CERAMIC JOINED PRODUCT AND ITS PRODUCTION

摘要

PROBLEM TO BE SOLVED: To provide a ceramic joined product which has the high position accuracy and perpendicularity of a pipe or bar joined to a plate and has excellent corrosion resistance and heat resistance of the joined portion. SOLUTION: This ceramic joined product is obtained by joining a plate 1 to a pipe 2 or bar through a joining agent layer which consists mainly of AlN and yttrium aluminum oxide and is placed between the tapered surface 3 of the plate 1 and the tapered 5 of the pipe 2 or bar. A dent 4 whose inner peripheral surface is the outward opened tapered surface 3 is formed on one surface of the plate 1, and the grain boundary component of the plate 1 comprises an AlN sintered compact of yttrium aluminum oxide phase. The tapered surface 5 capable of being engaged with the tapered surface 3 of the dent 4 is formed on the outer periphery of one end of the pipe 2 or bar, and the pipe 2 or bar comprises the same AlN sintered compact as the plate.