Measured properties of doubly rotated dilithium tetraborate (Li/sub 2/B/sub 4/BO/sub 7/) resonators and transducers

Kosinski, J.A.; Ballato, A.; Lu, Yicheng

doi:10.1109/58.212564

Cited by 7 publications

(1 citation statement)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The measured properties of the TA-cut are particularly interesting. 183 The c-mode features nearly zero first and second order temperature coefficients of frequency, and a third order temperature coefficient only half that of quartz. The b-mode features a Qxf product larger than that of AT-cut quartz.…”

Section: Diomignite Device Propertiesmentioning

confidence: 98%

New Piezoelectric Substrates for Saw Devices

Kosinski

2000

Int. J. Hi. Spe. Ele. Syst.

View full text Add to dashboard Cite

Recent developments in single crystal piezoelectric materials have focused on the search for "ideal" materials with zero temperature coefficient of frequency orientations featuring jointly high piezoelectric coupling, high intrinsic Q, zero power flow angle, and minimized diffraction effects. In addition, the desired materials should have no low temperature phase transitions, and a physical chemistry conducive to repeatable, low cost growth and wafer scale device production. As difficult as it might seem to find such "ideal" materials, three completely different but strong candidate materials have emerged recently: the quartz homeotype gallium orthophosphate, the quartz isotype calcium gallogermanates (langasite, langanite, langatate, etc.), and diomignite (lithium tetraborate). The current state-of-the-art and prospects for future development of these materials are considered.

show abstract

Section: Diomignite Device Propertiesmentioning

confidence: 98%

New Piezoelectric Substrates for Saw Devices

Kosinski

2000

Int. J. Hi. Spe. Ele. Syst.

View full text Add to dashboard Cite

show abstract

Pure-mode measurements of Li/sub 2/B/sub 4/O/sub 7/ material properties

Kosinski¹,

Ballato

1994

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

Self Cite

View full text Add to dashboard Cite

Ahtruct-Recent measurements of doubly rotated plate resonators have highlighted the need for more accurate material constants for use in dilithium tetraborate resonator design. In this paper, we report on the room-temperature determination of the elastic, piezoelectric, and dielectric constants of dilithium tetraborate using frequency domain measurements of primarily pure-mode vibrations in thin, flat plates.

show abstract

Advances in high-Q piezoelectric resonator materials and devices

Ballato

Gualtieri

1994

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

Self Cite

View full text Add to dashboard Cite

In order to compare piezoelectric materials and devices, an intrinsic parameter, the motional time constant tau(1)/sup (m/)=(omega/sub m/Q/sub m/)(-1) for a particular mode m is employed. The use of tau(1)/sup (m/) follows from the accommodation of acoustic loss in the elastic compliance/stiffness and the establishment of material coefficients that are elements of viscosity matrices. Alternative and fully equivalent definitions of tau(1) are given based on the RC time constant derived from the equivalent circuit representation of a crystal resonator, acoustic attenuation, logarithmic decrement, and viscosity or damping. For quartz devices, the variation of tau(1): for any simple thickness mode, for the Y'X shear mode for rotated Y-cuts, and with diameter-thickness ratio for AT-cuts is discussed. Other factors such as mounting loss and loss caused by crystal inhomogeneities (dislocations, defect positions in the resonator, and impurity migration under vibrational stress) are briefly considered with quartz devices as the model. Some new piezoelectric materials/material constants/devices are reviewed and their motional time constants are compared. A physical parameter, composed of acoustic velocity, piezoelectric coupling, and tau(1) is identified which aids in understanding the maximum frequency limitations of plate resonators.

show abstract

Measured properties of doubly rotated dilithium tetraborate (Li/sub 2/B/sub 4/BO/sub 7/) resonators and transducers

Cited by 7 publications

References 12 publications

New Piezoelectric Substrates for Saw Devices

New Piezoelectric Substrates for Saw Devices

Pure-mode measurements of Li/sub 2/B/sub 4/O/sub 7/ material properties

Advances in high-Q piezoelectric resonator materials and devices

Contact Info

Product

Resources

About