Fabrication of ferroelectric silicate KNbSi2O7 single crystal
Source abstract
Abstract
ABSi2O7 is a new ferroelectric material group of which ferroelectricity has been discovered recently. In this study, we focused on potassium niobate silicate (KNbSi2O7), which comprises displacement-type ferroelectric substance KNbO3 and high-covalence substance SiO2 in the structure. KNbSi2O7 single crystals with a size of 10 × 10 × 1 mm3 were fabricated by the process of glass crystallization, re-melting, and slow-cooling. The polarization-electric field (P-E) curve of the KNbSi2O7 crystal was evaluated and KNbSi2O7 evidently showed ferroelectricity in the direction of c axis. The value of the spontaneous polarization was estimated to 0.11 µC/cm2. The dielectric permittivity was approximately 15 for both a and c axes at 1 MHz, and this material was found to be a ferroelectric material with low dielectric permittivity.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Ferroelectric and Piezoelectric Materials · Glass properties and applications · Acoustic Wave Resonator Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Nano-Phononics Lab., Graduate School of Science and Engineering, Tokyo Institute of Technology
References (19)
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