New data on temperature stability and acoustical losses of langasite crystals

Sakharov, S.; Senushencov, P.A.; Medvedev, A. V.; Pisarevsky, Yu. V.

doi:10.1109/freq.1995.484067

Cited by 63 publications

(15 citation statements)

References 1 publication

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“…54,69 ' 90 More recent results for Y+45°, Y+50°, and Y+55° rotated Y-cuts confirm the good room temperature agreement using material constants from Sakharov. 57 These results also obtain a reasonable agreement between temperature behavior calculated using the earlier temperature coefficients from Silvestrova 54 and the measurements. 91 Similar good agreement was shown by Inoue between calculations of room temperature behavior using material constants from Sakharov 57 and experimental data for SAW propagation on Xcut, Y-cut, and 50° rotated Y-cut langasite, 92 also with poor agreement for the temperature behavior.…”

Section: "Best" Materials Constants For Langasitesupporting

confidence: 81%

New Piezoelectric Substrates for Saw Devices

Kosinski

2000

Int. J. Hi. Spe. Ele. Syst.

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Recent developments in single crystal piezoelectric materials have focused on the search for "ideal" materials with zero temperature coefficient of frequency orientations featuring jointly high piezoelectric coupling, high intrinsic Q, zero power flow angle, and minimized diffraction effects. In addition, the desired materials should have no low temperature phase transitions, and a physical chemistry conducive to repeatable, low cost growth and wafer scale device production. As difficult as it might seem to find such "ideal" materials, three completely different but strong candidate materials have emerged recently: the quartz homeotype gallium orthophosphate, the quartz isotype calcium gallogermanates (langasite, langanite, langatate, etc.), and diomignite (lithium tetraborate). The current state-of-the-art and prospects for future development of these materials are considered.

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Section: "Best" Materials Constants For Langasitesupporting

confidence: 81%

New Piezoelectric Substrates for Saw Devices

Kosinski

2000

Int. J. Hi. Spe. Ele. Syst.

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“…In this work, we chose to focus on those provided by Sakharov [3], Malocha [4] and Bungo [5]. Using the LGS constants and associated temperature coefficients, new LGS constants are calculated for different temperatures.…”

Section: Comparison Between Experimental Results and Simulationsmentioning

confidence: 99%

Langasite Based Surface Acoustic Wave Sensors for High Temperature Chemical Detection in Harsh Environment

et al. 2009

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This work presents a stand-alone portable device for high temperature assessment. The system includes a Langasite (LGS) acoustic sensor, a ceramic heater and a platform with RF connections for remote in-situ measurements. The packaging consists in a hermetic stainless steel cell which enables safe gas detection. In situ temperature measurements have been achieved thanks to the integrated heater and have been compared with finite element modeling. The thermal behavior was successfully investigated in the temperature range 25-450°C. The resulting experimental data have been compared with different theoretical models, using several sets of LGS constants, and their agreement is discussed.

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“…The piezoelectric coupling factors of Y-cut langasite were also calculated using the material constants of Sakharov et al [14]. The results are plotted in Fig.3.…”

Section: A Piezoelectric Coupling Factormentioning

confidence: 99%

Electrical Sensoring Characteristics of Pseudo-LFE Sensors with Different Single Crystals

Zhang

Wang

et al. 2013

2013 IEEE International Conference on Green Computing and Communications and IEEE Internet of Things and IEEE Cyber, Physical A

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In the present study, three pseudo-LFE devices made of (yxl)21.82° LiNbO 3 , Y-cut LiTaO 3 and Y-cut langasite were investigated and compared. The coupling factors and phase velocities of all devices were calculated for device design. The sensitivity of these three devices to the electrical property changes of liquid were tested in isopropanol-water and NaClwater solution. The results shown that (yxl)21.82° LiNbO 3 device is more sensitive to the change of liquid conductivity and Y-cut LiTaO 3 device is more sensitive to the change of liquid permittivity. For the design of polymer coated gas sensors, the choose of pseudo-LFE device determines by the characteristics of conductive-polymer.

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New data on temperature stability and acoustical losses of langasite crystals

Cited by 63 publications

References 1 publication

New Piezoelectric Substrates for Saw Devices

New Piezoelectric Substrates for Saw Devices

Langasite Based Surface Acoustic Wave Sensors for High Temperature Chemical Detection in Harsh Environment

Electrical Sensoring Characteristics of Pseudo-LFE Sensors with Different Single Crystals

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