Materials and Energy Research Center (MERC)
Iranian Ceramic Society (ICERS)
Advanced Ceramics Progress
2423-7477
2423-7485
4
2
2018
05
01
An investigation on Mechanical Properties of Apatite-Wollastonite-Diopside Glass-Ceramics Composites
1
6
EN
A.
Faeghinia
0000-0001-6288-7178
Ceramic Division, Materials and Energy Research Center, P. O. Box: 14155-4777, Tehran, Iran
aida.faeghinia@gmail.com
E.
Salahi
Ceramic Division, Materials and Energy Research Center, P. O. Box: 14155-4777, Tehran, Iran
e-salahi@merc.ac.ir
10.30501/acp.2018.91119
In the present study, Apatite-Wollastonite-Diopside glass-ceramic composites were prepared by the pressureless sintering process at the temperature range of 1100-1160 °C. The weight percentage of phlogopite was varied between 10% and 50%. In addition, the bending strengths were increased from 100 to 170 Mpa by increasing the content of phlogopite up to 20 wt%. Furthermore, the sintering conditions were studied via characterizing the linear shrinkages and the relative densities of sintered samples. The relative density of composites increased through increasing the content of phlogopite up to 83% at 1050 °C in C55 sample (with 50:50 weight percent). The XRD results showed that the forsterite as well as the phlogopite phase caused the maximum hardness of 16 GPa in C28 sample .
Pressureless sintering,Mechanical properties,Relative Density,Hardness,Ceramic Composite
https://www.acerp.ir/article_91119.html
https://www.acerp.ir/article_91119_268b33ded0f10a62147faa7804da3e7b.pdf
Materials and Energy Research Center (MERC)
Iranian Ceramic Society (ICERS)
Advanced Ceramics Progress
2423-7477
2423-7485
4
2
2018
05
01
Studying the Effects of Nano Sintering Additives on Microstructure and Electrical Properties of Potassium-Sodium Niobate Piezoceramics
7
15
EN
R.
Hayati
0000-0001-6843-0718
Department of Materials Science and Engineering, Faculty of Engineering, Yasouj University, Yasouj, Iran
r.hayati@yu.ac.ir
Reza.
Bazargan-Lari
Department of Materials Science and Engineering, Marvdasht Branch, Islamic Azad University, Marvdasht, Iran
rbazargan@shirazu.ac.ir
M. A.
Askari Zamani
Department of Materials Science and Engineering, Faculty of Engineering, Yasouj University, Yasouj, Iran
askari37@yahoo.com
Z.
Balak
Department of Materials Science and Engineering, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran.
zbalak1983@gmail.com
10.30501/acp.2018.91120
In this paper, lead free (K<sub>0.48</sub>,Na<sub>0.52</sub>)NbO<sub>3</sub> (KNN(48-52)) piezoelectric ceramics were made by the conventional solid- state sintering process. In order to decrease the sintering temperature and modify the dielectric, piezoelectric and ferroelectric properties, sintering additives of nano ZnO (n-ZnO), nano CuO (n-CuO) and nano SnO<sub>2</sub> (n-SnO<sub>2</sub>) were used. Phase structure and microstructure were analyzed by using X-ray diffractometry and scanning electron microscopy techniques, and the EDX analysis was used to study the ZnO distribution at grains and grain boundaries. The highest piezoelectric constant of d<sub>33</sub>= 150 pC/N was obtained for KNN(48-52) with 0.6 mol% n-ZnO at a sintering temperature of 1070°C, which is two times larger than the pure KNN(48-52) at the sintering temperature of 1112 °C. Additionally, the KNN(48-52) ceramics co-doped with 0.8 mol% n-ZnO, 0.5 mol% n-CuO and 0.8 mol% n-SnO<sub>2</sub>, showed dielectric and piezoelectric properties of d<sub>33</sub>= 97 pC/N, tanδ = 0.006 and ε<sub>r</sub> = 172 at the sintering temperature of 960 ºC, which were much better than corresponding values for pure KNN at 1110 ºC.
