Semiconductor Thermal Mechanical Wear Resistant Fluid Handling Electronic FG-995 | Fine Grain Alumina 99.5% | Al2O3

FG-995 Fine-Grain Alumina Material Properties
   Trade Name    FG-995
   Composition    Nominal 98.5% Al2O3
   Color    White

   Property Units Test Value
   Density gm/cc ASTM-C20 3.8
   Crystal Size Microns Thin-Section 6
   Water Absorption % ASTM-373 0
   Gas Permeability 0
   Flexural Strength (MOR), 20 degrees C -- -- 375 (54)
   Elastic Modulus, 20 degrees C GPa (psi x 106) ASTM-F417 350 (51)
   Poisson's Ratio, 20 degrees C -- ASTM-C848 0.22
   Compressive Strenght MPa(psi x 103) ASTM-C773 2500 (363)
   Hardness GPa(kg/mm2) KNOOP 1000 gm 13.7 (1400)
    Rockwell 45 N 82
   Tensile Strength, 25 degrees C MPa (psi x 103) ACMA TEST #4 248 (36)
   Fracture Toughness K(Ic) Mpa m1/2 NOTCHED BEAM 4-5
   Thermal Conductivity, 20 degrees C Wm degrees K ASTM-C408 27.5
   Coefficient of Thermal Expansion, 25-1000 degrees C 1 x 10-6/degrees C ASTM-C372 8.2
   Specific Heat, 100 degrees C J/kg*K ASTM-E1269 880
   Thermal Shock Resistance, (delta)Tc degrees C NOTE 3 200
   Maximum Use Temperature degrees C NO-LOAD COND. 1700
   Dielectric Stength ac-kV/mm (acV/mil) ASTM-D116 8.7 (220)
   Dielectric Constant, 1MHz 25 degrees C ASTM-D150 9.6
   Dielectric Loss (tan delta) 1MHz 25 degrees C ASTM-D2520 0.0002
   Volume Resistivity 25 degrees C ohm-cm ASTM-D1829 >1014
500 degrees C ohm-cm ASTM-D1829 2 x 1010
1000 degrees C ohm-cm ASTM-D1829 2 x 106
   Impingement -- Note 4 0.48
   Rubbing -- Note 4 --

This chart is intended to illustrate typical properties of advanced ceramic materials available from CoorsTek. The designer should recognize that exact properties may vary according to product configuration and can sometimes be tailored to meet specific requirements.

Contact CoorsTek for cost-effective design, development and manufacturing assistance. The information set forth herein is offered for comparison only, and is not to be construed as absolute engineering data or constituting a warranty or representation for which we assume legal responsibility.

Note 1: Data Measurements -- All data measurements are typical and made at room temperature unless otherwise noted.

Note 2: Composition Control -- All CoorsTek ceramic compositions are controlled using modern chemical spectrographic and x-ray fluorescent methods.

Note 3: Thermal shock resistance -- Test are run by quenching samples into water from various elevated temperatures. The change in temperature where a sharp decrease in flexural strength is observed is listed as (delta)Tc.

Note 4: Wear resistance -- Impingement tests are run by using a dry 240 grit fused alumina abrasive. The indices in the chart are calculated by dividing the material volume loss by the volume loss of an AD-85 alumina control. The lower in the index, the better the wear resistance.

*Ceramic property values vary somewhat with method of manufacture, size, and shape of part. Close control of values of most properties can be maintained if specified.
fg-995 | fine grain alumina 99.5% | al2o3

 

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