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Характеристика муллито-циркониевой керамики, полученной из порошков, синтезированных гидротермальным способом
No full textПриведены результаты исследований по изучению влияния гидротермального способа синтеза исходных порошков с примененнием химических реагентов и иллитовой глины в качесте исходных компонентов, на фазовый состав и структуру, так и некоторыe свойства муллито – ZrO2 керамики.
Показано, что в спекшемся керамическом материале сильно развита муллитовая, ZrO2 тетрагональная модификации, имеется таже наличие закрытых пор. С ростом температуры обжига, как и особенно с добавкой иллитовой глины спекаемость и следовательно прочность на сжатие повышаются. Модуль упругости при увеличении температурной разницы до 1000/200С, как и с добавкой иллитовой глины при термоударе возрастают до (соответсвенно)35 и 95 ГПа, в то время как при 500/20 – 20 и 22 ГП
Indanedione Based Binary Chromophore Supramolecular Systems as a NLO Active Polymer Composites
No full textNovel route to obtain EO material is proposed by supramolecular assembly of neutral-ground-state (NGS) and zwitterionic (ZWI) NLO chromophores in binary chromophore organic glass (BCOG) host-guest system. On a basis of our Langeven Dynamics (LD) molecular modeling combined with quantum chemical calculations, we have shown that anticipated enhancement NLO efficiency of BCOG material is possible via electrostatic supramolecular assembly of NGS with ZWI chromophore in antiparallel manner. Binding energy of such complex could be more dependent on molecular compatibility of components and local (atomic) charge distribution, then overall molecular dipole moments. According to our LD simulations these supramolecular bind structures of NGS and ZWI chromophores can sustain thermally assisted electrical field poling. For the one of experimentally investigated systems, build from dimethylaminobenzylidene 1,3-indanedione containing host and zwitterionic indanedione-1,3 pyridinium betaine as a guest, almost twofold enhancement of NLO efficiency was observed
Quantification of Push-Pull Character of Azo Dyes and a Basis for Their Evaluation as Potential Nonlinear Optical Materials
No full textThe push–pull character of a series of para-phenyl substituted isophorone chromophores has been quantified by the 13C chemical shift difference of the three conjugated partial Cdouble bond; length as m-dashC double bonds and the quotient of the occupations of both the bonding and anti-bonding orbitals of these Cdouble bond; length as m-dashC double bonds as well. The correlations of the two push–pull quantifying parameters, and to the corresponding bond lengths, strongly recommend View the MathML sourceπCC∗/πCdouble bond; length as m-dashC as the general parameter to estimate charge alternation and as a very useful indication of the molecular hyperpolarizabilities for NLO application of the compounds studied
New Method for Complicated Automation Systems Simulation Test
No full textThis paper describes a new method for complicated automation systems testing, particularly, power systems protective relays hardware and real-time software. Test platform is based on Monte-Carlo utilization. A simulator produces voltage and current levels and protection device settings. A control program performs test case generation, waveform production, event identification, and result comparison. This paper will discuss the advantages of stochastic approach and determination of test case number necessary to achieve the desirable level of confidence
Polyisoprene-Nanostructured Carbon Composite (PNCC) Material for Volatile Organic Compound Detection
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Physical Properties of Gallium Dopped Zinc Oxide Coating on Two Different Roll to Roll Substrates
No full textMechatronics systems very often are connected with new materials application.Such materials are created in micro process engineering like special coatings. In this paper is discused Gallium dopped Zinc oxide (GZ0) coating on two different polyethylene substrates
