Thallium selenide (TlSe) crystal structure, lattice parameter, thermal expansion

2005 ◽  
pp. 1-2
Author(s):  
Keyword(s):  
Crystal Structure ◽  
Thermal Expansion ◽  
Lattice Parameter ◽  
Thallium Selenide

CRYSTAL STRUCTURE, ELECTRICAL CONDUCTIVITY AND THERMAL EXPANSION OF Pr1-xSrxFeO3-δ(0 ≤ x ≤ 0.6)

2012 ◽  
Vol 26 (32) ◽  
pp. 1250174 ◽  
Author(s):  
V. PRASHANTH KUMAR ◽  
Y. S. REDDY ◽  
P. KISTAIAH ◽  
C. VISHNUVARDHAN REDDY
Keyword(s):  
Crystal Structure ◽  
Electrical Conductivity ◽  
Thermal Expansion ◽  
Room Temperature ◽  
Small Polaron ◽  
Linear Thermal Expansion ◽  
Lattice Parameter ◽  
Polaron Hopping ◽  
X Ray ◽  
Perovskite Type

The crystal structure at room temperature (RT), thermal expansion from RT to 1000°C and electrical conductivity, from RT to 600°C, of the perovskite-type oxides in the system Pr 1-x Sr x FeO 3(x = 0, 0.2, 0.4, 0.6) were studied. All the compounds have the orthorhombic perovskite GdFeO 3-type structure with space group Pbnm. The lattice parameters were determined by X-ray powder diffraction. The Pseudo cubic lattice parameter decreases with an increase in x, while the coefficient of linear thermal expansion increases. The thermal expansion is almost linear for x = 0 and 0.2. The electrical conductivity increases with increasing x while the activation energy decreases. The electrical conductivity can be described by the small polaron hopping conductivity model.

Crystal structure, thermal expansion and fluorescence of Sr3–1.5Eu B2+Si1–O8–/2 phosphors

2021 ◽  
Vol 260 ◽  
pp. 124151
Author(s):  
Maria G. Krzhizhanovskaya ◽  
Sergey N. Volkov ◽  
Alexey V. Povolotskiy ◽  
Rimma S. Bubnova ◽  
Olga L. Belousova ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Thermal Expansion

ChemInform Abstract: Magnetization, Crystal Structure and Anisotropic Thermal Expansion of Single-Crystal SrEr2O4.

ChemInform ◽  
2015 ◽  
Vol 46 (10) ◽  
pp. no-no
Author(s):  
Hai-Feng Li ◽  
Andrew Wildes ◽  
Binyang Hou ◽  
Cong Zhang ◽  
Berthold Schmitz ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Thermal Expansion ◽  
Single Crystal ◽  
Anisotropic Thermal Expansion

Influence of Excess Bi2O3 and Na2Co3 on Crystal Structure and Microstructure of Bismuth Sodium Titanate Ceramics

2011 ◽  
Vol 474-476 ◽  
pp. 1711-1714 ◽  
Author(s):  
Panadda Sittiketkron ◽  
Arrak Klinbumrung ◽  
Theerachai Bongkarn
Keyword(s):  
Crystal Structure ◽  
Dielectric Properties ◽  
Perovskite Phase ◽  
Average Particle Size ◽  
Sodium Titanate ◽  
Solid State Reaction Method ◽  
Lattice Parameter ◽  
Rhombohedral Structure ◽  
Average Particle ◽  
Average Grain Size

This study investigated the influence of excess Bi2O3 and Na2CO3 on the crystal structure, microstructure and dielectric properties of (Bi0.5Na0.5)TiO3 (BNT) ceramics. The BNT ceramics were synthesized using the solid-state reaction method with various excess Bi2O3 and Na2CO3 levels (0, 1, 2, 3 and 4 mol%). The X-ray characterization revealed that all samples had a rhombohedral structure. A pure perovskite phase was obtained in all samples. The lattice parameter a tended to increase with increased excess Bi2O3 and Na2CO3 content in the calcined powders and sintered ceramics. The average particle size increased while, the average grain size tended to decreased with increased of excess Bi2O3 and Na2CO3 content. The depolarization temperature (Td) and the Curie temperature (Tc) were slightly decreased with the increase of excess Bi2O3 and Na2CO3 content. The dielectric properties were related to the density.

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