(K0.48Na0.52) NbO3,Nano Sintering Additives,Piezoelectric Properties,Dielectric properties
https://www.acerp.ir/article_91120.html
https://www.acerp.ir/article_91120_a9a6682ebc608d4436be58daf9847f25.pdf
Materials and Energy Research Center (MERC)
Iranian Ceramic Society (ICERS)
Advanced Ceramics Progress
2423-7477
2423-7485
4
2
2018
05
01
An investigation on injectable composites fabricated by 45S5 bioactive glass and gum tragacanth: Rheological properties and in vitro behavior
16
26
EN
Mahtab
Rasti
Department of Nanotechnology & Advanced Materials, Materials and Energy Research Center, Karaj, Iran
m.rasty167@gmail.com
Saeed
Hesaraki
0000-0001-9147-5850
Department of Nanotechnology & Advanced Materials, Materials and Energy Research Center, Karaj, Iran
s-hesaraki@merc.ac.ir
Nader
Nezafati
0000-0002-2072-5012
Department of Nanotechnology & Advanced Materials, Materials and Energy Research Center, Karaj, Iran
n.nezafati@merc.ac.ir
10.30501/acp.2018.91121
The injectable composites were formulated from melt-derived 45S5 bioactive glass powder and gum tragacanth. The effect of the tragacanth (2 and 4 w/v%) and powder to liquid ratio (P/L= 1.5 to 2.5) on rheological properties, injectability, degradation, swelling, and bioactivity the composites were studied. With increasing the P/L ratio and tragacanth concentration, the force required for injection of the composites is increased. However, the formulated composites show maximum injection force of 15 N, which seems to be appropriate for surgical purposes. The formulated composites indicate positive thixotropic behavior, whereas increasing tragacanth from 2% to 4% lead to deteriorating its behavior. Moreover, thecomposites formulated by 2% tragacanth show much more resistance against degradation and swelling. The bioactivity analyze confirms the formation of flake-like apatite nanostructures on the surface of nanocomposites in initial days of immersion into the SBF solution.
Injectable composite,Tragacanth,45S5 bioactive glass,Rheological properties,Degradability, Swelling
https://www.acerp.ir/article_91121.html
https://www.acerp.ir/article_91121_2385887cde2e20ab15c31e3c7f799891.pdf
Materials and Energy Research Center (MERC)
Iranian Ceramic Society (ICERS)
Advanced Ceramics Progress
2423-7477
2423-7485
4
2
2018
05
01
Binder-free copper hexacyanoferrate electrode prepared by pulse galvanostatic electrochemical deposition for aqueous-based Al-ion batteries
27
31
EN
Pourya
Parvizi
Department of Materials Engineering, Faculty of Engineering, Malayer University, P.O. Box 65719-95863, Malayer, Iran
poryamr@gmail.com
Mahdi
Kazazi
Department of Materials Engineering, Faculty of Engineering, Malayer University, P.O. Box 65719-95863, Malayer, Iran
m_kazazi@malayeru.ac.ir
10.30501/acp.2018.91122
Copper hexacyanoferrate (CuHCF) nanoparticles with tunnel-like Prussian blue structure were deposited on a graphite substrate via pulse galvanostatic electrodeposition at 25 mA cm<sup>-2</sup> with two 0.1 speriods of on/off-time. The prepared electrodereversibly showedthe intercalation/de-intercalation ability of Al ions in aqueous solution. The crystal structure of the as-prepared CuHCF film was characterized by X-ray diffraction (XRD) analysis. The surface morphology of the film was examined by a field-emission scanning electron microscope (FESEM). Moreover, the electrochemical energy storage performance of the prepared binder-free electrode was inspected by cyclic voltammetry (CV) and galvanostatic chargedischarge (GCD) measurements at various rates in aqueous-based aluminum sulfate electrolyte. The CuHCF was verified that canbe a promising cathode material for the aqueous Al-ion batteries. The prepared CuHCF electrode exhibited a high specific capacity of 77.7 mAh g<sup>-1</sup> and a good rate capability with 67.1% capacitance retention rate at a current density of 50 mA g-1and 400 mA g<sup>-1</sup>, respectively. Furthermore, after 400 cycles at 400 mA g<sup>-1</sup>, the electrode showed a good cycle performance with a capacity retention rate of 74.4%.<br /> <span> </span>
Electrochemical deposition,Copper hexacyanoferrate,Al-ion batteries,Aqueous electrolyte,cathode
https://www.acerp.ir/article_91122.html
https://www.acerp.ir/article_91122_57ae35225b11146db2e957a834205c69.pdf
Materials and Energy Research Center (MERC)
Iranian Ceramic Society (ICERS)
Advanced Ceramics Progress
2423-7477
2423-7485
4
2
2018
05
01
Cathodic Electrodeposition and Characterization of YAG Nanostructure: Effect Current Density on the Morphology
32
36
EN
M.
