| abstract |
The present invention relates to an aluminum oxide article, which is composed of at least aluminum atoms and oxygen atoms, and the cross-section of the aluminum oxide article observed by a transmission electron microscope includes crystallized parts where the lattice image can be confirmed and the impossible Confirm that the amorphous part of the lattice image has a sea-island structure including an isolated part containing the above-mentioned crystallized part and a continuous amorphous part (wherein, the above-mentioned isolated part is equivalent to the island part of the sea-island structure, and the above-mentioned continuous amorphous part is equivalent In the sea part of the island structure), and a plurality of the above-mentioned island parts are evenly distributed in the above-mentioned sea part. According to the present invention, there is provided an aluminum oxide for improving the battery performance of a lithium ion secondary battery, the scratch resistance and hardness of the cured film, and the gas shielding properties of the gas shielding film. |