[ Ultrasonic Transducer Workshop ]
[ Follow Ups ] [ Post Followup ] [ Help ]

To all: Is there any disadvantage for composite transducers?

Posted by: Rolf D. , E-mail: rd@ultrasonic.de, on September 21, 1996 at 13:29:08:

  • The great advantages which were pointed out in articles from G. Fleury [1]
    and G. Splitt [2] lead to the conclusion,
    to use only composite transducers from now on, is this right?

  • In particularly, is there any figure of the following
    table which result also in disadvantages.

    comparison: lead zirco-titanate PZT ---> 1-3 composite
    acoustical impedance (Mray): 30-32 ---> 8-12
    coupling coefficient: 0.45 ---> 0.5-0.7
    dielectrical constant: 250-2000 ---> 200-600
    density (g/cm3): 7.8 ---> 3.5-4

  • Is that design available for any frequencies,
    and is this design beneficially for any frequencies?

  • Is that kind of transducer more expensive,
    and how much does it share with the total transducer market?

    That are of course a lot of questions.
    I would appreciate if other experts will give their comments as well,
    however let us first wait for Mr. Fleury's answer.

    Thanks

    Rolf D.


    Ref 1:
    IMPROVEMENTS OF ULTRASONIC INSPECTIONS THROUGH THE USE OF
    PIEZO-COMPOSITE TRANSDUCERS    ]
    Ref 2:
    Transducers with Piezo Composite - a milestone for Ultrasonic Testing


    Follow Ups:


    Post a Followup:

    Name:
    E-Mail:

    Subject:

    Comments:

    Optional Link URL: Example: "http://www....html". Alternative write "http://www.ultrasonic.de/wshop/attach/filename.htm" if you transfered a filename.htm via FTP
    Link Title: is important! Information on my Home Page
    Optional Image URL: http://www....gif

    [ Ultrasonic Transducer Workshop ] [ Help ]