abstract |
The present invention is to provide an alumina particle having an average particle diameter of 3 to 1000 µm, formed of three or more sheets of flat alumina and having a fixed cardhouse structure. In addition, the three or more sheets of flat alumina are intersected at a plurality of locations of two or more, and the plane directions of the crossing flats are arranged in a disorderly manner, and have a fixed cardhouse structure. It is to provide alumina particles, characterized in that 3 ~ 1000㎛. |