1
Q
Crystal
A
Crystals are the “heart” of a Transducer and can be made of different Piezoelectric Materials
2
Q
Natural Crystals
A
- Quarts
- Lithium Sulfate
3
Q
Polarized/Man-made Crystals
A
- Barium Titanate
- Lead Metaniobate
- Lead Zirconate
- Lead Zirconate Titanate
4
Q
Quarts Crystal are…
A
- Popular in past not anymore
- Stable chemically, electrically, thermally
- Insoluble
- Wear resistant
- Not efficient
5
Q
X-Cut Crystals
A
- Produce Longitudinal Waves (Compression)
- Most Common
- Cuts perpendicular to the X-axis
6
Q
Y-Cut Crystals
A
- Produce Transverse Waves (Shear)
- Rare
- Wave won’t pass through a liquid Couplant
- Must be bonded/glued to a part
7
Q
Litium Sulfate Crystal
A
- Efficient receiver
- Fragile
- Soluble
8
Q
What are some Polarized Ceramics/Man-made Crystals benefits?
A
- Efficient vibration generators
- Moisture resistant
- High temp operation
- Fragile
- Less efficient with age
Ultrasonics
flashcards
Decks in class (31)
# Cards
-
Basics (1)3
-
Modes of Propagation/Waves (1)4
-
Terms (1)14
-
Stats (1)9
-
Formulae (1)17
-
Everything Couplant (1)3
-
Crystals (2)8
-
Terms (2)19
-
Construction of a Transducer/Probe (2)8
-
Formulae (2)3
-
Types of Transducers (2)12
-
Construction of the Digital Ultrasonic Instrument (2)6
-
Construction of the Cathode-Ray Tube CRT (2)5
-
Controls on a Digital Display (2)13
-
Pulse-Echo (2)7
-
Calibration (2)3
-
Types of Resolution (2)3
-
Reference Blocks (2)13
-
Mode Conversion (3)8
-
Use of Waves (3)6
-
The Sound Beam (4)11
-
Formulae (4)4
-
Attenuation (4)11
-
Testing Methods (5)23
-
Immersion Testing (5)16
-
Resonance (5)11
-
Formulae (5)2
-
Ultrasonic Displays (5)5
-
New Ultrasonic Technology (5)7
-
Variables Impacting Ultrasonic Tests (7)4
-
Equipment Variables (7)7
