Alumina definition. ALUMINA definition: the natural or synthetic oxide of aluminum, Al 2 O 3 , occurring in nature in a pure crystal form as corundum. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. Aluminium oxide (or aluminium (III) oxide) is a chemical compound of aluminium and oxygen with the chemical formula Al2O3. Alumina is refined from bauxite. Feb 23, 2026 · Alumina, synthetically produced aluminum oxide, Al2O3, a white or nearly colourless crystalline substance that is used as a starting material for the smelting of aluminum metal. Definition Activated alumina is a highly porous form of aluminum oxide that is utilized as an adsorbent and catalyst in various industrial applications. It appears as a white, powdery material and serves as the primary constituent in bauxite ore, which is refined through electrolysis to produce aluminum metal. alum. . → another name for aluminium oxide. ; Al; 26. It is characterized by its abundance and ease of processing compared to other sources like corundum. n. 98; 13; 2. Alumina, or aluminum oxide (Al2O3), is a crucial component in the production of aluminum, which is a representative metal. See examples of alumina used in a sentence. ALUMINUM definition | Meaning, pronunciation, translations and examples a silvery, lightweight, easily worked, metallic chemical element that resists corrosion and is found abundantly, but only in combination: symbol, Al; at. What does alumina mean? Information and translations of alumina in the most comprehensive dictionary definitions resource on the web. Alumina is defined as a chemical compound derived from aluminum ore bauxite, serving as a key raw material for the aluminum industry. The compound can exist in various crystalline forms, including alpha (α) and gamma (γ) alumina, each with distinct properties and applications. [7] It Sep 24, 2024 · What is Alumina? Al2O3 is an inorganic compound consisting of aluminum and oxygen elements and is the main oxide of aluminum. Aluminum is extracted from alumina through the electrolytic reduction process, which involves the smelting of alumina. 13 Definition of alumina in the Definitions. It is the most commonly occurring of several aluminium oxides, and specifically identified as aluminium oxide. The meaning of ALUMINA is the oxide of aluminum Al2O3 that occurs both in pure form as corundum and in hydrated forms (as in bauxite). 70 at 20°C. In addition to its industrial applications, alumina is also utilized in the creation of refractory materials that can withstand high temperatures without melting or deforming. Meaning of alumina. Alumina, scientifically known as aluminum oxide (Al₂O₃), is a chemical compound comprising aluminum and oxygen. Definition of aluminum noun in Oxford Advanced American Dictionary. Define alumina. Any of several forms of aluminum oxide, Al2O3, occurring naturally as corundum, in a hydrated form in bauxite, and with various impurities as ruby, → another name for aluminium oxide. ALUMINUM definition: a silver-white metallic element, light in weight, ductile, malleable, and not readily corroded or tarnished, occurring combined in nature in igneous rock, shale, clay, and most soil: used in alloys and for lightweight utensils, castings, airplane parts, etc. no. See examples of aluminum used in a sentence. It is commonly called alumina and may also be called aloxide, aloxite, ALOX or alundum in various forms and applications. Click for English pronunciations, examples sentences, video. alumina synonyms, alumina pronunciation, alumina translation, English dictionary definition of alumina. Definition of alumina noun in Oxford Advanced Learner's Dictionary. Its unique structure allows it to effectively absorb moisture and other substances, making it particularly useful in processes such as drying gases and liquids, as well as removing impurities from water. An oxide of aluminum, Al 2 O 3, present in bauxite and clay and found as different forms of corundum, including emery, sapphires, and rubies. Alumina acts as a key catalyst support in various chemical reactions, enhancing the efficiency of processes like oil refining and petrochemical production. This material plays an important role Aluminum oxide exhibits strong bonding and high thermal stability, making it suitable for use in high-temperature applications. net dictionary. licjxay eiqtoqg udmeojn hjaq xcyvm cxydr xglhp dzfr lzn nvgvgpq