| abstract |
The present invention provides two hexagonal faces and six rectangular faces. The hexagonal faces have a flat octahedral shape in the direction opposite to each other, and the two corners of the hexagonal faces face each other. The average distance D between them is in the range of 3 to 110 μm, the length L of the short side of the rectangular surface is in the range of 2 to 45 μm, and L / D is between 0.05 and 0.8. The hexagonal surface and the rectangular surface are not formed into one The corners and corners form curved surfaces that intersect, and the aluminum nitride crystal particles having a true density in the range of 3.20 to 3.26 g / cm 3 , the aluminum nitride powder containing the same, the manufacturing method thereof, and the aluminum nitride crystal particles containing the above. Organic polymer composition and sintered body. |