Advanced Materials Research Vols. 989-994

Abstract: Here, a simple method was presented for fabricating superhydrophobic silicon surfaces. Square-pillar-array samples were fabricated on silicon substrates by using the femtosecond laser micromachining technology. We measured the static and dynamic contact angles for water on these surfaces. The contact angles and the rolling angles on the silicon surfaces were measured through an optical contact angle meter. Wettability studies revealed the films exhibited a superhydrophobic behaviour with a higher contact angle and lower rolling angle-a water droplet moved easily on the surface.

Abstract: The research uses electric arc spraying with low cost and convenient operation to prepare four TiB₂ particle reinforced composite coatings with high bonding strength and uniform tissue. It makes comparative study on elevated temperature erosion actions of coating and 45CT of electric arc spraying. The results indicate the coating has excellent erosion wearing resistance. TiB₂ particles in M-TiB₂ coating have small size, have good unity with metallic matrix, and are distributed on metallic matrix with high hardness relatively uniformly, and porosity of coating is low. The coating has excellent erosion resistance.

Abstract: Material is the carrier of all industrial design, which is inseparable with. Material is the material basis for human survival and development and new materials is a foundation for future world. With the development of science and technology and rapidly changing times, people have developed more new material on the basis of traditional materials. Based on gray theory of new materials evaluation system, the paper made an analysis and research on a representative of the new materials.

Abstract: SrCO₃ were synthesized using Sr (OH)₂ solution and CO2 in super gravity reactor of carbide. It studied SrCO₃ powder morphology by the dosage of the appearance agent Ethylene Diamine Tetraacetic Acid (EDTA), material flow and flow velocity and the speed of the rotating packed bed. Samples were characterized using X-ray powder diffraction (XRD) and scanning electron microscope (SEM). These products were found to be orthorhombic SrCO3 nanoparticles with 90–110 nm ranges.

Abstract: A novel electron donor unit based on phenothiazine has been designed and constructed. The target compound 10-octyl-3,7-di (thiophen-2-yl)-10H-phenothiazine was easily synthesized in high yields with a milder and efficient route via the Suzuki coupling reaction. Optical spectra show that, from the solution to the solid state, both the absorption and fluorescence spectra of the target compound are small blue-shifted. Moreover, the fluorescence spectra exhibit the emission maxima of the target compound ranging from 485 nm to 496 nm, which belongs to blue-green light region. As expected, the target compound should be a promising donor to construct D-A type materials for applications in organic light-emitting diodes (OLEDs).

Abstract: The background and design idea of the intelligent materials is introduced. Three elements of intelligent materials are given. Then based on classifying of intelligent materials, the features and applications of intelligent materials are researched.Principle and the latest applications of typical intelligent materials such as optical fiber, shape memory alloys, shape memory polymers, piezoelectric, magnetostrictive materials, fluid material and polymer colloid are analyzed simplely. The research difficulties and the future research focuses of intelligent material are pointed out.

Abstract: A novel D-A type molecule based on carbazole central core and aldehyde terminal groups has been designed and synthesized. Optical properties of the resulting compounds were examined by means of UV-vis and fluorescence spectroscopies. It shows that, the absorption and fluorescence spectra of M2 are large red-shifted relative to M1 in both states, whereas the absorption maximum and emission maxima of M1 and M2 are small blue-shifted, from solution to the solid state. The fluorescence spectra exhibit that the emission maxima of the compounds which range from 419 nm to 472 nm belong to blue light region. As expected, the target compounds should be a promising pure blue light-emitting material for applications in organic light-emitting diodes (OLEDs).

Abstract: Growth behavior of WC grains with two different sizes of 10 μm and 4 μm in the same liquid matrix has been studied in the WC–40vol.%Ni₃Al system. The samples were sintered under a carbon saturated condition. Surfaces of the coarse WC grains are strongly micro-faceted and stepped. With the increase of sintering time, the average size of the fine WC grain increases continuously and very large plate-like triangular prismatic WC grains appear. The present investigation thus shows that the growth behavior of fine WC grain is affected by lower solubility of W in Ni₃Al matrix and the abnormal growth of WC grains is suppressed. However, the growth behavior of coarse WC grain is governed only by the difference in energy between the facets.

Abstract: nanomelamine phosphate (NMP) flame retardant was synthesized by means of a solvothermal method, and was characterized by Fourier transform infra-red spectroscopy, X-ray diffraction, and scanning electron microscopy. Effects of reaction temperature and reaction time on the morphology of reaction products were investigated. It was observed that the morphology of the products changes greatly as reaction temperature or reaction time changes.

Abstract: Transparent oxyfluoride tellurite glass-ceramics containing CaF₂ nanocrystals were prepared by high temperature melting method. The glass-ceramics were characterized by Differential scanning calorimetry, X-ray diffraction and scanning electron microscope, respectively. The results showed that the CaF₂ nanocrystals were spherical and the average size was found to be 60 nm.