Supramolecular Hexagonal Platelet Assemblies with Uniform and Precisely-Controlled Dimensions

2019 ◽  
Vol 141 (39) ◽  
pp. 15498-15503 ◽  
Author(s):  
Gangfeng Chen ◽  
Guangpu Zhang ◽  
Bixin Jin ◽  
Mingyan Luo ◽  
Yunjun Luo ◽  
...  
Keyword(s):  
Hexagonal Platelet

Synthesis, Characterization and Properties of PANI/(La-Nd Doped BaFe12O19) Composites

2017 ◽  
Vol 727 ◽  
pp. 327-334
Author(s):  
Yan Wang ◽  
Jun Wang ◽  
Xiao Fei Zhang ◽  
Ya Qing Liu
Keyword(s):  
Sol Gel ◽  
Network Analyzer ◽  
X Ray Diffraction ◽  
Sem Images ◽  
Structure Morphology ◽  
Xrd Patterns ◽  
Hexagonal Platelet ◽  
Peak Value ◽  
Properties Of Composites

La-Nd co-doped barium hexaferrites, Ba0.7(LamNdn)0.3Fe12O19 (D-BaM), were successfully prepared by sol-gel method. PANI / D-BaM composites were synthesized by in-situ polymerization in solution. The structure, morphology and properties of samples have been characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), vibrating sample magnetometer (VSM), four-probe conductivity tester and vector network analyzer. The XRD patterns showed that the crystal structure of all the samples exist as M-type phases. The SEM images revealed that the particles presented a hexagonal platelet-like morphology. The magnetic properties could be improved by substitutions of La and Nd ions. The saturation magnetization (Ms) and coercive force (Hc) increased with the change of La / Nd ratio to the maximum at La / Nd = 3:1. The doped particles have also been embedded in conductive PANI to prepare electromagnetic materials, and the conductivity kept on the order of 10-2. The microwave absorbing properties of composites at 30 MHz-6 GHz improved obviously, the peak value of reflection loss could reach-7.5 dB.

Hexagonal plate-like magnetite nanocrystals produced in komatiite–H2O–CO2 reaction system at 450°C

2015 ◽  
Vol 14 (4) ◽  
pp. 547-553 ◽  
Author(s):  
Xi-Luo Hao ◽  
Yi-Liang Li
Keyword(s):  
Porous Structure ◽  
Magnetite Nanoparticles ◽  
Organic Molecules ◽  
Reaction System ◽  
Batch Experiments ◽  
Hexagonal Plate ◽  
Magnetite Nanocrystals ◽  
Hexagonal Platelet

AbstractBatch experiments of komatiite–H2O–CO2 system with temperatures from 200 to 450°C were performed to simulate the interactions between the newly formed ultramafic crust and the proto-atmosphere on Earth before the formation of its earliest ocean. Particularly, magnetite nanocrystals were observed in the experiment carried out at 450°C that are characterized by their hexagonal platelet-like morphology and porous structure. Exactly the same set of lattice fringes on the two opposite sides of one pore suggests post-crystallization erosion. The results demonstrate that magnetite could be produced by the direct interactions between the ultramafic rocky crust and the atmosphere before the formation of the ocean on the Hadean Earth. These magnetite nanoparticles could serve as a catalyst in the synthesis of simple organic molecules during the organochemical evolution towards life.

scholarly journals Low-Temperature High-Efficiency Preparation of TiB2 Micro-Platelets via Boro/Carbothermal Reduction in Microwave Heated Molten Salt

Materials ◽  
2019 ◽  
Vol 12 (16) ◽  
pp. 2555 ◽  
Author(s):  
Jie Liu ◽  
Jianghao Liu ◽  
Yuan Zeng ◽  
Haijun Zhang ◽  
Zhi Li
Keyword(s):  
Low Temperature ◽  
Molten Salt ◽  
Carbothermal Reduction ◽  
High Efficiency ◽  
Raw Materials ◽  
Synergistic Effects ◽  
Synthesis Conditions ◽  
Crystalline Nature ◽  
Boron Carbide B4c ◽  
Hexagonal Platelet

