Silicon carbide sintered body, manufacturing method of silicon carbide sintered body, firing jig, firing furnace and metal molten metal holding furnace

摘要

PROBLEM TO BE SOLVED: To provide a silicon carbide sintered compact excellent in thermal impact resistance, strength, high temperature strength and oxidation resistance, a method for producing the silicon carbide sintered compact, a firing fixture, a firing furnace, and a molten metal holding furnace.SOLUTION: Provided is a silicon carbide sintered compact, where, in the particle size distribution of silicon carbide, the value of the 1/3 of the maximum particle diameter D99 of the silicon carbide is defined as the standard particle diameter Dp, further, the range in which the particle diameter is O mm to Dp is defined as the first range, the range in which the particle diameter is above Dp to a value double the Dp or lower is defined as the second range, and the range in which the particle diameter is a value higher than the double the Dp to D99 is defined as the third range, the particles of 10 to 40% are present in the first range, also, the particles of 10 to 40% are present in the third range, the particles of 10 to 40% are present in the first range, the particles of 10 to 40% are present in the third range, and also, the total of the particles present in the first range and the third range is 34% or higher.SELECTED DRAWING: Figure 5A