Influence of trace zirconia addition on the properties of (K,Na)NbO3solid solutions

2019 ◽  
Vol 7 (23) ◽  
pp. 6914-6923 ◽  
Author(s):  
Yi-Xuan Liu ◽  
Hao-Cheng Thong ◽  
Chunlin Zhao ◽  
Qing Liu ◽  
Xingyu Xu ◽  
...  
Keyword(s):  
Solid Solutions ◽  
The Relationship ◽  
Zirconia Addition

The missing understanding of the relationship between the properties and trace zirconia addition in KNN solid solutions is obtained.

scholarly journals Relationship between tolerance factor and temperature coefficient of permittivity of temperature-stable high permittivity BaTiO3–Bi(Me)O3 compounds

2016 ◽  
Vol 06 (01) ◽  
pp. 1650002 ◽  
Author(s):  
Natthaphon Raengthon ◽  
Connor McCue ◽  
David P. Cann
Keyword(s):  
Temperature Coefficient ◽  
Solid Solutions ◽  
Temperature Stability ◽  
Past Research ◽  
Tolerance Factor ◽  
Microwave Dielectrics ◽  
High Permittivity ◽  
The Relationship

The temperature coefficient of permittivity ([Formula: see text]) of BaTiO3–Bi(Me)O3 solid solutions were investigated. It was determined that as the tolerance factor was decreased with the addition of Bi(Me)O3, the [Formula: see text] shifted from large negative values to [Formula: see text] values approaching zero. It is proposed that the different bonding nature of the dopant cation affects the magnitude and temperature stability of the permittivity. This study suggests that the relationship between tolerance factor and [Formula: see text] can be used as a guide to design new dielectric compounds exhibiting temperature-stable high permittivity characteristics, which is similar to past research on perovskite and pyrochlore-based microwave dielectrics.

Chemical bonding characteristics and dielectric properties of Nd2(Ba1−xSrx)ZnO5 solid solutions

2003 ◽  
Vol 18 (10) ◽  
pp. 2427-2434 ◽  
Author(s):  
Akinori Kan ◽  
Hirotaka Ogawa ◽  
Kenkichi Mori ◽  
Hitoshi Ohsato ◽  
Yoshinori Andou
Keyword(s):  
Crystal Structure ◽  
Dielectric Properties ◽  
Dielectric Property ◽  
Solid Solutions ◽  
Dielectric Constants ◽  
First Principle ◽  
Quality Factors ◽  
Microwave Dielectric ◽  
The Relationship ◽  
Bonding Characteristics

The relationship between the microwave dielectric property and crystal structure of Nd2(Ba1−xSrx)ZnO5 solid solutions was investigated using bond valence theorem and first principle method (DV-Xα method). The evaluation of the covalence characteristics of cation–oxygen bonds revealed that as the x value increased, the covalence characteristics of the M–O (M = Ba and Sr) bonds in the MO10 polyhedron decreased while those of the Zn–O(2) bonds in the ZnO4 tetrahedron increased. From the DV-Xα method, it was found that the 3d electrons of the Zn2+ ion are closely related to the strong covalence characteristics of the Zn–O(2) bonds. The dielectric constants were approximately constant over the whole composition; this result is considered to relate to the decrease in the covalence characteristic of the M–O bonds. The quality factors increased from 4915 to 25,836 GHz, and the grain growth of the solid solutions are considered to improve the Q × f values.

Order–disorder of oxygen anions and vacancies in solid solutions of La2TiO5 and La4Ga2O9

2009 ◽  
Vol 65 (5) ◽  
pp. 558-566 ◽  
Author(s):  
Marta Kasunič ◽  
Anton Meden ◽  
Srečo D. Škapin ◽  
Danilo Suvorov ◽  
Amalija Golobič
Keyword(s):  
Solid Solutions ◽  
Solid Solubility ◽  
Oxygen Vacancies ◽  
Rietveld Refinements ◽  
Space Group ◽  
Group Change ◽  
Oxygen Anions ◽  
The Relationship

Successful Rietveld refinements of seven compounds with the formulae La2Ti(1−x)Ga x O(5−x/2), where x = 0.00, 0.20, 0.50, 0.70, 0.90, 0.95 and 1.00, were performed in order to describe the solid solubility between orthorhombic (Pnam) La2TiO5 and monoclinic (P21/c) La4Ga2O9. The relationship between the end-member structures, which are already known, is discussed; the space-group change is a consequence of ordering the oxygen vacancies that become more numerous as Ga is substituted for Ti. The structures of the solid solutions are also described. The lengths of cell edges obey Vegard's rule.

