Walter de Gruyter GmbH

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Synthesis and phosphorescent properties of the copolymers of N-vinylcarbazole, methyl methacrylate and iridium complex
Walter de Gruyter GmbH - Tập 32 - Trang 206-213 - 2014
Wen Wang, Minglu Zhou, Luying Liang, Meijuan Lin, Qidan Ling
The copolymers containing carbazole unit and iridium complexes, such as (Ir(bpy)2Cl, Ir(mbpy)2Cl and Ir(Brbpy)2Cl, were synthesized via radical copolymerization of N-vinylcarbazole, methyl methacrylate and iridium complex. The synthesized copolymers were characterized by FT-IR, UV-Vis absorption spectroscopy and photoluminescence (PL) spectroscopy, respectively. According to the results, the copol...... hiện toàn bộ
Magnetic and electric behavior of NiFe2O4-PVDF nanocomposites
Walter de Gruyter GmbH - Tập 30 - Trang 419-425 - 2012
S. Sen, A. K. Panda, K. Prasad
NiFe2O4-PVDF composites in different ratios (10 %, 30 % and 50 %) were prepared in two steps. Firstly, fine nanosized NiFe2O4 powder was synthesized using the precursor solution method. Then the composites were made by hot-press technique. The presence of both the phases (ceramic and polymer) was confirmed by XRD micrographs. The average particle size of the composites varied from 18–23 nm. SEM mi...... hiện toàn bộ
Metamaterials based on polymer dispersions of nanoparticles and particles of copper obtained by cathodic current pulse electrolysis
Walter de Gruyter GmbH - - 2011
P. Łoś, Aneta Łukomska, Sylwia Kowalska, Regina Jeziórska, Przemysław Zaprzalski, Jerzy Krupka
Synthesis and in vitro investigation of sol-gel derived bioglass-58S nanopowders
Walter de Gruyter GmbH - Tập 30 - Trang 45-52 - 2012
S. Joughehdoust, S. Manafi
The aim of this research is the synthesis of bioglass-58S nanopowders by sol-gel method. Also, the effect of aging time of parent sols on the morphology, structure and particle size was investigated. Bioglass-58S powders were analyzed by X-ray diffraction patterns (XRD), Fourier transform infrared spectroscopy (FTIR), zetasizer instrument, scanning electron microscopy (SEM) and transmission electr...... hiện toàn bộ
The influence of densification temperature and the size of powder particles on the properties of isotropic Nd-Fe-B magnets made of quenched ribbons
Walter de Gruyter GmbH - Tập 30 - Trang 297-302 - 2012
W. Lipiec, W. Wilczyński, B. Szubzda
The influence of densification temperature and the size of powder particles on magnetization of remanence J r , coercivity J H c of hot-densified Nd-Fe-B magnets made of MQP-A quenched ribbons was investigated. A connection between magnetic prop...... hiện toàn bộ
Chemical modification of TiO2 by H2PO 4 − /HPO 4 2− anions using the sol-gel route with controlled precipitation and hydrolysis: enhancing thermal stability
Walter de Gruyter GmbH - - 2014
Kais Elghniji, Mohamed El Khames Saad, Manel Araissi, Elimame Elaloui, Younes Moussaoui
Two titanium phosphate materials (T p P and T h P) have been successfully synthesized by sol-gel route with controlled precipitation and hydrolysis. The T p P material was obtained from the reaction between precipitated titania and phosphate buffer solution H2PO 4 ...... hiện toàn bộ
Synthesis and characterization of jar-like ZnO structures
Walter de Gruyter GmbH - Tập 29 - Trang 158-164 - 2011
C. Li, Q. Meng, R. A. Reddy, C. Xu
A new jar-like ZnO structure was synthesized by heating a mixture of Zn and InI3 powder with a weight ratio of 4:1 dispersed on Si wafer at 450°C in air. The diameter of the jar was of the order of 15 μm and the length of 20 μm. The formation of a molten InI3 drop, coating the drop with Zn powders, oxidation of these Zn grains, decomposition of InI3 to In and I vapors and the subsequent release of...... hiện toàn bộ
Synthesis and characterization of Ni-Si mixed oxide nanocomposite as a catalyst for carbon nanotubes formation
Walter de Gruyter GmbH - Tập 29 - Trang 152-157 - 2011
M. A. Pasha, Z. Fakhroueian, A. Shafiekhani, M. A. Vesaghi, F. Farzaneh
Ni-Si mixed oxide nanocomposite was prepared by co-precipitation method with Ni(NO3)2 · 6H2O and tetraethylorthosilicate (TEOS) at pH = 10.5 under reflux condition for 6 days. It was then used as a catalyst for the formation of carbon nanotubes (CNTs) by CVD procedure. Characterization of the catalyst and the CNTs was carried out using X-ray diffractometry (XRD), scanning electron microscopy (SEM)...... hiện toàn bộ
The effects of sintering temperature and poling condition on the piezoelectric properties of 0.935(Bi0.5Na0.5)TiO3 - 0.065BaTiO3 ceramics
Walter de Gruyter GmbH - Tập 29 - Trang 9-14 - 2011
H. Lidjici, M. Rguiti, F. Hobar, J. -F. Trelcat, C. Courtois, A. Leriche
The 0.935(Bi0.5Na0.5) TiO3 -0.065BaTiO3 (abbreviated as BNT6.5BT) lead-free ceramics were prepared by conventional solid state sintering technique. The effects of sintering temperature (1150–1200 °C) and poling condition on its piezoelectric properties were examined. Piezoelectric properties like the piezoelectric constant (d33) and electromechanical factors (k p ...... hiện toàn bộ
Study of magnetic inhomogeneity in β-Cu3Fe4V6O24
Walter de Gruyter GmbH - Tập 30 - Trang 1-9 - 2012
N. Guskos, G. Zolnierkiewicz, J. Typek, R. Szymczak, A. Blonska-Tabero
The temperature dependence of dc magnetization and electron paramagnetic resonance (EPR) spectra of the β-Cu3Fe4V6O24 multicomponent vanadate were investigated. Dc magnetic measurements showed the presence of strong antiferromagnetic interactions (Curie-Weiss temperature, Θ ∼ 80 K) at high temperatures, while zero-field-cooled (ZFC) magnetization revealed a cusp-like maximum in low fields at T ...... hiện toàn bộ
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