The study of crystal-phase composition and pore structure for Dicaoqing-Zisha compared with porcelain and pottery

In-situ composite of Al2O3/Fe-Al with Al2O3 fibers were prepared by partial oxidation of oxygen to Fe powder and Al power, crystal phase composition and elemental composition were analyzed by XRD, NORAN. The results indicated that, the crystal composition is determined by Aluminum content, when the content is enough, FeAl3, Al and Al2O3 will be gain, on the contrary, Fe2Al, FeAl, Fe3Al and Al2O3 will be gain; Al2O3 fibers were synthesized via VLS process, the quantity of Al2O3 fibers increased with the Al content, the whisker’s diameter was improved with increasing of sintering temperature.

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Control of the Crystal Phase Composition of FexOy Nanopowders Prepared by CO2 Laser Vaporization

Crystal Growth & Design ◽

10.1021/cg4010533 ◽

2013 ◽

Vol 13 (11) ◽

pp. 4868-4876 ◽

Cited By ~ 17

Author(s):

Christian Stötzel ◽

Heinz-Dieter Kurland ◽

Janet Grabow ◽

Silvio Dutz ◽

Eberhard Müller ◽

...

Keyword(s):

Phase Composition ◽

Co2 Laser ◽

Crystal Phase ◽

Laser Vaporization

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Effect of pore-forming agent quantity on pore structure, phase composition, micro-hardness of gradient bioceramic coatings under optimal laser process parameters

Ceramics International ◽

10.1016/j.ceramint.2020.01.153 ◽

2020 ◽

Vol 46 (8) ◽

pp. 11275-11281

Author(s):

Huaizhang Gu ◽

Qi Fu ◽

Bo Sheng ◽

Enpei Cai ◽

Geng Tang ◽

...

Keyword(s):

Phase Composition ◽

Pore Structure ◽

Process Parameters ◽

Micro Hardness ◽

Laser Process ◽

Structure Phase ◽

Bioceramic Coatings

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Influence of Different Solvents and High-Electric-Field Cycling on Morphology and Ferroelectric Behavior of Poly(Vinylidene Fluoride-Hexafluoropropylene) Films

Materials ◽

10.3390/ma14143884 ◽

2021 ◽

Vol 14 (14) ◽

pp. 3884

Author(s):

Till Mälzer ◽

Lena Mathies ◽

Tino Band ◽

Robert Gorgas ◽

Hartmut S. Leipner

Keyword(s):

Phase Composition ◽

Electric Field ◽

Surface Structure ◽

Electric Fields ◽

Vinylidene Fluoride ◽

High Electric Field ◽

Crystal Phase ◽

Shielding Effect ◽

Ferroelectric Behavior ◽

Field Cycling

P(VdF-HFP) films are fabricated via a solution casting doctor blade method using high (HVS) and low (LVS) volatile solvents, respectively. The structural properties and the ferroelectric behavior are investigated. The surface structure and crystal phase composition are found to be strongly dependent on the type of solvent. LVS leads to a rougher copolymer surface structure with large spherulites and a lower crystallinity in contrast with HVS. The crystalline phase of copolymer films fabricated with HVS consists almost exclusively of α-phase domains, whereas films from LVS solution show a large proportion of γ-phase domains, as concluded from Raman and X-ray diffraction spectra. Virgin films show no ferroelectric (FE) switching polarization at electric field amplitudes below 180 MV/m, independent of the solvent type, observed in bipolar dielectric displacement—electric field measurements. After applying electric fields of above 180 MV/m, a FE behavior emerges, which is significantly stronger for LVS films. In a repeated measurement, FE polarization switching already occurs at lower fields. A shielding effect may be related to this observation. Additionally, Raman bands of polar γ-phase increase by high-electric-field cycling for the LVS sample. The solvent used and the resulting crystal phase composition of the virgin sample is crucial for the copolymer behavior during bipolar electrical cycling.

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Effect of silicon dioxide on the formation of the phase composition and pore structure of titanium dioxide with the anatase structure

Kinetics and Catalysis ◽

10.1134/s002315840905019x ◽

2009 ◽

Vol 50 (5) ◽

pp. 760-767 ◽

Cited By ~ 15

Author(s):

G. A. Zenkovets ◽

V. Yu. Gavrilov ◽

A. A. Shutilov ◽

S. V. Tsybulya

Keyword(s):

Titanium Dioxide ◽

Phase Composition ◽

Silicon Dioxide ◽

Pore Structure ◽

Anatase Structure

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Preparation of Fly Ash-Based Porous Ceramic with Alumina as the Pore-Forming Agent

Ceramics ◽

10.3390/ceramics2020023 ◽

2019 ◽

Vol 2 (2) ◽

pp. 286-295

Author(s):

Yulong Yang ◽

Fengli Liu ◽

Qibing Chang ◽

Zhiwen Hu ◽

Qikun Wang ◽

...

Keyword(s):

Phase Composition ◽

Fly Ash ◽

Mechanical Strength ◽

Pore Structure ◽

Pore Size ◽

Bending Strength ◽

Low Cost ◽

Porous Ceramic ◽

Alumina Content ◽

On Line

Low-cost porous ceramic from fly ash with alumina as the pore-forming agent was produced. The effect of the alumina content on line shrink, bulk density, mechanical strength, porosity, and phase composition of porous ceramic were investigated in detail. The results showed that the addition of alumina can help to improve the porosity and then it can change the pore structure of porous ceramic. Meanwhile, the addition of alumina can react with SiO2 in fly ash which can form the mullite. With the increase of alumina content, the content of quartz decreased gradually, while the alumina and mullite increased. Furthermore, the pore size becomes uniform and the permeability increased gradually. After sintering at 1250 ℃ for 0.5 h, the porous ceramic has been obtained the bending strength of ≥ 35MPa and the porosity of ≥ 28% with the addition content of alumina (25 wt%).

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Effect of Hydrothermal Process on Xonotlite Crystal

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.382.379 ◽

2011 ◽

Vol 382 ◽

pp. 379-383 ◽

Cited By ~ 3

Author(s):

Fei Liu ◽

Xiao Dan Wang ◽

Jian Xin Cao

Keyword(s):

Phase Composition ◽

Aspect Ratio ◽

Spherical Particle ◽

Hydrothermal Process ◽

Crystal Phase

Effect of hydrothermal process on xonotlite crystal prepared from K2SiO3 and H2SiO3 respectively in CaO-SiO2-H2O system was researched in this paper. The crystal phase composition and morphology of the xonotlite crystal were analyzed using XRD and techniques. The results indicate that different hydrothermal process poses significant impact on the microstructure of xonotlite crystal. The xonotlite spherical particle with the diameter of 10-20 µm was prepared from H2SiO3 only via dynamic hydrothermal process. The xonotlite whisker prepared from K2SiO3 with the length of 20-40 μm, diameter of 400 nm and the aspect ratio of 50-100 was successfully prepared from K2SiO3 via dynamic hydrothermal process, while with the length of 5-10 μm, diameter of 500 nm and the aspect ratio of 10-20 via static hydrothermal process.

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