Preparation of Coralloid α-FeOOH and Discussion on its Crystal Growth Mechanism

2013 ◽  
Vol 834-836 ◽  
pp. 3-7
Author(s):  
Yan Yan Guo ◽  
Hai Bo Wu ◽  
Ming Yu Li ◽  
Shuai Sun
Keyword(s):  
Electron Microscope ◽  
Crystal Growth ◽  
Iron Oxide ◽  
Ferrous Sulfate ◽  
The Novel ◽  
High Quality ◽  
Theoretical Support ◽  
Crystal Growth Mechanism ◽  
Morphology And Structure ◽  
Scanning Electron

We prepared the novel coralloid hierarchical structure of α-FeOOH composed of rod-shaped nanosheets by wet method using ammonia and ferrous sulfate. Through observation by Field emission scanning electron microscope (FESEM), the morphology and structure of α-FeOOH in the process of growth was presented. And the formation mechanism of this coralloid crystal α-FeOOH was studied, in order to provide important theoretical support for the preparation of high quality iron oxide yellow products.

Fabrication and Properties of Lignin/Castor Oil-Based Composites

2011 ◽  
Vol 311-313 ◽  
pp. 1535-1538 ◽  
Author(s):  
Hong Juan Wang ◽  
Hai Yan Xiao ◽  
Feng Qiang Sun ◽  
Jian Hua Zhang
Keyword(s):  
Fourier Transform ◽  
Electron Microscope ◽  
Free Radical ◽  
Composite Materials ◽  
Scanning Electron Microscope ◽  
Castor Oil ◽  
Morphology And Structure ◽  
The Matrix ◽  
Facile Route ◽  
Scanning Electron

Novel bio-based composites were developed from maleate castor oil (MACO) and lignin through free radical initiated copolymerization between MACO and diluent monomer styrene(St). The morphology and structure of the composites were characterized by Fourier transform infrared spectroscope (FTIR) and scanning electron microscope (SEM). The mechanical and thermal behaviors of the composites were investigated, which showed the incorporation of a little of lignin in the castor oil based polymer can enhance the tensile properties of the matrix polymer greatly. This work provides a facile route to prepare bio-based composite materials from castor oil and lignin and can be extended to prepare other bio-based materials from reproducible resources.

Synthesis and Characterization of Y2O3 Nanoflowers

2012 ◽  
Vol 465 ◽  
pp. 76-79 ◽  
Author(s):  
Shuang Zhan ◽  
Xia Li
Keyword(s):  
Fourier Transform ◽  
Phase Composition ◽  
Electron Microscope ◽  
Synthesis And Characterization ◽  
The Novel ◽  
X Ray Diffraction ◽  
Facile Hydrothermal Method ◽  
X Ray ◽  
Scanning Electron

The novel Y2O3 nanoflowers were synthesized through a facile hydrothermal method without using any catalyst or template. The phase composition and the microstructure of as-prepared products were characterized by field emission scanning electron microscope (FE-SEM), X-ray diffraction (XRD) as well as Fourier transform infrared spectrum. The formation mechanism for the Y2O3 flowers has been proposed.

Spot Electron-Beam Lithography as a Novel Method of High Resolution Pattern Nanofabrication

2014 ◽  
Vol 215 ◽  
pp. 459-461
Author(s):  
Alexander S. Samardak ◽  
Margarita V. Anisimova ◽  
Alexey V. Ognev ◽  
Vadim Yu. Samardak ◽  
Liudmila A. Chebotkevich
Keyword(s):  
Electron Beam ◽  
Electron Microscope ◽  
High Resolution ◽  
Scanning Electron Microscope ◽  
Electron Beam Lithography ◽  
The Novel ◽  
Practical Applications ◽  
Novel Method ◽  
20 Nm ◽  
Scanning Electron

We present a novel method of pattern nanofabrication with high resolution and small shape defects using the traditional electron-beam lithography (EBL) or only a scanning electron microscope (SEM). Our method of Spot EBL is extremely fast, highly scalable on big areas, capable of sub-20 nm resolution and fabrication of polymer patterns with complicated shapes. We show the nanostructure images fabricated by Spot EBL and propose practical applications of the novel method.