Hosseinifard
Department of Semiconductors, Materials and Energy Research Center, P .O. Box 14155-4777 Tehran, Iran
m.hosseini@merc.ac.ir
K.
Ahmadi
Department of Semiconductors, Materials and Energy Research Center, P .O. Box 14155-4777 Tehran, Iran
ahmadi@merc.ac.ir
A.
Badiei
School of Chemistry, College of Science, University of Tehran, Tehran, Iran
abadiei@khayam.ut.ac.ir
10.30501/acp.2018.91123
YAG (Yttrium Aluminum Garnet) was successfully prepared through cathodic electrodeposition process by applying different current densities to the mixture of YCl<sub>3</sub> and AlCl<sub>3</sub> solution (water/ethanol 1:1 volume ratio). Hydroxide precursors were cathodically grown on the cathode surface (at different current densities) and then the obtained hydroxide powder was heat-treated at 1100 °C for 2 h. The oxide products were characterized by XRD, FTIR, DSC-TGA, SEM and EDAX techniques. The effect of applied current density on the morphology and particle size of YAG nanostructures were investigated through SEM images. Experimental results showed that the cathodic electrodeposition followed by heat-treatment can be used as a facile method for preparation of YAG nanostructures with different morphologies.
Yttrium aluminum garnet,Nanostructure,Cathodic electrodeposition,Hydroxide
https://www.acerp.ir/article_91123.html
https://www.acerp.ir/article_91123_2ce893fc3210c897c94c39bec8102470.pdf
Materials and Energy Research Center (MERC)
Iranian Ceramic Society (ICERS)
Advanced Ceramics Progress
2423-7477
2423-7485
4
2
2018
05
01
Investigating the Effect of Ultrasonification Time on Transition from Monolithic Porous Network to Size-Tunable Monodispersed Silica Nanosphere in Stöber Method
37
43
EN
M.
Nangir
Semiconductors department, Materials and Energy Research Center, P.O. Box 14155/4777, Tehran, Iran
mahyanangir@gmail.com
A.
Massoudi
0000-0002-4203-7376
Semiconductors department, Materials and Energy Research Center, P.O. Box 14155/4777, Tehran, Iran
masoudi@merc.ac.ir
S. A.
Tayebifard
0000-0003-3117-177X
Semiconductors department, Materials and Energy Research Center, P.O. Box 14155/4777, Tehran, Iran
a-tayebi@merc.ac.ir
10.30501/acp.2018.91124
Uniform colloidal monodispersion of silica nanospheres were synthesized via Stöber method using ammonia as a basic catalyst. The effect of TEOS, EtOH, and H<sub>2</sub>O concentrations on the particle size and morphology were investigated. On the results, increasing in ultrasonication time as a new parameter from 12 to 45 min led to transition from monolithic porous network to homogenous nanospheres due to possessing enough time for micelle growth. Decreasing in TEOS concentration from 0.067 to 0.012 mol L<sup>-1</sup> and increasing in H<sub>2</sub>O concentration from 3 to 14 mol L<sup>-1</sup> at NH<sub>4</sub>OH concentration of 14 mol L<sup>-1</sup> accelerated the rate of hydrolysis and condensation of [Si (OC<sub>2</sub>H<sub>5</sub>)4-X(OH)X]. Also, EtOH solvent prevented micelle aggregation and formed the spheres with the smallest variance in the size distribution.
Stöber method,Ultrasound,Porous Network,Ammonia,Silica,Nanosphere
https://www.acerp.ir/article_91124.html
https://www.acerp.ir/article_91124_bb594ad862ad1e0baaa1dbed5ecf2d98.pdf