Growing the large lanthanum gallium silicate single crystals by Czochralski method

Dorogovin, B.A.; Stepanov, S.Yu.; Doubovski, A.B.; Tsegleev, A.A.; Lapteva, G.A.; Kurochkin, V.Y.; Philippov, I.M.

doi:10.1109/freq.2000.887347

Cited by 2 publications

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“…Temperature effects for the 1st torsional mode of a cylinder are computed according to equation (3). All crystals are expected to have temperature-compensated cuts for singly-rotated cuts and the results are summarised in Table 4.…”

Section: Temperature-compensated Cuts: Torsional (Cylinder)mentioning

confidence: 99%

“…Since the last 20 years, new piezoelectric materials have been developed, among them, Gallium orthophosphate (GaPO 4 ) [1] and the Langasite family (Lanthanum Gallium Silicate La 2 Ga 5 SiO 14 LGS [2], Lanthanum gallium tantalate, La 3 Ga 5.5 Ta 0.5 O 14 LGT [3])h a v e been studied in detail for high-performance piezoelectric resonator applications. The reasons of this interest are the material is now available commercially in crystal sizes compatible with production machines used in the industry; GaPO 4 , LGS and LGT can be used at high temperatures without loosing their piezoelectric properties; GaPO 4 , LGS and LGT exhibit temperature-compensated cuts for various modes of vibration: bulk waves, surface waves, vibrating beams and cylinders.…”

Section: Introductionmentioning

confidence: 99%

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A comparison of vibrating beam resonators in Quartz, GaPO4, LGS and LGT

Douchet¹,

Sthal²,

Bigler³

et al. 2010

Solid State Sciences

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The present paper reviews and compares the properties of vibrating beam resonators in length-extensional, flexural and cylindrical-torsional modes; resonators are designed and built with new piezoelectric materials: Gallium orthophosphate (GaPO 4 ), Langasite (LGS) and Langatate (LGT). Their characteristics are compared with the results obtained with the same structures built in classical Quartz crystal.For all 3 new crystals, temperature-compensated cuts have been found for length-extensional and flexural modes by a theoretical analysis. Experiments have been made on test beams fabricated by conventional precision lapping/machining and photolithography to deposit electrodes. The existence of temperature-compensated cuts for length-extensional resonators is experimentally confirmed.The possibilities of using temperature-compensated cylindrical resonators in the torsional modes are analysed and their temperature sensitivity is computed.

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Section: Temperature-compensated Cuts: Torsional (Cylinder)mentioning

confidence: 99%