Growth of Near-Stoichiometric Lithium Tantalate and its Periodical Polarization

Baoshen, 贾宝申 Jia; Yequan, 赵业权 Zhao

doi:10.3788/aos20103011.3249

Cited by 2 publications

(2 citation statements)

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“…At present, the main methods for preparing NSLT crystals are double crucible Czochralski method (DCCZ) [31], K 2 O cosolvent method [32] and vapor transport equilibrium (VTE) method [33]. The VTE method can grow various components of LT crystals [34].…”

Section: Crystal Preparation Methodsmentioning

confidence: 99%

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Preparation, Properties, and Applications of Near Stoichiometric Lithium Tantalate Crystals

Xiao

Liang

et al. 2023

Crystals

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Lithium tantalate crystal is widely used in optical devices, infrared detectors and surface acoustic wave devices because of its excellent piezoelectric, acousto-optic and nonlinear optical properties. The Li content of near stoichiometric lithium tantalate (NSLT) crystal is higher than that of congruent lithium tantalate (CLT) crystal. Therefore, the performance of NSLT crystal is better than that of CLT crystal in some aspects. This article reviews the physical properties, preparation methods and current research status in acoustics and optics of NSLT crystals. It also looks forward to the improvement of NSLT crystal preparation methods and their applications in surface acoustic wave (SAW) filters and optics. With the increase of Li content, the acoustic performance of NSLT crystals is expected to be comprehensively improved, achieving the application of SAW filters in 5G communication.

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Section: Crystal Preparation Methodsmentioning

confidence: 99%

“…The specific steps are to produce LT polycrystalline powder using high-purity H 2 TaF 7 and Li 2 CO 3 through multiple processes, and then, convert it into LT crystal. Jia [32] and others prepared NSLT crystal by adding K 2 O cosolvent. The crystal is shown in Figure 8.…”

Section: Cosolvent Methodsmentioning

confidence: 99%

Preparation, Properties, and Applications of Near Stoichiometric Lithium Tantalate Crystals

Xiao

Liang

et al. 2023

Crystals

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Study on the Fabrication and Acoustic Properties of Near-Stoichiometric Lithium Tantalate Crystal Surface Acoustic Wave Filters

Si,

Xiao,

Huang

et al. 2024

Crystals

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Near-stoichiometric lithium tantalate (NSLT) wafers with different Li contents were prepared by vapour transfer equilibrium (VTE) method and fabricated into surface acoustic wave filters. The temperature coefficient of frequency, insertion loss, and bandwidth of the surface acoustic wave filters were tested using a special chip test bench and a network analyzer. The results show that the temperature coefficient of frequency shows a trend of first decreasing and then increasing with the increase in Li content, and the temperature stability of the surface acoustic wave filters is best when the Li content is 49.75%. It is also found that the surface acoustic wave filter fabricated from NSLT wafers has 21.18% lower temperature coefficient of frequency, 7.3% lower insertion loss, and 2.8% lower bandwidth than those fabricated from congruent lithium tantalate wafers. Therefore, NSLT crystals are more suitable for applications in acoustic devices, providing a new idea for performance enhancement of 5G communication devices.

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Growth of Near-Stoichiometric Lithium Tantalate and its Periodical Polarization

Cited by 2 publications

References 0 publications

Preparation, Properties, and Applications of Near Stoichiometric Lithium Tantalate Crystals

Preparation, Properties, and Applications of Near Stoichiometric Lithium Tantalate Crystals

Study on the Fabrication and Acoustic Properties of Near-Stoichiometric Lithium Tantalate Crystal Surface Acoustic Wave Filters

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