Growth of (1 - X)NaNbO3-xBaTiO3 single crystals by slow-cooling and flux methods

Takayuki Watanabe, Hisato Yabuta, Miki Ueda, Masatoshi Watanabe, Tatsuya Suzuki, Kaoru Miura, Naoko Ito, Nobuhiro Kumada

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

(1 - x)NaNbO3-xBaTiO3 single crystals were grown by slow-cooling and flux methods. In the slow-cooling method, 0.88NaNbO 3-0.12BaTiO3 powder was melted in a platinum crucible at 1500 °C and cooled down to 1000 °C. Slow cooling at less than 21 °C/h led to a bulky single crystal, and the BaTiO3/NaNbO 3 ratio was graded inside the single crystal as expected from the phase diagram. Further slow cooling at 5 °C/h with the aim of improving the compositional uniformity increased the level of contamination of platinum in the single crystals from the crucible. Cuboidal single crystals with a (100) facet were grown in Na2B4O7 flux through a cooling process from 1200 to 1000 °C at 1 °C/h. There was no compositional gradient inside the cuboidal crystals, and the BaTiO3 content of the single crystals remained within 2-3% irrespective of the raw powder/flux ratio and the BaTiO3 composition in the raw powder. The obtained single crystals were orthorhombic ferroelectrics with a phase transition temperature of 310-330 °C.

Original languageEnglish
Article number09KC02
JournalJapanese Journal of Applied Physics
Volume52
Issue number9 PART2
DOIs
Publication statusPublished - Sep 1 2013
Externally publishedYes

Fingerprint

Single crystals
Fluxes
Cooling
cooling
single crystals
Crucibles
crucibles
Powders
Platinum
platinum
Superconducting transition temperature
Ferroelectric materials
Phase diagrams
flat surfaces
contamination
Contamination
Phase transitions
transition temperature
phase diagrams
gradients

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Watanabe, T., Yabuta, H., Ueda, M., Watanabe, M., Suzuki, T., Miura, K., ... Kumada, N. (2013). Growth of (1 - X)NaNbO3-xBaTiO3 single crystals by slow-cooling and flux methods. Japanese Journal of Applied Physics, 52(9 PART2), [09KC02]. https://doi.org/10.7567/JJAP.52.09KC02

Growth of (1 - X)NaNbO3-xBaTiO3 single crystals by slow-cooling and flux methods. / Watanabe, Takayuki; Yabuta, Hisato; Ueda, Miki; Watanabe, Masatoshi; Suzuki, Tatsuya; Miura, Kaoru; Ito, Naoko; Kumada, Nobuhiro.

In: Japanese Journal of Applied Physics, Vol. 52, No. 9 PART2, 09KC02, 01.09.2013.

Research output: Contribution to journalArticle

Watanabe, T, Yabuta, H, Ueda, M, Watanabe, M, Suzuki, T, Miura, K, Ito, N & Kumada, N 2013, 'Growth of (1 - X)NaNbO3-xBaTiO3 single crystals by slow-cooling and flux methods', Japanese Journal of Applied Physics, vol. 52, no. 9 PART2, 09KC02. https://doi.org/10.7567/JJAP.52.09KC02
Watanabe, Takayuki ; Yabuta, Hisato ; Ueda, Miki ; Watanabe, Masatoshi ; Suzuki, Tatsuya ; Miura, Kaoru ; Ito, Naoko ; Kumada, Nobuhiro. / Growth of (1 - X)NaNbO3-xBaTiO3 single crystals by slow-cooling and flux methods. In: Japanese Journal of Applied Physics. 2013 ; Vol. 52, No. 9 PART2.
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