Advanced piezoelectric crystal Ca&lt;inf&gt;3&lt;/inf&gt;TaGa&lt;inf&gt;3&lt;/inf&gt;Si&lt;inf&gt;2&lt;/inf&gt;O&lt;inf&gt;14&lt;/inf&gt;: Growth, crystal structure perfection, piezoelectric and acoustic properties

Рощупкин, Д. В.; Иржак, Д. В.; Емелин, Е. В.; Fahrtdinov, R. R.; Plotitsyna, O. A.; Sakharov, S.; Бузанов, О. А.; Zabelin, A.

doi:10.1109/ultsym.2012.0684

Cited by 2 publications

(2 citation statements)

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“…This relatively slow method uses function R only as a function of material constants, without additional calculation of its gradient as in the fast gradient methods. In the end the gradient is tending to zero near a minimum of function (1). This can lead to difficulties in the final stage of calculations.…”

Section: Measured and Calculated Saw Velocitesmentioning

confidence: 99%

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CTGS material parameters obtained by versatile SAW measurements

Biryukov

Schmidt

Сотников

et al. 2014

2014 IEEE International Ultrasonics Symposium

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Recently big size high quality piezoelectric single crystals of Ca3TaGa3Si2O14 (CTGS) have been grown. This temperature durable crystal is very promising for future application in different devices based on surface acoustic waves (SAW) due to its high electromechanical coupling compared to quartz. In contrast to the popular langasite, CTGS is a more ordered compound and therefore stands for better characteristics at both, high temperatures and high frequencies. During the last decade several sets of material constants for CTGS were published extracted from bulk acoustic wave measurements on small samples, but these results are strongly different from each other. Moreover, all published constant sets lead to unacceptable numerical differences for calculated SAW velocities when compared to recent measurements of SAW velocities on large CTGS wafers. In this work we present a new set of room temperature CTGS material constants, extracted by combination of high-precision SAW phase velocity measurements with proprietary numerical procedures developed in-house.

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Section: Measured and Calculated Saw Velocitesmentioning

confidence: 99%

“…High quality piezoelectric single crystals of Ca 3 TaGa 3 Si 2 O 14 (CTGS) in the form of boules up to length and diameter of 80 mm have been grown by JSC FomosMaterials using the Czochralski method [1]- [3]. The crystals have a melting point of about 1400°C without any phase transition below this temperature.…”

Section: Introductionmentioning

confidence: 99%