Materials Properties Chart

AccumetsMaterialPropertiesChart
[ Download/View File ]

Properties Units Test 99.5% Alumina 99.6% Alumina Aluminum Nitride K170
Chemical Formula     Al2O3 Al2O3 AlN
Density g/cm3 ASTM C20 3.7 – 3.97 3.87 3.28
Color     White White Tan / Gray
Crystal Structure     Hexagonal Hexagonal Hexagonal
Water Absorption % @ R.T. ASTM C373 0.0 0.0 0.0
Hardness Moh’s   9    
Hardness Rockwell     87  
Hardness knoop kg/mm2 Knoop 100G 2000   1200
Compressive Strength MPa @ R.T. ASTM C773 2070 – 2620    
Compressive Strength M(106) lbs/in2     54  
Tensile Strength MPa @ R.T. ACMA Test #4 260-300    
Elastic Modulus 106psi ASTM C848   54  
Modulus Of Elasticity

(Young’s Mod.)

 Gpa ASTM C848 394   320
Flexural Strength K(103) lbs/in2     90 59 (4pt.bend)
Flexural Strength

(MOR)

 MPa @ R.T. ASTM F417 310 – 379    
Poisson’s Ratio   ASTM C818 0.27    
Poisson’s Ratio - ASTM C848   0.20 0.24
Fracture Toughness MPa @ m1/2 Notched beam Test 4.5   3.5
Max use Temperature

(* denotes inert atm)

 oC No Load Cond. 1750   1600
Thermal Shock Resistance DT (0C) Quenching 200    
Thermal Conductivity W/m-K @ R.T. ASTM C408 35 27 170
Coefficient of Linear Thermal Expansion 10-6/0C ASTM C372   7.0 – 8.3 (25-10000C) 4.6 25-300 0C
Coefficient of Linear Thermal Expansion mm/m-0C (-250C through £ 10000C) ASTM C372 8.4    
Specific Heat Cal/g-0C @ R.T. ASTM C351 0.21    
Dielectric Constant 1MHz @ R.T. ASTM D150 9.6 9.9±..1 8.6
Dielectric Strength (60 cycles AC avg. RMS) .025 Thick .050 Thick Volts/mil ASTM D149   600 450  
Dielectric Strength kV/mm ASTM D116 15   14
Electrical Resistivity Wcm @ R.T. ASTM D1829 >1014 >1014 1013




Properties Units Test Aluminum Nitride Beryllia Oxide Cordierite
Chemical Formula     AlN BeO 2MgO-2Al2O3-5SiO2
Density g/cm3 ASTM C20 3.25 2.85 2.60
Color     Tan / Gray White Tan
Crystal Structure     Hexagonal   Orthorhombic
Water Absorption % @ R.T. ASTM C373 0.0   0.02 – 3.2
Hardness Moh’s   5   7
Hardness Rockwell     45  
Hardness knoop kg/mm2 Knoop 100G 1170   _______
Compressive Strength MPa @ R.T. ASTM C773 2068 225k psi Astm c 773-74 350
Compressive Strength M(106) lbs/in2        
Tensile Strength MPa @ R.T. ACMA Test #4 _______ 225K psi Astm c-565-71 25.5
Elastic Modulus 106psi ASTM C848      
Modulus Of Elasticity

(Young’s Mod.)

 Gpa ASTM C848 308 M 106 lbs/in2

50

 70
Flexural Strength K(103) lbs/in2     35 (3pt.bend)  
Flexural Strength

(MOR)

 MPa @ R.T. ASTM F417 428   117
Poisson’s Ratio   ASTM C818 0.25 0.26 Astm C-565-71 0.21
Poisson’s Ratio - ASTM C848      
Fracture Toughness MPa @ m1/2 Notched beam Test 3.5   ______
Max use Temperature

