99.5% Alumina Ceramic

High-purity aluminum oxide technical ceramic with extreme hardness.

Core Principles & Analysis

• Parts are pressed from powder and sintered near 1,600 °C, shrinking about 15-20% linearly as they densify.
• At Mohs hardness 9 it is exceeded among common materials only by a few carbides, cubic boron nitride, and diamond.
• It insulates virtually every automotive spark plug, and translucent grades such as GE's Lucalox (1961) form sodium street-lamp arc tubes.

Specifications & Metrics

• DENSITY: 3.90 g/cm³
• YIELD STRENGTH: 2000 MPa (Comp)
• HARDNESS: 1440 HV