthesis of Novel Single Phase Y3-2xCa2xTaxAl5-xO12:1%Eu Garnet Structure Phosphors

2021 ◽  
pp. 161889
Author(s):  
Monika Skruodiene ◽  
Ruta Juodvalkyte ◽  
Greta Inkrataite ◽  
Andrius Pakalniskis ◽  
Rimantas Ramanauskas ◽  
...  
Keyword(s):  
Molten Salt ◽  
Single Phase ◽  
Sol Gel ◽  
Molten Salt Synthesis ◽  
Garnet Structure

Molten Salt Synthesis of the Barium Strontium Titanate Ba1-XSrXTiO3 with KOH-KNO3

2011 ◽  
Vol 485 ◽  
pp. 27-30
Author(s):  
Takuya Kuze ◽  
Masashi Higuchi ◽  
Keiichi Katayama
Keyword(s):  
Particle Size ◽  
Molten Salt ◽  
Strontium Titanate ◽  
Barium Strontium Titanate ◽  
Single Phase ◽  
Hot Water ◽  
Molten Salt Synthesis ◽  
Mixed Salt ◽  
Barium Strontium

The synthesis of Ba1-xSrxTiO3(BST) powders was attempted using KOH-KNO3 molten salt. The starting materials, Ba(NO3)2, Sr(NO3)2 ,TiO2,and the mixed salt of KOH-KNO3, were well-mixed. The mixture was heated at 300 to 500°C for 1 hour, and the product was thoroughly washed with de- ionized hot water. When the mixture containing excess TiO2 was used, single-phase BST powders with a particle size of 10~50nm were obtained.

MOLTEN SALT SYNTHESIS OF La2O2SO4 NANOSHEETS AND THEIR LUMINESCENT PROPERTIES WITH Eu3+ DOPING

2013 ◽  
Vol 06 (02) ◽  
pp. 1350019 ◽  
Author(s):  
XIAO-ZHU HUANG ◽  
ZHEN LIU ◽  
YIYI YANG ◽  
YANG TIAN
Keyword(s):  
Molten Salt ◽  
Molten Salts ◽  
Luminescent Properties ◽  
Molten Salt Synthesis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Selected Area Electron Diffraction ◽  
Transmission Electron ◽  
High Resolution Tem ◽  
First Time

Two-dimensional nanosheets of lanthanum oxysulfates ( La2O2SO4 ) are prepared for the first time by a facile, effective molten salt synthesis route at a low temperature (400°C). Transmission electron microscopy (TEM) shows that the nanosheets are 100 nm to 200 nm thick and several micrometers in in-plane size. The intrinsic crystallography of the nanosheets is characterized by X-ray diffraction, high-resolution TEM, and selected area electron diffraction. The composition of the sample is studied by energy dispersive X-ray spectroscopy. The formation process of the nanosheets in molten salts is also investigated. The luminescence properties of the obtained La2O2SO4 nanosheets are investigated by doping with Eu3+ at different concentrations. The nanosheets are found to exhibit good monochromaticity with high color saturation.

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.

scholarly journals A molten salt-based nitridation approach for synthesizing nanostructured InN electrode materials

RSC Advances ◽  
2020 ◽  
Vol 10 (61) ◽  
pp. 37576-37581
Author(s):  
Gani Purwiandono ◽  
Kazuhiro Manseki ◽  
Takashi Sugiura
Keyword(s):  
Molten Salt ◽  
Single Phase ◽  
Electrode Materials ◽  
Nitrogen Sources ◽  
First Time

Single-phase InN nanocrystals were synthesized for the first time by a molten salt-based nitridation approach using InCl3 and LiNH2 as indium and nitrogen sources, respectively.

scholarly journals Comparative investigation of lasing and amplification performance in cryogenic Yb:YLF systems

2021 ◽  
Vol 127 (3) ◽  
Author(s):  
Umit Demirbas ◽  
Martin Kellert ◽  
Jelto Thesinga ◽  
Yi Hua ◽  
Simon Reuter ◽  
...  
Keyword(s):  
Continuous Wave ◽  
Estimation Method ◽  
Laser Cavity ◽  
Comparative Investigation ◽  
Limiting Factor ◽  
Experimental Conditions ◽  
Temperature Estimation ◽  
Transverse Temperature ◽  
First Time

AbstractWe present detailed experimental results with cryogenic Yb:YLF gain media in rod-geometry. We have comparatively investigated continuous-wave (cw) lasing and regenerative amplification performance under different experimental conditions. In the cw lasing experiments effect of crystal doping, cw laser cavity geometry and pump wavelength on lasing performance were explored. Regenerative amplification behavior was analyzed and the role of depolarization losses on performance was investigated. A recently developed temperature estimation method was also employed for the first time in estimating average crystal temperature under lasing conditions. It is shown that the thermal lens induced by transverse temperature gradients is the main limiting factor and strategies for future improvements are discussed. To the best of our knowledge, the achieved results in this study (375 W in cw, and 90 W in regenerative amplification) are the highest average powers ever obtained from this system via employing the broadband E//a axis.

scholarly journals Mechanical and Thermoelectric Properties of Bulk AlSb Synthesized by Controlled Melting, Pulverizing and Subsequent Vacuum Hot Pressing

2019 ◽  
Vol 9 (8) ◽  
pp. 1609 ◽  
Author(s):  
A. K. M. Ashiquzzaman Shawon ◽  
Soon-Chul Ur
Keyword(s):  
Mechanical Properties ◽  
Intermetallic Compound ◽  
Thermoelectric Properties ◽  
Hot Pressing ◽  
Single Phase ◽  
Aluminum Antimonide ◽  
Simple Method ◽  
Group Iii ◽  
Indirect Band Gap ◽  
First Time

Aluminum antimonide is a semiconductor of the Group III-V order. With a wide indirect band gap, AlSb is one of the least discovered of this family of semiconductors. Bulk synthesis of AlSb has been reported on numerous occasions, but obtaining a single phase has always proven to be extremely difficult. This work reports a simple method for the synthesis of single-phase AlSb. Subsequently, consolidation was done into a near single-phase highly dense semiconductor in a form usable for thermoelectric applications. Further, the thermoelectric properties of this system are accounted for the first time. In addition, the mechanical properties of the intermetallic compound are briefly discussed for a possibility of further use.

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