ChemInform Abstract: IR Spectra and Electrical Conductivity of the Solid Solutions X MgO + (1-X) α-Nb2O5; 0.01 ≤ X ≤ 0.09.

ChemInform ◽  
2010 ◽  
Vol 23 (32) ◽  
pp. no-no
Author(s):  
Z. PARK ◽  
J. S. PARK ◽  
D. H. LEE ◽  
J. H. JUN ◽  
C. H. YO ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Ir Spectra ◽  
Solid Solutions

Electrical conductivity and structure of solid solutions formed in the La0.8Sr0.2MnO3–La0.95Ni0.6Fe0.4O3 system

2008 ◽  
Vol 179 (27-32) ◽  
pp. 1432-1435 ◽  
Author(s):  
Elena Konysheva ◽  
John T.S. Irvine ◽  
Astrid Besmehn
Keyword(s):  
Electrical Conductivity ◽  
Solid Solutions

Infrared spectra of synthetic almandine–grossular and almandine–pyrope garnet solid solutions: evidence for equivalent site behaviour

1989 ◽  
Vol 53 (370) ◽  
pp. 231-237 ◽  
Author(s):  
C. A. Geiger ◽  
B. Winkler ◽  
K. Langer
Keyword(s):  
Ir Spectra ◽  
Solid Solutions ◽  
Small Volume ◽  
Frequency Shifts ◽  
Short Range Ordering ◽  
Equivalent Site ◽  
Dodecahedral Site ◽  
Volume Of Mixing ◽  
Volumes Of Mixing ◽  
Long Range Ordering

AbstractThe infrared (IR) spectra of almandine-grossular and almandine-pyrope garnet solid solutions have been measured using the powder method. Frequency shifts of a band related to internal vibrations associated with the 8-co-ordinate dodecahedral site are nonlinear in almandine-grossular garnets and mimic the form of its molar volume of mixing curve. Almandine-pyrope solid solutions have nearly ideal molar volumes of mixing and the frequency shift of this same 8-co-ordinate site-related band is linear. The IR data support the empirically based crystal chemical model of Equivalent Site (ES) behaviour (Newton and Wood, 1980). The IR spectra give no indication of long-range ordering between Ca and Fe2+ in garnet, but thermodynamic calculations involving Ca-poor garnets might be affected by small volume or short-range ordering anomalies.

scholarly journals SYNTHESIS AND ELECTRICAL CONDUCTIVITY OF SOLID SOLUTIONS OF THE SYSTEM RbF-PbF2-SnF2

2019 ◽  
Vol 85 (5) ◽  
pp. 60-68
Author(s):  
Yuliay Pogorenko ◽  
Anatoliy Omel’chuk ◽  
Roman Pshenichny ◽  
Anton Nagornyi
Keyword(s):  
Activation Energy ◽  
Electrical Conductivity ◽  
Temperature Dependence ◽  
Solid Solutions ◽  
Basic Structure ◽  
Elementary Cell ◽  
Initial Structure ◽  
Fluoride Ions ◽  
Temperature Range ◽  
Order Of Magnitude

In the system RbF–PbF2–SnF2 are formed solid solutions of the heterovalent substitution RbxPb0,86‑xSn1,14F4-x (0 < x ≤ 0,2) with structure of β–PbSnF4. At x > 0,2 on the X-ray diffractograms, in addition to the basic structure, additional peaks are recorded that do not correspond to the reflexes of the individual fluorides and can indicate the formation of a mixture of solid solutions of different composition. For single-phase solid solutions, the calculated parameters of the crystal lattice are satisfactorily described by the Vegard rule. The introduction of ions of Rb+ into the initial structure leads to an increase in the parameter a of the elementary cell from 5.967 for x = 0 to 5.970 for x = 0.20. The replacement of a part of leads ions to rubium ions an increase in electrical conductivity compared with β–PbSnF4 and Pb0.86Sn1.14F4. Insignificant substitution (up to 3.0 mol%) of ions Pb2+ at Rb+ at T<500 K per order of magnitude reduces the conductivity of the samples obtained, while the nature of its temperature dependence is similar to the temperature dependence of the conductivity of the sample β-PbSnF4. By replacing 5 mol. % of ions with Pb2+ on Rb+, the fluoride ion conductivity at T> 450 K is higher than the conductivity of the initial sample Pb0,86Sn1,14F4 and at temperatures below 450 K by an order of magnitude smaller. With further increase in the content of RbF the electrical conductivity of the samples increases throughout the temperature range, reaching the maximum values at x≥0.15 (σ573 = 0.34–0.41 S/cm, Ea = 0.16 eV and σ373 = (5.34–8.16)•10-2 S/cm, Ea = 0.48–0.51 eV, respectively). In the general case, the replacement of a part of the ions of Pb2+ with Rb+ to an increase in the electrical conductivity of the samples throughout the temperature range. The activation energy of conductivity with an increase in the content of RbF in the low-temperature region in the general case increases, and at temperatures above 400 K is inversely proportional decreasing. The nature of the dependence of the activation energy on the concentration of the heterovalent substituent and its value indicate that the conductivity of the samples obtained increases with an increase in the vacancies of fluoride ions in the structure of the solid solutions.

scholarly journals Термоэлектрические свойства твердых растворов (CuInSe-=SUB=-2-=/SUB=-)-=SUB=-1-x-=/SUB=-(In-=SUB=-2-=/SUB=-Te-=SUB=-3-=/SUB=-)-=SUB=-x-=/SUB=-

