Materials and Energy Research Center (MERC)
Iranian Ceramic Society (ICERS)
Advanced Ceramics Progress
2423-7477
2423-7485
6
1
2020
03
01
An Overview of Cobalt Ferrite Core-Shell Nanoparticles for Magnetic Hyperthermia Applications
1
15
EN
B.
Shahbahrami
Department of Materials Engineering, Babol Noshirvani University of Technology, Babol, Iran
behmut@yahoo.com
S. M.
Rabiee
0000-0003-1628-7117
Department of Materials Engineering, Babol Noshirvani University of Technology, Babol, Iran
rabiee@nit.ac.ir
R.
Shidpoor
Department of Materials Engineering, Babol Noshirvani University of Technology, Babol, Iran
rezashidpoor@gmail.com
10.30501/acp.2020.105923
Cobalt ferrite nanoparticles (CoFe<sub>2</sub>O<sub>4</sub>) are well known for some distinctive characteristics such as high magnetic permeability and coercive force, good saturation magnetization, excellent physical, and chemical stability, which make them so attractive for magnetic storage, magnetic resonance imaging (MRI), drug delivery, optical-magnetic equipment, radar absorbing materials (RAM), and magnetic hyperthermia applications. According to these particularities, cobalt ferrite-based core-shell nanoparticles have been reviewed focusing on hyperthermia applications. Promoting anisotropic constant and magnetic permeability, increasing the chemical and physical stability of nanoparticles, the proper distribution of particles in aquatic environments to prevent agglomeration, sedimentation, and obstruction in a specific position, as well as enhancing biocompatibility and avoiding the disadvantages, are essential for better efficiency in hyperthermia aspect. For this purpose, the synthesis of magnetic nanoparticles of cobalt ferrite with preferentially smaller sizes, as well as a narrower range of particle size distribution, is the primary objective of the synthesis process. Hence, it is important to identify the influence of effective parameters on the size and shape of nanoparticles, the substitution mechanisms of rare-earth elements, and changing the structure and behavior of the magnetic properties by these elements and finally, the thermal properties. Moreover, surface modifications and coating are other significant parameters in hyperthermia field that are investigated to achieve a suitable and stable distribution in aqueous media, and how they behave against the magnetic field.
Hyperthermia,Cobalt ferrite,Rare-earth Elements,Surface modification
https://www.acerp.ir/article_105923.html
https://www.acerp.ir/article_105923_2920afbc322b32c14f942e64e242bacc.pdf
Materials and Energy Research Center (MERC)
Iranian Ceramic Society (ICERS)
Advanced Ceramics Progress
2423-7477
2423-7485
6
1
2020
03
01
An Investigation into the Effects of Composition and BaF2 Content on the Structure and Crystallization Behavior of SiO2-Al2O3-K2O-BaF2 Oxyfluoride Glasses
16
21
EN
L.
Farahinia
Department of Materials Engineering, Faculty of Mechanical Engineering, University of Tabriz, Tabriz, Iran
lalefarahinia@gmail.com
M.
Rezvani
0000-0002-8250-1460
Department of Materials Engineering, Faculty of Mechanical Engineering, University of Tabriz, Tabriz, Iran
m_rezvani@tabrizu.ac.ir
M.
Rezazadeh
Department of Materials Engineering, Isfahan University of Technology, Isfahan, Iran
rezazadeh.moh@gmail.com
10.30501/acp.2020.105927
Nowadays, oxyfluoride glasses have received much attention from photonic researchers as they benefit from the advantages of both oxide and fluoride glasses (low phonon energy in parallel with high mechanical and chemical durability). The purppose of this paper was to study the different glass compositions in SiO<sub>2</sub>-Al<sub>2</sub>O<sub>3</sub>-K<sub>2</sub>O-BaF<sub>2</sub> system and investigate the BaF<sub>2</sub> effects on their crystallization behavior and structure. Therefore, various chemical compositions with different amounts of BaF<sub>2</sub> (20, 30, and 40mol%) were chosen and melted in alumina crucibles at 1450˚C. The sample could not melt with the lowest percentage of BaF<sub>2</sub>. On the other hand, the glass composition containing the highest amount of BaF<sub>2</sub> was not able to show high transparency due to the phase separation that occurred in it. Finally, the sample with a 30mole ratio of BaF<sub>2</sub> was chosen as the optimized sample due to the favorable transparency. XRD patterns showed that the samples were amorphous and it somehow proved the low transparency in the presence of higher amounts of BaF<sub>2</sub> arose from phase separation than the unwanted crystallization. According to the DTA results, the crystallization peak of the fluoride phase decreased from 693˚C to 678˚C by increasing the content of BaF<sub>2</sub>. FT-IR spectra approved the oxyfluoride structure of the glasses. Higher BaF<sub>2</sub> content increased the absorption of peaks in FT-IR spectra since it results in a more discontinuous structure. Fluorine loss was higher for the glass containing the highest amount of BaF<sub>2</sub> due to the lower amount of Al<sub>2</sub>O<sub>3</sub> in its composition.
