FINE CERAMICS

Fine ceramics have different characteristics such as those excellent in heat resistance, those with excellent wear resistance, those excellent in chemical resistance, those with excellent electrical insulating properties, and those with excellent thermal conductivity, therefore, it is important to select the material according to the required characteristics.

The features and properties of the major fine ceramics are as follows;

Classification Engineering Ceramics Machinable Ceramics
Code Type
E-1
Type
E-2
Type
E-3
Type
E-4
Type
E-5
Type
M-1
Type
M-2
Type
M-3
Material Alumina Zirconia Silicon Nitride Silicon Carbide Aluminum Nitride Machinable Ceramics Boron Nitride Aluminum Nitride
Main component / Composition Al2O3 99.5% ZrO2 Si3N4 SiC AlN Fluorphlogopite BN AlN
General
Properties
Color ivory white gray black gray white white light gray
Specific Gravity g/㎝3 3.9 6.0 3.2 3.1 3.2 2.6 2.0 2.9
Water Absorption Ratio 0 0 0 0 0 0 0.4 0
Thermal
Properties
Max. Useable Temperature 1500 1200 1600 1000 1000 2200
non-oxidative atmosphere
1900
non-oxidative atmosphere
Thermal Shock Resistance 200 250 700 400 400 150 1500 400
Thermal Conductivity
(25℃)
W/m・k 30 3 25 75 170 1.7 36 90
Thermal Conductivity
(400℃)
W/m・k 13 3 80
Thermal Conductivity
(800℃)
W/m・k 9 3 50
Thermal Expansion Coefficient
(25~200℃)
1/℃
×
10-6
6.5 9.5 4.5
Thermal Expansion Coefficient
(25~400℃)
1/℃
×
10-6
7.0 10.0 8.5 4.4
Thermal Expansion Coefficient
(25~600℃)
1/℃
×
10-6
7.5 10.3 4.8
Thermal Expansion Coefficient
(25~800℃)
1/℃
×
10-6
7.9 10.3 3.2 3.2 5.1
Mechanical
Properties
Flexural Strength MPa 340 1100 880 490 350 147 35 290
Compressive Strength MPa 2900 3000 2940 3000 50 1180
Young's Modulus GPa 350 210 290 390 320 66 180
Hardness(Vickers) GPa 15 13 16 20 11 2.2 3.9
Electrical
Properties
Volume Resistivity
(25℃)
Ω・㎝ 1×1015 0.8×1012 1×1014 3×106 0.1×1015 1.8×1015 10×1015 20×1012
Volume Resistivity
(300℃)
Ω・㎝ 1×1013
Volume Resistivity
(500℃)
Ω・㎝ 1×1010 30×106
Volume Resistivity
(800℃)
Ω・㎝ 1×109
Dielectric Breakdown Voltage KV/㎜ >10 15 18 40
Dielectric Constant 1MHz 10 8.3 8.8 6.1 4 7
Dielectric Tangent 1MHz 0.0004 0.0005 0.0008 0.001
Main Characteristic Well balanced with wear resistance, heat resistance, chemical resistance, mechanical strength, and electrical insulation. Highest toughness and strength at room temperature of all fine ceramics.
Wear resistance.
Excellent thermal shock strength.
Inactive against melted metal.
Wear resistance.
Heat resistance.
Chemical resistance.
High mechanical strength under high temperatures.
High thermal conductivity. Excellent machinability.
Rapid delivery.
Heat insulation(thermal insulation) .
Heat resistance.
Thermal shock strength.
High thermal conductivity.
High thermal conductivity.

Fine Ceramics other than the above can also be supplied.

Listed values ​​are measured, it is not a guaranteed value.

Max. useable temperature is for reference only, and varies depending on the operating conditions.