TY - JOUR
T1 - Growth and piezoelectric properties of R3Ga5SiO 14 and RCa4O(BO3)3 (R: Rare-earth elements) single crystals
AU - Takeda, Hiroaki
AU - Nakao, Hiroshi
AU - Izukawa, Shintaro
AU - Shimizu, Hiroyuki
AU - Nishida, Takashi
AU - Okamura, Soichiro
AU - Shiosaki, Tadashi
PY - 2006/2/9
Y1 - 2006/2/9
N2 - R3Ga5SiO14 (RGS, R: rare-earth elements) and RCa4O(BO3)3 (RCOB) single crystals were synthesized by the Czochralski technique and their piezoelectric properties were investigated. The piezoelectric moduli, d11 and d14, of La3Ga5SiO14 are higher than those of Nd 3Ga5SiO14. Moreover, in the RGS-type crystal, we found that the piezoelectric modulus, d11, increased with the lattice parameter a. The ionic size preferences of all cation sites in the RGS-type structure were also clarified. Based on these results, a new RGS-type Ba3TaGa3Si2O14 crystal was synthesized. We have successfully grown RCOB (R = La, Nd, Gd, Dy, and Y) single crystals with 1 and 2 in. diameter dimensions. The surface acoustic wave (SAW) properties of RCOB filters were investigated. In RCOB, the NdCOB single crystal showed the highest electromechanical coupling factors and lowest temperature coefficient of delay of the RCOB crystals.
AB - R3Ga5SiO14 (RGS, R: rare-earth elements) and RCa4O(BO3)3 (RCOB) single crystals were synthesized by the Czochralski technique and their piezoelectric properties were investigated. The piezoelectric moduli, d11 and d14, of La3Ga5SiO14 are higher than those of Nd 3Ga5SiO14. Moreover, in the RGS-type crystal, we found that the piezoelectric modulus, d11, increased with the lattice parameter a. The ionic size preferences of all cation sites in the RGS-type structure were also clarified. Based on these results, a new RGS-type Ba3TaGa3Si2O14 crystal was synthesized. We have successfully grown RCOB (R = La, Nd, Gd, Dy, and Y) single crystals with 1 and 2 in. diameter dimensions. The surface acoustic wave (SAW) properties of RCOB filters were investigated. In RCOB, the NdCOB single crystal showed the highest electromechanical coupling factors and lowest temperature coefficient of delay of the RCOB crystals.
KW - Borate
KW - Crystal growth
KW - Gallate
KW - Piezoelectricity
KW - Rare-earth element
UR - http://www.scopus.com/inward/record.url?scp=31344436660&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2004.12.108
DO - 10.1016/j.jallcom.2004.12.108
M3 - Conference article
AN - SCOPUS:31344436660
SN - 0925-8388
VL - 408-412
SP - 474
EP - 479
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
T2 - Proceedings of the Rare Earths'04 in Nara, Japan
Y2 - 7 November 2004 through 12 November 2004
ER -