scholarly journals COMPARATIVE ANALYSIS OF THE PROPERTIES OF SODIUM NIOBATE AND SODIUM - LITHIUM NIOBATE CERAMICS

2021 ◽  
pp. 278-285
Author(s):  
Ольга Витальевна Малышкина ◽  
Кирилл Валерьевич Пацуев ◽  
Александра Ивановна Иванова ◽  
Майс Али
Keyword(s):  
Comparative Analysis ◽  
Lithium Niobate ◽  
Polarization Vector ◽  
Sodium Niobate ◽  
Ceramic Samples ◽  
State Of Polarization ◽  
Continuous Mass ◽  
Polarization Gradient ◽  
Individual Grains ◽  
Niobate Lithium

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.

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

2001 ◽  
Vol 46 (1) ◽  
pp. 24-28
Author(s):  
L. A. Reznichenko ◽  
O. N. Razumovskaya ◽  
L. A. Shilkina ◽  
A. Ya. Dantsiger ◽  
S. I. Dudkina ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Lithium Niobate ◽  
Physical Properties ◽  
Sodium Niobate ◽  
Component System ◽  
Niobate Lithium

Ferroelectric elastance of sodium niobate-lithium niobate solid solutions in relation to A-O bond covalence

2000 ◽  
Vol 45 (11) ◽  
pp. 1437-1440 ◽  
Author(s):  
L. A. Reznichenko ◽  
A. Ya. Dantsiger ◽  
O. N. Razumovskaya ◽  
S. I. Dudkina ◽  
L. A. Shilkina ◽  
...  
Keyword(s):  
Lithium Niobate ◽  
Solid Solutions ◽  
Sodium Niobate ◽  
Niobate Lithium

scholarly journals Effect of local PMD and PDL directional correlation on the principal state of polarization vector autocorrelation

2003 ◽  
Vol 11 (23) ◽  
pp. 3141 ◽  
Author(s):  
Liang Chen ◽  
Saeed Hadjifaradji ◽  
David Waddy ◽  
Xiaoyi Bao
Keyword(s):  
Polarization Vector ◽  
State Of Polarization

scholarly journals Microstructure and properties of the mullite‒ZrO2(Y2O3)‒Si3N4-composite ceramics sintered in different ways

2018 ◽  
pp. 49-54
Author(s):  
G. Sedmale ◽  
L. Grasse ◽  
I. Zalite ◽  
N. Zhilinska ◽  
Ya. Rodriges
Keyword(s):  
Phase Composition ◽  
Comparative Analysis ◽  
Conventional Method ◽  
Elasticity Modulus ◽  
Defect Formation ◽  
Strength Properties ◽  
Composite Ceramics ◽  
Ceramic Samples ◽  
Spark Plasma ◽  
Plasma Methods

The research objective was to investigate the packing degree, phase composition, microstructure and some other properties of the mullite‒ZrO2composite ceramics with the Si3N4addition sintered in different ways, such as: by the conventional method, by the spark-plasma method, and both in the microwave and solar ovens. The comparative analysis was carried out for the strength properties (these were the ultimate compressing strength and the elasticity modulus) for the ceramic samples which had been sintered by means of the conventional and of the spark-plasma methods. Some reasons for the defect formation in the samples after their sintering in the microwave and solar ovens were mentioned.Ill.8. Ref. 10. Tab. 2.

scholarly journals Особенности поляризации пьезоэлектрической керамики на основе ниобата натрия

2021 ◽  
Vol 63 (11) ◽  
pp. 1890
Author(s):  
О.В. Малышкина ◽  
М. Али ◽  
А.И. Иванова ◽  
И.А. Чернышова ◽  
Д.В. Мамаев
Keyword(s):  
Ferroelectric Properties ◽  
Structural Features ◽  
Potassium Niobate ◽  
Sodium Niobate ◽  
Chemical Formula ◽  
Sodium Potassium ◽  
X Ray ◽  
Sodium Potassium Niobate ◽  
Ceramic Samples ◽  
Additional Phase

Comparative studies of the pyroelectric properties and structural features of sodium niobate and sodium-potassium niobate ceramics obtained under different technological conditions for the synthesis of sodium niobate have been carried out. X-ray phase analysis revealed the existence of an additional phase with the chemical formula NaNb10O18 in sodium niobate ceramic samples that do not exhibit ferroelectric properties. It is shown that the temperature conditions for the synthesis of the sodium niobate material determine the nature of the macroscopic polarization of the samples of both pure sodium niobate and sodium-potassium niobate.

scholarly journals EFFECT OF THE SYNTHESIS TEMPERATURE ON THE STRUCTURE OF SODIUM-LITHIUM NIOBATE CERAMICS

2020 ◽  
pp. 644-651
Author(s):  
Ольга Витальевна Малышкина ◽  
Кирилл Валерьевич Пацуев ◽  
Александра Ивановна Иванова
Keyword(s):  
Phase Transition ◽  
Dielectric Properties ◽  
Lithium Niobate ◽  
Comparative Study ◽  
Piezoelectric Ceramics ◽  
Synthesis Temperature ◽  
Sodium Niobate ◽  
Significant Dependence ◽  
Grain Formation

Авторами получены образцы и проведено исследование структуры и диэлектрических свойств пьезоэлектрической керамики на основе ниобатов натрия и лития (LiNa) NbO при различных технологиях синтеза материала ниобата натрия. Проведено сравнительное исследование структуры и диэлектрических свойств полученных образцов. Показана существенная зависимость зернообразования в процессе спекания образцов от температуры синтеза состава NaNbO. Установлено, что температура фазового перехода сильно зависит от температуры первого синтеза ниобата натрия (первый синтез при температуре 650 °С - T ~ 375 °С, при температуре первый синтез 700 °С - Т = 425 °С). The authors synthesized samples and studied the structure of piezoelectric ceramics based on sodium and lithium niobates (LiNa)NbO with various technologies for the synthesis of sodium niobate material. A comparative study of the structure and dielectric properties of the obtained samples was carried out. A significant dependence of grain formation during sintering of the samples on the synthesis temperature of the NaNbO composition is shown. It was found that the temperature of the phase transition strongly depends on the temperature of the first synthesis of the sodium niobate (T ~ 375 °С if the first synthesis temperature was 650 °С; T=425 °С if the first synthesis temperature is 700 °С).

Sign in / Sign up

Export Citation Format

Share Document