2022 ◽  
Vol 56 (1) ◽  
pp. 38
Author(s):  
Ч.И. Абилов ◽  
М.Ш. Гасанова ◽  
Н.Т. Гусейнова ◽  
Э.К. Касумова
Keyword(s):  
Thermal Conductivity ◽  
Electrical Conductivity ◽  
Solid Solutions ◽  
Figure Of Merit ◽  
Charge Carriers ◽  
Thermoelectric Figure Of Merit ◽  
Thermoelectric Figure ◽  
Mobility Of Charge Carriers ◽  
Temperature Dependences ◽  
Thermoelectric Coefficient

The results of studying the temperature dependences of electrical conductivity, thermoelectric coefficient, Hall mobility of charge carriers, total and electronic thermal conductivity, as well as phonon thermal resistance of alloys of (CuInSe2)1-x(In2Te3)x solid solutions at x=0.005 and 0.0075 are presented. The values ​​of these parameters for certain temperatures were used to calculate the values ​​of the thermoelectric figure of merit of the indicated compositions. It turned out that as the temperature rises, the thermoelectric figure of merit tends to grow strongly, from which it can be concluded that these materials can be used in the manufacture of thermoelements.

scholarly journals Температурные зависимости электропроводности и магнитной восприимчивости кристаллов твердых растворов Sb-=SUB=-2-=/SUB=-Te-=SUB=-3-=/SUB=--Bi-=SUB=-2-=/SUB=-Te-=SUB=-3-=/SUB=-

2021 ◽  
Vol 55 (12) ◽  
pp. 1162
Author(s):  
Н.П. Степанов ◽  
В.Ю. Наливкин ◽  
А.К. Гильфанов ◽  
А.А. Калашников ◽  
Е.Н. Трубицына
Keyword(s):  
Electrical Conductivity ◽  
Magnetic Susceptibility ◽  
Solid Solutions ◽  
Thermoelectric Materials ◽  
Materials Science ◽  
Practical Importance ◽  
Experimental Studies ◽  
Electronic System ◽  
Temperature Dependences ◽  
The Subject

Solid solutions Bi2Te3-Sb2Te3 continue to be the subject of numerous and versatile experimental studies due to their practical importance for thermoelectric materials science. In this regard, the problem of studying the regularities of changes in the state of the electronic system of these semiconductors from composition and temperature remains urgent. This paper presents the results of studying the temperature dependences of the magnetic susceptibility of Bi2Te3-Sb2Te3 crystals containing 10, 25, 40, 50, 60 mol. % Sb2Te3. The correlation of the behavior of the temperature dependences of the magnetic susceptibility and electrical conductivity is analyzed.

scholarly journals Растворимость теллура в кристаллах TlGaTe-=SUB=-2-=/SUB=-, TlInTe-=SUB=-2-=/SUB=- и электрофизические свойства твердых растворов

2018 ◽  
Vol 60 (9) ◽  
pp. 1656
Author(s):  
А.И. Наджафов ◽  
Н.А. Алиева ◽  
К.Г. Халилова
Keyword(s):  
Phase Transition ◽  
Electrical Conductivity ◽  
Solid Solutions ◽  
Physicochemical Analysis ◽  
Lattice Parameters ◽  
Temperature Dependences ◽  
Complex Methods

AbstractThe complex methods of the physicochemical analysis are used to study TlGaTe_2–Te and TlInTe_2–Te alloys in which the tellurium solubility region up to 5.0 at % is observed. The temperature dependences of the lattice parameters and the electrical conductivity of TlGaTe_2 + x and TlInTe_2 + x have been studied in different crystallographic directions. The TlGaTe_2 + x and TlInTe_2 + x solid solutions undergo a phase transition at a temperature of 498 K. The transition nature is interpreted.

Electrical Conductivity and Phase Transitions in Ferroelectric Solid Solutions Li0.17Na0.83ТауNb1-уO3 (y = 0 – 0.5) in High Pressure

2020 ◽  
Vol 310 ◽  
pp. 6-13
Author(s):  
Vadim V. Efremov ◽  
Mikhail N. Palatnikov ◽  
Yuriy V. Radyush ◽  
Olga B. Shcherbina
Keyword(s):  
Solid Solution ◽  
Electrical Conductivity ◽  
High Pressure ◽  
Phase Transitions ◽  
Solid Solutions ◽  
Synthesis Method ◽  
Ferroelectric Ceramic ◽  
Synthesis Temperature ◽  
Structure Phase ◽  
Ceramic Solid Solution

Ferroelectric ceramic solid solutions LixNa1-xTayNb1-yO3 (х = 0.17; у = 0 – 0.5) with the perovskite structure have been obtained by the thermobaric synthesis method. Particularities of their microstructure, elastic properties, electrical conductivity and permittivity have been researched. It has been established that an increase in the thermobaric synthesis temperature leads to a decrease in the Young’s modulus value. Specific static conductivity values have been determined; charge carrier activation enthalpies На have been calculated. The Curie temperature of the samples has been determined to decrease with an increase in tantalum content. A Ferroelectric ceramic solid solution Li0.17Na0.83Ta0.1Nb0.9O3 was shown to undergo four structure phase transitions in the temperature range 300-820 К. A Li0.17Na0.83Ta0.1Nb0.9O3 has been shown to be a high temperature superionic. Possible mechanisms of the detected phenomena are discussed.

Electrical conductivity of the solid solutions XGd2O3 + (1 −X)ThO2; 0.01⩽X⩽0.12

1989 ◽  
Vol 50 (10) ◽  
pp. 1027-1031 ◽  
Author(s):  
Keu Hong Kim ◽  
Do Young Yim ◽  
Kyung Moon Choi ◽  
Jae Shi Choi ◽  
Robert G. Sauer
Keyword(s):  
Electrical Conductivity ◽  
Solid Solutions
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