Materials Literature
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The crystal structure of a new bismuth aluminoborate Bi0.96Al2.37(B4O10)O is studied by single-crystal X-ray diffraction. The Bi0.96Al2.37(B4O10)O single crystals are hexagonal (space group $$P\bar 6$$ 2m). The unit cell parameters are as follows: a = b = 4.587(4) Å, c = 2.253(9) Å, α = β = 90°, γ = 120°, V = 168.60 Å…
In March 2003, the marine planktonic diatoms were collected from 27 stations around Chang Islands, Trat Province in the Gulf of Thailand. Two types of the plankton net were used as filtering 100 litres of seawater through 20 ∝m mesh size and obliquely towing 70 ∝m mesh size at 2 meters above the seafloor. The diatoms…
In this paper, premature fracture of two condylar blade plates that failed inside the thigh of two separate patients is investigated. Condylar blade plates made of 316L austenitic stainless steel are widely used for internal fixation and repair of femoral fractures in orthopedic surgery. Fracture of such plates could…
An epoxy matrix varnish, used for topping treatment of electrical machines stators, was studied. The experimental nanocomposites were prepared using the same organically modified clay varying the mixing process. The nanostructure of each material was assessed by means of WAXRD. The homogeneity at the micron level was…
The proposal of this article is to present the new design technique of N (lambda/4) sections impedance transformer using geometric interpolation.The article compares the Geometric Interpolation technique with Binomial and Chebyshev Models. The increase of bandwidth and the easiness of design are factors that distingui…
The aim here is to generalise the standard FN-type equation, so that the physical equation where the local emission current density (ECD) J is related to the barrier field F becomes clearer for metals. This is a preliminary need before the above equation can be fully linked with cold field electron emission (CFE) theo…
A technique of metallorganic chemical vapor deposition (MOCVD) of copper thin films on substrates using hexafluoroacetylacetonate-copper(I)-1,5-cyclo-octadine, , as the precursor was investigated in this study. Due to the lower grain density and larger Cu grain size from complex used in the traditional Cu-MOCVD proces…
Magnesium chips less than 1 mm sizes, which are produced by the cutting of AZ91Ca2 alloy billet, are pressed at 423K and 573K to make a preform. The preforms are extruded at 623K on the extrusion ratio of 5 and 20. Microstructure of a test piece is observed by an optical microscope. Mechanical properties, fracture str…
Raman spectra of a platinum-dispersed carbon (Pt/C) electrode in H2SO4 aqueous solution were measured at room temperature under constant electrode potential. Raman bands for disordered carbon at around 1360 and 1610 cm−1 were examined in-situ with increasing time and electrode potential. A decrease in the peak intensi…
Full-electron calculations of the electronic structure of the TiSi2 compound in the structural modification C49 are performed using the augmented-plane-wave method. The total energy, the electronic band structure, and the density of states are calculated for an extended translational unit cell Ti4Si8, which is formed…
In order to obtain the information about magnetic states of reentrant ferromagnet, SmMn2Ge2, we have studied the pressure effect on magnetocaloric properties by magnetization measurements under high pressures up to 1.2 GPa in the temperature range from 5 to 300 K. Using the Maxwell relation, we estimated the magnetic…
As Thermoelectric devices are getting cheaper and more powerful in cooling, these devices are getting more popular for electronics cooling applications. However, due to the additional heat production inside the thermoelectric device, the application of a TE-cooler might not always be appropriate. In some applications,…
A simple two-dimensional mathematical model capable of describing the interactions taking place in the bulk fluid and biofilm between sulfate reducing bacteria (SRB), substrates and biocide agents was used for the numerical evaluation of biocide treatment against SRB. The characteristics inherent to thick biofilms for…
The packing efficiency of granular materials is an important consideration in a variety of industrial settings. Here, the density relaxation problem is studied using three dimensional Monte Carlo simulations, which model the effect of regular taps applied to vessel having a planar floor filled with hard spheres. Resul…
Top level requirements and challenges for optical coatings in the latest generation of 193nm lithography optics are presented. Emphasis is placed on the influence of deposition geometry effects, lens element material, and deposition process on the optical properties of such coatings.
Anodic etching characteristics of n -type silicon in aqueous hydrofluoric acid HF ∕ C 2 H 5 OH ∕ H 2 O ∕ KIO 3 ( HF ∕ KIO 3 ) and HF ∕ C 2 H 5 OH ∕ H 2 O (HF) electrolytes are investigated using photoluminescence (PL), optical microscopy, scanning electron microscopy (SEM), and atomic force microscopy (AFM). The PL in…
In this article, we present a novel high-performance multi-layer resist (MLR) process that uses a spin-on carbon (SOC) hard mask (HM). In the process, a technique involving the implantation of ions into the SOC just after coating was employed. B, P, Ar, and As were implanted in order to compare the degrees of hardenin…
A hydroxyamide-containing tetracarboxylic dianhydride was synthesized from trimellitic anhydride chloride and bis(3-amino-4-hydroxyphenyl)sulfone. Poly(amic acid)s (PAAs) were prepared from this dianhydride with several diamines in N-methyl-2-pyrrolidone (NMP). The reflux of the PAA solutions at 160°C for 3 h allowed…
The polymer stabilization (PS) is an attractive technique because the physical property of liquid crystals (LCs) can be improved and furthermore the new characteristics may occur. In this paper, we offer a new type of PS-LC in which the photocure is done at a temperature where the LC medium is in the nematic phase und…
Different molecular weights of chitosan, N-deacetylated derivative of chitin acquired from supporting material of Crustacea, were treated on postharvest grape in order to investigate their influence on disease incidence and quality during storage of fruit. Higher molecular weights of chitosan enhanced storability of g…