scholarly journals Studies of concentration dependences in the luminescence of Ti-doped Al2O3

2011 ◽  
Vol 109 (5) ◽  
pp. 053116 ◽  
Author(s):  
V. B. Mikhailik ◽  
P. C. F. Di Stefano ◽  
S. Henry ◽  
H. Kraus ◽  
A. Lynch ◽  
...  
Keyword(s):  
Concentration Dependences

A discussion on equations of phase equilibrium between two regular binary phases

1981 ◽  
Vol 46 (6) ◽  
pp. 1433-1438
Author(s):  
Jan Vřešťál
Keyword(s):  
Phase Equilibrium ◽  
Linear Function ◽  
Concentration Dependence ◽  
Absolute Temperature ◽  
Enthalpy Change ◽  
Independent Parameter ◽  
Free Enthalpy ◽  
Regular Solutions ◽  
Regular Model ◽  
Concentration Dependences

The conditions of the existence of extreme on the concentration dependences of absolute temperature (x are mole fractions) T = Tα(xkα) and T = Tβ(xkβ) denoting equilibrium between two binary regular solutions are generally developed under two assumptions: 1) Free enthalpy change of pure components k = i, j at transition from phase α to β is a linear function of temperature. 2) Concentration dependence of excess free enthalpy (identical with enthalpy) of solutions α and β, respectively, is described in regular model by one concentration and temperature independent parameter for each individual phase.

Reorientational dynamics of highly asymmetric binary non-polymeric mixtures – a dielectric spectroscopy study

2021 ◽  
Vol 23 (12) ◽  
pp. 7200-7212 ◽  
Author(s):  
Thomas Körber ◽  
Felix Krohn ◽  
Christian Neuber ◽  
Hans-Werner Schmidt ◽  
Ernst A. Rössler
Keyword(s):  
Dielectric Spectroscopy ◽  
Spectroscopy Study ◽  
Concentration Dependences ◽  
Temperature Dependences ◽  
Reorientational Dynamics

Two separated relaxations α1 and α2 with different temperature dependences are identified in the mixtures. They are attributed to the dynamics associated with the high-Tg (α1) and the low-Tg component (α2) with distinct Tg concentration dependences.

Concentration dependences of dielectric properties at 105 Hz and 106 Hz for aqueous solutions of hydroxypropyl cellulose

2007 ◽  
Vol 34 (9) ◽  
pp. 1019-1028 ◽  
Author(s):  
Katsufumi Tanaka ◽  
Takatoshi Morina ◽  
Yuichiro Tanabe ◽  
Ryuichi Akiyama
Keyword(s):  
Dielectric Properties ◽  
Aqueous Solutions ◽  
Hydroxypropyl Cellulose ◽  
Concentration Dependences

Photoluminescence of Heavily p-Type-Doped GaAs: Temperature and Concentration Dependences

1994 ◽  
Vol 33 (Part 1, No. 4A) ◽  
pp. 1920-1927 ◽  
Author(s):  
Horng Dar Chen ◽  
Ming Shiann Feng ◽  
Po An Chen ◽  
Kun Chuan Lin ◽  
Janne Wha Wu
Keyword(s):  
Concentration Dependences ◽  
P Type

Thermodynamical study of (CaGa2S4)x(BaGa2S4)1−x solid solutions

2021 ◽  
pp. 2150469
Author(s):  
T. G. Naghiyev ◽  
R. M. Rzayev
Keyword(s):  
Free Energy ◽  
Solid Solutions ◽  
Calculation Method ◽  
Solid Phase ◽  
Ternary Compounds ◽  
Free Energy Of Formation ◽  
Concentration Dependences ◽  
Solid Phase Reactions ◽  
Two Phases ◽  
Energy Of Formation

The solid solutions of [Formula: see text] were synthesized by solid-phase reactions from powder components of CaS, BaS, and Ga2S3. The temperature-concentration dependences of the Gibbs free energy of formation of [Formula: see text] solid solutions from ternary compounds and phase diagrams of the CaGa2S4–BaGa2S4 were determined by a calculation method. It was revealed that continuous solid solutions are formed in these systems. The spinodal decomposition of [Formula: see text] solid solutions into two phases is predicted at ordinary temperatures.

scholarly journals The interdiffusion in liquid alloys of alkali metals with lead

2021 ◽  
Vol 2119 (1) ◽  
pp. 012142
Author(s):  
R N Abdullaev ◽  
R A Khairulin ◽  
S V Stankus
Keyword(s):  
Short Range ◽  
Alkali Metals ◽  
Gamma Ray ◽  
Liquid Alloys ◽  
Short Range Ordering ◽  
Concentration Dependences ◽  
Lead Alloys ◽  
Liquid Cesium ◽  
Liquid Systems ◽  
Gamma Ray Attenuation

Abstract The mutual diffusion in liquid cesium-lead alloys containing from 20 to 70 at.% Pb is investigated by a gamma-ray attenuation technique. The obtained data are compared with the results of similar studies for Li-Pb, Na-Pb, and K-Pb melts, carried out by us earlier. The concentration dependences of the interdiffusion coefficient for alkali-lead liquid systems demonstrate pronounced maxima in the vicinity of 20 or 50 at.% Pb. These phenomena confirm a tendency for chemical short-range ordering in liquid alloys.

scholarly journals Эффективная диэлектрическая проницаемость анизотропного композита из сфероидных частиц в диэлектрической матрице

2021 ◽  
Vol 47 (23) ◽  
pp. 22
Author(s):  
Б.А. Беляев ◽  
В.В. Тюрнев ◽  
С.А. Ходенков
Keyword(s):  
Numerical Solution ◽  
Integral Equations ◽  
Electromagnetic Waves ◽  
Effective Permittivity ◽  
Transverse Polarization ◽  
Dielectric Matrix ◽  
Anisotropic Composite ◽  
Concentration Dependences ◽  
The Matrix

The concentration dependences of the effective permittivity of an anisotropic composite containing co-directional particles in the form of oblate or elongated ellipsoids of rotation – spheroids – in the dielectric matrix are obtained. The calculation is made by the numerical solution of a system of coupled quadratic and integral equations obtained by a strict modification of the quasi-static Bruggeman theory. It is shown that the traditional (simplified) modification of the Bruggeman theory, widely used for calculating anisotropic composites, gives errors of different signs for the longitudinal and transverse polarization of electromagnetic waves relative to the axis of spheroids. In this case, the dependences of errors on the concentration of particles are non-monotonic, and the extremes observed on them can exceed 100%. Moreover, the position and magnitude of the extremes strongly depend on the ellipticity of the particles, as well as on the contrast of their permittivity with the matrix.

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