An analysis of the high-temperature phase structure of multiferroic solid solutions of the PFW-PT

2016 ◽  
Vol 248 (3) ◽  
pp. 23-32
Author(s):  
A.A. Naberezhnov ◽  
I.A. Dolgakov ◽  
M. Tovar ◽  
O.A. Alekseeva ◽  
S.B. Vakhrushev
Keyword(s):  
High Temperature ◽  
Solid Solutions ◽  
Phase Structure ◽  
High Temperature Phase ◽  
Temperature Phase

scholarly journals An analysis of the high-temperature phase structure of multiferroic solid solutions of the PFW–PT

2016 ◽  
Vol 2 (3) ◽  
pp. 181-187
Author(s):  
Aleksandr A. Naberezhnov ◽  
Ivan A. Dolgakov ◽  
Mikhael Tovar ◽  
Olga A. Alekseeva ◽  
Sergey B. Vakhrushev
Keyword(s):  
High Temperature ◽  
Solid Solutions ◽  
Phase Structure ◽  
High Temperature Phase ◽  
Temperature Phase

scholarly journals Stabilization of Superionic-Conducting High-Temperature Phase of Li(Cb9h10) via Solid Solution Formation with Li2(B12H12)

Crystals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 330
Author(s):  
Sangryun Kim ◽  
Kazuaki Kisu ◽  
Shin-ichi Orimo
Keyword(s):  
High Temperature ◽  
Solid Solutions ◽  
Ionic Conduction ◽  
Lithium Ion ◽  
High Temperature Phase ◽  
Temperature Phase ◽  
Solid Solution Formation ◽  
Low X ◽  
T Phase ◽  
Complex Anions

We report the stabilization of the high-temperature (high-T) phase of lithium carba-closo-decaborate, Li(CB9H10), via the formation of solid solutions in a Li(CB9H10)-Li2(B12H12) quasi-binary system. Li(CB9H10)-based solid solutions in which [CB9H10]− is replaced by [B12H12]2− were obtained at compositions with low x values in the (1−x)Li(CB9H10)−xLi2(B12H12) system. An increase in the extent of [B12H12]2− substitution promoted stabilization of the high-T phase of Li(CB9H10), resulting in an increase in the lithium-ion conductivity. Superionic conductivities of over 10−3 S cm−1 were achieved for the compounds with 0.2 ≤ x ≤ 0.4. In addition, a comparison of the Li(CB9H10)−Li2(B12H12) system and the Li(CB9H10)−Li(CB11H12) system suggests that the valence of the complex anions plays an important role in the ionic conduction. In battery tests, an all-solid-state Li–TiS2 cell employing 0.6Li(CB9H10)−0.4Li2(B12H12) (x = 0.4) as a solid electrolyte presented reversible battery reactions during repeated discharge–charge cycles. The current study offers an insight into strategies to develop complex hydride solid electrolytes.

HREM studies of modulated structures of the monoclinic (B) phase in CaO-Dy2O3 solid solutions

1990 ◽  
Vol 48 (4) ◽  
pp. 218-219
Author(s):  
Y. J. Kim ◽  
W. M. Kriven
Keyword(s):  
High Temperature ◽  
Solid Solutions ◽  
Room Temperature ◽  
Rapid Quenching ◽  
High Temperature Phase ◽  
Temperature Phase ◽  
Volume Increase ◽  
Normal Lattice ◽  
Modulated Structures ◽  
Moderate Resolution

Dysprosia (Dy203) undergoes a monoclinic (B) to cubic (C) transformation on cooling through 1860°C, which is accompanied by an 8% volume increase and shattering. Minor additions of CaO combined with rapid quenching, however, are able to stabilize the high temperature phase at room temperature, which is incommensurately modulated. TEM studies revealed the existence of three different modulations: q1 (001-type; λ ≈ 9.0 Å), q2 (200-type; λ ≈ 7.5 Å), and q3 (λ ≈ 40 Å). HREM studies on modulated specimens have been conducted to search for the origin of these modulated microstructures.Fig. 1 shows characteristic modulations in the [010]B orientation. Whereas both q1 and q2 look like normal lattice fringes in moderate resolution TEM images, HREM images indicate that they are actually not strictly linear but somewhat displaced. This discontinuity is more obvious in the HREM images displaying separate q1 and q2 modulations such as q1 in the [110] orientation (Fig. 2) and q2 in the [011] orientation (Fig. 3).

