Growth of Incipient Ferroelectric KTaO3 Single Crystals by a Modified Self-Flux Solution Method
authors Zlotnik, S; Vilarinho, PM; Costa, MEV; Moreira, JA; Almeida, A
nationality International
journal CRYSTAL GROWTH & DESIGN
keywords POTASSIUM TANTALATE; RESONANCE; SRTIO3
abstract High-quality potassium tantalate (KTaO3, KT) single crystals are grown by a high-temperature self-flux solution modified method in which potassium carbonate (K2CO3) and boron oxide (B2O3) are utilized as a complex flux. Additions of small amounts of boron oxide, used because of its low melting temperature (450 degrees C) and tendency to decrease the weight losses, increased the metastable region, requiring lower temperature (<= 1300 degrees C) for the growth of relatively large KT crystals thereby suppressing the K volatilization tendency. By changing the flux composition and flux to solute proportion growth conditions are modified. The as-grown potassium tantalate crystals exhibit a dielectric permittivity of 6600 and dielectric losses of 0.004 at 13 K and 100 kHz. These results suggest a new promising approach for growing relatively large size and high quality single crystals within KT-based system.
publisher AMER CHEMICAL SOC
issn 1528-7483
year published 2010
volume 10
issue 8
beginning page 3397
ending page 3404
digital object identifier (doi) 10.1021/cg100036v
web of science category Chemistry, Multidisciplinary; Crystallography; Materials Science, Multidisciplinary
subject category Chemistry; Crystallography; Materials Science
unique article identifier WOS:000280471700018
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