| 11. | In the laboratory, aluminium oxide ( or porous pot ) must be heated.
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| 12. | The material is sensitive to moisture, hydrolyzing to hydrated aluminium oxides / hydroxides.
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| 13. | Smaller amount of zinc oxide or aluminium oxide can be added for increasing chemical stability.
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| 14. | The products are aluminium oxide, elemental iron, and a large amount of heat.
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| 15. | Inorganic phosphate ions are generally attracted towards charged minerals such as iron and aluminium oxides.
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| 16. | Aluminium oxide is also amphoteric in nature.
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| 17. | In 1982 an exceptionally strong composite of aluminium oxide and silicon carbide whiskers was discovered.
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| 18. | Aluminium oxide is not an electrical insulator.
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| 19. | They have no accumulation of clays, iron oxide, aluminium oxide or organic matter.
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| 20. | Aluminium oxide is often put into the mix to make the surface more hard wearing.
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