Preliminary Evaluation of Thermodynamic Mixing Properties and Miscibility Limits for Cubic Dioxide (Zr, M)O2 and Zircon (Zr, M)SiO4 Solid Solutions (M = An4+, Ln4+)

1997 ◽  
Vol 506 ◽  
Author(s):  
V.A. Kurepin
Keyword(s):  
Solid Solution ◽  
Solid Solutions ◽  
Enthalpy Of Mixing ◽  
Thermodynamic Theory ◽  
Preliminary Evaluation ◽  
Interatomic Distances ◽  
Mixing Properties ◽  
Equilibrium Data ◽  
End Members ◽  
The Relationship

Cubic zirconia ZrO2 and zircon ZrSiO4 are considered as perspective crystalline form for immobilization of U, Pu and other radionuclides [1, 2]. The present study was undertaken to determine temperature dependence of solid solution limits in these compounds using thermodynamic theory of solid solutions and available equilibrium data. Thermodynamic mixing properties has been evaluated by means of the relationship between Margules parameter W and interatomic distances R in end-members AX and BX of a solid solution (A1−xBx)XW = α(ΔR/R)2where ΔR = R(BX) - R(AX), R = (1−x) R(AX) + x R(BX), α is a constant for isotypic isostructural compounds. According to the Urusov's energetic theory of enthalpy of mixing [3] such relationships exist between parameters W, AR and R of solid solutions with similar bonds between isomorphous atoms and their neighbors

Oxygen storage capacity versus catalytic activity of ceria–zirconia solid solutions in CO and HCl oxidation

2019 ◽  
Vol 9 (9) ◽  
pp. 2163-2172 ◽  
Author(s):  
Yu Sun ◽  
Chenwei Li ◽  
Igor Djerdj ◽  
Omeir Khalid ◽  
Pascal Cop ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Solid Solutions ◽  
Storage Capacity ◽  
Oxygen Storage Capacity ◽  
Oxygen Storage ◽  
Oxidation Reactions ◽  
The Relationship

CexZr1−xO2 solid solutions were prepared to explore the relationship between oxygen storage capacity and activity of oxidation reactions.

Mössbauer Spectroscopy and Magnetoelectric Effect Studies of Multiferroic Ceramics Based on BiFeO3

2014 ◽  
Vol 602-603 ◽  
pp. 936-941 ◽  
Author(s):  
Elzbieta Jartych ◽  
Tomasz Pikula ◽  
Karol Kowal ◽  
Agata Lisińska-Czekaj ◽  
Dionizy Czekaj
Keyword(s):  
Magnetic Properties ◽  
Solid Solutions ◽  
Magnetoelectric Effect ◽  
Hyperfine Interactions ◽  
X Ray Diffraction ◽  
Voltage Coefficient ◽  
Properties Of Materials ◽  
First Time ◽  
The Relationship ◽  
Sintering Method

In this work the results of investigations for (BiFeO3)x(BaTiO3)1-xand Bi1-xNdxFeO3solid solutions are described. Samples were prepared by the conventional solid-state sintering method. X-ray diffraction,57Fe Mössbauer spectroscopy, and magnetoelectric effect measurements were applied as complementary methods to determine the structure and magnetic properties of materials. For (BiFeO3)x(BaTiO3)1-xsolid solutions Mössbauer spectroscopy revealed the relationship between the content of BiFeO3and the magnetic properties of the samples. Moreover, the presence of magnetoelectric coupling in (BiFeO3)x(BaTiO3)1-xsolid solutions was registered at room temperature for the materials sintered at various temperatures. The maximum value of magnetoelectric voltage coefficient was achieved for 0.7(BiFeO3)0.3(BaTiO3) sintered at 1153K. Structure of Bi1-xNdxFeO3solid solutions was investigated in the whole range of concentration. Hyperfine interactions parameters were determined for the first time for these solid solutions.

THE LATTICE SPACINGS OF NICKEL SOLID SOLUTIONS

1957 ◽  
Vol 35 (4) ◽  
pp. 349-357 ◽  
Author(s):  
W. B. Pearson ◽  
L. T. Thompson
Keyword(s):  
Solid Solutions ◽  
Lattice Spacing ◽  
Lattice Distortion ◽  
Solidus Temperature ◽  
Long Period ◽  
Relationship Of ◽  
The Relationship

New lattice spacing measurements in terminal nickel solid solutions with Cr, Mn, Co, Zn, Ga, Ge, In, and Sn solutes are reported and discussed, and the relationship of lattice distortion and the depression of the solidus temperature is examined in solid solutions of the First Long Period elements in nickel.

Understanding the relationship between the local crystal structure and the ferrimagnetic ordering of CoxMn3-xO4 (x = 0–0.5) solid solutions

2021 ◽  
Vol 853 ◽  
pp. 157256
Author(s):  
Narayanan Kutty Rajeesh Kumar ◽  
Leonid Vasylechko ◽  
Shailja Sharma ◽  
Chandra S. Yadav ◽  
Ramakrishnan Kalai Selvan
Keyword(s):  
Crystal Structure ◽  
Solid Solutions ◽  
The Relationship ◽  
Local Crystal Structure ◽  
Ferrimagnetic Ordering
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