Phase diagram and physical properties of the sodium niobate-lithium niobate-cadmium niobate three-component system

Авторами исследовано влияние температуры синтеза ниобата натрия, на состояние поляризации в образцах керамики чистого ниобата натрия и модифицированного литием. Проведено сравнительное исследование структуры и пироэлектрических свойств полученных образцов. Показано, что введение в качестве модификатора лития приводит к существенному изменению структуры в глубине образцов керамики на основе ниобата натрия. Если в глубине образцов чистого ни ниобата натрия, как и на поверхности, различаются отдельные зерна, то центральная часть керамики ниобата натрия-лития представляет собой сплошной массив, в котором отдельные зерна не наблюдаются. Во всех образцах, кроме чистого ниобата натрия, синтезированного двойным синтезом (первый при 650 °C, второй при 700 °C), установлено существование градиента поляризации по толщине образцов, направленного от стороны, соответствующей положительному концу вектора поляризации к стороне, соответствующей отрицательному концу вектора поляризации. The authors studied the effect of the temperature of sodium niobate synthesis on the state of polarization in ceramic samples of pure sodium niobate and modified with lithium. A comparative study of the structure and pyroelectric properties of the obtained samples has been carried out. It is shown that the introduction of lithium as a modifier leads to a significant change in the structure in the depth of ceramic samples based on sodium niobate. If in the depth of the pure sodium niobate samples, as well as on the surface, there are individual grains, then the central part of the sodium niobate-lithium niobate ceramics is a continuous mass in which individual grains are not observed. In all samples, except for pure sodium niobate, which was synthesized by double synthesis (the first at 650 °C, the second at 700 °C), the existence of a polarization gradient along the thickness of the samples was established. The gradient is directed from the side corresponding to the positive end of the polarization vector to the side corresponding to the negative end of the polarization vector.

Download Full-text

Calculation of physical properties of glass via the phase diagram approach

Journal of Non-Crystalline Solids ◽

10.1016/j.jnoncrysol.2016.11.005 ◽

2017 ◽

Vol 457 ◽

pp. 36-43 ◽

Cited By ~ 7

Author(s):

Q.Y. Zhang ◽

W.J. Zhang ◽

W.C. Wang ◽

Z.H. Jiang

Keyword(s):

Phase Diagram ◽

Physical Properties ◽

Diagram Approach

Download Full-text

Multiple Superconducting Phases in UTe2: A Complex Analogy to Superfluid Phases of 3He

10.7566/jpsht.1.005 ◽

2021 ◽

Vol 1 ◽

Author(s):

Shinsaku Kambe ◽

Keyword(s):

Phase Diagram ◽

Physical Properties ◽

Low Temperatures ◽

Quantum Statistics ◽

Superconducting Phases ◽

Fermion Systems ◽

Quantum Liquids ◽

Wave Symmetry ◽

Ferromagnetic Interactions ◽

Ordered State

In quantum liquids, large differences are observed owing to differences in quantum statistics. The physical properties of liquid 3He (Fermion) and 4He (Boson) are considerably different at low temperatures. After the discovery of superconductivity in electron (i.e., Fermion) systems, a similar pairing ordered state was expected for 3He. Remarkably, the observed ordered state of 3He was more surprising than expected, multiple superfluid phases in the T-P phase diagram. The origin of the multiple phases was attributed to ferromagnetic interactions in the p-wave symmetry state.

Download Full-text

Ground-state structures, physical properties and phase diagram of carbon-rich nitride C5N

Journal of Physics Condensed Matter ◽

10.1088/1361-648x/aada2c ◽

2018 ◽

Vol 30 (38) ◽

pp. 385402 ◽

Cited By ~ 1

Author(s):

Qinghua Wu ◽

Qianku Hu ◽

Yiming Hou ◽

Haiyan Wang ◽

Aiguo Zhou ◽

...

