BN SINTERED COMPACT HAVING EXCELLENT CORROSION RESISTANCE

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The purpose of the present invention is to provide a boron nitride sintered compact having excellent corrosion resistance with respect to molten metal containing rare earths. Provided is a boron nitride sintered compact characterized by having a boron nitride content of 80.0 mass% or greater, and containing 0.3 to 12.0 mass% of calcium in terms of calcium oxide and 1.0 to 18.0 mass% of yttrium in terms of yttrium oxide.