Materials Literature
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A new method to make SMA is developed by using SBS modified asphalt when the coarse aggregate steel slag and the fine basalt aggregate are selected respectively. The Mix Proportion is 1#(16-9.5mm, steel slag):2#(9.5-4.75mm, steel slag):3#(3-4.75mm, basalt):4#(3-0mm, basalt):5# (mineral powder)=38%:36%:8%:8%:10%.The op…
Knitted fabrics are preferred as clothing materials because of of their outstanding comfort quality. 16 plain knitted fabric samples were produced from 4 combed ring spun yarn of linear densities 29.5 Tex, 23.6, Tex 19.7 Tex and 17.4 Tex and 4 different stitch lengths from each yarn linear density were selected for th…
This paper describes the preparation of a piezoelectric glass ceramic material from potassium sodium niobate (K 0.5 Na 0.5 NbO 3 ; KNN) using a novel melting method. The effects of the subsequent heat-treatment on the optical, thermal, electrical, and mechanical properties of the material are carefully examined, and i…
In this paper the effect of different types of coatings on durability increase of the tool for surface plastic deformation is considered. Wide burnishing processing with coated tool was selected as such research was performed for the first time. The influence of the type of coating on the tool durability has been expl…
Grafting polymerization was a valuable method for the modification of the chemical and physical properties of polymer surfaces. In this paper, the grafting of cationic vinyl monomer with quaternary ammonium groups, methacryloxyethyltrimethyl ammonium chloride (DMC), onto the isotactic polypropylene (iPP) granule was p…
The aim of the research was to investigate the influence of strontium on the structure thin films La1-x SrxCoO3 (x=0; 0.1, 0.2). The LaCoO3 and LaCoO3 doped by Sr films were grown by pulsed laser deposition (PLD) on Si [100] substrate using an Excimer KrF (= 248 nm). To characterize the structure and morphology of th…
Multiwall carbon nanotubes/epoxy and graphite nanoplatelets/epoxy composite materials (2-5 wt %) as well as the composite materials with barium hexaferrite as secondary filler (27 wt %) were prepared. Alignment of barium hexaferrite nanoparticles was performed by magnetic field action during polymerization process. Mo…
Strontium copper hexaferrite powder with composition Sr2Cu2Fe12O22 was synthesized in presence of a non-ionic surfactant Tween-80 using chemical co-precipitation route. The prepared samples were calcinated at 950 oC for 4 hrs in a furnace and then slowly cooled to room temperature to obtain Sr2Cu2Fe12O22 hexaferrite p…
Phase-pure KNN (K0.5Na0.5NbO3) was synthesized from Rochelle salt and niobium pentoxide through solid-state route and the synthesized powder was sintered at 1130°C to get dense KNN ceramics. After polarization fatigue test, it was found that the d33, kP and remanent polarization (Prem) of KNN decreased substantially.…
The static scale-inhibiting method was employed to investigate the scale inhibition performance of polyepoxysucci-nic acid (PESA) on calcium phosphate, and molecular dynamics (MD) method was used to simulate the interactions between PESA and (001), (010) surfaces of hydroxyapatite (HAP, the most thermodynamically stab…
Jolana Kološová, Tomáš Hrnčíř, Jaroslav Jiruše, Miroslav Rudolf, Jakub Zlámal; On the Calculation of SEM and FIB Beam Profiles, Microscopy and Microanalysi
Plásticos como o polipropileno (PP) e o poli (tereftalato de etileno) (PET) são produzidos a partir do petróleo que não são fontes renováveis e levam muitos anos para desaparecerem do ambiente onde são depositados, após sua utilização. Fungos do gênero Pleurotus,por possuírem um complexo enzimático único, que os habil…
The main statements of the theory of vibrations of piezoelectric elements (PEEs) in the form of thin bounded plates of different shapes are considered and a technique for calculating their resonance frequencies (vibration modes) is developed. A technique for calculating and constructing the elastic fields of vibrating…
An ultrathin electromagnetic lens based on Huygens' metasurface is proposed for 28-GHz band applications. The lenses consist of a series of subwavelength (about 0.5λ0 × 0.5λ0, is the operating wavelength in free space) and non-resonant metal structures etched on a single-layer dielectric substrate. Each element can re…
The methods of segmentation and statistical processing of the data on the relief formation on the self-organized surface of the statically deformed alloy D16chT are used. This allowed determining the signal parameters, segment structure and morphological peculiarities of self-organization as the data of the cyclic ran…
Abstract Eckerite, ideally Ag2CuAsS3, is a new mineral from the Lengenbach quarry in the Binn Valley, Valais, Switzerland. It occurs as very rare euhedral crystals up to 300 μm across associated with realgar, sinnerite, hatchite, trechmannite and yellow, fibrous smithite. In thick section eckerite is opaque with a met…
The article describes the model of the interaction of cavitation zone formed under the action of ultrasonic vibrations and interphase boundary of gas and liquid media, which spreads on solid surface in the form of liquid layer. It is shown that this interaction leads to the generation of capillary waves and consequent…
Si is well-known semiconductor that has a fundamental bandgap energy of 1.12 eV. Its photogenerated electrons in the conduction band can react with the ubiquitous oxygen molecules to yield ⋅O2− radicals, but the photogenerated holes in the valance band can’t interact with OH− to produce ⋅OH radicals. In this paper, we…
The ab initio computer design of the CdS-based quantum dots and the cobalt doped CdS quantum dots is carried out. The characteristics features of the atomic and electronic structures of semiconductor colloidal quantum dots on CdS of different sizes are studied, and the effect of cobalt impurity atoms is estimated. We…
The electrochemical corrosion behavior of mild steel in 0.5M H2SO4 solution in the presence of apple, Malus domestica (MD); bonduc, Caesalpinia bonducella (CB) leaf extracts were investigated using potentiodynamic polarization curves measurements, electrochemical impedance spectroscopy techniques and Fourier infrared…