Gradient-temperature hydrothermal fabrication of hierarchical Zn2SnO4 hollow boxes stimulated by thermodynamic phase transformation

2016 ◽  
Vol 4 (37) ◽  
pp. 14095-14100 ◽  
Author(s):  
Xiong Liu ◽  
Chaojiang Niu ◽  
Jiashen Meng ◽  
Xiaoming Xu ◽  
Xuanpeng Wang ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Hydrothermal Method ◽  
Thermodynamic Phase

We report a gradient-temperature hydrothermal method to construct hierarchical Zn2SnO4 hollow boxes, and the obtained results are based on phase transformation between metastable ZnSnO3 and stable Zn2SnO4.

Enhanced up-conversion luminescence from NaYF4:Yb,Er nanocrystals by Gd3+ ions induced phase transformation and plasmonic Au nanosphere arrays

RSC Advances ◽  
2016 ◽  
Vol 6 (105) ◽  
pp. 102869-102874 ◽  
Author(s):  
Yangqing Wu ◽  
Shaobing Lin ◽  
Wenyi Shao ◽  
Xiaowei Zhang ◽  
Jun Xu ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Hydrothermal Method ◽  
Au Nanosphere

NaYF4:Yb,Er nanocrystals with different concentrations of Gd3+ ions are prepared via a hydrothermal method.

Preparation, crystal structure and solution-mediated phase transformation of a novel solid-state form of CL-20

CrystEngComm ◽  
2018 ◽  
Vol 20 (11) ◽  
pp. 1553-1563 ◽  
Author(s):  
Bochen Pan ◽  
Leping Dang ◽  
Zhanzhong Wang ◽  
Jun Jiang ◽  
Hongyuan Wei
Keyword(s):  
Crystal Structure ◽  
Phase Diagram ◽  
Phase Transformation ◽  
Solid State ◽  
Polymorphic Transformation ◽  
Thermodynamic Phase Diagram ◽  
Thermodynamic Phase ◽  
State Form

The crystal structure, thermodynamic phase diagram, and polymorphic transformation behaviors of CL-20 acetonitrile solvate are systematically investigated.

Crystallization in Suspensions of “Hard” Colloidal Spheres

1992 ◽  
Vol 289 ◽  
Author(s):  
Bruce J. Ackerson
Keyword(s):  
Phase Transformation ◽  
Volume Fraction ◽  
Particle Volume Fraction ◽  
Solvent Mixture ◽  
Sedimentation Rates ◽  
Particle Volume ◽  
Interparticle Interactions ◽  
Colloidal Spheres ◽  
Thermodynamic Phase ◽  
Pmma Particles

Extended AbstractSubmicron diameter polymethylmethacrylate (PMMA) particles suspended in a solvent mixture of tetralin and decalin have been observed to undergo a crystal to liquid phase transformation as a function of particle volume fraction[1]. This thermodynamic phase transformation and other measurements of the crystal structure [2], sedimentation rates [1], and response of particle microstructure to shear flow [3] suggest hard sphere behavior for the interparticle interactions.

From Ni-based nanoprecursors to NiO nanostructures: morphology-controlled synthesis and structure-dependent electrochemical behavior

2015 ◽  
Vol 39 (1) ◽  
pp. 676-682 ◽  
Author(s):  
Gang Cheng ◽  
Yinan Yan ◽  
Rong Chen
Keyword(s):  
Phase Transformation ◽  
Hydrothermal Method ◽  
Electrochemical Behavior ◽  
Controlled Synthesis

Phase transformation and morphology tailoring of NiO nanostructures employed for supercapacitor electrodes have been achieved using the Ni-based nanostructure precursors synthesized via a facile urea-controlled hydrothermal method.

Effects of Temperature and Mineralizer on In2O3 Crystals Synthesized by Hydrothermal Method

2014 ◽  
Vol 884-885 ◽  
pp. 287-291
Author(s):  
Wen Li Zheng ◽  
Wei Yang
Keyword(s):  
Phase Transformation ◽  
Hydrothermal Method ◽  
Crystalline Phase ◽  
Fill Factor ◽  
Pure Water ◽  
Transformation Rule ◽  
Secondary Crystallization ◽  
Different Temperatures ◽  
Effects Of Temperature

In ( OH )3, InOOH and In2O3crystals were synthesized by hydrothermal method, using pure water, 1mol/L KOH and 5mol/L KOH as mineralizer, the fill factor of 35%, reacted at the temperature of 200°C, 250°C and 350°C respectively, and time of 24 h. The phase transformation rule of In ( OH )3, InOOH and In2O3was studied in different temperatures and mineralizer, and their morphology have been analyzed. When pure water was used, temperature was 200°C , the results showed that In ( OH )3crystalline phase was no obvious transformation and secondary crystallization, the crystal had nonspecific morphology. While temperature was 250°C and 350°C, the In ( OH )3crystal transformed into InOOH. When 1 mol/L KOH and 5 mol/L KOH was used, temperature was 200°C , the In ( OH )3crystal had secondary crystallization. In particular, the largest-scale crystal was about 20 μm, the smallest crystal was less than 200 nm when 5 mol/L KOH was used. InOOH crystal and a small amount of In2O3were obtained in 250°C. When temperature reached 350°C , the In2O3with cubic bixbyite structure was obtained, exposing the faces { 001}, { 010}, { 100} and { 101}, and the length of crystal side was more than 50 μm.

scholarly journals Synthesis of θ-Al2O3 Whiskers with Twins

Metals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 895
Author(s):  
Nan Liao ◽  
Xiaojia Su ◽  
Haiwen Zhang ◽  
Qingguo Feng ◽  
Salvatore Grasso ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Specific Surface ◽  
Hydrothermal Method ◽  
Surface Area ◽  
Tetragonal Phase ◽  
Monoclinic Phase ◽  
Argon Atmosphere ◽  
Molar Ratio ◽  
Average Width ◽  
The Mean

In this work, θ-Al2O3 whiskers with twins were successfully fabricated by a hydrothermal method followed by annealing at 1000 °C in argon atmosphere using Al2(SO4)3·18H2O, CO(NH2)2 and PEG2000 as initial materials. It is confirmed that precursor of AlO(OH) whiskers is suitable to be used for preparing alumina whiskers when the molar ratio of Al3+: CO(NH2)2 is selected to be 1:6. The mean length of obtained whiskers is 1.5 μm and the average width is 0.1 μm. Interestingly, it is found that the as-prepared θ-Al2O3 whiskers consist of twins with (100) plane as the twin surface, which is ascribed to the phase transformation from tetragonal phase (δ-Al2O3) to monoclinic phase (θ-Al2O3) during the annealing. Additionally, the specific surface area of θ-Al2O3 whiskers is measured to be 38.2 m2/g.

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