ch@well.UUCP (03/07/87)
[.]
Hello,
I am looking for a source of piezoelectric "sheets". I have heard
that several companies make/sell it, but I can't seem to find any
references.
What this is is a sheet (ranging from small to several square feet) of
thin, semi-flexible, piezoelectric material coated on both sides by
thin electrodes.
I believe that there is a company in the Silicon Valley area
that sells the sheeting as well as a line of high-frequency speakers
based on the material.
Can anyone please help me find a source?
Thanks in advance,
Chris Hayes
--
Chris Hayes
UUCP: ucbvax!dual!well!ch
OR : {hplabs, ptsfa, lll-lcc}!well!chjpexg@mit-hermes.AI.MIT.EDU (John Purbrick) (03/08/87)
In article <2723@well.UUCP>, ch@well.UUCP (Chris Hayes) writes: > I am looking for a source of piezoelectric "sheets". I have heard > that several companies make/sell it, but I can't seem to find any > references. > Can anyone please help me find a source? > Chris Hayes What you want is poly-vynilideine fluoride film (spelling not guaranteed), commonly called PVDF. One manufacturer is the Pennwalt Corporation, based in King Of Prussia, Pa. It comes in all kinds of thicknesses, and gives an electrical response to force and temperature changes.
lary@tekecs.TEK.COM (Richard Lary) (03/09/87)
In article <2723@well.UUCP> ch@well.UUCP (Chris Hayes) writes: > >I am looking for a source of piezoelectric "sheets". I have heard >that several companies make/sell it, but I can't seem to find any >references. > >What this is is a sheet (ranging from small to several square feet) of >thin, semi-flexible, piezoelectric material coated on both sides by >thin electrodes. > One company that manufactures and sells the material you are looking for is Pennwalt Corporation, their address is: Pennwalt Corp. Kynar Piezo Film Group Dept. G 900 First Ave. King of Prussia, PA 19406 (215)337-6710 For about $50.00 they sell an evaluation kit complete with piezoelectric film and application notes. Have Fun, -- Richard A. Lary, Tektronix, Inc. 503-685-2968 Graphic Workstations Division PO Box 1000, MS 60-405, Wilsonville, OR 97070 ...tektronix!tekecs!lary
commgrp@silver.bacs.indiana.edu (03/10/87)
KYNAR (tm) piezoelectric film is manufactured by KYNAR Piezo Film Group Pennwalt Corporation 900 First Avenue King of Prussia, PA 19406 ph: (215) 337-6710 An experimenter's kit is available for $45, which contains 4" x 5" and 1" x 3" samples of piezo film, connectors, a book describing its physics, instructions for five experiments, and price list. It costs 18 to 75 cents per square centimeter, depending on thicknes. Several asortments are available. It looks like "space blanket." The plastic film is coated with aluminum (other metals available), to which connections are made. Both pieces emit loud sound when connected to a laboratory signal-generator at 10 kHz; low-frequency response requires coupling to mechanical resonators. I've heard that this stuff was "top secret" for a time because of its military sonar applications. It "exhibits the highest piezo and pyroelectric activity of any known polymer... converts pressure into electrical signal, voltage proportional to the stress applied. Conversely, it transforms an electrical signal into mechanical motion. It's dimensional change...makes it useful...as speakers. ...Piezo film is also pyroelectric, converting thermal energy into electricity...so sensitive that it can detect heat from the human body up to 50 feet away." See article in SENSORS magazine, May 1986. I've also seen references to piezo film being used as touch-sensors in robotics. Frank Reid PO Box 5283 Bloomington, IN 47402 reid@gold.bacs.indiana.edu