| 摘要 |
PROBLEM TO BE SOLVED: To obtain a low expansion ceramic ladle capable of improving the productivity of a casting machine, etc., and the quality of castings as a ladle used for separating and feeding a nonferrous molten metal such as an Al alloy. SOLUTION: This ladle is made of an aluminum titanate sintered compact having a grain boundary phase made of Ti-Al-Si-O mixed crystals consisting of 9.4-12.2mol% Ti, 18.8-24.2mol% Al, 0.8-8.3mol% Si and the balance O and having 0-0.2% coefft. of linear expansion at the time of heating to 1,000 deg.C and $0.1% difference in the coefft. of linear expansion due to hysteresis at the time of cooling. The aluminum titanate sintered compact has high strength and superior thermal shock resistance because of its low thermal expandability and non-hysteresis. |
