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1
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Journal of Theoretical and Applied Mechanics
1999 nr 4 809-827
PL Analizujemy związki termodynamiczne opisujące równowagę ciała termosprężystego złożonego z wielu faz. Czynimy to w sposób podobny do stosowanego w teorii płynów wielofazowych. Po określeniu przejść fazowych drugiegi i trzeciego rodzaju wyprowadzamy związki typu Clapeyrona--Clausiusza i Ehrenfesta. O[...]
EN The thermodynamic relations describing equilibrium of a multi--phase thermoelastic solid are obtained in a way similar to that used in the multiphase fluid theory. The phase transitions of the first order are defined and equilibrium equations of the Capeyron--Clausius type are derived. Also, the pha[...]
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Prace Naukowe Instytutu Matematyki i Informatyki Politechniki Częstochowskiej
EN The properties of a simple fluid or magnet with strong one-axis anisotropy can be studied by means of the Ising model. Such a model, but in an confined geometry with identical boundary fields, is studied along various thermodynamic paths using the density-matrix renormalization group technique. It h[...]
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Bulletin of the Polish Academy of Sciences. Technical Sciences
EN Effects of confinement on mechanical, structural and thermodynamic properties of uniform fluids are very well understood. In contrast, a general theory based on statistical thermodynamics for confined nonuniform and non-isotropic phases, such as the lamellar phase, is in its infancy. In this review [...]
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Polish Journal of Chemistry
EN Polarized Raman and powder IR spectra for a (NH4)4H3(SeO4)3 crystal were measured at room temperature and discussed with relation to the crystal structure. Additionally, the reflection polarized IR spectra were measured. The transition into a metastable phase was observed for the first heating DSC s[...]
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Journal of Technical Physics
EN The phase diagram for 214 type high-T[c] superconductors is discussed. The Ginzburg-Landau free energy functional is constructed for structural and superconducting phase transitions. The relation of structural distortion to the critical superconducting temperature is analyzed.
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Nukleonika
EN Positron annihilation studies of liquid crystals are reviewed with particular reference to thermotropic liquid crystals with rod-like molecules. The studies of compounds exhibiting smectic A or smectic E phases indicate that local arrangement of dipole molecules play an important role because high e[...]
7
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Studia Informatica : systems and information technology
2007 Vol. 2(9) 69--76
EN The paper presents basic description methods of critical phenomena, i.e. first-order, continuous phase transitions, and an overview of the self-organized criticality concept. In this approach an attempt is made to identify the determinant factors of modeling critical events using cellular automata.
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Materials Science Poland
2014 Vol. 32, No. 2 236--242
EN V2O3 and amorphous carbon composites (V2O3/C composites) with different morphologies (e.g. nanospheres, nanorods and nanosheets) were, for the first time, successfully synthesized by a facile hydrothermal route and subsequent calcination. The as-obtained samples were characterized by X-ray powder di[...]
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Materials Science Poland
2014 Vol. 32, No. 2 297--300
EN Ca2Ce2Ti5O16 dielectric ceramics prepared by conventional solid-state ceramic route was investigated. Phase composition and microwave dielectric properties were measured using XRD and Vector network analyzer, respectively. XRD analysis of the calcined and sintered samples revealed the formation of C[...]
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Nukleonika
EN Crystal and magnetic properties of three equiatomic ternary RERhSn compounds (where RE = Ce, Nd, Gd) have been studied by means of X-ray diffraction, ac, and dc magnetic susceptibility measurements, as well as using Mössbauer spectroscopy with 119Sn and 155Gd resonances. CeRhSn does not order magnet[...]
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Archives of Metallurgy and Materials
EN The high-pressure torsion (HPT) of Ti-Fe alloys with different iron content has been studied at 7 GPa, 5 anvil rotations and rotation speed of 1 rpm. The alloys have been annealed before HPT in such a way that they contained different amounts of α/α' and β phases. In turn, the β phase contained diff[...]
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Central European Journal of Energetic Materials
EN The investigation considers phase stabilization of ammonium nitrate for considerable extension of its application area including new generation of gas-generating compositions for airbag inflators. It was shown that alloys of ammonium nitrate with small amounts (2-10%) of some organic compounds can h[...]
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Materials Science Poland
2004 Vol. 22, No. 4 333--337
EN We have studied the pressure-induced neutral-ionic phase transition of tetrathiafulvalene-chloranil (TTF-CA) with polarized infrared absorption spectra of single crystals inside a diamond anvil cell (DAC). The evolution of the phase transition is complex, implying at least two steps. The nature of t[...]
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Opto - Electronics Review
EN Novel chiral esters with partially fluorinated alkoxyalkoxy terminal chains are described. Their phase transition temperatures, enthalpies, and electrooptical properties are reported. A helical pitch in pure compounds and their mixtures based on selective reflection of light is also characterized.
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Nukleonika
2013 Vol. 58, No. 3 365--370
EN The paper gives a brief review of the results of EPR temperature studies of RbIn(MoO4)2 crystal. A sequence of several structural phase transitions has been found in this crystal in the temperature region 84–163 K. The transition at T1 = 163 K leads to an incommensurate triply modulated state, where[...]
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Opto - Electronics Review
EN Two types of fast switching mixtures with high positive dielectric anisotropy were described. The first type, with a birefringence below 0.3, was designed for devices operating at room or lower temperatures and the second one, with a birefringence higher than 0.3 for devices operating at elevated t[...]
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Archives of Metallurgy and Materials
EN In this work, the syntheses and characterization by mechanical and dielectric spectroscopies of (1-x) Bi0.5Na0.5TiO3-xBaTiO3 (BNT-100xBT), with x = 0.05, 0.06 and 0.07, lead-free piezoelectric ceramics is reported. Ceramic samples of BNT-BT have been prepa[...]
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Materials Science Poland
EN An aqueous colloidal solution was prepared at 80 °C and pH = 9 from suitable chemical compounds to produce zinc oxide (ZnO) crystals and thin films. The ZnO crystals were grown in the colloidal solution under special conditions. Their micrographs showed ZnO rods with hexagonal structure. The number [...]
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Central European Journal of Energetic Materials
2017 Vol. 14, no. 2 361--374
EN To investigate the effects of temperature on the shock initiation characteristics of hexanitrohexaazaisowurtzitane (CL-20), shock initiation experiments on heated C-1 explosive (94% epsilon phase CL-20, and 6% binder, by weight) were performed at temperatures of 20 °C, 48 °C, 75 °C, 95 °C, 125 °C, 1[...]
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Archives of Metallurgy and Materials
2013 Vol. 58, iss. 4 1377--1380
PL Przedstawiono wyniki badań ceramiki (Pb1-x Bax )((Zr1-yTiy) 1-zSnz )O3 (PBZTS) dla stałych wartości parametrów ,v =0,03 i y =0,02 oraz z =0, 0,02, 0,04, 0,06 i 0,08. Badane składy PBZTS znajdują się w pobliżu granicy fazowe[...]
EN We present the results of obtaining and investigations of (Pb1-x Bax )((Zr1-yTiy) 1-zSnz )O3 (PBZTS) ceramics with x =const =0.03, y =const=0.02, z =0, 0.02, 0.04, 0.06 and 0.08. Investigated compositions are close to rhomb[...]
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