Optical Glass,Oxyfluoride,Barium Fluoride
https://www.acerp.ir/article_105927.html
https://www.acerp.ir/article_105927_b93e8afac74a5eb7e69d8096d221dcda.pdf
Materials and Energy Research Center (MERC)
Iranian Ceramic Society (ICERS)
Advanced Ceramics Progress
2423-7477
2423-7485
6
1
2020
03
01
The Impact of Current Density of Electroplating on Microstructure and Mechanical Properties of Ni-ZrO2-TiO2 Composite Coating
22
29
EN
T.
Ameri Ekhtiarabadi
Department of Metallurgy and Materials Science, Faculty of Engineering, Shahid Bahonar University of Kerman, Kerman, Iran
toobaameri@yahoo.com
M.
Zandrahimi
Department of Metallurgy and Materials Science, Faculty of Engineering, Shahid Bahonar University of Kerman, Kerman, Iran
m.zandrahimi@uk.ac.ir
H.
Ebrahimifar
Department of Materials Engineering, Faculty of Mechanical and Materials Engineering, Graduate University of Advanced Technology, Kerman, Iran
h.ebrahimifar@kgut.ac.ir
10.30501/acp.2020.105929
Metallic composite coatings with ceramic particles can be used to improve the mechanical and corrosion properties of steel. In the present research, Ni-ZrO<sub>2</sub>-TiO<sub>2</sub> composite coating was fabricated on AISI 430 stainless steel through the electrodeposition method. The effect of the current density of electroplating (15, 17, 20, and 23 mA.cm<sup>-2</sup>)was investigated on the microstructure and mechanical behavior of coated steel. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) were used to study the morphology and phases. Micro-hardness was measured by the Wickers method, and wear behavior was evaluated by the pin-on-disk test. The results showed that the deposition of TiO<sub>2</sub> and ZrO<sub>2</sub> ceramic particles in the composite coating increased and then decreased by increasing the applied current density up to 20 mA.cm<sup>-2</sup>. Similar trends were observed for the variations in hardness and wear resistance of the composite coating. According to the results, the use of Ni-ZrO<sub>2</sub>-TiO<sub>2</sub> composite coating on AISI 430 stainless steel improved the mechanical properties.
composite coating,TiO2,ZrO2,Current Density,Abrasive Resistance
https://www.acerp.ir/article_105929.html
https://www.acerp.ir/article_105929_505ea6a8c5f7bed12db412ef217ad546.pdf
Materials and Energy Research Center (MERC)
Iranian Ceramic Society (ICERS)
Advanced Ceramics Progress
2423-7477
2423-7485
6
1
2020
03
01
Crude Oil Interfacial Tension Reduction and Reservoir Wettability Alteration with Graphite or Activated Carbon/Silica Nanohybrid Pickering Emulsions
30
35
EN
M.
AfzaliTabar
Research Institute of Petroleum Industry (RIPI), P.O. Box 14665-1998, Tehran, Iran
afzalitabar@gmail.com
M.
Alaei
0000-0003-0813-4014
Research Institute of Petroleum Industry (RIPI), P.O. Box 14665-1998, Tehran, Iran
alaie1348@yahoo.com
10.30501/acp.2020.106441
In this research, two carbon structures silica nanohybrids Pickering emulsions were prepared. Graphite and activated carbon were carbon allotropes with different morphologies of laminar and spherical, respectively. The effect of carbon morphology investigated on the related silica nanohybrids Pickeringemulsions for C-EOR. Therefore, nanohybrids were prepared with graphite and activated carbon through the sol-gel method based on different weight percents and two different methods. X-Ray Diffraction (XRD), Field Emission Scanning Electron Microscopy (FE-SEM), and Thermal Gravimetric Analysis (TGA) used characterize the synthesized samples. Pickering emulsions of these nanohybrids were prepared by utilizing octane as oil model, suitable anionic surfactants and an alcoholic co-surfactant with pH=7 at room temperature using distilled water. The apparent stability of Pickering emulsion studied over a period of one month. The results of analyses indicated that graphite/silica nanohybrids Pickering emulsions had superior properties for C-EOR in comparison to activated carbon/silica nanohybrids Pickeringemulsions. It concluded that laminar morphology is more significant than the spherical morphology of carbon structure for the mentioned purpose. According to emulsion phase morphology, the optical microscopic images showed that the best samples were 70% graphite/silica (method 2) and 50% activated carbon/silica (method 2). The results of contact angle measurement represented that the 70% graphite/silica nanohybrid (method 2) is more effective on the stone reservoir improvement, which can change the wettability from oil-wet to water-wet. Nanofluid of 70% graphite/silica nanohybrid (method 2) could reduce interfacial tension.
