Microdeformations of the crystal lattice of PbTe1 − x Br x solid solutions

Research has been performed into baric dependences between electrical resistance and thermo-EMF of eutectic solid solutions based on cadmium diarsenide of various compositions (Cd0.97Zn0.03As2 and Cd0.95Zn0.05As2) at pressures from 16 to 50 GPa and room temperature. Pressures were created in a chamber with conducting diamond anvils that served as contacts with the sample. Structural changes were recorded by changing electrical resistance and thermo-EMF. When replacing cadmium atom, zinc forms closer bonds with arsenic, which must result in the crystal lattice strengthening and higher pressures of phase transitions. Solid solutions preserve phase transitions observed in pure cadmium diarsenide. An increase in the crystal lattice stability of the solutions is confirmed compared to initial cadmium diarsenide. It is shown that with an increase in the zinc concentration pressures of phase transitions are shifted into the zone of higher pressures. The compounds preserve electronic conductivity in the range of pressures under consideration. At pressures higher than 30 GPa the thermo-EMF values become close to zero. This may be due to both an increase on concentrations of minority charge carriers and the impact of additional donating levels in the forbidden zone of solid solutions.

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The formation of rhodochrosite–smithsonite (MnCO3–ZnCO3) solid-solutions at 5°C

Mineralogical Magazine ◽

10.1180/minmag.1995.059.396.09 ◽

1995 ◽

Vol 59 (396) ◽

pp. 481-488 ◽

Cited By ~ 2

Author(s):

Michael E. Böttcher

Keyword(s):

Aqueous Solution ◽

Infrared Spectroscopy ◽

Aqueous Solutions ◽

Crystal Lattice ◽

Powder Diffraction ◽

Solid Solutions ◽

Solubility Product ◽

Experimental Conditions ◽

X Ray ◽

Bicarbonate Solutions

AbstractMnxZn(1−x)CO3 solid-solutions were prepared at 5°C by precipitation from metal-bearing bicarbonate solutions. The solids were identified by X-ray powder diffraction and infrared spectroscopy. Zn2+ ions substitute extensively for Mn2+ ions in the crystal lattice of anhydrous rhombohedral carbonates. Throughout the 24 h during which the experiments were conducted, the aqueous solutions remained undersaturated with respect to pure oxides, sulphates, hydroxides and hydroxysulphates. The solutions, however, were supersaturated with MnxZn(1−x)CO3 of any given composition. Besides the anhydrous rhombohedral carbonates, Zn4(OH)2(CO3)3·4H2O was precipitated from an aqueous solution with initially high Zn2+ concentration. The negative logarithm of the solubility product of Zn4(OH)2(CO3)3·4H2O was estimated theoretically to be 43.9 (25°C). Remaining saturation with respect to Zn4(OH)2(CO3)3·4H2O was calculated accordingly. The suggestion is made that hydrated zinc hydroxycarbonate is metastable under the experimental conditions used here, but that it should transform into anhydrous carbonates.

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Influence of crystal lattice defectiveness on the properties of solid solutions based on ZrO2

Refractories ◽

10.1007/bf01386717 ◽

1987 ◽

Vol 28 (1-2) ◽

pp. 13-16 ◽

Cited By ~ 1

Author(s):

T. V. Chusovitina ◽

V. M. Ust'yantsev ◽

M. G. Tretnikova ◽

Yu. S. Toropov

Keyword(s):

Crystal Lattice ◽

Solid Solutions

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Rhombic distortion of the crystal lattice in the solid solutions CrN-MN, where M=Sc, Ti, V, or Mn

Journal of Structural Chemistry ◽

10.1007/bf00755452 ◽

1976 ◽

Vol 17 (2) ◽

pp. 267-270 ◽

Cited By ~ 1

Author(s):

M. I. Aivazov ◽

T. V. Rezchikova ◽

V. F. Degtyareva

Keyword(s):

Crystal Lattice ◽

Solid Solutions ◽

Rhombic Distortion

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Iron nanoparticle influence on the structure of improved structural steel and its properties

Metaloznavstvo ta obrobka metalìv ◽

10.15407/mom2020.04.010 ◽

2020 ◽

Vol 96 (4) ◽

pp. 10-16

Author(s):

Y. G. Aftandiliants ◽

◽

К.G. Lopatko ◽

Keyword(s):