A molten-salt and microwave co-facilitated boro/carbothermal reduction methodology was developed for low temperature high-efficiency synthesis of TiB2 powders. By using relatively inexpensive titanium oxide (TiO2), boron carbide (B4C) and amorphous carbon (C) as raw materials, single-phase TiB2 powders were prepared after 60 min at as low as 1150 °C or after only 20 min at 1200 °C. Such synthesis conditions were remarkably milder than those required by the conventional reduction routes using the identical reducing agent. As-synthesized TiB2 powders exhibited single-crystalline nature and well-grown hexagonal-platelet-like morphology. The achievement of low temperature high-efficiency preparation of high-quality TiB2 microplatelets in the present work was mainly attributable to the synergistic effects of molten-salt medium and microwave heating.

Micromagnetic Calculation of Applied Field Effect on Switching Mechanism of a Hexagonal Platelet Particle

1991 ◽  
Vol 30 (Part 1, No. 10) ◽  
pp. 2489-2502 ◽  
Author(s):  
Yasutaro Uesaka ◽  
Yoshinobu Nakatani ◽  
Nobuo Hayashi
Keyword(s):  
Applied Field ◽  
Field Effect ◽  
Switching Mechanism ◽  
Hexagonal Platelet

A Study on Clay Particle Effect to the Mechanical Properties of Pultruded Composites Under Shear Loading

2007 ◽  
Author(s):  
J. Y. Park ◽  
T. Fay ◽  
T. Davis
Keyword(s):  
Mechanical Properties ◽  
Mechanical Behavior ◽  
Glass Fiber ◽  
Polymer Composites ◽  
Shear Loading ◽  
Experimental Program ◽  
Shape Effect ◽  
Particle Effect ◽  
Pultruded Composites ◽  
Hexagonal Platelet

A micromechanical investigation aimed at examining the mechanical behavior of pultruded polymer composites containing hexagonal platelet shaped fillers under shear loading is presented. Micromechanical models that account for the presence of inhomogeneities such as the clay fillers and voids in matrix materials were developed to estimate the inplane shear properties. The analytical results were obtained based on the consideration of shape effect of filler and void, and then were compared with the properties determined by an experimental program. For the experiments, pultruded polymer composites containing clay fillers and voids as well as E-glass fiber and vinylester resin were selected, analyzed and tested under shear loading. The effects of the volume fractions of the constituents on the mechanical properties of the composites were also investigated.

Amino-functionalized SBA-15 type mesoporous silica having nanostructured hexagonal platelet morphology

2006 ◽  
pp. 4131 ◽  
Author(s):  
Sujandi ◽  
Sang-Eon Park ◽  
Dae-Soo Han ◽  
Sang-Cheol Han ◽  
Myung-Jong Jin ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Platelet Morphology ◽  
Hexagonal Platelet

Undoped and Ga-doped hexagonal platelet interconnected ZnS nanowires: Cathodoluminescence and metal–semiconductor electron transport transition

2011 ◽  
Vol 64 (8) ◽  
pp. 761-764 ◽  
Author(s):  
Yen-Chih Chen ◽  
Chao-Hung Wang ◽  
Wei-Ting Chen ◽  
Bi-Hua Li ◽  
Li-Wei Tu ◽  
...  
Keyword(s):  
Electron Transport ◽  
Transport Transition ◽  
Hexagonal Platelet

Micromagnetic Computation of Damping Constant Effect on Switching Mechanism of a Hexagonal Platelet Particle

1993 ◽  
Vol 32 (Part 1, No. 3A) ◽  
pp. 1101-1106 ◽  
Author(s):  
Yasutaro Uesaka ◽  
Yoshinobu Nakatani ◽  
Nobuo Hayashi
Keyword(s):  
Switching Mechanism ◽  
Hexagonal Platelet
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