Hysteresis-free high-temperature precise bimorph actuators produced by direct bonding of lithium niobate wafers

2015 ◽  
Vol 106 (5) ◽  
pp. 053116 ◽  
Author(s):  
V. Ya. Shur ◽  
I. S. Baturin ◽  
E. A. Mingaliev ◽  
D. V. Zorikhin ◽  
A. R. Udalov ◽  
...  
Keyword(s):  
High Temperature ◽  
Lithium Niobate ◽  
Bimorph Actuators

Interdomain region in single-crystal lithium niobate bimorph actuators produced by light annealing

2015 ◽  
Vol 60 (5) ◽  
pp. 700-705 ◽  
Author(s):  
I. V. Kubasov ◽  
M. S. Timshina ◽  
D. A. Kiselev ◽  
M. D. Malinkovich ◽  
A. S. Bykov ◽  
...  
Keyword(s):  
Lithium Niobate ◽  
Single Crystal ◽  
Bimorph Actuators

scholarly journals Brazing Strategies for High Temperature Ultrasonic Transducers Based on LiNbO3 Piezoelectric Elements

Instruments ◽  
2018 ◽  
Vol 3 (1) ◽  
pp. 2 ◽  
Author(s):  
Christopher Bosyj ◽  
Neelesh Bhadwal ◽  
Thomas Coyle ◽  
Anthony Sinclair
Keyword(s):  
High Temperature ◽  
Lithium Niobate ◽  
Elevated Temperatures ◽  
Piezoelectric Element ◽  
Low Noise ◽  
Ultrasonic Transducers ◽  
Acoustic Coupling ◽  
Industrial Operations ◽  
Critical Components

Long-term installation of ultrasonic transducers in high temperature environments allows for continuous monitoring of critical components and processes without the need to halt industrial operations. Transducer designs based on the high-Curie-point piezoelectric material lithium niobate have been shown to both be effective and stable at extreme temperatures for long-term installation. In this study, several brazing techniques are evaluated, all of which aim to provide both mechanical bonding and acoustic coupling directly to a bare lithium niobate piezoelectric element. Two brazing materials—a novel silver-copper braze applied in a reactive air environment and an aluminum-based braze applied in a vacuum environment—are found to be suitable for ultrasound transmission at elevated temperatures. Reliable wide-bandwidth and low-noise ultrasound transmission is achieved between room temperature and 800 °C.

High temperature transport processes in lithium niobate

1969 ◽  
Vol 30 (12) ◽  
pp. 2639-2648 ◽  
Author(s):  
Paul J. Jorgensen ◽  
Robert W. Bartlett
Keyword(s):  
High Temperature ◽  
Lithium Niobate ◽  
Transport Processes

Coloring Changes of Congruent LiNbO3 Crystals under Redox Annealing

2015 ◽  
Vol 230 ◽  
pp. 228-232 ◽  
Author(s):  
Dmytro Yu. Sugak
Keyword(s):  
High Temperature ◽  
Lithium Niobate ◽  
Structural Properties ◽  
High Temperature Annealing ◽  
Lithium Niobate Crystals ◽  
Congruent Lithium Niobate

The paper is to discuss the main characteristics of the influence of high temperature annealing in different gas environments on the optical and structural properties of congruent lithium niobate crystals.

scholarly journals Properties of high-temperature poling ferroelectric crystals congruent solid solution LiNb0.5Ta0.5O3

2021 ◽  
Vol 24 (1) ◽  
pp. 34-39
Author(s):  
A. A. Mololkin ◽  
D. V. Roshchupkin ◽  
E. E. Emelin ◽  
R. R. Fahrtdinov
Keyword(s):  
Solid Solution ◽  
High Temperature ◽  
Lithium Niobate ◽  
Curie Temperature ◽  
Comparative Studies ◽  
Thermal Instability ◽  
Lithium Niobate Crystal ◽  
Czochralski Method ◽  
Lithium Tantalate ◽  
Piezoelectric Constants

Lithium niobate and lithium tantalate are among the most important and most widely used materials in acousto-optics and acoustoelectronics. These materials have high values of piezoelectric constants, which makes it possible to use these materials as actuators; however, their use is limited by the thermal instability of a lithium niobate crystal and the low Curie temperature (TC) of a lithium tantalate crystal. LiNb(1-x)TaxO3 crystals have to overcome the aforementioned limitations of individual compounds.Crystals LiNb0.5Ta0.5O3 were grown by the Czochralski method, of good quality. Comparative studies of the features of high-temperature single domainization of LiNb0.5Ta0.5O3 crystals have been carried out. The main differences in the technological regimes for single-domainization of congruent LiNb0.5Ta0.5O3 crystals from congruent LiNbO3 crystals are demonstrated. The parameters of high-temperature electrodiffusion processing LiNb0.5Ta0.5O3 crystals are presented, which make it possible to obtain single-domain crystals for further study of their physical properties.

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