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loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-184\" src=\"https:\/\/aluminaceramics.net\/wp-content\/uploads\/2024\/06\/The-Alumina-Structure.jpg\" alt=\"\u30a2\u30eb\u30df\u30ca\u306e\u69cb\u9020\" width=\"750\" height=\"750\" srcset=\"https:\/\/aluminaceramics.net\/wp-content\/uploads\/2024\/06\/The-Alumina-Structure.jpg 750w, https:\/\/aluminaceramics.net\/wp-content\/uploads\/2024\/06\/The-Alumina-Structure-300x300.jpg 300w, https:\/\/aluminaceramics.net\/wp-content\/uploads\/2024\/06\/The-Alumina-Structure-150x150.jpg 150w, https:\/\/aluminaceramics.net\/wp-content\/uploads\/2024\/06\/The-Alumina-Structure-12x12.jpg 12w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/p>","protected":false},"excerpt":{"rendered":"<p>Alumina is an impressive crystalline form of aluminium oxide with outstanding properties. 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