Pickering emulsion,Nanohybrid,Graphite,Activated carbon,Silica,Chemical Enhanced Oil Recovery (C-EOR)
https://www.acerp.ir/article_106441.html
https://www.acerp.ir/article_106441_945fcc0bf06c2e22d99fc4e4694d94e0.pdf
Materials and Energy Research Center (MERC)
Iranian Ceramic Society (ICERS)
Advanced Ceramics Progress
2423-7477
2423-7485
6
1
2020
03
01
Addition of Alumina to Nanoporous Calcium Titanium Phosphate Glass-Ceramics and its Effects on Crystallization Behavior
36
42
EN
F.
Soleimani
Department of Materials Engineering, Faculty of Engineering, Malayer University, Malayer, Iran
f.soleimany@yahoo.com
M.
Rezvani
0000-0002-8250-1460
Department of Materials Engineering, Faculty of Mechanical Engineering, University of Tabriz, Tabriz, Iran
m_rezvani@tabrizu.ac.ir
10.30501/acp.2020.106443
Microporous Calcium Titanium Phosphate glass-ceramics have many uses in high-tech industries. For example, they have applications in catalysts industry. In this study, different molar percentages of alumina were added to a glass with P<sub>2</sub>O<sub>5</sub> 30, CaO 45, TiO<sub>2</sub> 25 (mol%) composition. The samples were melted at 1350°C and crystallization heat treatment was performed on the glasses after cooling to make glass-ceramics. The Differential Thermal Analysis (DTA) was used to determine nucleation and crystallization temperature. The DTA curve of the sample had 4 molar% and alumina had the sharpest crystallization peak. The CP and CTP phases were the most crystalline phases in all samples. The soluble CP phase disappeared and the porous structure of the CPT crystals remained through the acid washing of the samples. The results showed that the addition of alumina decreased the crystallization temperature, time and temperature of crystallization, and also increased the average size of porosities (from 12 to 16 nm).
Phosphate Glass-ceramics,Nanoporous,Crystallization,Alumina
https://www.acerp.ir/article_106443.html
https://www.acerp.ir/article_106443_a73ab60f9d08d6f84c5b1cdb22819d39.pdf
Materials and Energy Research Center (MERC)
Iranian Ceramic Society (ICERS)
Advanced Ceramics Progress
2423-7477
2423-7485
6
1
2020
03
01
Crystal Structure and Lattice Parameter Investigation of La3+ Substituted CeO2 in LaxCe1-xO2-X/2 Synthesized by Solid-State Method
43
48
EN
A. M.
Fathi Dehkharghani
Ceramics Department, Materials and Energy Research Center, Meshkin Dasht, Alborz, Iran
fathi.amir66@gmail.com
M. R.
Rahimipour
0000-0001-5840-0339
Ceramics Department, Materials and Energy Research Center, Meshkin Dasht, Alborz, Iran
m-rahimi@merc.ac.ir
M.
Zakeri
0000-0001-5551-4912
Ceramics Department, Materials and Energy Research Center, Meshkin Dasht, Alborz, Iran
m_zakeri@merc.ac.ir
10.30501/acp.2020.106445
Lanthanum (La) doped Ceria (CeO<sub>2</sub>) has attracted considerable interest as a candidate material for thermal barrier coating (TBC) because of its low thermal conductivity and potential capability to be operated above 1250<sup>°</sup>C. In this study, La<sub>2</sub>Ce<sub>2</sub>O<sub>7</sub> powder was synthesized through the ball mill method. The crystal structure of La<sup>3+</sup> substituted CeO<sub>2</sub> solid solution was investigated by X-ray diffraction in La<sub>x</sub>Ce<sub>1-x</sub>O<sub>2-x/2</sub> (0<x< 0.5). The fluorite structure of CeO<sub>2</sub> did not change although La<sup>3+</sup> was the largest trivalent rare-earth ion. The lattice parameter changed from 5.41 to 5.59Å by increasing La content. Changes in the lattice parameters of La<sub>x</sub>Ce<sub>1-x</sub>O<sub>2-x/2</sub> that were compared with the theoretical values measured by XRD were obtained based on the oxygen vacancy model. The theoretical lattice parameters were larger than the lattice parameters calculated from the X-ray diffraction pattern. Moreover, the Williamson–Hall equation was used to measure the crystallite size and strain in the La<sub>x</sub>Ce<sub>1-x</sub>O<sub>2-x/2</sub> lattice as a function of the lanthanum content. The results showed that the presence of lanthanum in the structure reduced the crystallite size.
La2Ce2O7,Solid state,Synthesize,crystal structure,lattice parameters
https://www.acerp.ir/article_106445.html
https://www.acerp.ir/article_106445_4961bb8d3553f11018ba395f2191de5d.pdf