Crystal Lattice ◽

Solid Solutions ◽

Iron Nanoparticles ◽

High Stress ◽

Coherent Scattering ◽

Hardened Steel ◽

Lattice Parameters ◽

Subgrain Structure ◽

Melt Temperature ◽

Crystal Lattice Parameters

The results of the study of the effect of nanoparticles in the shell of iron oxide Fe2O3, which when injected into the melt and heated up to melt temperature is converted into oxide Fe3O4, on the microstructure of hardened and tempered steel 25GSL and its properties. It is shown that in modified steel martensite crystals thickness is reduced compared to the original steel in average 1.9 times after the quenching, tempered martensite crystal length after tempering hardened steel at 200oC - 3 times, the plate cementite length in troostite after tempering hardened steel at 450 оС – 1,4 times, the carbide length of after tempering of steel at 550 оС – 1,6 times. It has been found that modification of iron nanoparticles in a shell of Fe3O4 oxide leads to dispersion of the subgrain structure (regions of coherent scattering) and to the decrease of the crystal lattice parameters of solid solutions. The mechanism of nanoparticle influence on the reduction of the crystal lattice parameters of solid solutions, which is to accelerate the diffusion of interstitial atoms of the elements into the zones of high stress on the nanoparticles surface, is proposed. It is determined that the optimal improvement mode of the modified steel is quenching at 900 °C and tempering at 550 °C. The yield, tensile strengths and toughness of the modified steel are 894 MPa, 993 MPa and 92 J/mm2, respectively, on 62, 41 and 14% higher than the original steel. The injection of iron nanoparticles in a refractory shell into the steel melt before crystallization predetermines the effective modification and enhancement of mechanical properties. Keywords: iron nanoparticles, structure, martensite, troostite, sorbite, carbides, stresses, phase transformations.

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The dynamics of crystal lattice of solid solutions based on zirconium dioxide

Journal of Physical Studies ◽

10.30970/jps.25.4601 ◽

2021 ◽

Vol 25 (4) ◽

Author(s):

V. I. Slisenko ◽

O. E. Zoteev ◽

O. A. Vasylkevych ◽

V. O. Zoteev ◽

V. V. Krotenko

Keyword(s):

Crystal Lattice ◽

Solid Solutions ◽

Zirconium Dioxide

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Synthesis, structure and properties of solid solutions Ва1–хSn1+хF4 and (KyВа1–y)(1–х)Sn1+хF4–y(1–х)

Voprosy Khimii i Khimicheskoi Tekhnologii ◽

10.32434/0321-4095-2021-134-1-62-70 ◽

2021 ◽

pp. 62-70

Author(s):

R.M. Pshenychnyi ◽

◽

T.V. Pavlenko ◽

Yu.V. Pohorenko ◽

A.O. Omel'chuk ◽

...

Keyword(s):

Solid Solution ◽

Electrical Conductivity ◽

Crystal Lattice ◽

Electric Conductivity ◽

Solid Solutions ◽

Initial Phase ◽

Potassium Ions ◽

Heterovalent Substitution ◽

Structure And Properties ◽

Barium Ions

We investigated the structure and electric conductivity of solid solutions of homovalent substitution Ва1–хSn1+хF4 (where х=0.03, 0.05, 0.07, 0.10, 0.15 and 0.23) and heterovalent substitution (KyВа1–y)(1–х)Sn1+хF4–y(1–х) (where х=0.03, 0.05, 0.10 and у=0.03, 0.05, 0.10) with the structure of BaSnF4. It was been found that the substitution of 7 mol.% of Ba2+ cations by Sn2+ cations contributed to an increases in electrical conductivity. The solid solution Ba0.77Sn1.23F4 had the highest electrical conductivity (573=6.8010–3 S cm–1). The substitution of barium ions by potassium ions in the BaSnF4 crystal lattice allowed reducing the conductivity of solid solutions regardless of the substituent content. Only the phases containing more than 3 mol.% of K+ ions exhibited the conductivity which exceeded the value of the initial phase at the temperatures above 385 K. In fluoride-conducting phases (KyBa1–y)(1–x)Sn1+xF4–y(1–х), the following solid solutions showed the highest electrical conductivity: (K0.05Ba0.95)0.97Sn1.03F3.95 (573=6.7810–4 S сm–1), (K0.03Ba0.97)0.95Sn1.05F3.97 (573=1.0010–3 S сm–1) and (K0.10Ba0.90)0.90Sn1.10F3.91 (573=8.7010–3 S сm–1).

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