Papers by Keyword: Carbon Particles

Abstract: Barium hexaferrite (BaFe₁₂O₁₉) nano- pigment is a pigment with high near infrared reflection in the wavelength range of 1400-2500 nm. The BaFe₁₂O₁₉ nano- pigments were synthesized by the traditional and modified polyacrylamide gel method and characterized by thermogravimetric and differential scanning calorimetry (TG-DSC) analyses, X-ray powder diffraction (XRD), fourier transform infrared (FTIR), transmission electron microscopy (TEM), and UV-Visible spectrophotometer. The physicochemical properties of BaFe₁₂O₁₉ nanopigments are strongly dependent on the synthesis route. The introduction of carbon particles into the BaFe₁₂O₁₉ precursor accelerates the formation of BaFe₁₂O₁₉ phase, reduces its particle diameter and changes its color properties. The modified polyacrylamide gel method makes it possible to obtain a high efficient near infrared reflection BaFe₁₂O₁₉ nano- pigments with a solar reflectance SR>90%. The high near infrared reflection makes BaFe₁₂O₁₉ nano- pigments have potential applications in the field of heat shielding.

Abstract: Analysis of contemporary cyclone gas purification apparatus was carried out in this article Calculation of the characteristics of the counterflow cyclone in application of pressurization system of the LV fuel tanks with gas pressure accumulator has been executed. 3D-model of the counter-flow cyclone was built. Numerical modeling of soot-cleaning process in countercurrent cyclone has been performed using ANSYS Fluent.

Abstract: The object of our project is a design and verification of composite elements of defined shape with effective content of carbon particles and fibers. These composites should be able to monitor internal state of selected structural elements in order to eliminate negative effects of loading.

Abstract: The wear behavior of CFRP laminates with nano-particles dispersed surfaces of Al2O3 or carbon has been investigated and compared with that of conventional CFRP which is without particles dispersed surfaces. As a result of comparison, it is shown that the CFRP laminate with Al2O3 nano-particles dispersed surfaces inherently had low coefficient of friction and high sliding wear resistance. The measured value of specific wear rate was 3.5x10-7mm3/Nm, independently of sliding time. The wear behavior of CFRP laminates with carbon nano-particles dispersed surfaces has been more effectively improved. The measured specific wear rate of this material was in the range of 10－ 7mm3/Nm in spite of comparatively small amount of nano-particles dispersion, which is relatively good as tribomaterial. For the successful application of this method, it is essential to explore the optimum amount of Al2O3 or carbon nano-particles to be dispersed onto prepreg surfaces. The deflocculation of the agglomerated particles and their homogeneous dispersion and good impregnation are the key points in this technology.