Materials Literature
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Atomically flat, epitaxial, and stoichiometric thin films of the\nelectronically phase separated compound\n(La$_{0.5}$Pr$_{0.5}$)$_{0.67}$Ca$_{0.33}$MnO$_{3}$ were grown on as-received\nand treated NdGaO$_{3}$ substrates by fine tuning of oxygen pressure during\ndeposition. Optimal thin films with step flow growth mod…
We investigated the electric charge injection properties of a floating-gate type metal-insulator Si capacitor having different-ME gate insulators. The samples showed charge-injection type behaviour in capacitance-voltage curves, and it was revealed that the amount of injected charges can be controlled by the applicati…
Due to an environmental concern, a lead-free ferroelectric with properties comparable to those of lead zirconate titanate is required. Based on the tolerance factor, the single perovskite phase of Bi 1/2 K 1/2 (X 1/3 Nb 2/3 )O 3 (X = Cu BKCuN, X = Mg BKMgN or X = Zn BKZnN). The X-ray diffraction (XRD) patterns showed…
The Barium titanate (BaTiO 3 , BT) [110] grain-oriented ceramics along [110] direction were prepared by a templated grain growth (TGG) method. The [110] oriented BT platelike particles ( t -BT) were used as template particles. The relationship between poling treatment program and piezoelectric constant was investigate…
Relationship between the grain size of ZnO and the amounts of Bi and Sb for Bi-Ba-Sb-Co-Mn-added ZnO was investigated. The amount of Bi at which the grain size of ZnO became the maximum shifted to the notably larger one by adding small amount of Sb such as 0.01 mol%. The maximum value of the grain size when adding Sb…
Stress development during cofiring a bi-layer ferrite/dielectric laminate has been investigated by measuring camber development and shrinkage rate difference. The trend of camber development follows a similar pattern to the linear shrinkage rate difference between ferrite and dielectric ceramics. No cofiring defects a…
Ba 0.6 Sr 0.4 TiO 3 doped with MgO, CaO, SrO, or BaO thick films with Ni electrodes were prepared by screen printing. The prepared thick films showed a perovskite single phase. T C was changed corresponding to the kinds of doping oxides. The tunability and tan δ value of thick films doping with 2 mol% of BaO or CaO at…
This present study aims to fabricate and characterize a series of new complex-structured ceramics with formula (1- x )Pb(Zr 0.52 Ti 0.48 )O 3 − x Bi 3.99 Ti 2.97 Nb 0.03 O 12 or (1- x )PZT − x BNbT (when x = 0, 0.1, 0.3, 0.5, 0.7, 0.9 and 1.0) using a solid-state mixed oxide method and sintered at temperatures in betw…
The densification behaviour of Gadolinium-doped ceria (GDC) upon sintering is investigated from macroscopic and microscopic points of view. The time-resolved length-change measurement with high-resolution dilatometry and positron lifetime spectroscopy are conducted. Positron lifetime spectroscopy reveals the presence…
In the present study the tool of impedance spectroscopy was utilized to characterize dielectric behavior of ferroelectromagnetic ceramics of Bi 9 Fe 5 Ti 3 O 27 composition fabricated by hot pressing method from the stoichiometric mixture of oxides Bi 2 O 3 , TiO 2 and Fe 2 O 3 . Impedance spectroscopy was applied to…
Nanocubes accumulations were built up by meniscus method and developed to achieve a dense structure. For the first attempt, strontium titanate (SrTiO 3 , ST) nanocubes were selected for the nanocubes accumulations. The ST nanocubes were prepared by a solvothermal method via a titanium tetraisoproxide route for the nar…
We have investigated Fe electrode/SrFeO 3-x stacking layer as resistance random access memory which is called next generation non-volatile memory. In this stacking system, positive magnetoresistance (MR) due to exchange coupling between Fe electrode and SrFeO 3-x layer was observed in initial state. After applying ext…
In this study, a new electric power measurement system for energy harvesting using unimorph-type piezoceramics was developed. It shows Fig. 1(a). Relationships between electric power and material constants such as d 33 , d 31 , g 31 , k 31 , ε 33 T /ε 0 , s 11 E , Qe and Qm were investigated using various Lead zirconi…
The effect of the mechanical milling treatment for calcined powders on the density of sintered materials was examined to prepare KSr 2 Nb 5 O 15 (KSN) dense ceramics under the pressureless condition. The milling treatment process is effective for preparation of dense KSN ceramics. The KSN ceramics having relative dens…
Heavy ion beam irradiation is usually chosen to simulate neutron irradiation damages in materials. However, there has the difficulty to study macro-properties of irradiated materials due to the very small affected depth. In this study, we have explored macro-properties of the ion-irradiated materials, owing to very fi…
In the title complex, [Cu(NO(3))(2)(C(11)H(11)N(3)O)(4)], the Cu(II) atom is situated on a centre of inversion and is coordinated by two O atoms from two nitrate anions and four N atoms from four monodentate 1-phenyl-3-(1H-1,2,4-triazol-1-yl)propan-1-one ligands in a distorted octa-hedral geometry. Weak inter-molecula…
The history of protecting the hulls of Britain’s wooden warships with copper sheathing and, later, replacing iron bolts with copper to avoid disastrous galvanic corrosion is well documented. Less well known are the nature and properties of the copper used and the details of its processing. This poster will present the…
In the title complex, [RuCl(2)(C(8)H(12))(C(3)H(5)N)(2)], the metal ion is coordinated to both double bonds of the cyclo-octa-1,5-diene ligand, two chloride ions (in cis positions) and two N-atom donors from two propane-nitrile mol-ecules that complete the coordination sphere for the neutral complex. The coordination…
The microwave dielectric resonance properties of Na 1/2 Bi 1/2 Cu 2.82 Mn 0.18 Ti 4 O 12 (NBCMTO) ceramics are reported. Single-phase NBCMTO powder were obtained from the mixed oxide route at 975°C and dense ceramics (∼ 97% of the theoretical X-ray density) with a grain size distribution between ∼ 2 and 10 μm by sinte…
Multiferroics which are simultaneously ferroelectric and magnetically ordered are of great importance both for fundamental solid state physics and for modern technology. The polycrystalline sample of 0.1Bi 0.95 Dy 0.05 FeO 3 – 0.9Pb(Fe 2/3 W 1/3 )O 3 were synthesized using standard sintering procedure. Crystal phase p…