scholarly journals Facile molten salt synthesis of zirconia whiskers

2018 ◽  
Vol 12 (3) ◽  
pp. 257-261 ◽  
Author(s):  
Tao Wang ◽  
Jianmin Liu ◽  
Weihui Jiang ◽  
Guo Feng ◽  
Lifeng Miao ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Molten Salt ◽  
Reaction Temperature ◽  
Molten Salt Synthesis ◽  
Heating Process ◽  
Molten Salt Method ◽  
Sodium Zirconium ◽  
Transmission Electron ◽  
Mixture Phase ◽  
Average Aspect Ratio

ZrO2 whiskers have been synthesized by a facile molten salt method using ZrOCl2 ? 8H2O and Na3PO4 ? 12H2O as the zirconium source and molten salt, respectively. Differential thermal and thermogravimetric analyses, Xray diffraction analysis, field emission scanning electron microscope and transmission electron microscope were employed to characterize the heating process of the precursor mixture, phase composition of the assynthesized ZrO2 whiskers and the effect of reaction temperature on the synthesis of ZrO2 whiskers. The results show that the ZrO2 whiskers synthesized at 900?C have an average aspect ratio of 30 and preferentially grow along [010] direction. The formation of sodium zirconium phosphate [Na9-4xZrx(PO4)3] (x = 1, 2) and the reaction temperature play an important role in the growth of ZrO2 whiskers. This work also suggests an effective route for mass production of high quality ZrO2 whiskers.

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.

Synthesis and Reaction Mechanism of Ti3SiC2 by Molten Salt Method from Ti-Si-Fe Alloy

2018 ◽  
Vol 768 ◽  
pp. 159-166 ◽  
Author(s):  
Jin Hua Zhang ◽  
Si Xiong ◽  
Chang Ming Ke ◽  
Hong Dan Wu ◽  
Xin Rong Lei
Keyword(s):  
Electron Microscope ◽  
Molten Salt ◽  
Raw Materials ◽  
Synthesis Method ◽  
Molten Salt Synthesis ◽  
Synthesis Process ◽  
Molten Salt Method ◽  
Synthetic Temperature ◽  
Chloride Salts ◽  
Titanium Silicon

Titanium silicon carbide (Ti3SiC2) were obtained by molten salt synthesis method using the Ti-Si-Fe alloy extracted from high titania blast furnace slag and natural graphite as the raw materials. The phase composition, microscopic structure of the products were characterized by powder X-ray diffraction, scanning electron microscope and transmission electron microscope. The influence of firing temperature and chloride salts species on the phase and morphology of the products were investigated. The results indicated that the synthetic temperature of Ti3SiC2 by molten salt synthesis method was about 100 °C, which was lower than that without molten salts. The “dissolution-precipitation” mechanism governed the overall molten salt synthesis process. The lamellar Ti3(Si,Al)C2 crystal growth obeyed by a two-dimensional ledge growth mechanism.

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.

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.

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.

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.

Molten salt synthesis, growth mechanism, and photoluminescence of rod chlorapatite microcrystallites

CrystEngComm ◽  
2019 ◽  
Vol 21 (11) ◽  
pp. 1809-1817 ◽  
Author(s):  
Xiao Wen ◽  
Can He ◽  
Bogang Wu ◽  
Ximing Huang ◽  
Zhaohui Huang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Molten Salt ◽  
Growth Mechanism ◽  
Molten Salt Synthesis ◽  
Molten Salt Method ◽  
Air Atmosphere

The molten salt method was used to synthesize chlorapatite microcrystallites with regular shapes and uniform sizes at a relatively low temperature under an air atmosphere.

Synthesis of CdMoO4 Microcrystals by a Molten Salt Method

2012 ◽  
Vol 472-475 ◽  
pp. 2452-2457 ◽  
Author(s):  
Xiao Hui Jiang ◽  
Jun Feng Ma ◽  
Jie Cheng ◽  
Jing Rui Fang ◽  
Yong Sun
Keyword(s):  
Molten Salt ◽  
Molten Salt Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron Microcopy ◽  
Transmission Electron ◽  
Structure Morphology ◽  
Scanning Electron Microcopy ◽  
Pure Phase ◽  
Scanning Electron

Cadmium molybdate (CdMoO4) nanoparticles, cube-like crystallites and octahedral microparticles have been successfully synthesized by a molten salt method at 270°C. The structure, morphology and luminescent property of the resultant powders were characterized by X-ray diffraction (XRD), transmission electron microcopy (TEM), scanning electron microcopy (SEM), and photoluminescence (PL), respectively. The resultant samples are a pure phase of CdMoO4 and without any impurities. PL spectra results show that the optical properties of CdMoO4 particles are strongly relied on their morphologies.

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