Low-Temperature Synthesis of Phase-Pure 0D-1D BaTiO3Nanostructures Using H2Ti3O7Templates

2010 ◽  
Vol 2010 (9) ◽  
pp. 1343-1347 ◽  
Author(s):  
Duk Kyu Lee ◽  
In-Sun Cho ◽  
SangWook Lee ◽  
Dong Hoe Kim ◽  
Hyun-Woo Shim ◽  
...  
Keyword(s):  
Low Temperature ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis ◽  
Phase Pure

Ionic Liquid-Based Low-Temperature Synthesis of Phase-Pure Tetradymite-Type Materials and Their Thermoelectric Properties

2020 ◽  
Vol 59 (6) ◽  
pp. 3428-3436 ◽  
Author(s):  
Manuel Loor ◽  
Sarah Salloum ◽  
Patrick Kawulok ◽  
Sepideh Izadi ◽  
Georg Bendt ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Low Temperature ◽  
Thermoelectric Properties ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis ◽  
Phase Pure

scholarly journals Low temperature synthesis route and structural characterization of (Bi0.5A0.5)(Sc0.5Nb0.5)O3 (A = K+ and Na+) perovskites

2018 ◽  
Vol 5 (5) ◽  
pp. 1033-1044 ◽  
Author(s):  
T. Wesley Surta ◽  
Alicia Manjón-Sanz ◽  
Eric Qian ◽  
T. Thao Tran ◽  
Michelle R. Dolgos
Keyword(s):  
Crystal Structure ◽  
Low Temperature ◽  
Structural Characterization ◽  
Structure Determination ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis ◽  
Synthesis And Crystal Structure ◽  
Synthesis Route ◽  
Phase Pure

First report of the phase pure synthesis and crystal structure determination for Bi0.5A0.5(Sc0.5Ta0.5)O3 (A = K+, Na+).

scholarly journals Low Temperature Synthesis of Aegirine NaFeSi2O6: Spectroscopy (57Fe Mössbauer, Raman) and Size/Strain Analysis from X-ray Powder Diffraction

Minerals ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 444 ◽  
Author(s):  
Günther J. Redhammer ◽  
Julian Weber ◽  
Gerold Tippelt ◽  
Gregor A. Zickler ◽  
Andreas Reyer
Keyword(s):  
Low Temperature ◽  
Crystallite Size ◽  
Synthesis Temperature ◽  
X Ray Diffraction ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis ◽  
X Ray ◽  
Cell Parameters ◽  
57Fe Mössbauer ◽  
Phase Pure

Using a low temperature synthesis protocol, it was possible to obtain phase-pure synthetic aegirine (NaFeSi2O6) at temperatures as low as 130 °C, albeit only with rather long synthesis times of ~200 h; at 155 °C, a nano-crystallite shaped phase-pure material is formed after 24 h. These are, to the best of our knowledge, the lowest temperatures reported so far for phase-pure aegirine synthesis. Powder X-ray diffraction (PXRD) was used to characterize phase purity, structural state and microstructural properties (size and strain) of the as-synthesized (130–230 °C) and heat treated (300–900 °C) samples, via Rietveld analysis of powder patterns. Melting was observed at 999 °C. With increasing synthesis temperature, crystallite size linearly increased from 10 nm to 30 nm at 230 °C, while unit cell parameters decreased. The microstrain was very small. Additional heat treatment of as synthesized samples showed that the crystallite size remained rather unaffected up to 700 °C. The lattice parameters, however, already changed at low temperatures and successively became smaller, indicating increasing ordering towards more regular arrangements of building units. This was confirmed by 57Fe Mössbauer spectroscopy, where a distinct decrease of the quadrupole splitting with increasing synthesis temperature was found. Finally, Raman spectroscopy showed that some weakly-developed pre-ordering effects were present in the samples, which appeared to be amorphous in PXRD, while well-resolved spectra appeared as soon as the long-range ordered crystalline state could be found with X-ray diffraction.

scholarly journals Low Temperature Synthesis of Phase Pure MoAlB Powder in Molten NaCl

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 785
Author(s):  
Cheng Liu ◽  
Zhaoping Hou ◽  
Quanli Jia ◽  
Xueyin Liu ◽  
Shaowei Zhang
Keyword(s):  
Low Temperature ◽  
Synthesis Process ◽  
Optimal Conditions ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis ◽  
Fine Powders ◽  
Phase Pure ◽  
Different Shapes ◽  
Reaction Processes ◽  
Spherical Grains

MoAlB fine powders were prepared in molten NaCl from Al, B and Mo powders. The effects of key parameters affecting the synthesis process and phase morphology were examined and the underpinning mechanisms proposed. MoAlB product particles exhibited different shapes/sizes, as follows: spherical grains (1~3 μm), plate-like particles (<5 μm in diameter) and columnar crystals with lengths up to 20 μm and diameters up to 5 μm, resultant from different reaction processes. Phase pure MoAlB was synthesised under the following optimal conditions: use of 140% excess Al and 6 h of firing at 1000 °C. This temperature was at least 100 °C lower than required by other methods/techniques previously reported. At the synthesis condition, Mo first reacted with Al and B, forming Al8Mo3 and MoB, respectively, which further reacted with excess Al to form Al-rich Al–Mo phases and MoAlB. The Al-rich Al–Mo phases further reacted with the residual B, forming additional MoAlB. The molten NaCl played an important role in accelerating the overall synthesis process.

Concentration-driven phase control for low temperature synthesis of phase-pure anatase and rutile titanium oxide

2015 ◽  
Vol 448 ◽  
pp. 280-286 ◽  
Author(s):  
Zhifeng Wang ◽  
Chunyan Xiao ◽  
Shuhei Yamada ◽  
Kohji Yoshinaga ◽  
Xiu R. Bu ◽  
...  
Keyword(s):  
Low Temperature ◽  
Titanium Oxide ◽  
Phase Control ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis ◽  
Phase Pure

Low-temperature Synthesis and Characterizations of LaFeAsO Nanocrystals

2015 ◽  
Vol 30 (12) ◽  
pp. 1273
Author(s):  
ZHANG De-Xing ◽  
SUN Yun-Lei ◽  
ABULIMIT Abuduweli ◽  
CAO Guang-Han
Keyword(s):  
Low Temperature ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis
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