Alumina Wear Plates
Boston Piezo-Optics offers a wide range of sizes and thicknesses in wear plates used to protect the crystals of transducer assemblies from corrosion, sliding abrasion, or high temperatures. All wear plates are manufactured to specification.
General Specifications
| Material | Diameter | Thickness | Surface | Flatness | Parallelism | Electrodes |
|---|---|---|---|---|---|---|
| 94% Pink Alumina Oxide | 0.060" - 1.250" | 0.003" - 0.020" | 3 micron fine lapped | To within 0.0001" per 0.500" of diameter | To within 0.0002" per 0.500" of diameter | Fired Palladium/silver or Fired Gold upon special request |
Other sizes and thicknesses are available.
Material Characteristics
| Characteristic | |
|---|---|
| Moh's Hardness | 9+ |
| Density | 3.72 g/cm3 |
| Young's Modulus | 4.6 x 107 PSI |
| Modulus of Rigidity | 1.9 x 107 PSI |
| Ultrasound Transit Time, Through thickness of: |
0.005" = 1.29 x 10-8 sec 0.010" = 2.68 x 10-8 sec 0.020" = 5.17 x 10-8 sec |
