An analysis of “best” LGS material constants based on BAW and SAW data

Author

Kosinski, John A. ; Bigler, Emmanuel

Author_Institution

AMSE, U.S. Army CECOM, Monmouth, NJ, USA

Volume

1

fYear

2000

fDate

36800

Firstpage

529

Abstract

Since the first publication of material constants of langasite (LGS) and their temperature coefficients, a careful examination of the progression of reported values shows that they appear to be converging toward a “best” set of material constants. In this work, an “aggregate” set of the measured values of bulk wave velocities is used in order to provide a “best” set of measurement data for BAW propagation. A “best” set of material constants is extracted from this data, in conjunction with the aggregated dielectric constant and lattice constant data. This new set of material constants is able to predict wave velocities to better than 0.5% for most orientations

Keywords

acoustic wave velocity; gallium compounds; lanthanum compounds; lattice constants; permittivity; surface acoustic waves; BAW velocity; LGS; La₃Ga₅SiO₁₄; SAW velocity; dielectric constant; langasite; lattice constant; material constants; temperature coefficients; Data mining; Dielectric constant; Dielectric materials; Dielectric measurements; Lattices; Piezoelectric devices; Surface acoustic waves; Surface waves; Temperature; Velocity measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 2000 IEEE

Conference_Location

San Juan

ISSN

1051-0117

Print_ISBN

0-7803-6365-5

Type

conf

DOI

10.1109/ULTSYM.2000.922605

Filename

922605