scholarly journals Morphology Control of Pseudobrookite-Type MgTi2O5 Powders by LiF Doping

2015 ◽  
Vol 46 ◽  
pp. 37-41 ◽  
Author(s):  
Yuta Nakagoshi ◽  
Yoshikazu Suzuki
Keyword(s):  
Liquid Phase ◽  
Phase Formation ◽  
Smooth Surface ◽  
Morphology Control ◽  
Industrial Applications ◽  
Type Structure ◽  
Sem Observation

Well-controlled fine MgTi2O5 powders, with pseudobrookite-type structure, are desired toward various industrial applications, however, commercial powders are hardly available to date. In this study, we focused the processing and characterization of well-controlled MgTi2O5 powders with/without LiF additive. MgCO3 (basic) and TiO2 anatase powders with/without 0.5 wt. % LiF additive were calcined in air at 1100 °C for 2 h to obtain the MgTi2O5 powders. SEM observation revealed that the non-doped MgTi2O5 powder consisted of equiaxed particles with the diameter of 0.5-1.5 μm, whereas, the LiF-doped MgTi2O5 powder consisted of elongated particles with the length of ~ 5-10 μm and the diameter of ~1.0-1.5 μm. The smooth surface of elongated MgTi2O5 particles demonstrates the effect of LiF doping as a flux, i.e., liquid phase formation during the reaction.

Investigation of the solidus boundaries and microstructure in the ZnO–PrO1.5–CoO system

1998 ◽  
Vol 13 (8) ◽  
pp. 2110-2116 ◽  
Author(s):  
Sung-Yong Chun ◽  
Naoki Wakiya ◽  
Kazuo Shinozaki ◽  
Nobuyasu Mizutani
Keyword(s):  
Liquid Phase ◽  
Cobalt Oxide ◽  
Phase Formation ◽  
Solubility Limit ◽  
Liquid Phase Sintering ◽  
Formation Temperature ◽  
System Characterization ◽  
Thermal Phenomena ◽  
Zno Ceramics

ZnO ceramics used as varistors are prepared with cobalt oxide as an essential additive to improve nonohmic properties. Because some of its effects during the liquid-phase sintering remain unexplained, we characterize the liquid-phase formation temperatures and phase reactions in the system ZnO–PrO1.5–CoO. Using differential thermal analysis (DTA) during sintering, we detect new thermal phenomena. An addition of cobalt oxide to ZnO–PrO1.5 mixtures (ZnO–5 mol% PrO1.5–10 mol% CoO) significantly decreases the liquid-phase formation temperature to 1272 ± 5 °C, which is about 110 °C lower compared to those in the ZnO–PrO1.5 system. Characterization of ceramics quenched during sintering allows us to describe an isoplethal section with PrO1.5 contents of 5 mol% and solubility limit of Co in ZnO.

Studies on the electrodeposition and characterization of PTFE polymer inclusion in Ni–W–BN nanocomposite coatings for industrial applications

RSC Advances ◽  
2015 ◽  
Vol 5 (90) ◽  
pp. 74115-74125 ◽  
Author(s):  
S. Sangeetha ◽  
G. Paruthimal Kalaignan
Keyword(s):  
Smooth Surface ◽  
Nanocomposite Coating ◽  
Industrial Applications ◽  
Nanocomposite Coatings ◽  
Friction Resistance

A Ni–W–BN–PTFE nanocomposite coating with excellent corrosion and friction resistance alongside hardness and a smooth surface was developed.

Comparative study and characterization of starches isolated from unconventional tuber sources

2012 ◽  
Vol 32 (8-9) ◽  
pp. 531-537 ◽  
Author(s):  
Germán Ayala Valencia ◽  
Ana Cecilia Agudelo Henao ◽  
Rubén Antonio Vargas Zapata
Keyword(s):  
Proximate Analysis ◽  
Cassava Starch ◽  
Industrial Applications ◽  
Type Structure ◽  
Similar Degree ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Manihot Esculenta Crantz ◽  
Potential Applications

Abstract Some properties of canna (Canna indica L.) and bore (Alocasia macrorrhiza) starches were evaluated and compared using cassava starch (Manihot esculenta Crantz) as a reference. Proximate analysis, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and viscosity measurements were performed. Canna and bore starches showed a similar degree of purity as that of the cassava starch. Canna starch exhibited higher thermal stability and viscosity of solution values than those of bore and cassava starches. XRD spectra showed that canna starch crystallizes as a B-type structure; however, bore and cassava starches crystallize as an A-type structure. Results proved that canna and bore starches are promising bio(materials), obtained from unconventional sources, to be used for industrial applications, as their physicochemical properties are similar to those of cassava starch, which it is known has potential applications in this area.