(* denotes inert atm)

 oC No Load Cond. 1600   1371
Thermal Shock Resistance DT (0C) Quenching 400 >1500 500
Thermal Conductivity W/m-K @ R.T. ASTM C408 82.3 270 3.0
Coefficient of Linear Thermal Expansion 10-6/0C ASTM C372   9.0 25-10000C  
Coefficient of Linear Thermal Expansion mm/m-0C (-250C through £ 10000C) ASTM C372 4.6 – 5.7   1.7
Specific Heat Cal/g-0C @ R.T. ASTM C351 0.25   0.35
Dielectric Constant 1MHz @ R.T. ASTM D150 8.0 – 9.1 6.5 4.7
Dielectric Strength (60 cycles AC avg. RMS) .025 Thick .050 Thick Volts/mil ASTM D149      
Dielectric Strength kV/mm ASTM D116 15   5.11
Electrical Resistivity Wcm @ R.T. ASTM D1829 >1014 1015 ohm-cm 1014




Properties Units Test Graphite Lava,

Grade A

 Corning Macor
Chemical Formula     C Al2(Si4O10)-(OH)2 Glass Ceramic
Density g/cm3 ASTM C20 2.25 2.30 2.52
Color     Black Pink White
Crystal Structure     Hexagonal Random Random
Water Absorption % @ R.T. ASTM C373 0.5 – 3.0 2.5 0.0
Hardness Moh’s   1.0 – 1.5 6 4.5
Hardness Rockwell        
Hardness knoop kg/mm2 Knoop 100G ________ 500 250
Compressive Strength MPa @ R.T. ASTM C773 96 172.5 345
Compressive Strength M(106) lbs/in2        
Tensile Strength MPa @ R.T. ACMA Test #4 4.8 20.7 90
Elastic Modulus 106psi ASTM C848      
Modulus Of Elasticity

(Young’s Mod.)

 Gpa ASTM C848 4.8 _______ 66.9
Flexural Strength K(103) lbs/in2        
Flexural Strength

(MOR)

 MPa @ R.T. ASTM F417 50 69 94
Poisson’s Ratio   ASTM C818 _______ ______ 0.29
Poisson’s Ratio - ASTM C848      
Fracture Toughness MPa @ m1/2 Notched beam Test ________ _______ 1.53
Max use Temperature

(* denotes inert atm)

 oC No Load Cond. 3650* 1150 1000
Thermal Shock Resistance DT (0C) Quenching 200 – 250 _____ 25 – 100
Thermal Conductivity W/m-K @ R.T. ASTM C408 24 1.98 1.46
Coefficient of Linear Thermal Expansion 10-6/0C ASTM C372      
Coefficient of Linear Thermal Expansion mm/m-0C (-250C through £ 10000C) ASTM C372 8.39 3.6 6.3 – 9.7
Specific Heat Cal/g-0C @ R.T. ASTM C351 0.16 0.20 0.19
Dielectric Constant 1MHz @ R.T. ASTM D150 _______ 5.3 6.03
Dielectric Strength (60 cycles AC avg. RMS) .025 Thick .050 Thick Volts/mil ASTM D149      
Dielectric Strength kV/mm ASTM D116 ________ 0.1 40
Electrical Resistivity Wcm @ R.T. ASTM D1829 7 x 10-3 1014 >1017




Properties Units Test

Mullite

 Corning Pyrex (7740) Fused Silica Dynasil 4000
Chemical Formula     3Al2O3-SiO2 Borosilicate Glass SiO2
Density g/cm3 ASTM C20 2.80 2.23 2.20
Color     Tan White/ Transparent White/ Transparent
Crystal Structure     Orthorhombic Random  
Water Absorption % @ R.T. ASTM C373 0.0 0.0 0.0
Hardness Moh’s   8 ——— 7
Hardness Rockwell       600 kg/mm2
Hardness knoop kg/mm2 Knoop 100G 1450 418  
Compressive Strength MPa @ R.T. ASTM C773 551 N/A  
Compressive Strength M(106) lbs/in2       (103) lbs/in 161
Tensile Strength MPa @ R.T. ACMA Test #4 103.5 N/A  
Elastic Modulus 106psi ASTM C848      
Modulus Of Elasticity

(Young’s Mod.)

