Langasite, langanite, and langatate bulk-wave Y-cut resonators

被引：67
|
作者：
Smythe, RC [1 ]
Helmbold, RC [1 ]
Hague, GE [1 ]
Snow, KA [1 ]
机构：
[1] Piczo Technol Inc, Orlando, FL 32804 USA
来源：
IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL | 2000年 / 47卷 / 02期
关键词：
D O I：
10.1109/58.827420
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
Materials in the langasite family are of current interest for both bulk wave and surface wave devices. Plano-convex Y-cut bulk wave resonators have been built and tested on overtones 1 through 9 using LGS (langasite; La(3)Ga(5)SiO(14)), LGN (langanite; La(3)Ga(5.5)Nb(0.5)O(14)), and LGT (langatate; La(3)Ga(5.5)Ta(0.5)O(14)). Frequencies and motional inductances are compared with calculated values, with good agreement except for the motional inductance of LGT. For all three materials, frequency variation is an essentially parabolic function of temperature. For LGN and LGT, reported values of the Q-frequency product are significantly above the classical limit for AT-cut quartz. A maximum Q.f value of 25.6 x 10(6), where frequency is in megahertz, was observed for an LGT resonator; for an unplated resonator, 29.2 x 10(6) was measured. Still higher values are believed possible.
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收藏
页码：355 / 360
页数：6
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