Search RFC: |                                     
Please support my efforts by advertising!
About | Sitemap | Homepage Archive
Serving a Pleasant Blend of Yesterday, Today, and Tomorrow™
Vintage Magazines
Electronics World
Popular Electronics
Radio & TV News
QST | Pop Science
Popular Mechanics
Radio-Craft
Radio-Electronics
Short Wave Craft
Electronics | OFA
Saturday Eve Post
Please Support My Advertisers!

Aegis Power | Centric RF | RFCT
Alliance Test | Empower RF
Isotec | Reactel | SF Circuits

Formulas & Data

Electronics | RF
Mathematics
Mechanics | Physics


Calvin & Phineas

Resources

Articles, Forums, Radar
Magazines, Museum
Radio Service Data
Software, Videos


Artificial Intelligence

Entertainment

Crosswords, Humor Cogitations, Podcast
Quotes, Quizzes

Parts & Services

1000s of Listings

        Software:

Please DONATE

RF Cascade Workbook | RF Symbols for Office
RF Symbols for Visio | RF Stencils for Visio
Espresso Engineering WorkbookCafe Press
everythingRF RF & Microwave Parts Database (h1)

Piezoelectric Foam
Kirt's Cogitations™ #3

RF Cafe University"Factoids," "Kirt's Cogitations," and "Tech Topics Smorgasbord" are all manifestations of my ranting on various subjects relevant (usually) to the overall RF Cafe theme. All may be accessed on these pages:

 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37

< Previous                      Next >

 

Piezoelectric Foam

Piezoelectric foam? Researchers have discovered that polypropylene foam (used widely in packaging) acquires piezoelectric properties after it is zapped with several thousand volts. Air in the pores break down into electrons and positively charged ions that cling to opposite walls of the cavities. It is already being used in keypads and musical instrument pickups. Future applications include conformable ultrasound arrays for medical instrumentation and even embedded ultrasonic "bar code" type configurations built into products for security and identification. The only drawback that needs to be overcome is the material loses its piezoelectric properties above 55° C.

everythingRF RF & Microwave Parts Database (h1)