Material Introdution
Alumina (Al2O3) is one of the most widely specified, general-purpose technical ceramics. All aluminas are very hard and wear resistant, with high compressive strength even against extreme temperatures and corrosive environments. Aluminas are also excellent electrical insulators and are gas tight. Aluminum Oxide Ceramic is produced by firing a tightly packed powder form of Al2O3 which includes some binder material. Commercially available grades range from 90% up to 99.8% with the higher purity generating somewhat higher hardness. It is possible to machine alumina using diamond grinding techniques. Polishing is also possible, with the degree attainable affected by alumina grain size and production technique, whether pressed or extruded.
High Hardness
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Low Coefficient of Thermal Expansion
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Excellent Electrical Insulator
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Mechanically Stable at High Temperature
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Good Thermal Shock Resistance
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High density, non-porous and vacuum tight
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Resists Abrasive Wear and Chemical Attack
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......
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Standard Dimensions and Tolerance
Length X Width
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Thickness
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Tolerance (Thickness)
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110mm x 110mm (4.3" x 4.3")
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0.25mm (0.010")
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±0.03mm(<1.0mm)
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114mm x 114mm (4.5" x 4.5")
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0.38mm (0.015")
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±0.05mm(1.0mm - 1.5mm)
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120mm x 120mm (4.7" x 4.7")
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0.50mm (0.020")
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±0.07mm(>1.5mm)
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127mm x 127mm (5.0" x 5.0")
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0.63mm (0.250")
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±0.10mm(>2.0mm)
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130mm x 140mm (5.1" x 5.5")
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0.76mm (0.030")
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109mm x 130mm (4.3" x 5.1")
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1.00mm (0.390")
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Tolerance (Length and Width)
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190mm x 140mm (7.5" x 5.5")
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2.00mm (0.790")
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+0.25mm/-0.05mm
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∆ Customized dimensions are available. Laser cutting service can be provided and make customized shapes and holes.