High-performance lithium niobate acoustic surface wave transducers and delay lines

High-performance lithium niobate acoustic surface wave transducers and delay lines

conclusion, optimising tudinal and transverse crystal is discussed. the ratios of the longidimensions of the (966) Acoustic second-harmonic generati...

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conclusion, optimising tudinal and transverse crystal is discussed.

the ratios of the longidimensions of the (966)

Acoustic second-harmonic generation in pieaoelsctric crystals McMahon, D. H JASA, Vol 44, No 4 (October 1968) p 1007 Extending the treatment of acoustic second harmonic generation to piezoelectric crystals, the investigation relates the effective elastic constants to all of the electric and elastic material constants of the crystal free energy so as to deduce the effect of the piezoelectricity. The calculated effective secon+(and third-) order elastic constants are given and the discussion restricts itself to longitudinal waves along the z-axis in LiNbO, and estimates the relative sizes of terms contributing to the effective elastic constants. Measurements using optical Bragg scattering are used to this effect. The final results give the various terms as fractions of the measured value. (967) Piezoelectric transducer system Agalides, E., Stewart, L.C. US Patent 3, 409,787 (5 November (Filed 15 November 1966) (968) Ultrasonic. holography Aldridge, E E Physics Bulletin, Vol 20 (January pp 10-12 (969)

1968)

1969)

Feasibllitv studies for an acoustic image conversion system [For use up to 425°F and for pulse-echo systems] Barkhoudarian, S . United States Atomic Energy Commission Report APDA-223 (June 1968) 81 pp (970) Acoustic transducer Barnes, R. P. (Jr) US Patent 3,403,234 (Filed 11 September

(24 September 1964) (971)

1968)

Magnetoelastic pulses in inhomogeneous magnetic field Bar’yakhtar, V. G., Gann, V. V. Fiziki Tverdogo Tela, Vol 10, No 8 (August 1968) pp 2327-2334 (In Russian, English translation in Soviet Physics-Solid State)(Q72) Magnetostriction of paramagnetic rare earth gallates and germanates with garnet structure Belov, K. P., et al Fizika Tverdogo Tela, Vol 10, No 12 (December 1968) pp 3706-3709 (In Russian) (Will appear in English in Soviet PhysicsSolid State in May 1969) (973) On the theory of propagation of transverse sound in superconductors Belozurov, D. P., Daner, E. A. Zhurnal Eksperimentalnoi i Teoreticheskoi Fiziki, Vol 55, No 2 (1968) pp 642-650 (In Russian, English translation in Soviet Physics -JETP) (974) Transducer for angular motion Borner, M. US Patent 3,408,871 (5 November 1968) (Filed in Germany 27 June 1964) (975) High-performance lithium niobate acoustic surface wave transducers and delay lines Collins, J. H., et al Applied Physics Letters, Vol 13, No 9 (1 November 1968) p 312 (976) Guide to vibration monitoring (Part 2) (2 parts) Collum, J. A. Instruments and Control Systems, Vol 41, No 11 (November 1968) p 107 (977) Piezoelectric resonator Curran, D. R., Koneval, IT. J. US Patent 3,401,283 (10 September (Filed 19 April 1965) (978)

140

ULTRASONICS

April

1968)

1969

Mechanically coupled bending and contour shear vibrations of piezoelectric plates Drukker, Yu. M., Gruzinenko, V.B., Yaroslavskii, M. I. Kristallografiya, Vol 13, No 4 (July 1968) pp 714-717 (In Russian, English translation in Soviet Physics-Crystallography) (979) IsostaticalIy hot-pressed sodium-potassium niobate transducer material for ultrasonic devices Egerton, L, Bieling, C. A. American Ceramic Society Bulletin, Vol 47 No 12 (December 1968) pp 1151-1156 (980) Pieaolectric accelerometer Elazov, S. US Patent 3,400,283 (3 September (Filed 14 July 1966) (981)

Propagation of sound in narrow channel in He3-He4 solution Karchava. T. A., Sanikidze, D. G. Zhurnal Eksperimental’noi Teoreticheshoi Fiziki. Vol 55, No 5 (1968) p 1909 (In Russian)

(994) (Continuous wave) Transmission spectrometer for direct detection of nuclear acoustic resonance utilising magnetic field or frequency modulation Melcher, R. L., Bolef, D. I.. Merry, J. B. The Review of Scientific Instruments, Vol 39, No 11 (November 1968) p 1613-1617 (995) Some aspects of electrostatic transducers. (A new analogue network) Merhaut. J. The Radio and Electronic Engineer, Vol 36. No 3 (September 1968) p 175 (996)

1968)

