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Rulon Bearings

CoorsTek TTZ (Dura-Z™) MgO Partially Stabilized Zirconia
Categories: Ceramic; Oxide; Zirconium Oxide

Material Notes: Thermal Shock Delta Tc = 350°C - Thermal shock tests are performed by quenching samples in water from different elevated temperatures. Delta Tc is the change in temperature which results in a sharp decrease in the flexural strength of the sample.

Data Provided by the manufacturer, Coors Ceramics Co.

Key Words: Zirconium Oxide
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Physical PropertiesMetricEnglishComments
Density 5.72 g/cc0.207 lb/in³ASTM C20
Water Absorption 0.00 %0.00 %ASTM C373
Particle Size 35 µm35 µmAverage Crystal Size - Thin Section Test
 
Mechanical PropertiesMetricEnglishComments
Knoop Microhardness 11.811.81000 g load
Hardness, Rockwell 45 N 7777GPa
Tensile Strength, Ultimate 352 MPa51100 psiACMA Test #4
Modulus of Elasticity 200 GPa29000 ksiASTM C848
Flexural Strength 620 MPa89900 psiASTM F417
Compressive Strength 1750 MPa254000 psiASTM C773
Poissons Ratio 0.300.30ASTM C848
Fracture Toughness 11.0 MPa-m½10.0 ksi-in½Notched Beam
Shear Modulus 77.0 GPa11200 ksiCalculated
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity >= 1.00e+13 ohm-cm>= 1.00e+13 ohm-cmASTM D1829
 <= 100 ohm-cm
@Temperature 1000 °C
<= 100 ohm-cm
@Temperature 1830 °F
ASTM D1829
 50000 ohm-cm
@Temperature 500 °C
50000 ohm-cm
@Temperature 932 °F
ASTM D1829
Dielectric Constant 28
@Frequency 1e+6 Hz
28
@Frequency 1e+6 Hz
Dielectric Strength 9.40 kV/mm239 kV/inac; ASTM D116
Dielectric Loss Index 0.0010
@Frequency 1e+6 Hz
0.0010
@Frequency 1e+6 Hz
ASTM D2520
 
Thermal PropertiesMetricEnglishComments
CTE, linear 10.1 µm/m-°C
@Temperature 25.0 - 1000 °C
5.61 µin/in-°F
@Temperature 77.0 - 1830 °F
ASTM C372
Specific Heat Capacity 0.600 J/g-°C0.143 BTU/lb-°FASTM E1269
Thermal Conductivity 2.20 W/m-K15.3 BTU-in/hr-ft²-°FASTM C408
Maximum Service Temperature, Air 500 °C932 °FNo Load
 
Descriptive Properties
ColorIvory

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