Crystal Growth of Ca3Nb(Ga1-xAlx)3Si2O14 Piezoelectric Single Crystals with Various Al Concentrations

被引：20

作者：

Yokota, Yuui ^{[1
]}

Kudo, Tetsuo ^{[2
]}

Ohashi, Yuji ^{[2
]}

Medvedev, Andrey ^{[2
]}

Kurosawa, Shunsuke ^{[1
,2
]}

Kamada, Kei ^{[1
,3
]}

Yoshikawa, Akira ^{[1
,2
,3
]}

机构：

[1] Tohoku Univ, New Ind Creat Hatchery Ctr NICHe, Aoba Ku, Sendai, Miyagi 9808579, Japan

[2] Tohoku Univ, Inst Mat Res, Aoba Ku, Sendai, Miyagi 9808577, Japan

[3] C&A Corp, Aoba Ku, Sendai, Miyagi 9808579, Japan

来源：

MATERIALS | 2015年 / 8卷 / 09期

基金：

日本科学技术振兴机构;

关键词：

langasite; piezoelectric crystal; single crystal; micro-pulling-down method; SUBSTITUTION; ALUMINUM;

D O I：

10.3390/ma8095264

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Ca3Nb(Ga1-xAlx)(3)Si2O14 (CNGAS) single crystals with various Al concentrations were grown by a micro-pulling-down (mu-PD) method and their crystal structures, chemical compositions, crystallinities were investigated. CNGAS crystals with x = 0.2, 0.4 and 0.6 indicated a single phase of langasite-type structure without any secondary phases. In contrast, the crystals with x = 0.8 and 1 included some secondary phases in addition to the langasite-type phase. Lattice parameters, a- and c-axes lengths, of the langasite-type phase systematically decreased with an increase of Al concentration. The results of chemical composition analysis revealed that the actual Al concentrations in as-grown crystals were almost consistent with the nominal compositions. In addition, there was no large segregation of each cation along the growth direction.

引用

页码：5597 / 5605

页数：9

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