The present and future of ultrasonic imaging Ensminger, D. Battelle Technical Review, Vol 17, No 10 (November-December 1968) pp 3-8 (982) A self compensating crystal oscillator Fewings, D. J., Ince, C. R. S. The Marconi Review. Volume xxxi. No 169. pp 58-78 (983)

On the production of harmonic hypersound (In quartz at 4%) Meriomez, M., Thery. P.. Bridoux, E.. Martin, M. Comptes Rendues de 1’Academie des Sciences (Paris), Series A.B, Vol 267B, No No 22 (25 November 1968) pp 1195-1198 (In French) (997)

Underwater acoustic imaging--preliminary feasibility study Frankel, S. USAEC Report SC-CR 68-3545 (March 1968) 101 pp (984)

Techniques of ultrasonic paramagnetic resonance Meyer, H. C., McDonald, P. F., Donoho. P. L. Review of Optics (France), Vol 39. No 10 (1968) pp 1459-1460 (998)

Ultrasonic vibrator (magnetic) Furuno, K. Japanese Patent JPC 23058/68 (4 October 1968) (Applied for 19 August 1965) (985)

Sensitivity enhancement by the use of acoustic resonators in continuous wave ultrasonic spectroscopy Miller, J. G.. Bolef, D. I. Journal of Applied Physics, Vol 39 No 10 (September 1968) pp 4589-4593 (999)

Excitation of sound of 104MHz in KHaPO, at 4.2% Ganeev, E. G.. Kopvillem, U. Kh., Smolyakov, B. P. Fizika Tverdoga Tela, Vol 10, No 12 (December 1968) p 3701 (In Russian) (Will appear in English in Soviet Physics-Solid State in May 1969) (986) The efficient detection of Korotkoff sounds Geddes, L. A., Moore, A. G. Medical and Biological Engineering, Vol 6, No 6 (November 1968) pp 603-609 (987) Influence of the motion of dislocation on the ultrasonic saturation of the NMR line of cubic crystals. Grichenko Yu. A., Timan, B. L. Soviet Physcis-Solid State, Vol 10, No 4 (October 1968) pp 979-980 (988) Piezoelectricity and elasticity of HIOa and DIO..J Haussiihl, S. Acta Crystallographica, Vol 25, Part 6 (1 November 1968) p 697 (In German, English abstract) (989) Acoustical ing) Halt, D. Spectrum,

holography

(For ultrasonic

imag-

No 57 (1969) pp 8-10 (990)

Generation of acoustic waves in semiconductors by electric field pulses (4.2-77-K) Ivakhno, V. N., Nasledov, D. N. Soviet Physics-Semiconductors, Vol 2, No 8 (February 1969) pp 979-980 (991) Use of color display techniques to enhance sensitivity of the ultrasound camera Jacobs, J. E., Reimann, K. Buss, L. Materials Evaluation, Vol xxvi, No 8 (August 1968) p 155 (992) Excitation of sound by electromagnetic waves on metal surfaces Kaganov, M. I., Fiks, V. B., Shikina, N. I. Fiziki Metallov Metallovedenie, Vol 26, No 1 (July 1968) pp 11-17 (In Russian, English translation in Physics of Metals and Metallography) (993)

A timing device for the measurement of damping capacity of vibrating samples Molyneux, L. Journal of Scientific Instruments (Journal Physics E). Series 2, Vol 1. p 1214 (1000)

of

Deep submergence acoustic transducer array construction McCool, J. M., Shelb, S. F.. US Patent 3.409,896 (5 November 1968) (Filed 21 July 1965) (1001) Pulsed integrating pendulum accelerometer McNeil, J. R. US Patent 3,408.873 (5 November 1968) (Filed 29 March 1965) (1002) Source scanning holography (For ultrasonics) Neeley, V.I. Physics Letters, Vol 28A, No 7 (13 January 1969) pp 475-476 (1003) New magnetostrictive materials and transducers-1 (Paper introduces new design techniques and transducers materials now becoming available; for use in medium and high-intensity ultrasonics (sonar and indus trial processing)) Neppiras, E. A. Journal of Sound and Vibration, Vol 8, NO 3 (November 1968) pp 408-430 (1004) New magnetrostrictive materials and transducers-II (Results obtained for magnetization and electrical measurements and measurements of fundamental constants, for types of transducer that are actually used in industrial ultrasonics ie not ‘idealized’ types chosen for convenience in obtaining type of measurement sought) Neppiras, E. A. Journal of Sound and Vibration, Vol 8. No 3 (November 1968) pp 431-456 (1005) Piezo-electric porcelain Nippon Denki Japanese Patent JPC 103/69 (7 January (Applied for 25 August 1965) (1006)

1969)