Influence of Oxygen Partial Pressure during Growth on Optical and Electrical Properties of Ca3TaAl3Si2O14 Single Crystals

被引：19

作者：

Fu, Xiuwei ^{[1
,2
]}

Villora, Encarnacion G. ^{[1
]}

Matsushita, Yoshitaka ^{[1
]}

Kitanaka, Yuuki ^{[3
]}

Noguch, Yuji ^{[3
]}

Miyayama, Masan' ^{[3
]}

Shimamura, Kiyoshi ^{[1
,2
]}

Ohashi, Naoki ^{[1
,4
]}

机构：

[1] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050044, Japan

[2] Waseda Univ, Grad Sch Adv Sci & Engn, Shinjuku Ku, Tokyo 1698555, Japan

[3] Univ Tokyo, Dept Appl Chem, Bunkyo Ku, Tokyo 1138656, Japan

[4] Tokyo Inst Technol, Mat Res Ctr Element Strategy, Midori Ku, Yokohama, Kanagawa 2268503, Japan

来源：

CRYSTAL GROWTH & DESIGN | 2016年 / 16卷 / 04期

关键词：

Aluminum compounds - Lanthanum compounds - Piezoelectricity - Calcium compounds - High temperature applications - Oxygen - Partial pressure - Silicon compounds;

D O I：

10.1021/acs.cgd.5b01822

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Among the langasite family, Ca3TaAl3Si2O4 (CTAS) is particularly promising for high temperature sensor applications due to its relatively high resistivity. In this work, CTAS single crystals have been grown by the Czochralski technique under various oxygen partial pressures using Ir and Pt crucibles. Colorless CTAS crystals were grown for the first time; however, the elimination of related defects did not influence the electrical properties. Furthermore, dielectric and piezoelectric properties were independent of growth conditions. Instead, the electrical resistivity was found to be remarkably higher the lower the oxygen partial pressure, reaching a value of similar to 7 X 10(10) Q cm at 400 degrees C, which is 3 orders of magnitude higher than that of disordered LTGA. Therefore, grown CTAS crystals are promising for high temperature piezoelectric sensor applications.

引用

页码：2151 / 2156

页数：6

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