Low- and high-temperature structures of neopentylglycol plastic crystal

1993 ◽  
Vol 8 (2) ◽  
pp. 109-117 ◽  
Author(s):  
Dhanesh Chandra ◽  
Cynthia S. Day ◽  
Charles S. Barrett
Keyword(s):  
High Temperature ◽  
Phase Structure ◽  
Binary Systems ◽  
Structural Parameters ◽  
High Temperature Phase ◽  
Temperature Phase ◽  
Space Group ◽  
Plastic Crystals ◽  
Cell Dimensions ◽  
Unit Cell Dimensions

Plastic crystals, such as neopentylglycol, 2, 2-dimethyl-1,3-propanediol, that exhibit polymorphic behavior are emerging materials for thermal energy storage. The energy is stored isothermally in the γ phase, FCC, during solid-state phase transformations. This γ phase of NPG has been determined as an orientational disordered phase. The low temperature α phase structure, which is of great significance in the evaluation of lattice expansions and other parameters, was first determined in 1961. However, the reported unit cell dimensions and the intensities of the reflections led to erroneous indexing of the powder patterns in binary systems. The α phase structure is redetermined here as monoclinic, M= 104.15 amu, space group P21/n (an alternate setting of , space group No. 14), a = 5.979(1)Å, b= 10.876(2)Å, c=10.099(2)Å, β=99.78(1)°, V=647.2(2)Å3 at 20°(± 1)C, Dx= 1.069 g cm s−3 for Z=4. In this paper the redetermined structure of the α phase of NPG is presented in projections of the atomic positions, in tables, and in calculated powder pattern and these results are compared with those reported by others. The powder patterns obtained from the Bragg–Brentano diffractometer are compared with our calculated pattern from the single crystal data. The structural parameters of the high temperature phase of NPG as determined by a Guinier diffraction system are also reported.

scholarly journals On the High Ionic Conductivity of Solid Solutions of Lithium Sulphate in Hexagonal Sodium Sulphate Na2SÒ4(I)

1995 ◽  
Vol 50 (4-5) ◽  
pp. 327-328 ◽  
Author(s):  
Arnold Lundén ◽  
Leif Nilsson
Keyword(s):  
High Temperature ◽  
Ionic Conductivity ◽  
Solid Solutions ◽  
High Temperature Phase ◽  
Sodium Sulphate ◽  
High Ionic Conductivity ◽  
Temperature Phase ◽  
Lithium Sulphate

Abstract Solid solutions of Li2SO4 in the high-temperature phase Na2SO4 (I) have a much higher conductivity than expected. Diffusion and electromigration experiments show that both Li+ and Na+ ions are very mobile. It is concluded that the Li+ ions go into interstitial positions of the type (1/2,0,0), while vacancies are created in the Na+ lattice

Structural Study of TlH2PO4 and TlD2PO4 in the High Temperature Phase

1995 ◽  
Vol 5 (7) ◽  
pp. 763-769 ◽  
Author(s):  
S. Rios ◽  
W. Paulus ◽  
A. Cousson ◽  
M. Quilichini ◽  
G. Heger ◽  
...  
Keyword(s):  
High Temperature ◽  
Structural Study ◽  
High Temperature Phase ◽  
Temperature Phase

LATTICE DYNAMICS CALCULATIONS FOR SOLID BIPHENYL IN THE HIGH TEMPERATURE PHASE

1981 ◽  
Vol 42 (C6) ◽  
pp. C6-599-C6-601 ◽  
Author(s):  
T. Wasiutynski ◽  
I. Natkaniec ◽  
A. I. Belushkin
Keyword(s):  
High Temperature ◽  
Lattice Dynamics ◽  
High Temperature Phase ◽  
Temperature Phase

High temperature phase transitions and proton conductivity in some kdp-family crystals

1989 ◽  
Vol 100 (1) ◽  
pp. 135-141 ◽  
Author(s):  
A. I. Baranov ◽  
V. P. Khiznichenko ◽  
L. A. Shuvalov
Keyword(s):  
Phase Transitions ◽  
High Temperature ◽  
Proton Conductivity ◽  
High Temperature Phase ◽  
Temperature Phase
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