Piezoelectric single crystal and surface acoustic wave element e

Details Piezoelectric single crystal and surface acoustic wave element e Piezoelectric single crystal and surface acoustic wave element e

1980-08-15

1982-06-08

Miller, J. D.

Compositions

Piezoelectric

310358, 310313A, 423331, C04B 3500

Patent

active

043338429

ABSTRACT:
A piezoelectric single crystal which has a composition represented by a general formula (Ba.sub.2-x Sr.sub.x)TiSi.sub.2 O.sub.8, the value x lying within a range of 0.25.ltoreq.x.ltoreq.1.2; and a surface acoustic wave element which is so constructed as to employ surface waves that propagate on a cut plane perpendicular to the Z-axis of the single crystal, or surface waves that propagate in a specified direction on a cut plane containing the X-axis of the single crystal. The piezoelectric single crystal and the surface acoustic wave element employing it have the merits that the electromechanical coupling factor of the surface acoustic waves is great and that the temperature coefficient of delay time of the surface acoustic waves is small.

REFERENCES:
patent: 2974203 (1961-03-01), Flaschen et al.
patent: 4233282 (1980-11-01), Arendt
Ito, Y. et al., "Surface Acoustic Wave Characteristics of (Ba.sub.2-x Sr.sub.x)TiSi.sub.2 O.sub.8 Crystals", Applied Physics Letters, vol. 80, 36(11), pp. 894-895.

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