 Gpa ASTM C848 150 64 745 x 103 kg/cm2
Flexural Strength K(103) lbs/in2       25
Flexural Strength

(MOR)

 MPa @ R.T. ASTM F417 170 69  
Poisson’s Ratio   ASTM C818 0.25 0.20 0.17
Poisson’s Ratio - ASTM C848      
Fracture Toughness MPa @ m1/2 Notched beam Test 2.0 0.77  
Max use Temperature

(* denotes inert atm)

 oC No Load Cond. 1700 490 1200
Thermal Shock Resistance DT (0C) Quenching 300 100  
Thermal Conductivity W/m-K @ R.T. ASTM C408 3.5 1.1  
Coefficient of Linear Thermal Expansion 10-6/0C ASTM C372     0.55 20-3200C
Coefficient of Linear Thermal Expansion mm/m-0C (-250C through £ 10000C) ASTM C372 5.3 3.25 Through 3000C  
Specific Heat Cal/g-0C @ R.T. ASTM C351 0.23 0.18 0.177
Dielectric Constant 1MHz @ R.T. ASTM D150 6.0 4.6 3.826
Dielectric Strength (60 cycles AC avg. RMS) .025 Thick .050 Thick Volts/mil ASTM D149      
Dielectric Strength kV/mm ASTM D116 9.8 0.5 5000c (150-200) kv/cm
Electrical Resistivity Wcm @ R.T. ASTM D1829 1013 8 x 1010  




Properties Units Test Quartz GE 124 Sapphire Silicon
Chemical Formula     SiO2 a-Al2O3 Si
Density g/cm3 ASTM C20 2.21 3.97 2.33
Color     White/ Transparent White/ Transparent Gray
Crystal Structure     Hexagonal Trigonal Cubic
Water Absorption % @ R.T. ASTM C373 0.0 0.0 0.0
Hardness Moh’s   7 9 7
Hardness Rockwell        
Hardness knoop kg/mm2 Knoop 100G >600 2200 1150
Compressive Strength MPa @ R.T. ASTM C773 650 – 1100 2000 120
Compressive Strength M(106) lbs/in2        
Tensile Strength MPa @ R.T. ACMA Test #4 48 250 – 400 113
Elastic Modulus 106psi ASTM C848      
Modulus Of Elasticity

(Young’s Mod.)

 Gpa ASTM C848 70 250 – 400 112
Flexural Strength K(103) lbs/in2        
Flexural Strength

(MOR)

 MPa @ R.T. ASTM F417 80 760 – 1035 ~300
Poisson’s Ratio   ASTM C818 0.17 0.29 0.28
Poisson’s Ratio - ASTM C848      
Fracture Toughness MPa @ m1/2 Notched beam Test ______ 1.89 3.0 – 6.0
Max use Temperature

(* denotes inert atm)

 oC No Load Cond. 1200 ~2000 1350
Thermal Shock Resistance DT (0C) Quenching >1400 200 ____
Thermal Conductivity W/m-K @ R.T. ASTM C408 1.4 40 125
Coefficient of Linear Thermal Expansion 10-6/0C ASTM C372      
Coefficient of Linear Thermal Expansion mm/m-0C (-250C through £ 10000C) ASTM C372 0.45 7.9 – 8.8 2.49 – 4.44
Specific Heat Cal/g-0C @ R.T. ASTM C351 0.16 0.18 0.18
Dielectric Constant 1MHz @ R.T. ASTM D150 3.8 9.3 – 11.4 11.8
Dielectric Strength (60 cycles AC avg. RMS) .025 Thick .050 Thick Volts/mil ASTM D149      
Dielectric Strength kV/mm ASTM D116 25 – 40 15 – 50 ____
Electrical Resistivity Wcm @ R.T. ASTM D1829 6 x 1010 1017 10-3




Properties Units Test Silicon Carbide Silicon Nitride Hot Pressed Steatite L-5
Chemical Formula     a-SiC Si3N4 H2Mg3-(SiO3)4
Density g/cm3 ASTM C20 3.21 3.31 2.71
Color     Dark Gray Dark Gray Buff
Crystal Structure     Hexagonal Hexagonal ( a & b ) Hexagonal
Water Absorption % @ R.T. ASTM C373 0.0 0.0 0.0 – 0.02
Hardness Moh’s   9 – 10 9 7.5
Hardness Rockwell        
Hardness knoop kg/mm2 Knoop 100G 2800 2200 ______
Compressive Strength MPa @ R.T. ASTM C773 1725 – 2500 689 – 2760 621
Compressive Strength M(106) lbs/in2        
Tensile Strength MPa @ R.T. ACMA Test #4 310 360 – 434 62
Elastic Modulus 106psi ASTM C848      
Modulus Of Elasticity

(Young’s Mod.)

