Alumina is a word that is often used in chemistry and material science. It is a term that refers to a specific type of compound that is used in a variety of applications. In this article, we will explore the definition and meaning of alumina, its origin, associations, synonyms, antonyms, and examples of how it is used in sentences.
Definitions
Alumina is a compound that is made up of aluminum and oxygen. Its chemical formula is Al2O3. It is a white or grayish-white powder that is insoluble in water. Alumina is a type of oxide that is commonly found in nature as the mineral corundum.
Origin
The word alumina comes from the Latin word alumen, which means “alum.” Alum is a type of compound that was used in ancient times as a mordant in dyeing and as a medicine. Alumina was first isolated in the 19th century by chemists who were studying the properties of aluminum.
Meaning in different dictionaries
According to the Merriam-Webster dictionary, alumina is defined as “a white or nearly white crystalline oxide of aluminum that is used especially in refractories, ceramics, and abrasives.” The Oxford English Dictionary defines it as “a white or grayish-white powder consisting of aluminum oxide, used in the manufacture of ceramics, glass, and refractories.”
Associations
Alumina is commonly used in the production of ceramics, glass, and refractories. It is also used as an abrasive and as a catalyst in chemical reactions. Alumina is a key component in the manufacturing of aluminum, which is used in a variety of industries.
Synonyms
Some synonyms of alumina include aluminum oxide, corundum, and alpha-alumina.
Antonyms
There are no specific antonyms for alumina, as it is a compound rather than a concept or idea.
The same root words
Some words that share the same root as alumina include alum, aluminum, and aluminize.
Example Sentences
- The ceramic tiles were made with a mixture of clay and alumina.
- The abrasive properties of alumina make it ideal for sanding and polishing.
- The aluminum industry relies heavily on the production of alumina.
- The refractory lining of the furnace was made with high-purity alumina.
- The catalyst was made by impregnating alumina with a metal salt.