Keyword(s):

Phase Diagram ◽

Physical Properties ◽

Ground State ◽

Ground State Structures

Download Full-text

THERMODYNAMIC-TOPOLOGICAL ANALYSIS OF THE PHASE DIAGRAM STRUCTURE OF A FIVE-COMPONENT SYSTEM AND SEPARATION SCHEME SYNTHESIS FOR A MIXTURE OF ORGANIC PRODUCTS

Chemistry and Technology of Organic Substances ◽

10.54468/25876724_2020_4_15 ◽

2020 ◽

pp. 15-23

Author(s):

Anastasia V. Frolkova ◽

Elena A. Okhlopkova ◽

Alla K. Frolkova

Keyword(s):

Phase Diagram ◽

Topological Analysis ◽

Separation Scheme ◽

Component System ◽

Organic Products ◽

Thermodynamic Topological Analysis

Download Full-text

Electron-Doped Superconductivity in CuO2 Layered Compounds with Nd2CuO4− structure

MRS Proceedings ◽

10.1557/proc-156-389 ◽

1989 ◽

Vol 156 ◽

Cited By ~ 1

Author(s):

H. Takagi ◽

T. Ito ◽

H. Matsubara ◽

H. Watabe ◽

T. Ido ◽

...

Keyword(s):

Phase Diagram ◽

Physical Properties ◽

Transport Coefficients ◽

Sharp Contrast ◽

Layered Compounds ◽

Hole Doping ◽

High Tc ◽

Electron Doping ◽

High Tc Cuprates ◽

Effect Of Doping

ABSTRACTWe have discovered 24 K-superconductivity in a family of compounds Ln2−xCexCuO4−y (Ln=Pr, Nd, Sm). Novel feature of the superconductivity in these family of compounds is that superconductivity is produced by electron-doping in sharp contrast with high-Tc cuprates discovered so far. The effect of doping on physical properties particularly the elecronic phase diagram and transport coefficients which indicate symmetry in many respects between electron- and hole- doping is described.

Download Full-text

Thermal and physical properties of sodium niobate ceramics over a wide temperature range

Physics of the Solid State ◽

10.1134/s1063783413040045 ◽

2013 ◽

Vol 55 (4) ◽

pp. 821-828 ◽

Cited By ~ 11

Author(s):

V. S. Bondarev ◽

A. V. Kartashev ◽

M. V. Gorev ◽

I. N. Flerov ◽

E. I. Pogorel’tsev ◽

...

Keyword(s):

Physical Properties ◽

Wide Temperature Range ◽

Sodium Niobate ◽

Temperature Range

Download Full-text

Geometric Relation of Equilibrium Phase in Multi-Component System Phase Diagram

Contributed Papers from MS&T17 ◽

10.7449/2017mst/2017/mst_2017_1339_1345 ◽

2017 ◽

Author(s):

C. Liu ◽

J. Qiu ◽

L. Sun ◽

M. Jiang

Keyword(s):

Phase Diagram ◽

Equilibrium Phase ◽

Component System ◽

Geometric Relation ◽

System Phase Diagram ◽

Multi Component System ◽

System Phase

Download Full-text

Deformation of C15 Laves Phase Alloys

MRS Proceedings ◽

10.1557/proc-364-1197 ◽

1994 ◽

Vol 364 ◽

Cited By ~ 5

Author(s):

F. Chu ◽

D.P Pope

Keyword(s):

Phase Diagram ◽

Physical Properties ◽

Mechanical Behavior ◽

Laves Phase ◽

Deformation Mechanisms ◽

Laves Phases ◽

Theoretical Approaches

AbstractDetails of the structure and previous work on the deformation of C15 Laves phases are reviewed. The phase diagram of the Hf-V-Nb system, some metallurgical and physical properties, mechanical behavior, and the deformation mechanisms of HfV2+Nb (C15 HfV2+Nb and V-rich bcc solution) are presented based on our previous work. Theoretical approaches to understanding the results of these studies are discussed.

Download Full-text