Abstract
h-BN/feldspar composite was sintered under normal pressure at low temperature in air. Using oxygen-enriched h-BN powder was effective to increase the strength of composites. h-BN powder included 40mass% B2O3, and feldspar which melting point was nearly 1500 K, were mixed at a volume ratio of 1:1. The mixed powder was sintered without pressure at 1573 K in air. The average bending strength of the compacts was 47 MPa. It was revealed that the existence of melted B2O3 during sintering was the key point for both getting good wettability of the interface between h-BN and feldspar, and getting high strength of the composites.
