| 摘要 |
PROBLEM TO BE SOLVED: To provide a porous aluminum nitride, especially formed by reductively nitriding AlN polytypoid. SOLUTION: In this invention, it is noticed that a sintered compact in which plate-like crystals intertangle with one another and the pore distribution is uniform can be produced by reductively nitriding the AlN polytypoid because the AlN polytypoid, especially 27 R is a crystal having a plate-like form. The porous aluminum nitride having excellent quality is obtained by following two stage process, comprising (1) a first stage for producing a porous AlN polytypoid, and (2) a second stage for reducing the porous AlN polytypoid with carbon. The porous aluminum nitride has a porosity of 5 to 60% and pore diameter distribution of ○○ to ○○. Further, the porous aluminum nitride having a porosity of 5 to 60% is obtained by subjecting Al-Si-O-N-based AlN polytypoid to heat treatment in the presence of nitrogen and carbon. |
