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Table 2 Typical properties of alumina disc

From: Optimization of wear loss in silicon nitride (Si3N4)–hexagonal boron nitride (hBN) composite using DoE–Taguchi method

Designation Purity (%) Density (g/cc) Max service temp. (°C) Avg. surface roughness Ra (μm)
Alumina (Al2O3) 99.8 3.90 1800 1.791