Effect of Oxygen-enriched h-BN Powder on the Property of h-BN/Feldspar Composite

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  • ｈ‐ＢＮ／長石‐複合焼結体の特性に及ぼす高酸素含有ｈ‐ＢＮ粉末使用の効果
  • h-BN/長石-複合焼結体の特性に及ぼす高酸素含有h-BN粉末使用の効果
  • h-BN/チョウセキ-フクゴウ ショウケツタイ ノ トクセイ ニ オヨボス コウサンソ ガンユウ h-BN フンマツ シヨウ ノ コウカ

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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.

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