Bridgman growth of large-aperture yttrium calcium oxyborate crystal

Wu, Anhua; Jiang, Linwen; Qian, Guoxing; Zheng, Yanqing; Xu, Jing; Shi, Er-Wei

doi:10.1016/j.materresbull.2012.04.116

Cited by 10 publications

(4 citation statements)

References 16 publications

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“…Growth was then driven by lowering the crucible at a rate of 0.2-0.6 mm/h, and the temperature gradient near the solid/liquid interface was normally kept at 30-50 °C/cm. Recently, large YCOB crystals with a diameter up to 3-4 inches have been reported, using the modified Bridgman furnace [48].…”

Section: Bridgman Methodsmentioning

confidence: 99%

“…[53]. Copyright 2006 Elsevier; Crystal (b) was grown using Bridgeman method, reprinted with permission from [48]. Copyright 2013 Elsevier; and crystals (c) were grown using Cz method, reprinted with permission from [46].…”

Section: Cz Pulling Methodsmentioning

confidence: 99%

“…Different techniques have been applied for ReCOB crystal growth, including the high temperature flux, Bridgman and Cz approaches [47][48][49]. At the early stage of ReCOB crystal studies, the high temperature flux method was adopted for the crystal growth, where the selection of appropriate flux agent (high temperature solvent) is vital, especially for the crystals with incongruent features.…”

Section: Approaches For Recob Crystal Growthmentioning

confidence: 99%

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Rare-Earth Calcium Oxyborate Piezoelectric Crystals ReCa4O(BO3)3: Growth and Piezoelectric Characterizations

Duan

Zhang

et al. 2014

Crystals

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Rare-earth calcium oxyborate crystals, ReCa 4 O(BO 3 ) 3 (ReCOB, Re = Er, Y, Gd, Sm, Nd, Pr, and La ), are potential piezoelectric materials for ultrahigh temperature sensor applications, due to their high electrical resistivity at elevated temperature, high piezoelectric sensitivity and temperature stability. In this paper, different techniques for ReCOB single-crystal growth are introduced, including the Bridgman and Czochralski pulling methods. Crystal orientations and the relationships between the crystallographic and physical axes of the monoclinic ReCOB crystals are discussed. The procedures for dielectric, elastic, electromechanical and piezoelectric property characterization, taking advantage of the impedance method, are presented. In addition, the maximum piezoelectric coefficients for different piezoelectric vibration modes are explored, and the optimized crystal cuts free of piezoelectric cross-talk are obtained by rotation calculations.

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Section: Bridgman Methodsmentioning

confidence: 99%

Section: Cz Pulling Methodsmentioning

confidence: 99%

Section: Approaches For Recob Crystal Growthmentioning

confidence: 99%

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Rare-Earth Calcium Oxyborate Piezoelectric Crystals ReCa4O(BO3)3: Growth and Piezoelectric Characterizations

Duan

Zhang

et al. 2014

Crystals

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“…Among oxyborate crystals, rare-earth calcium oxyborate crystals ReCa 4 O(BO 3 ) 3 (ReCOB, Re: Rare-earth) with monoclinic phase and space group C m were extensively investigated, due to their attractive properties for optical and piezoelectric applications [7][8][9][10][11][12][13][14]. Besides, ReCOB was reported to possess congruent melting point (~1500 o C), thus can be readily grown into large size crystals (3~4 inches diameter) by traditional Czochralski and Bridgeman methods [2,15,16].…”

Section: Introductionmentioning

confidence: 99%

Pyroelectric properties of ReCOB and BiBO oxyborate crystals with monoclinic symmetry

Hou

Zhang

et al. 2013

2013 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications

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Pyroelectric properties of oxyborate crystals with monoclinic structure, including ReCa 4 O(BO 3 ) 3 (ReCOB, Re: rare-earth elements) and BiB 3 O 6 (BiBO), were investigated by charge integration method. The pyroelectric p 1 of ReCOB crystals was found to be negative, being on the order of -59.3~-65.5 C/(m 2 · o C) at 30 o C, while the pyroelectric p 3 was determined to be positive, being around 11.6~31.0 C/(m 2 · o C). The pyroelectric coefficients p 1 and p 3 for ReCOB crystals were observed to decrease with increasing temperature, with variations being on the order of -10.8% to -79.1% over the test temperature range of 20~180 o C. Comparing with ReCOB crystals, larger pyroelectric coefficient (p 2 ) was obtained for BiBO crystals, being on the order of 105.0 C/(m 2 · o C) at room temperature, maintaining the similar value up to 180 o C. Of particular interest is that ReCOB and BiBO crystals were found to possess relative high detectivity F d , two to three times that of commercial TGS and LiTaO 3 .

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REECOB: 20 years of rare earth element calcium oxoborates crystal growth research

Möckel

Reuther

Götze

2013

Journal of Crystal Growth

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Bridgman growth of large-aperture yttrium calcium oxyborate crystal

Cited by 10 publications

References 16 publications

Rare-Earth Calcium Oxyborate Piezoelectric Crystals ReCa4O(BO3)3: Growth and Piezoelectric Characterizations

Rare-Earth Calcium Oxyborate Piezoelectric Crystals ReCa4O(BO3)3: Growth and Piezoelectric Characterizations

Pyroelectric properties of ReCOB and BiBO oxyborate crystals with monoclinic symmetry

REECOB: 20 years of rare earth element calcium oxoborates crystal growth research

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