Materials Literature
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Shape memory alloys (SMAs) are commonly used in micro-electro-mechanical systems (MEMS). Having the unique shape memory, super-elastic affects and now damping capacity SMAs have become an important smart material for a broad range of engineering applications in last years. Copper based SMAs are promising alloys, based…
Agardite-(Y), with a refined formula of Cu(2+) 5.70(Y0.69Ca0.31)[(As0.83P0.17)O4]3(OH)6·3H2O [ideally Cu(2+) 6Y(AsO4)3(OH)6·3H2O, hexa-copper(II) yttrium tris-(arsenate) hexa-hydroxide trihydrate], belongs to the mixite mineral group which is characterized by the general formula Cu(2+) 6 A(TO4)3(OH)6·3H2O, where nine-…
The evolution of the local Jahn-Teller distortion across the LaMnO3+Δ phase diagram was obtained using the perturbed angular correlation local probe technique. We found that upon doping, the local distortion decreases continuously with increasing doping and that no fully Jahn-Teller distorted Mn(3+)O6 octahedra are ob…
Anionic complex Cs+[EuL4]− (I) is synthesized by the reaction of Eu(NO3)3 · 6H2O with 1-(1,5-dimethyl-1H-pyrazol-4-yl)-4,4,4-trifluorobutane-1,3-dione (HL) and CsOH in an aqueous-alcohol medium. Unstable adduct Cs+[EuL4]− · 2CH2Cl2 (Ia) is obtained from a solution in CH2Cl2. The structure of complex Ia is determined b…
The extensive use of plastic film has caused serious environmental pollution. In this paper, the fully degradable cotton mulching film was produced from waste cotton fiber by wet papermaking process. The breaking strength, tearing strength, degradation rate, transparency, air and moisture permeability of the cotton fi…
The aim of this work was to verify the influence of expandable graphite (EG) and aluminum hydroxide (ATH) fillers on the flammability of polyisocyanurate-polyurethane (PIR). Limited oxygen index increased to 72.5 with an incorporation of 16 phr (parts per hundred of matrix) EG and 50 phr ATH into the matrix (total wei…
[1] This study sheds light on the limitations of using [(cos θ)½] to scale sorptivity by contact angle while reaffirming its scaling by geometrical Miller scaling factor (λ½). The sorptivity for uniform and nonuniform (wavy) capillary tubes was determined by a mathematical model that includes the effect of inertia and…
ABSTRACT The monomer N‐allyliminodiacetic acid (ALD) has been synthesized and grafted onto polyamide 6.6 multifilament yarns to develop metal chelate–forming fiber using benzoyl peroxide (BPO) as an initiator. The grafting yield depends on critical parameters, such as the monomer ALD concentration, initiator BPO conce…
Polymer nanocomposites (PNC) were prepared by in-situ polymerization technique. Rod shape alumina nanoparticles of two different sizes; i) having an average diameter in the range of 10 nm and length less than 50 nm and ii) having diameter in the range of 20-40 nm and length in the range of 200-400 nm; were selected as…
A process using plentiful and inexpensive caustic calcined magnesia (CCM; main component is MgO) to prepare lamellar MH of high purity is described. The process begins with the reaction of MgO in CCM with NH 4 NO 3 at ∼100 °C to produce ammonia gas and Mg(NO 3 ) 2 solution and the subsequent filtration of Mg(NO 3 ) 2…
Lotus fiber is served as a novel kind of slender, soft and fragrant natural cellulose fiber which own perfect moisture absorption, good ventilation and culture meaning. However, current extraction approaches of lotus fiber usually exhibit low efficiency and high cost which limit its development and utilization. In thi…
The structural characteristics, energies, and spectroscopic properties of 1D linear chains and 2D planar sheets of ( meso - meso , β-β, β-β)-linked magnesium porphines have been calculated by the density functional theory B3LYP method. The trends in the changes in the ionization potential, electron affinity, relative…
At high temperatures above 1650°C, the SiC -depleted layer of ultra-high-temperature ceramics which has high porosity appears during the oxidation process. In this present paper, based on the studies of the oxidative mechanisms and the fracture mechanisms of ultra-high-temperature ceramics under normal and high temper…
A frustrated, effective ½-filled band Hubbard-Heisenberg model has been proposed for describing the strongly dimerized charge-transfer solid families κ-(ET)2X and Z[Pd(dmit)2]2. In addition to showing unconventional superconductivity, these materials also exhibit antiferromagnetism, candidate spin-liquid phases, and,…
We prepared two-dimensional Bi thin films with high-density ordered nanoscopic pores by e-beam evaporation of Bi metal. For this structure, we used polystyrene beads ranging from 200 to 750 nm in diameter as an etch mask. The typical hole and neck sizes of the Bi thin films with approximately 50 nm in thickness on SiO…
The poly (vinylidene fluoride)/poly (methyl methacrylate)(PVDF/PMMA) composite fibrous membranes with different blend ratio for use as separator of lithium-ion batteries have been developed by electrospinning technique. The surface morphology and crystal structure of electrospun PVDF/PMMA composite fibrous membranes a…
Ga2O3 thin films were grown on sapphire m-cut () and r-cut () orientations substrates at different temperatures by metal-organic chemical vapor deposition. Structural and optical properties of the Ga2O3 films were investigated including the influence by annealing for the obtained films. The Ga2O3 films on sapphire ()…
Escalating the operational actions in construction demands the development of building materials with improved properties. Today, the nanomodified and nanostructured materials (also called nanocomposites) attract great attention of the scientists all over the world. The successful development of nanocomposites require…
The high frequency dynamics of Indomethacin and Celecoxib glasses has been investigated by inelastic x-ray scattering, accessing a momentum-energy region still unexplored in amorphous pharmaceuticals. We find evidence of phonon-like acoustic dynamics, and determine the THz behavior of sound velocity and acoustic atten…
The excess Fe atoms which unavoidably exist in the Fe(Te, Se, S) crystal lattice result in a complicated antiferromagnetic ground state as well as the suppression of superconductivity. As a result, there are still discrepancies on their phase diagrams. In this paper, we report the synthesis of Fe1+δTe1-xSx (0 ≤ x ≤ 0.…