Czochralski growth and characterization of piezoelectric single crystals with langasite structure: La3Ga5SiO14 (LGS), La3Ga5.5Nb0.5O14 (LGN) and La3Ga5.5Ta0.5O14 (LGT) II. Piezoelectric and elastic properties

Böhm, J.; Chilla, E.; Flannery, C.M.; Fröhlich, H.-J.; Hauke, T.; Heimann, Robert B.; Hengst, M.; Straube, U.

doi:10.1016/s0022-0248(00)00440-1

Cited by 185 publications

(81 citation statements)

References 7 publications

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“…This proved that Al is incorporated into the grown crystals. The material constants of LTG (LTGA0.0) crystals are consistent with those reported by Bohm et al 27) and Onozato et al 28) Electromechanical coupling factors k Figure 3 shows the changes in piezoelectric strain d ij constants as a function of x in LTGAx. With an increase in the Al content, the absolute piezoelectric strain modulus d 11 remains constant, while d 14 increases by 14%.…”

Section: Resultssupporting

confidence: 87%

Cation distribution and piezoelectric properties of aluminum substituted La3Ta0.5Ga5.5O14 single crystals

Takeda

Yamaura

Hoshina

et al. 2010

J. Ceram. Soc. Japan

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We report the structure and electric properties of La 3 Ta 0.5 Ga 5.5¹x Al x O 14 (LTGAx, x = 0.0 (LTG), 0.3 and 0.5) single crystals, with a Ca 3 Ga 2 Ge 4 O 14 -type structure, suitable for high temperature piezoelectric application. A single-crystal X-ray structure analysis reveals that Al atoms are distributed in all cation sites except for the decahedral site occupied by La, which favors instead the octahedral site. The piezoelectric moduli d 11 kept a constant, whereas «d 14 « increased 14% with the increasing Al content, x, up to 0.5. The LTGA0.5 crystals showed a low temperature dependence (2% deviation from room temperature to 400°C) of d 11 and a higher electric resistivity µ than those of the LTG crystals. The Al substitution is effective for improving the electrical properties of the LTG.

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Section: Resultssupporting

confidence: 87%

Cation distribution and piezoelectric properties of aluminum substituted La3Ta0.5Ga5.5O14 single crystals

Takeda

Yamaura

Hoshina

et al. 2010

J. Ceram. Soc. Japan

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“…Besides crystal growth, J. Bohm et al reported some properties of LGT, LGS and LGN, such as electric conductivity, optical activity, piezoelectric and elastic properties [7,8]. In 2002, J. Stade et al reported electro-optic, piezoelectric and dielectric properties of LGT, LGS and LGN [9], and D. C. Malocha et al measured the LGT thermal coefficients of expansion and density [10].…”

Section: Introductionmentioning

confidence: 99%

“…Until now, LGT crystal has been mainly researched as a piezoelectric material as Ref. [5][6][7][8]11]. To our knowledge, no paper about its EO application research has been published.…”

Section: Introductionmentioning

confidence: 99%

Growth and characterization of La₃Ga_5.5Ta_0.5O₁₄ crystal

Kong¹,

Wang

Zhang

et al. 2004

Cryst. Res. Technol.

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La 3 Ga 5.5 Ta 0.5 O 14 (LGT) crystal was grown by using the Czochralski method. The as-grown crystal is transparent, free from inclusions and with no cracks. Specific heat, thermal expansion, dielectric constants, transmission spectrum and optical damage threshold of LGT have been measured, and the results show general properties of LGT are similar to that of La 3 Ga 5 SiO 14 (LGS) crystal. The experiment to research the Qswitch properties of LGT has been performed and the results show LGT possesses smaller electrooptic coefficients than that of LGS and may not be an ideal material used as a Q-switch.

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“…Due to phase transition and low piezoelectricity [2], α-quartz cannot be applied in the high-temperature environment and high sensitive transducers. Fortunately, langasite-type crystals, represented by general chemical formula A 3 BC 3 D 2 O 14 , are a class of excellent candidates because of no phase transition and high piezoelectricity, such as La 3 Ga 5 SiO 14 (LGS), La 3 Ga 5.5 Ta 0.5 O 14 (LGT) [3,4] [5][6][7] and so on. However, high cost of gallium oxide severely hampered their widespread use.…”

Section: Introductionmentioning

confidence: 99%

Growth and characterization of a new langasite‐type single crystal Sr₃NbAl_1.5Ga_1.5Si₂O₁₄

Zeng¹,

Zheng²,

Kong³

et al. 2011

Cryst. Res. Technol.

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Single crystals of Sr 3 NbAl 1.5 Ga 1.5 Si 2 O 14 (SNAGS) with langasite structure have been successfully grown by Czochralski method. The X-ray diffraction (XRD) verified that the as-grown crystal was isostructural with A 3 BC 3 D 2 O 14 structure and the lattice parameters were calculated as follows: a = 8.242 Å, c = 5.041 Å, V = 296.6 Å 3 . The piezoelectric coefficient d 11 was 5.7 pC/N, which was 2.47 times of α-quartz (d 11 =2.31 pC/N). The electric resistivity was up to 3.04×106 Ωcm at 700 °C for X-cut sample. In addition, the transmission spectrum of the SNAGS crystal showed that it had a high transmittance (>80%) in the range of 350-800 nm and exceeded 90% above 520 nm. These results suggest that the SNAGS crystals have potential applications in high-temperature piezoelectric sensors and optical techniques.

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Czochralski growth and characterization of piezoelectric single crystals with langasite structure: La3Ga5SiO14 (LGS), La3Ga5.5Nb0.5O14 (LGN) and La3Ga5.5Ta0.5O14 (LGT) II. Piezoelectric and elastic properties

Cited by 185 publications

References 7 publications

Cation distribution and piezoelectric properties of aluminum substituted La3Ta0.5Ga5.5O14 single crystals

Cation distribution and piezoelectric properties of aluminum substituted La3Ta0.5Ga5.5O14 single crystals

Growth and characterization of La₃Ga_5.5Ta_0.5O₁₄ crystal

Growth and characterization of a new langasite‐type single crystal Sr₃NbAl_1.5Ga_1.5Si₂O₁₄

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Czochralski growth and characterization of piezoelectric single crystals with langasite structure: La3Ga5SiO14 (LGS), La3Ga5.5Nb0.5O14 (LGN) and La3Ga5.5Ta0.5O14 (LGT) II. Piezoelectric and elastic properties

Cited by 185 publications

References 7 publications

Cation distribution and piezoelectric properties of aluminum substituted La3Ta0.5Ga5.5O14 single crystals

Cation distribution and piezoelectric properties of aluminum substituted La3Ta0.5Ga5.5O14 single crystals

Growth and characterization of La3Ga5.5Ta0.5O14 crystal

Growth and characterization of a new langasite‐type single crystal Sr3NbAl1.5Ga1.5Si2O14

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Growth and characterization of La₃Ga_5.5Ta_0.5O₁₄ crystal

Growth and characterization of a new langasite‐type single crystal Sr₃NbAl_1.5Ga_1.5Si₂O₁₄