Synthesis, Characterization, and Dynamic Behavior of Well-defined Dithiomaleimide-functionalized Maltodextrins

2020 ◽  
Vol 17 (2) ◽  
pp. 85-89
Author(s):  
Francisco J. Hidalgo ◽  
Nathan A.P. Lorentz ◽  
TinTin B. Luu ◽  
Jonathan D. Tran ◽  
Praveen D. Wickremasinghe ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Dynamic Behavior ◽  
Industrial Applications ◽  
19F Nmr ◽  
Nmr Studies ◽  
Synthetic Pathway ◽  
End Groups ◽  
Sugar End

: Maltodextrins have an increasing number of biomedical and industrial applications due to their attractive physicochemical properties such as biodegradability and biocompatibility. Herein, we describe the development of a synthetic pathway and characterization of thiol-responsive maltodextrin conjugates with dithiomaleimide linkages. 19F NMR studies were also conducted to demonstrate the exchange dynamics of the dithiomaleimide-functionalized sugar end groups.

scholarly journals Morphology control of copper hydroxide based nanostructures in liquid phase synthesis

2021 ◽  
pp. 126225
Author(s):  
Rutuja Bhusari ◽  
Jean-Sébastien Thomann ◽  
Jérôme Guillot ◽  
Renaud Leturcq
Keyword(s):  
Liquid Phase ◽  
Morphology Control ◽  
Copper Hydroxide ◽  
Phase Synthesis

scholarly journals Multianvil High-Pressure/High-Temperature Synthesis and Characterization of multiferroic HP-Co3TeO6

2021 ◽  
Author(s):  
Gunter Heymann ◽  
Elisabeth Selb ◽  
Toni Buttlar ◽  
Oliver Janka ◽  
Martina Tribus ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Type Structure ◽  
Synthesis And Characterization ◽  
Temperature Synthesis ◽  
Space Group ◽  
Crystal System ◽  
High Temperature Synthesis ◽  
High Pressure High Temperature

By high-pressure/high-temperature multianvil synthesis a new high-pressure (HP) phase of Co3TeO6 was obtained. The compound crystallizes in the acentric trigonal crystal system of the Ni3TeO6-type structure with space group R3...

scholarly journals Fabrication and characterization of hexadecyl acrylate cross-linked phase change microspheres

e-Polymers ◽  
2020 ◽  
Vol 20 (1) ◽  
pp. 69-75
Author(s):  
Haoran Yun ◽  
Xingxiang Zhang
Keyword(s):  
Phase Change ◽  
Smooth Surface ◽  
Bone Conduction ◽  
Cross Linking ◽  
Gravimetric Analysis ◽  
Orthopedic Implant ◽  
Thermal Gravimetric ◽  
Fabrication And Characterization ◽  
Fast Release

AbstractMicrospheres with phase change properties were fabricated by polymerization of hexadecyl acrylate (HA) and different cross-linking agents. The samples were characterized by scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FTIR), thermal gravimetric analysis (TGA). The results show that, the samples that added cross-linking agents have a smooth surface and the latent heat of them is different. The experiments show that all of the cross-linked copolymer shells can be made into temperature controlled release microspheres. These materials can be potentially applied in the field of thermal energy storage. β-tricalcium phosphate was encapsulated in microspheres to obtain one with a fast release effect. It will effectively promote bone conduction when these microspheres were implanted into a bone defect. This microsphere can be used for orthopedic implant or coating of instrument in the future.

The characterization of mixed titanate Ba1−xSrxTiO3 phase formation from oxalate coprecipitated precursor

2000 ◽  
Vol 20 (3) ◽  
pp. 309-314 ◽  
Author(s):  
S. Suasmoro ◽  
S. Pratapa ◽  
D. Hartanto ◽  
D. Setyoko ◽  
U.M. Dani
Keyword(s):  
Phase Formation
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