Abstract:
There is provided a ceramic sintered body which has excellent thermal shock resistance and which is not susceptible to discoloration due to oxidation, and an anticorrosion member, filter ad antihalation member formed using the same. A ceramic sintered body includes silicon nitride in an amount of greater than or equal to 80% by mass based on a total mass of the ceramic sintered body, compounds containing Fe and Si being scattered in a surface portion of the ceramic sintered body, and particles of the compounds having an equivalent circle diameter of 0.05 µm or more but 5 µm or less being present in a number of greater than or equal to 2.0 × 10 4 but less than or equal to 2.0 × 10 5 per 1 mm 2 . Thus, the ceramic sintered body has excellent thermal shock resistance and is not susceptible to discoloration due to oxidation.
Abstract:
[Object] To provide a silicon nitride sintered body and a heat conduction member which have high corrosion resistance to an alkali component and high thermal conductivity. [Solution] The silicon nitride sintered body includes a silicon nitride crystal, and a grain boundary phase including at least any of sodium oxide and potassium oxide. A total amount of the sodium oxide and the potassium oxide is 0.2% by mass or more and 1% by mass or less in terms of Na 2 O and K 2 O on the basis of the total mass. When this configuration is satisfied, it is possible to attain both high corrosion resistance to alkali and high heat conductivity.
Abstract:
There is provided a ceramic sintered body which has excellent thermal shock resistance and which is not susceptible to discoloration due to oxidation, and an anticorrosion member, filter ad antihalation member formed using the same. A ceramic sintered body includes silicon nitride in an amount of greater than or equal to 80% by mass based on a total mass of the ceramic sintered body, compounds containing Fe and Si being scattered in a surface portion of the ceramic sintered body, and particles of the compounds having an equivalent circle diameter of 0.05 µm or more but 5 µm or less being present in a number of greater than or equal to 2.0 × 10 4 but less than or equal to 2.0 × 10 5 per 1 mm 2 . Thus, the ceramic sintered body has excellent thermal shock resistance and is not susceptible to discoloration due to oxidation.
Abstract:
Object: To provide a ceramic joint body having excellent durability and corrosion resistance when used in a corrosive gas environment or in a corrosive liquid environment. Resolution means: A ceramic joint body (10) according to the present invention, includes: a first silicon carbide ceramic (1); a second silicon carbide ceramic (2); a joint layer (3) provided between the first silicon carbide ceramic (1) and the second silicon carbide ceramic (2); a first coating layer (4) containing metallic silicon as a primary component and provided on an area extending from the surface of the joint layer (3) to at least one surface of the first silicon carbide ceramic (1) and the second silicon carbide ceramic (2); and a second coating layer (5) containing any one of Ni, Cu, Al or Cr as a primary component and provided on the surface of the first coating layer (4).
Abstract:
[Object] To provide a sialon sintered compact having a high hardness and a wear-resistant component made of the sintered compact. [Solution] A sialon sintered compact includes a main phase made of α-sialon, and a sub phase made of β-sialon. The molar concentration of aluminum in the β-sialon is higher than the molar concentration of aluminum in the α-sialon. Such a sialon sintered compact can exhibit high strength. A wear-resistant component made of the sialon sintered compact exhibits a high hardness, and accordingly has high reliability.