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 language | English |
|---|---|
| Article number | 09KC02 |
| Journal | Japanese Journal of Applied Physics |
| Volume | 52 |
| Issue number | 9 PART2 |
| DOIs | |
| Publication status | Published - Sep 1 2013 |
| Externally published | Yes |
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All Science Journal Classification (ASJC) codes
- Engineering(all)
- Physics and Astronomy(all)
Cite this
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 journal › Article
}
TY - JOUR
T1 - Growth of (1 - X)NaNbO3-xBaTiO3 single crystals by slow-cooling and flux methods
AU - Watanabe, Takayuki
AU - Yabuta, Hisato
AU - Ueda, Miki
AU - Watanabe, Masatoshi
AU - Suzuki, Tatsuya
AU - Miura, Kaoru
AU - Ito, Naoko
AU - Kumada, Nobuhiro
PY - 2013/9/1
Y1 - 2013/9/1
N2 - (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.
AB - (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.
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U2 - 10.7567/JJAP.52.09KC02
DO - 10.7567/JJAP.52.09KC02
M3 - Article
VL - 52
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
SN - 0021-4922
IS - 9 PART2
M1 - 09KC02
ER -