Molecular Interdiffusion of Hauling Theory between Dissimilar Polymers Based on Novel USW

2011 ◽  
Vol 221 ◽  
pp. 289-294 ◽  
Author(s):  
Guo Hong Zhang ◽  
Jian Hui Qiu ◽  
Liang Shao ◽  
Xie Fu
Keyword(s):  
Tensile Strength ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Polymethyl Methacrylate ◽  
Polymer Chains ◽  
The Novel ◽  
Welding Strength ◽  
Reptation Theory ◽  
Scanning Electron

Based on the novel USW method, the welds of Polylactide (PLA) - Polyformaldehyde (POM) and PLA - polymethyl methacrylate (PMMA) have been carried out. The interdiffusion processes of polymer chains have also been investigated according to the reptation theory and the hauling theory. The welding strengths are carried out by the universal tester and the rupture interfaces are observed using the scanning electron microscope. The best welding strength is 52MPa (90% compared with PLA of the PLA-POM system), which can reach the tensile strength of IPS. The molecules of POM are much easier to inter-diffuse than those of PLA and PMMA.

Durability Airworthiness Verification Connotation Analysis and Compliance Method Investigation for Turbine Blade

2019 ◽  
Vol 795 ◽  
pp. 304-311
Author(s):  
Guang Feng Hu ◽  
Zhen Lei Li ◽  
Duo Qi Shi ◽  
Xiao Guang Yang
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Turbine Blade ◽  
Aircraft Engine ◽  
Sem Analysis ◽  
Limiting Factors ◽  
The Novel ◽  
History Of ◽  
Verification Process ◽  
Scanning Electron

The durability airworthiness verification of turbine blade is one key issue in the process of certifying a type certificate for the aircraft engine. This paper summarizes the limiting factors for turbine blade durability and proposes a compliance method to evaluate the durability life of turbine blade. The typical standards of blade durability were selected and evolution history of the regulations was traced. The regulation contents and differences between CCAR-33 and CS-E were analyzed. A series of compliance methods in airworthiness verification process were discussed in detail. Furthermore, an experimental compliance methodology was proposed to estimate the durability life of turbine blade, considering the damage of creep and fatigue. The novel methodology was verified using the scanning electron microscope (SEM) analysis. These efforts are of great benefit to support the process of obtaining the final type certificate.

Oriented calcium metaphosphate glass-ceramics

1999 ◽  
Vol 14 (10) ◽  
pp. 3983-3987 ◽  
Author(s):  
Yuanzheng Yue ◽  
Ralf Keding ◽  
Christian Rüssel
Keyword(s):  
Growth Rate ◽  
Electron Microscope ◽  
Crystal Growth ◽  
Scanning Electron Microscope ◽  
Crystallization Temperature ◽  
Crystal Orientation ◽  
Glass Ceramics ◽  
Crystal Growth Rate ◽  
Pole Figures ◽  
Scanning Electron

Highly oriented calcium metaphosphate glass-ceramics were obtained directly from the corresponding melt. On the interface between the Ca(PO3)2 melt and an Al2O3 rod, the nucleation could easily be induced. The dependence of the crystal growth rate on the crystallization temperature was determined. The crystal growth rates observed were up to 71 μm/s. The c axes of most crystals were oriented in the direction perpendicular to the surface of the Al2O3 rod as illustrated by scanning electron microscope and pole figures. The degree of crystal orientation increased with increasing crystallization temperature. At higher temperatures (e.g., at 892 °C), even single-crystal-like dendrites were formed.

Pressure Dependence of Crystal Growth in a Bi-Pb-Sr-Ca-Cu-O Superconductor Prepared by Shock Compression

2014 ◽  
Vol 1584 ◽  
Author(s):  
Takaki Kameya ◽  
Shigeya Tomioka ◽  
Hiroshi Kezuka ◽  
Makoto Tsuruoka ◽  
Shunichi Arisawa ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Crystal Growth ◽  
Scanning Electron Microscope ◽  
Shock Compression ◽  
Pressure Dependence ◽  
Oxide Superconductor ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron

ABSTRACTIn this paper, the effect of shock compression on the synthesis of a Bi-based oxide superconductor was investigated. Bi1.85-Pb0.35-Sr1.90-Ca2.05-Cu3.05-Ox calcined powder was shock-compacted around 20 GPa and 30 GPa, and divided specimens were annealed at 845 °C for 1, 6 and 48 hours. The specimens were evaluated by x-ray diffraction and scanning electron microscope.

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