226 research outputs found
Characterisation by EPR and other techniques of La1-xCexCoO3+delta perovskite-like catalysts for methane flameless combustion
No full textTwo differently prepared series of La1-xCexCoO3 (x=0, 0.05, 0.1, 0.2), indicated by A and C, have been analysed by EPR at temperature ranging between 95 and 295 K, both before and after their use as catalysts for methane flameless combustion. At progressively lowering temperature, some samples showed a narrowing Lorentzian-shaped pattern. This has been attributed to the formation of ordered layer-like systems. A different behaviour has been noticed with the x=0.1 samples of both series. The formation of spin bags and of spin glass has been hypothesised with these samples. A correlation between EPR spectra and catalytic performance has been highlighted. (C) 2001 Elsevier Science B.V. All rights reserved
Synthesis and identification of parameters of regenerative device for reversing link with increasing speed
No full textDubinin N. N. Synthesis and identification of parameters of regenerative device for reversing link with increasing speed / N. N. Dubinin, S. A. Mikhailichenko, S. I. Goncharov // IOP Conf. Series: Materials Science and Engineering. - 2018. - Vol.327. - 042025.The article shows the problem of modeling the flow of fibrous suspension in the working bodies of mixing machines. A mathematical model describing the motion of a suspension with fibrous inclusions in a wet-type disintegrator, depending on the design of the accelerating unit and the operating device is obtained
Synthesis and identification of the parameters of the regenerative device for reversing the link with increasing speed
No full textDubinin N. N. Synthesis and identification of the parameters of the regenerative device for reversing the link with increasing speed / N. N. Dubinin, S. A. Mikhailichenko, S. I. Goncharov // IOP Conf. Series: Materials Science and Engineering. - 2018. - Vol.327. - 042025.The article shows the problem of modeling the flow of fibrous suspension in the working bodies of mixing machines. A mathematical model describing the motion of a suspension with fibrous inclusions in a wet-type disintegrator, depending on the design of the accelerating unit and the operating device is obtained
Research of movement process of fiber suspension in accelerating unit of wet grinding disintegrator
No full textResearch of movement process of fiber suspension in accelerating unit of wet grinding disintegrator / S. A. Mikhailichenko [et al.] // IOP Conf. Series: Materials Science and Engineering. - 2018. - Vol.327. - 042070.At the present stage of development of building material science, products reinforced with fibers of various origin (mineral, organic, metal and others) are commonly used. Determination of the optimal structure and the chemical composition of the fiber depends on a number of requirements for filler, binder, and other miscellaneous additives, etc. The rational combination of physical and chemical composition of the primary matrix of the product (e.g., binders, cement) with dispersion of anisotropic fiber of filler not only contributes to the strength of products, but also stabilizes their internal structure: prevents the occurrence of internal stress of the cement stone, increases the adhesive interaction of particles of cement at the contact boundary with fibers, etc
Pulsed Undulator for Test at SLAC the Polarized Positron Production
No full textWe represent technical details and results of testing pulsed undulator with ~2-mm period, K~0.1, manufactured by Cornell LEPP for test of polarized positron production at SLAC
Form-factor for a target used for positron generation with undulator radiation conversion
No full text
- …
