Title :
Piezoelectric and acoustic properties of potassium titanyl phosphate (KTP) and its isomorphs
Author :
Chu, David K T ; Bierlein, John D. ; Hunsperger, Robert G.
Author_Institution :
E.I. du Pont de Nemours & Co. Inc., Wilmington, DE, USA
Abstract :
The bulk elastic and piezoelectric properties of potassium titanyl phosphate (KTP) and some of its family members such as RbTiOPO/sub 4/ (RTP) and RbTiOAsO/sub 4/ (RTA) have been determined. The piezoelectric, elastic, and dielectric matrix (P-E-D) of KTP has been completely characterized. Values for the temperature dependence of the expansion coefficients and elastic constants have been obtained, and the effects of variations in dielectric constant on coupling coefficient determined. The major diagonal elements of the piezoelectric and elastic matrices of RTP and RTA were measured as were the thermal expansion coefficient of all the KTP isomorphs, KTP in the temperature range 25-80 degrees C, is shown to have a combination of large coupling coefficients (up to k/sub t/=38% for hydrothermally grown KTP) and medium temperature dependence coefficients of elastic constant (as low as 40 p.p.m./ degrees C for tau /sub c33/ for hydrothermally grown KTP) that makes it attractive for many piezoelectric applications.<>
Keywords :
crystal resonators; elastic constants; permittivity; piezoelectric materials; potassium compounds; rubidium compounds; thermal expansion; 25 to 80 C; KTP; KTiOPO4; RbTiOAsO/sub 4/; RbTiOPO/sub 4/; acoustic properties; bulk elastic properties; coupling coefficient; coupling coefficients; diagonal elements; dielectric constant; dielectric matrix; elastic constants; elastic matrices; expansion coefficients; hydrothermally grown KTP; isomorphs; piezoelectric elastic dielectric matrix; piezoelectric matrices; piezoelectric properties; temperature dependence; temperature range; thermal expansion coefficient; Crystalline materials; Dielectric constant; Filters; Frequency control; Lithium niobate; Nonlinear optics; Optical materials; Piezoelectricity; Temperature dependence; Ultrasonic variables measurement;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
