Flux-Mediated Topochemical Growth of Platelet-Shaped Perovskite LiNbO3 Single Crystals from Layered Potassium Niobate Crystals

Dae Wook Kim, Tomohito Sudare, Takumi Nakanishi, Satoshi Yuasa, Kunio Yubuta, Nobuyuki Zettsu, Katsuya Teshima

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Well-defined, platelet-shaped LiNbO3 single crystals were prepared by a flux-mediated topochemical reaction from platelet K4Nb6O17 crystals with a mixture of LiNO3 solute and alkali metal nitrate (LiNO3, NaNO3, and KNO3) fluxes at 600 °C. Crystallographic structural characterizations revealed that the LiNbO3 crystals inherited the K4Nb6O17 crystal shape with well-developed {012} faces. The topochemical reaction in molten KNO3 promoted smooth surface formation, in contrast to LiNO3 and NaNO3, which formed rough surfaces. We further found that the dissolution and deposition reaction occurs repeatedly in the vicinity of the LiNbO3 crystal and KNO3 flux interface. It is considered that the KNO3 flux hybridized with the LiNO3 solute provides a moderate solubility and dissolution rate suitable for crystal growth. We also achieved reed-shaped LiNbO3 crystal growth by applying the same technique to the KNb3O8 crystal template.

Original languageEnglish
Pages (from-to)4111-4116
Number of pages6
JournalCrystal Growth and Design
Volume18
Issue number7
DOIs
Publication statusPublished - 2018 Jul 5
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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