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MFC

Fiber Composites

 

 

 

 

 

 

 

 

Smart Material is manufacturing 1-3 composites using piezo ceramic fibers as active rods.
1-3 fiber piezo composites are prepared by epoxy infiltration of fiber bundles and dicing of the cube-shaped blocks perpendicular to the direction of the fibers. This patented method is also called Arrange & Fill* as outlined in the schematic below.

 

Using piezo ceramic fibers with 105µm, 250µm and 800µm diameters yields fill factors of approx. 35%, 65% and 80% in a random distributed cross section.

 

1-3 Random Fiber Composite specifications:

Resonance
Frequencies		 40kHz up to 10MHz
Available Fill Factors, approx. 35% (105µm fibers),
65% (250µm fiber),
80% (800µm fiber)
Acoustic Impedance ~ 14 to 24MRayl
Typical coupling coefficient kt ~0.65
PZT materials Navy type II and VI, SP505 and SP53
Maximum Dimensions

6cm by 6cm (2.36" by 2.36"), typical sizes

60mm by 60mm,

50mm by 50mm,
30mm by 30mm
Operational Temp. typical 100°C, maximum available 130°C
Interstitial Material various Epoxy systems,
Polyurethane on request
Available Electrodes Au, CuSn (Std.), AgAu

 

 

The random fiber composite material shows superior properties for ultrasound transduction, which is due to reduced acoustic impedance and high coupling factor. Additionally 1-3 fiber composites with random element distribution yield an increased spurious mode suppression due to the random spacing.

 

Various 1-3 Fiber Due to the Arrange&Fill production method the raw 1-3 fiber composite material are typical blocks of up to 10cm length and the lateral dimensions of the targeted element. It also allows to machine 1-3 composites into various shapes and forms, in addition to slicing elements with the desired resonance frequency of the raw fiber block


Plano-Concave This includes precise concave or convex contours for superior broadband ultrasound receiver applications.

 

 

 

The Arrange&Fill production method is easily scaleable for volume quantities which also allows for short lead time, a major advantage over the commonly used Dice&Fill methods.

 

 

1-3 Random Fiber Composite typical applications:

  • Non Destructive Testing (NDT) ultrasound transducer
  • SONAR, single element
  • Flow control
  • Air ultrasound transducer

 

Spectrum 13CRAnd

 

 

Arrange_Fill

 

MFC Patent

13CompositeSelector 13 Standard DiceFill 13 Regular Fiber Composite

 

PZT Navy Type II

PZT 5A1, SP505

PZT Navy Type VI

PZT 5H2, SP53

Fiber Fill Factor Dimensions Frequency Availability
105µm 35% 30 x 30mm² 3 to 10MHz standard
  40 x 40mm² 3 to 10MHz standard
50 x 50mm² 3 to 6MHz standard
60 x 60mm² 3 to 5MHz standard
 
250µm 35% 40 x 40mm² 200kHz to 5MHz request
  50 x 50mm² 200kHz to 5MHz request
60 x 60mm² 200kHz to 5MHz request
250µm 65% 40 x 40mm² 200kHz to 5MHz standard
  50 x 50mm² 200kHz to 5MHz standard
60 x 60mm² 200kHz to 5MHz standard
 
800µm 80% 40 x 40mm² 40kHz to 1MHz request
  50 x 50mm² 40kHz to 1MHz standard
60 x 60mm² 40kHz to 1MHz request
Fiber Fill Factor Dimensions Frequency Availability
105µm 35% 30 x 30mm² 3 to 10MHz request
  40 x 40mm² 3 to 10MHz request
50 x 50mm² 3 to 6MHz standard
60 x 60mm² 3 to 5MHz standard
 
250µm 35% 40 x 40mm² 200kHz to 5MHz request
  50 x 50mm² 200kHz to 5MHz request
60 x 60mm² 200kHz to 5MHz request
250µm 65% 40 x 40mm² 200kHz to 5MHz request
  50 x 50mm² 200kHz to 5MHz standard
60 x 60mm² 200kHz to 5MHz standard
 
800µm 80% 40 x 40mm² 40kHz to 1MHz request
  50 x 50mm² 40kHz to 1MHz standard
60 x 60mm² 40kHz to 1MHz request

Bottompic

Standard: Normal delivery time 1-3 weeks.
Request:

Custom order, normal delivery time 5 weeks,

minimum quantities apply
Frequency: Resonance Frequency, tolerance ± 10%, ± 5% on request
Standard Electrode Material:

CuSn (copper, tin-flash) for all frequencies < 5MHz,

Au (gold) for frequencies above 5MHz or on request

Mechanical

Tolerances:

for dimensions < 6mm: ± 0.1mm

for dimensions < 30mm: ± 0.2mm

for dimensions > 30mm: ± 0.3mm

 

Round sizes are available based on the Diameter Table below. For all round sizes a minimum quantity applies, normal delivery time is Availability + 2 weeks.

 

Available Diameters
Diameter mm Diameter inch Diameter mm Diameter inch
 
3.18 mm 0.125 '' 12.70 mm 0.500 ''
5.12 mm 0.202 '' 14.20 mm 0.559 ''
5.18 mm 0.204 '' 15.90 mm 0.626 ''
5.68 mm 0.224 '' 17.50 mm 0.689 ''
6.00 mm 0.236 '' 18.00 mm 0.709 ''
6.50 mm 0.256 '' 19.05 mm 0.750 ''
8.20 mm 0.323 '' 20.00 mm 0.787 ''
9.00 mm 0.354 '' 24.00 mm 0.945 ''
9.50 mm 0.374 '' 25.50 mm 1.004 ''
10.00 mm 0.394 '' 30.00 mm 1.181 ''
10.20 mm 0.402 '' 38.00 mm 1.496 ''
12.00 mm 0.472 ''    
       

 

Standard inventory item

approx. 1-3 weeks delivery

Custom order, approx. 5 weeks delivery

Minimum quantities apply

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