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
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

Questions?  Contact us to discuss your particular application.