How to Use alumina in a Sentence

alumina

noun
  • Last year, there was as deficit of alumina, according to the company.
    — Micah Maidenberg, WSJ, 16 Jan. 2019
  • As Century paid a lot more for alumina, its profit margins were crushed even as aluminum prices surged.
    — Peter Eavis, New York Times, 10 July 2019
  • It is estimated that for every ton of alumina produced, one to two tons of red mud is created.
    — New Atlas, 17 Sep. 2025
  • The factory would mix the ore with chemicals and heat it to separate alumina from the ore — the first step in producing raw aluminum.
    — Keith Bradsher and Ailin Tang, New York Times, 13 Mar. 2018
  • Those ions pass through the beta-alumina ceramic into the cathode compartment.
    — Tejasri Gururaj, Interesting Engineering, 6 Jan. 2026
  • Guinea should move beyond raw bauxite exports toward alumina refining.
    — W. Gyude Moore, semafor.com, 25 May 2026
  • Producers refine an oxide from bauxite to create alumina, which is turned into aluminum metal at smelters.
    — Micah Maidenberg, WSJ, 15 Jan. 2020
  • This process uses caustic liquids and high temperatures to extract and refine alumina from bauxite ore.
    — Atharva Gosavi, Interesting Engineering, 6 June 2026
  • In the smelting process, the raw material, alumina, is poured into large pots, bathed in caustic chemicals and fried with heavy electric current.
    — Paul Roberts, The Seattle Times, 26 Aug. 2017
  • Sales slightly exceeded expectations amid rising prices for aluminum and the feedstock alumina.
    — Bob Tita, WSJ, 24 Jan. 2017
  • Rusal had provided 7 percent of the world’s alumina, the raw material for aluminum production.
    — Eric Levitz, Daily Intelligencer, 23 Apr. 2018
  • The practice is common in aluminum production, where the smelting process uses vast amounts of electricity to create aluminum metal from alumina.
    — Megan Geuss, Ars Technica, 16 Mar. 2018
  • Despite business-friendly rules, the recovery of foreign investment has been modest and, after a recent decline in alumina prices, may now falter.
    — The Economist, 9 Nov. 2019
  • The new centimeter-wide disks are made from two thin perforated membranes of ceramic alumina connected by tiny vertical supports.
    — Payal Dhar, Scientific American, 19 Aug. 2025
  • Many of the most common technologies -- such as reverse osmosis, deionization and activated alumina -- cost in the hundreds of dollars.
    — OregonLive.com, 14 Dec. 2017
  • Raw materials including coke, which helps to fuel iron-ore smelters, and caustic soda, used to extract alumina from bauxite, are also rocketing higher in price.
    — Rhiannon Hoyle, WSJ, 12 Mar. 2018
  • Between the anode and cathode sits a thin ceramic tube made of beta-alumina—a solid material that conducts sodium ions but blocks almost everything else.
    — Tejasri Gururaj, Interesting Engineering, 6 Jan. 2026
  • Bauxite is a clay rock that is refined to produce aluminum hydroxide, or alumina, which is then smelted to produce primary aluminum (secondary aluminum comes from recycled scrap).
    — Greg Ip, WSJ, 9 Mar. 2018
  • Authorities in Brazil ordered a huge alumina producer to operate at half capacity after a spill.
    — Peter Eavis, New York Times, 10 July 2019
  • Prices of alumina, which is extracted from bauxite, rose until 2018, reviving the mining industry.
    — The Economist, 9 Nov. 2019
  • The top layer of the disk is a four-micrometer circle of 40-nanometer gold membrane resting on a small piece of alumina on layer of silicon deposited on silica.
    — IEEE Spectrum, 14 Nov. 2019
  • The materials—iron, salt, alumina, and sodium—come from broadly available domestic supply chains, avoiding many of the geopolitical and price risks tied to lithium, nickel, and cobalt.
    — Tejasri Gururaj, Interesting Engineering, 6 Jan. 2026
  • Guinea, the world’s top bauxite exporter, has begun mandating that foreign mining companies invest in local alumina refineries to increase value.
    — Charlie Campbell, Time, 30 Oct. 2025
  • After the solution settles or is filtered, the aluminum minerals are harvested, forming a material known as alumina, and the rest of the materials form a solid waste known as red mud.
    — New Atlas, 17 Sep. 2025
  • Alcoa reaffirmed its expectations for stable aluminum and alumina production in 2026, with volumes generally in line with current run rates.
    — Trefis Team, Forbes.com, 30 Jan. 2026
  • Further strength is provided by micrometre-sized particles of alumina and silicon nanoprecipitates embedded in the ‘cement’ matrix, as per the release.
    — Prabhat Ranjan Mishra, Interesting Engineering, 24 Nov. 2025
  • Below that sits an alumina-zircon-silica nozzle, which can programmed to make the same intricate moves in X-, Y-, and Z-space familiar to anyone who has seen a 3D printer in action.
    — Jake Swearingen, Popular Mechanics, 21 Aug. 2015
  • Bloomberg News reported that Rusal officials met Chinese companies and traders this week to discuss the possibility of buying alumina and selling aluminum in the Asian country.
    — David Hodari, WSJ, 20 Apr. 2018
  • Such proposals often involve sulfates, particles that form in the stratosphere from sulfur dioxide ejected by volcanoes, or other molecules with high reflectivity, such as diamond dust or alumina (aluminum oxide).
    — Paul Voosen, Science | AAAS, 21 Mar. 2018
  • Aluminum rose as China’s top state smelter suspends production capacity of intermediate material alumina.
    — Brian Chappatta, Bloomberg.com, 11 May 2017

Some of these examples are programmatically compiled from various online sources to illustrate current usage of the word 'alumina.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Last Updated: