Growth and characterization of strontium-substituted La3Ta0.5Ga5.5O14 single crystals

Growth and characterization of strontium-substituted La3Ta0.5Ga5.5O14 single crystals

The effects of strontium substitution on the electrical properties of La3Ta0.5Ga5.5O14 (LTG) are reported. Strontium substituted LTG (Sr-LTG) with a nominal chemical composition La2.9Sr0.1Ta0.55Ga5.45O14 crystals were grown using the conventional Czochralski method under high and low oxygen partial...

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Veröffentlicht in:Journal of the Ceramic Society of Japan 2022/01/01, Vol.130(1), pp.16-20
Hauptverfasser: TAKEDA, Hiroaki, SOBATA, Yudai, USUI, Haruki, KODAMA, Shohei, YANASE, Ikuo, HOSHINA, Takuya, TSURUMI, Takaaki, SHIMAMURA, Kiyoshi
Format: Artikel
Sprache:eng
Schlagworte:
Chemical composition
Crystal growth
Crystallography
Crystals
Czochralski method
Electrical properties
High temperature
Langasite
Oxides
Piezoelectricity
Pressure sensors
Single crystals
Substitutes
Thermal expansion
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Zusammenfassung:The effects of strontium substitution on the electrical properties of La3Ta0.5Ga5.5O14 (LTG) are reported. Strontium substituted LTG (Sr-LTG) with a nominal chemical composition La2.9Sr0.1Ta0.55Ga5.45O14 crystals were grown using the conventional Czochralski method under high and low oxygen partial pressures. The electrical properties and thermal behaviors of the Sr-LTG crystals were also compared with those of pure crystals. Sr substitution was found to affect the electroacoustic constants and thermal expansion coefficient clearly. These characteristics are discussed from crystallographic perspectives. The Sr-LTG crystals grown at low oxygen partial pressures exhibited higher electrical resistivity ρ for pressure sensors used at high temperatures.
ISSN:1882-0743
1348-6535
DOI:10.2109/jcersj2.21116