APC International, LtdElectrifying News

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Issue 5.41

How to Determine the Resonance Frequency for Piezo Ceramics

  

When exposed to an AC electric field, a piezoelectric ceramic element changes dimensions cyclically, at the cycling frequency of the field. The frequency at which the ceramic element vibrates most readily, and most efficiently converts the electrical energy input into mechanical energy, is the resonance frequency.

 

The pattern of an element's responses is depicted in the figure to the right. As the frequency of cycling is increased, the element's oscillations first approach a frequency at which impedance is minimum (maximum admittance). This minimum impedance frequency, fm, approximates the series resonance frequency, fs, the frequency at which impedance in an electrical circuit describing the element is zero, if resistance caused by mechanical losses is ignored. The minimum impedance frequency also is the resonance frequency, fr. The composition of the ceramic material and the shape and volume of the element determine the resonance frequency. Generally, a thicker element has a lower resonance frequency than a thinner element of the same shape.

 

For more information about determining the resonance frequency of your piezo ceramics or if you have any other technical questions related to the application of piezoelectric ceramics, contact a member of our knowledgeable sales staff!

 
  
  
  
  
  
  
  
  
  
  
  
  
Figure 1.8
Figure 1.8 Impedance as
a function of frequency

 


    

Only Need a Few Piezo Ceramics for a New Project?

 

If you are starting a new project and need a couple of standard piezo ceramics to test then look no further than APC's sale ceramics. They are discounted and available for quick delivery!

 

Available sale ceramic categories include:

  • Piezo ceramic shapes (discs, plates, rings)
  • Stripe Actuators
  • Disc Benders (Unimorphs)
  • Air Transducers

If you wish to place an order for sale ceramics, submit a quote here.

 

Have more questions or need something specific, contact any APC Sales Representative to discuss your needs!

  
  
  
  
  
  
        
  

Ultrasonic Nebulizers (Fluid Atomizers)

APC offers ultrasonic nebulizer boards and component parts, plus custom design nebulizers.
 
Ultrasonic nebulizers or fluid atomizers supplied from APC International feature:
  • RoHS compliance
  • OEM electronic board and piezo elements
  • High mist output
  • ~10,000 hour PZT ceramic lifetime
  • Stainless steel face
  • Compact

 Typical applications for piezo nebulizer boards include:

  • Humidifiers or climate control
  • Mist and fog producers
  • Fountains
  • Water Statuary
  • Indoor ponds

If interested in purchasing APC's ultrasonic nebulizers submit a request for quote here.

 

If you need a nebulizer custom built to meet your unique requirements, please contact any APC Sales Representative to discuss you needs.

 

 

 

Nebulizers

Nebulizer Boards 


The 5th International Congress on Ceramics (ICC5)

 

When: August 17-21, 2014

 

Where:

Beijing International Convention Center

Beijing, China

 

Event Info: 

The International Ceramic Federation (ICF) convenes the International Congress on Ceramics (ICC) every two years in cooperation with the ICF member societies. During the congress, global business and technology leaders, scientists and researchers gather to share ideas and visions of the future for ceramics and inorganic materials, and to engage the worldwide ceramics community in a collective effort to expand the use of these materials in both conventional as well as new and exciting applications.

 

More Event Details 

 

  
  
  
              
 

The 4th Focused Ultrasound International Symposium

 

When: October 12-16, 2014

 

Where:

Bethesda North Marriott Hotel & Conference Center

Washington D.C. Metropolitan Area.

 

Event Info: 

Organized by the Focused Ultrasound Foundation, the symposium will spotlight leading edge preclinical, translational and clinical research related to one of today's most promising and innovative therapeutic technologies.

Targeted to scientists, clinicians, and others interested in current and future applications of focused ultrasound, the conference will offer a multifaceted exploration of this emerging field and feature plenary sessions, panel discussions, poster presentations and technical exhibits.

 

 

More Event Details