 Gpa ASTM C848 476 317 138
Flexural Strength K(103) lbs/in2        
Flexural Strength

(MOR)

 MPa @ R.T. ASTM F417 324 679 – 896 140
Poisson’s Ratio   ASTM C818 0.19 0.23 ______
Poisson’s Ratio - ASTM C848      
Fracture Toughness MPa @ m1/2 Notched beam Test 4.0 5.0 – 8.0 ______
Max use Temperature

(* denotes inert atm)

 oC No Load Cond. 1400 1500 1425
Thermal Shock Resistance DT (0C) Quenching 350 – 500 750 190
Thermal Conductivity W/m-K @ R.T. ASTM C408 41 27 2.9
Coefficient of Linear Thermal Expansion 10-6/0C ASTM C372      
Coefficient of Linear Thermal Expansion mm/m-0C (-250C through £ 10000C) ASTM C372 5.12 3.4 7.0
Specific Heat Cal/g-0C @ R.T. ASTM C351 0.15 0.17 0.22
Dielectric Constant 1MHz @ R.T. ASTM D150 10.2 7.0 6.3
Dielectric Strength (60 cycles AC avg. RMS) .025 Thick .050 Thick Volts/mil ASTM D149      
Dielectric Strength kV/mm ASTM D116 _____ 17.7 9.3
Electrical Resistivity Wcm @ R.T. ASTM D1829 108 1013 104




Properties Units Test Boron Nitride Zirconia

(TZP)
Chemical Formula     BN ZrO2
Density g/cm3 ASTM C20 2.28 6.04
Color     White White
Crystal Structure     Hexagonal Tetragonal
Water Absorption % @ R.T. ASTM C373 0.0 0.0
Hardness Moh’s   6.5 6.5
Hardness Rockwell   2  
Hardness knoop kg/mm2 Knoop 100G 25-205 1600
Compressive Strength MPa @ R.T. ASTM C773 23.5 2500
Compressive Strength M(106) lbs/in2      
Tensile Strength MPa @ R.T. ACMA Test #4 2.41 (10000C) 248
Elastic Modulus 106psi ASTM C848    
Modulus Of Elasticity

(Young’s Mod.)

 Gpa ASTM C848 675 207
Flexural Strength K(103) lbs/in2      
Flexural Strength

(MOR)

 MPa @ R.T. ASTM F417 51.8 900
Poisson’s Ratio   ASTM C818 0.05 0.32
Poisson’s Ratio - ASTM C848    
Fracture Toughness MPa @ m1/2 Notched beam Test 2.6 13.0
Max use Temperature

(* denotes inert atm)

 oC No Load Cond. 985 500
Thermal Shock Resistance DT (0C) Quenching >1500 280 – 360
Thermal Conductivity W/m-K @ R.T. ASTM C408 20 2.7
Coefficient of Linear Thermal Expansion 10-6/0C ASTM C372    
Coefficient of Linear Thermal Expansion mm/m-0C (-250C through £ 10000C) ASTM C372 1.0 – 2.0 11.0
Specific Heat Cal/g-0C @ R.T. ASTM C351 0.19 0.10
Dielectric Constant 1MHz @ R.T. ASTM D150 4.08 26 @ 100kHz
Dielectric Strength (60 cycles AC avg. RMS) .025 Thick .050 Thick Volts/mil ASTM D149    
Dielectric Strength kV/mm ASTM D116 374 9.0
Electrical Resistivity Wcm @ R.T. ASTM D1829 1013 >1013